model: implement Serializable with model classes

implement equals() and hashCode()

CHANGELOG.md

@@ -7,6 +7,7 @@
 * Add `migration`, `recovery_seal` and `storage_type` fields to `SealReponse` model
 * Add support for `wrap_info` in data response models
 * Dependency updates
+* model and response classes implement `Serializable` (#57)
 
 ### Test
 * Tested against Vault 1.10.0

pom.xml

@@ -149,6 +149,12 @@
             <version>2.11.0</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>nl.jqno.equalsverifier</groupId>
+            <artifactId>equalsverifier</artifactId>
+            <version>3.9</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <dependencyManagement>

src/main/java/de/stklcode/jvault/connector/model/AppRole.java

@@ -18,17 +18,22 @@ package de.stklcode.jvault.connector.model;
 
 import com.fasterxml.jackson.annotation.*;
 
+import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Objects;
 
 /**
  * Vault AppRole role metamodel.
  *
  * @author Stefan Kalscheuer
  * @since 0.4.0
+ * @since 1.1 implements {@link Serializable}
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
-public final class AppRole {
+public final class AppRole implements Serializable {
+    private static final long serialVersionUID = -6248529625864573990L;
+
     /**
      * Get {@link Builder} instance.
      *
@@ -316,6 +321,39 @@ public final class AppRole {
         return tokenType;
     }
 
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        AppRole appRole = (AppRole) o;
+        return Objects.equals(name, appRole.name) &&
+                Objects.equals(id, appRole.id) &&
+                Objects.equals(bindSecretId, appRole.bindSecretId) &&
+                Objects.equals(secretIdBoundCidrs, appRole.secretIdBoundCidrs) &&
+                Objects.equals(secretIdNumUses, appRole.secretIdNumUses) &&
+                Objects.equals(secretIdTtl, appRole.secretIdTtl) &&
+                Objects.equals(enableLocalSecretIds, appRole.enableLocalSecretIds) &&
+                Objects.equals(tokenTtl, appRole.tokenTtl) &&
+                Objects.equals(tokenMaxTtl, appRole.tokenMaxTtl) &&
+                Objects.equals(tokenPolicies, appRole.tokenPolicies) &&
+                Objects.equals(tokenBoundCidrs, appRole.tokenBoundCidrs) &&
+                Objects.equals(tokenExplicitMaxTtl, appRole.tokenExplicitMaxTtl) &&
+                Objects.equals(tokenNoDefaultPolicy, appRole.tokenNoDefaultPolicy) &&
+                Objects.equals(tokenNumUses, appRole.tokenNumUses) &&
+                Objects.equals(tokenPeriod, appRole.tokenPeriod) &&
+                Objects.equals(tokenType, appRole.tokenType);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(name, id, bindSecretId, secretIdBoundCidrs, secretIdNumUses, secretIdTtl,
+                enableLocalSecretIds, tokenTtl, tokenMaxTtl, tokenPolicies, tokenBoundCidrs, tokenExplicitMaxTtl,
+                tokenNoDefaultPolicy, tokenNumUses, tokenPeriod, tokenType);
+    }
+
 
     /**
      * A builder for vault AppRole roles..

src/main/java/de/stklcode/jvault/connector/model/AppRoleSecret.java

@@ -18,17 +18,22 @@ package de.stklcode.jvault.connector.model;
 
 import com.fasterxml.jackson.annotation.*;
 
+import java.io.Serializable;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 
 /**
  * Vault AppRole role metamodel.
  *
  * @author Stefan Kalscheuer
  * @since 0.4.0
+ * @since 1.1 implements {@link Serializable}
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
-public final class AppRoleSecret {
+public final class AppRoleSecret implements Serializable {
+    private static final long serialVersionUID = -3401074170145792641L;
+
     @JsonProperty("secret_id")
     @JsonInclude(JsonInclude.Include.NON_NULL)
     private String id;
@@ -166,4 +171,29 @@ public final class AppRoleSecret {
     public Integer getTtl() {
         return ttl;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        AppRoleSecret that = (AppRoleSecret) o;
+        return Objects.equals(id, that.id) &&
+                Objects.equals(accessor, that.accessor) &&
+                Objects.equals(metadata, that.metadata) &&
+                Objects.equals(cidrList, that.cidrList) &&
+                Objects.equals(creationTime, that.creationTime) &&
+                Objects.equals(expirationTime, that.expirationTime) &&
+                Objects.equals(lastUpdatedTime, that.lastUpdatedTime) &&
+                Objects.equals(numUses, that.numUses) &&
+                Objects.equals(ttl, that.ttl);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, accessor, metadata, cidrList, creationTime, expirationTime, lastUpdatedTime, numUses,
+                ttl);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/Token.java

@@ -20,6 +20,7 @@ import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
+import java.io.Serializable;
 import java.util.*;
 
 /**
@@ -27,9 +28,12 @@ import java.util.*;
  *
  * @author Stefan Kalscheuer
  * @since 0.4.0
+ * @since 1.1 implements {@link Serializable}
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
-public final class Token {
+public final class Token implements Serializable {
+    private static final long serialVersionUID = 5208508683665365287L;
+
     /**
      * Get {@link Builder} instance.
      *
@@ -214,6 +218,35 @@ public final class Token {
         return entityAlias;
     }
 
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        Token token = (Token) o;
+        return Objects.equals(id, token.id) &&
+                Objects.equals(type, token.type) &&
+                Objects.equals(displayName, token.displayName) &&
+                Objects.equals(noParent, token.noParent) &&
+                Objects.equals(noDefaultPolicy, token.noDefaultPolicy) &&
+                Objects.equals(ttl, token.ttl) &&
+                Objects.equals(explicitMaxTtl, token.explicitMaxTtl) &&
+                Objects.equals(numUses, token.numUses) &&
+                Objects.equals(policies, token.policies) &&
+                Objects.equals(meta, token.meta) &&
+                Objects.equals(renewable, token.renewable) &&
+                Objects.equals(period, token.period) &&
+                Objects.equals(entityAlias, token.entityAlias);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, type, displayName, noParent, noDefaultPolicy, ttl, explicitMaxTtl, numUses, policies,
+                meta, renewable, period, entityAlias);
+    }
+
     /**
      * Constants for token types.
      */

src/main/java/de/stklcode/jvault/connector/model/TokenRole.java

@@ -20,17 +20,22 @@ import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
+import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Objects;
 
 /**
  * Vault Token Role metamodel.
  *
  * @author Stefan Kalscheuer
  * @since 0.9
+ * @since 1.1 implements {@link Serializable}
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
-public final class TokenRole {
+public final class TokenRole implements Serializable {
+    private static final long serialVersionUID = -6159563751115867561L;
+
     /**
      * Get {@link Builder} instance.
      *
@@ -205,6 +210,36 @@ public final class TokenRole {
         return tokenType;
     }
 
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        TokenRole tokenRole = (TokenRole) o;
+        return Objects.equals(name, tokenRole.name) &&
+                Objects.equals(allowedPolicies, tokenRole.allowedPolicies) &&
+                Objects.equals(disallowedPolicies, tokenRole.disallowedPolicies) &&
+                Objects.equals(orphan, tokenRole.orphan) &&
+                Objects.equals(renewable, tokenRole.renewable) &&
+                Objects.equals(pathSuffix, tokenRole.pathSuffix) &&
+                Objects.equals(allowedEntityAliases, tokenRole.allowedEntityAliases) &&
+                Objects.equals(tokenBoundCidrs, tokenRole.tokenBoundCidrs) &&
+                Objects.equals(tokenExplicitMaxTtl, tokenRole.tokenExplicitMaxTtl) &&
+                Objects.equals(tokenNoDefaultPolicy, tokenRole.tokenNoDefaultPolicy) &&
+                Objects.equals(tokenNumUses, tokenRole.tokenNumUses) &&
+                Objects.equals(tokenPeriod, tokenRole.tokenPeriod) &&
+                Objects.equals(tokenType, tokenRole.tokenType);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(name, allowedPolicies, disallowedPolicies, orphan, renewable, pathSuffix,
+                allowedEntityAliases, tokenBoundCidrs, tokenExplicitMaxTtl, tokenNoDefaultPolicy, tokenNumUses,
+                tokenPeriod, tokenType);
+    }
+
     /**
      * A builder for vault token roles.
      *

src/main/java/de/stklcode/jvault/connector/model/response/AppRoleResponse.java

@@ -24,6 +24,7 @@ import de.stklcode.jvault.connector.model.AppRole;
 import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Objects;
 
 /**
  * Vault response for AppRole lookup.
@@ -33,6 +34,8 @@ import java.util.Map;
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
 public final class AppRoleResponse extends VaultDataResponse {
+    private static final long serialVersionUID = -7817890935652200399L;
+
     private AppRole role;
 
     @Override
@@ -58,4 +61,20 @@ public final class AppRoleResponse extends VaultDataResponse {
     public AppRole getRole() {
         return role;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass() || !super.equals(o)) {
+            return false;
+        }
+        AppRoleResponse that = (AppRoleResponse) o;
+        return Objects.equals(role, that.role);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(super.hashCode(), role);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/AppRoleSecretResponse.java

@@ -24,6 +24,7 @@ import de.stklcode.jvault.connector.model.AppRoleSecret;
 import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Objects;
 
 /**
  * Vault response for AppRole lookup.
@@ -33,6 +34,8 @@ import java.util.Map;
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
 public final class AppRoleSecretResponse extends VaultDataResponse {
+    private static final long serialVersionUID = 7511563325431032667L;
+
     private AppRoleSecret secret;
 
     @Override
@@ -58,4 +61,20 @@ public final class AppRoleSecretResponse extends VaultDataResponse {
     public AppRoleSecret getSecret() {
         return secret;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass() || !super.equals(o)) {
+            return false;
+        }
+        AppRoleSecretResponse that = (AppRoleSecretResponse) o;
+        return Objects.equals(secret, that.secret);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(super.hashCode(), secret);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/AuthMethodsResponse.java

@@ -24,6 +24,7 @@ import de.stklcode.jvault.connector.model.response.embedded.AuthMethod;
 import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Objects;
 
 /**
  * Authentication method response.
@@ -33,6 +34,8 @@ import java.util.Map;
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
 public final class AuthMethodsResponse extends VaultDataResponse {
+    private static final long serialVersionUID = 5521702564857621352L;
+
     private Map<String, AuthMethod> supportedMethods;
 
     /**
@@ -61,4 +64,20 @@ public final class AuthMethodsResponse extends VaultDataResponse {
     public Map<String, AuthMethod> getSupportedMethods() {
         return supportedMethods;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass() || !super.equals(o)) {
+            return false;
+        }
+        AuthMethodsResponse that = (AuthMethodsResponse) o;
+        return Objects.equals(supportedMethods, that.supportedMethods);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(super.hashCode(), supportedMethods);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/AuthResponse.java

@@ -24,6 +24,7 @@ import de.stklcode.jvault.connector.model.response.embedded.AuthData;
 
 import java.io.IOException;
 import java.util.Map;
+import java.util.Objects;
 
 /**
  * Vault response for authentication providing auth info in {@link AuthData} field.
@@ -33,6 +34,8 @@ import java.util.Map;
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
 public final class AuthResponse extends VaultDataResponse {
+    private static final long serialVersionUID = -6728387061352164781L;
+
     private Map<String, Object> data;
 
     private AuthData auth;
@@ -71,4 +74,20 @@ public final class AuthResponse extends VaultDataResponse {
     public AuthData getAuth() {
         return auth;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass() || !super.equals(o)) {
+            return false;
+        }
+        AuthResponse that = (AuthResponse) o;
+        return Objects.equals(data, that.data) && Objects.equals(auth, that.auth);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(super.hashCode(), data, auth);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/CredentialsResponse.java

@@ -26,6 +26,7 @@ import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
 public final class CredentialsResponse extends SecretResponse {
+    private static final long serialVersionUID = -1439692963299045425L;
 
     /**
      * @return Username

src/main/java/de/stklcode/jvault/connector/model/response/ErrorResponse.java

@@ -20,6 +20,7 @@ import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
 import java.util.List;
+import java.util.Objects;
 
 /**
  * Vault response in case of errors.
@@ -29,6 +30,8 @@ import java.util.List;
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
 public final class ErrorResponse implements VaultResponse {
+    private static final long serialVersionUID = -6227368087842549149L;
+
     @JsonProperty("errors")
     private List<String> errors;
 
@@ -47,4 +50,20 @@ public final class ErrorResponse implements VaultResponse {
             return errors.get(0);
         }
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        ErrorResponse that = (ErrorResponse) o;
+        return Objects.equals(errors, that.errors);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(errors);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/HealthResponse.java

@@ -19,6 +19,8 @@ package de.stklcode.jvault.connector.model.response;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
+import java.util.Objects;
+
 /**
  * Vault response for health query.
  *
@@ -27,6 +29,8 @@ import com.fasterxml.jackson.annotation.JsonProperty;
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
 public final class HealthResponse implements VaultResponse {
+    private static final long serialVersionUID = 6483840078694294401L;
+
     @JsonProperty("cluster_id")
     private String clusterID;
 
@@ -129,4 +133,30 @@ public final class HealthResponse implements VaultResponse {
     public Boolean isPerformanceStandby() {
         return performanceStandby;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        HealthResponse that = (HealthResponse) o;
+        return Objects.equals(clusterID, that.clusterID) &&
+                Objects.equals(clusterName, that.clusterName) &&
+                Objects.equals(version, that.version) &&
+                Objects.equals(serverTimeUTC, that.serverTimeUTC) &&
+                Objects.equals(standby, that.standby) &&
+                Objects.equals(sealed, that.sealed) &&
+                Objects.equals(initialized, that.initialized) &&
+                Objects.equals(replicationPerfMode, that.replicationPerfMode) &&
+                Objects.equals(replicationDrMode, that.replicationDrMode) &&
+                Objects.equals(performanceStandby, that.performanceStandby);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(clusterID, clusterName, version, serverTimeUTC, standby, sealed, initialized,
+                replicationPerfMode, replicationDrMode, performanceStandby);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/HelpResponse.java

@@ -19,6 +19,8 @@ package de.stklcode.jvault.connector.model.response;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
+import java.util.Objects;
+
 /**
  * Vault response for help request.
  *
@@ -27,6 +29,8 @@ import com.fasterxml.jackson.annotation.JsonProperty;
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
 public final class HelpResponse implements VaultResponse {
+    private static final long serialVersionUID = -1152070966642848490L;
+
     @JsonProperty("help")
     private String help;
 
@@ -36,4 +40,20 @@ public final class HelpResponse implements VaultResponse {
     public String getHelp() {
         return help;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        HelpResponse that = (HelpResponse) o;
+        return Objects.equals(help, that.help);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(help);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/MetadataResponse.java

@@ -23,6 +23,7 @@ import de.stklcode.jvault.connector.model.response.embedded.SecretMetadata;
 
 import java.io.IOException;
 import java.util.Map;
+import java.util.Objects;
 
 /**
  * Vault response for secret metadata (KV v2).
@@ -32,6 +33,7 @@ import java.util.Map;
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
 public class MetadataResponse extends VaultDataResponse {
+    private static final long serialVersionUID = 3407081728744500975L;
 
     private SecretMetadata metadata;
 
@@ -53,4 +55,20 @@ public class MetadataResponse extends VaultDataResponse {
     public SecretMetadata getMetadata() {
         return metadata;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass() || !super.equals(o)) {
+            return false;
+        }
+        MetadataResponse that = (MetadataResponse) o;
+        return Objects.equals(metadata, that.metadata);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(super.hashCode(), metadata);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/RawDataResponse.java

@@ -19,6 +19,7 @@ package de.stklcode.jvault.connector.model.response;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 
 import java.util.Map;
+import java.util.Objects;
 
 /**
  * Simple Vault data response.
@@ -28,6 +29,8 @@ import java.util.Map;
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
 public final class RawDataResponse extends VaultDataResponse {
+    private static final long serialVersionUID = -5494734676257709074L;
+
     private Map<String, Object> data;
 
     @Override
@@ -41,4 +44,20 @@ public final class RawDataResponse extends VaultDataResponse {
     public Map<String, Object> getData() {
         return data;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass() || !super.equals(o)) {
+            return false;
+        }
+        RawDataResponse that = (RawDataResponse) o;
+        return Objects.equals(data, that.data);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(super.hashCode(), data);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/SealResponse.java

@@ -19,6 +19,8 @@ package de.stklcode.jvault.connector.model.response;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
+import java.util.Objects;
+
 /**
  * Vault response for seal status or unseal request.
  *
@@ -27,6 +29,8 @@ import com.fasterxml.jackson.annotation.JsonProperty;
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
 public final class SealResponse implements VaultResponse {
+    private static final long serialVersionUID = -3661916639367542617L;
+
     @JsonProperty("type")
     private String type;
 
@@ -165,4 +169,33 @@ public final class SealResponse implements VaultResponse {
     public String getStorageType() {
         return storageType;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        SealResponse that = (SealResponse) o;
+        return sealed == that.sealed &&
+                initialized == that.initialized &&
+                Objects.equals(type, that.type) &&
+                Objects.equals(threshold, that.threshold) &&
+                Objects.equals(numberOfShares, that.numberOfShares) &&
+                Objects.equals(progress, that.progress) &&
+                Objects.equals(version, that.version) &&
+                Objects.equals(nonce, that.nonce) &&
+                Objects.equals(clusterName, that.clusterName) &&
+                Objects.equals(clusterId, that.clusterId) &&
+                Objects.equals(migration, that.migration) &&
+                Objects.equals(recoverySeal, that.recoverySeal) &&
+                Objects.equals(storageType, that.storageType);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(type, sealed, initialized, threshold, numberOfShares, progress, version, nonce,
+                clusterName, clusterId, migration, recoverySeal, storageType);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/SecretListResponse.java

@@ -22,6 +22,7 @@ import de.stklcode.jvault.connector.exception.InvalidResponseException;
 
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 
 /**
  * Vault response for secret list request.
@@ -31,13 +32,14 @@ import java.util.Map;
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
 public final class SecretListResponse extends VaultDataResponse {
+    private static final long serialVersionUID = -5279146643326713976L;
+
     private List<String> keys;
 
     /**
      * Set data. Extracts list of keys from raw response data.
      *
      * @param data Raw data
-     * @throws InvalidResponseException on parsing errors
      */
     @JsonProperty("data")
     public void setData(final Map<String, Object> data) throws InvalidResponseException {
@@ -54,4 +56,20 @@ public final class SecretListResponse extends VaultDataResponse {
     public List<String> getKeys() {
         return keys;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass() || !super.equals(o)) {
+            return false;
+        }
+        SecretListResponse that = (SecretListResponse) o;
+        return Objects.equals(keys, that.keys);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(super.hashCode(), keys);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/SecretResponse.java

@@ -24,6 +24,7 @@ import de.stklcode.jvault.connector.model.response.embedded.VersionMetadata;
 import java.io.IOException;
 import java.util.Collections;
 import java.util.Map;
+import java.util.Objects;
 
 /**
  * Vault response for secret request.
@@ -33,6 +34,8 @@ import java.util.Map;
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
 public class SecretResponse extends VaultDataResponse {
+    private static final long serialVersionUID = -8215178956885015265L;
+
     private static final String KEY_DATA = "data";
     private static final String KEY_METADATA = "metadata";
 
@@ -116,4 +119,20 @@ public class SecretResponse extends VaultDataResponse {
             throw new InvalidResponseException("Unable to parse response payload: " + e.getMessage());
         }
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass() || !super.equals(o)) {
+            return false;
+        }
+        SecretResponse that = (SecretResponse) o;
+        return Objects.equals(data, that.data) && Objects.equals(metadata, that.metadata);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(super.hashCode(), data, metadata);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/SecretVersionResponse.java

@@ -23,6 +23,7 @@ import de.stklcode.jvault.connector.model.response.embedded.VersionMetadata;
 
 import java.io.IOException;
 import java.util.Map;
+import java.util.Objects;
 
 /**
  * Vault response for a single secret version metadata, i.e. after update (KV v2).
@@ -32,6 +33,7 @@ import java.util.Map;
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
 public class SecretVersionResponse extends VaultDataResponse {
+    private static final long serialVersionUID = -6681638207727120184L;
 
     private VersionMetadata metadata;
 
@@ -53,4 +55,20 @@ public class SecretVersionResponse extends VaultDataResponse {
     public VersionMetadata getMetadata() {
         return metadata;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass() || !super.equals(o)) {
+            return false;
+        }
+        SecretVersionResponse that = (SecretVersionResponse) o;
+        return Objects.equals(metadata, that.metadata);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(super.hashCode(), metadata);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/TokenResponse.java

@@ -24,6 +24,7 @@ import de.stklcode.jvault.connector.model.response.embedded.TokenData;
 
 import java.io.IOException;
 import java.util.Map;
+import java.util.Objects;
 
 /**
  * Vault response from token lookup providing Token information in {@link TokenData} field.
@@ -33,6 +34,8 @@ import java.util.Map;
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
 public final class TokenResponse extends VaultDataResponse {
+    private static final long serialVersionUID = 2248288114849229479L;
+
     private TokenData data;
 
     @JsonProperty("auth")
@@ -60,4 +63,20 @@ public final class TokenResponse extends VaultDataResponse {
     public TokenData getData() {
         return data;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass() || !super.equals(o)) {
+            return false;
+        }
+        TokenResponse that = (TokenResponse) o;
+        return Objects.equals(data, that.data) && Objects.equals(auth, that.auth);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(super.hashCode(), data, auth);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/TokenRoleResponse.java

@@ -24,6 +24,7 @@ import de.stklcode.jvault.connector.model.response.embedded.TokenData;
 
 import java.io.IOException;
 import java.util.Map;
+import java.util.Objects;
 
 /**
  * Vault response from token role lookup providing Token information in {@link TokenData} field.
@@ -33,6 +34,8 @@ import java.util.Map;
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
 public final class TokenRoleResponse extends VaultDataResponse {
+    private static final long serialVersionUID = -6622498881812517596L;
+
     private TokenRole data;
 
     /**
@@ -57,4 +60,20 @@ public final class TokenRoleResponse extends VaultDataResponse {
     public TokenRole getData() {
         return data;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass() || !super.equals(o)) {
+            return false;
+        }
+        TokenRoleResponse that = (TokenRoleResponse) o;
+        return Objects.equals(data, that.data);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(super.hashCode(), data);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/VaultDataResponse.java

@@ -22,6 +22,7 @@ import de.stklcode.jvault.connector.model.response.embedded.WrapInfo;
 
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 
 /**
  * Abstract Vault response with default payload fields.
@@ -30,6 +31,8 @@ import java.util.Map;
  * @since 0.1
  */
 public abstract class VaultDataResponse implements VaultResponse {
+    private static final long serialVersionUID = 2507925101227179499L;
+
     @JsonProperty("lease_id")
     private String leaseId;
 
@@ -89,4 +92,24 @@ public abstract class VaultDataResponse implements VaultResponse {
     public final WrapInfo getWrapInfo() {
         return wrapInfo;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        VaultDataResponse that = (VaultDataResponse) o;
+        return renewable == that.renewable &&
+                Objects.equals(leaseId, that.leaseId) &&
+                Objects.equals(leaseDuration, that.leaseDuration) &&
+                Objects.equals(warnings, that.warnings) &&
+                Objects.equals(wrapInfo, that.wrapInfo);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(leaseId, renewable, leaseDuration, warnings, wrapInfo);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/VaultResponse.java

@@ -16,11 +16,14 @@
 
 package de.stklcode.jvault.connector.model.response;
 
+import java.io.Serializable;
+
 /**
  * Marker interface for responses from Vault backend.
  *
  * @author Stefan Kalscheuer
  * @since 0.1
+ * @since 1.1 extends {@link Serializable}
  */
-public interface VaultResponse {
+public interface VaultResponse extends Serializable {
 }

src/main/java/de/stklcode/jvault/connector/model/response/embedded/AuthData.java

@@ -19,17 +19,22 @@ package de.stklcode.jvault.connector.model.response.embedded;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
+import java.io.Serializable;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 
 /**
  * Embedded authorization information inside Vault response.
  *
  * @author Stefan Kalscheuer
  * @since 0.1
+ * @since 1.1 implements {@link Serializable}
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
-public final class AuthData {
+public final class AuthData implements Serializable {
+    private static final long serialVersionUID = -6962244199229885869L;
+
     @JsonProperty("client_token")
     private String clientToken;
 
@@ -133,4 +138,31 @@ public final class AuthData {
     public boolean isOrphan() {
         return orphan;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        AuthData authData = (AuthData) o;
+        return renewable == authData.renewable &&
+                orphan == authData.orphan &&
+                Objects.equals(clientToken, authData.clientToken) &&
+                Objects.equals(accessor, authData.accessor) &&
+                Objects.equals(policies, authData.policies) &&
+                Objects.equals(tokenPolicies, authData.tokenPolicies) &&
+                Objects.equals(metadata, authData.metadata) &&
+                Objects.equals(leaseDuration, authData.leaseDuration) &&
+                Objects.equals(entityId, authData.entityId) &&
+                Objects.equals(tokenType, authData.tokenType);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(clientToken, accessor, policies, tokenPolicies, metadata, leaseDuration, renewable,
+                entityId, tokenType, orphan);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/embedded/AuthMethod.java

@@ -21,16 +21,21 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import de.stklcode.jvault.connector.model.AuthBackend;
 
+import java.io.Serializable;
 import java.util.Map;
+import java.util.Objects;
 
 /**
  * Embedded authentication method response.
  *
  * @author Stefan Kalscheuer
  * @since 0.1
+ * @since 1.1 implements {@link Serializable}
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
-public final class AuthMethod {
+public final class AuthMethod implements Serializable {
+    private static final long serialVersionUID = -5241997986380823391L;
+
     private AuthBackend type;
     private String rawType;
 
@@ -86,4 +91,24 @@ public final class AuthMethod {
     public boolean isLocal() {
         return local;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        AuthMethod that = (AuthMethod) o;
+        return local == that.local &&
+                type == that.type &&
+                Objects.equals(rawType, that.rawType) &&
+                Objects.equals(description, that.description) &&
+                Objects.equals(config, that.config);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(type, rawType, description, config, local);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/embedded/SecretMetadata.java

@@ -19,19 +19,24 @@ package de.stklcode.jvault.connector.model.response.embedded;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
+import java.io.Serializable;
 import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
 import java.time.format.DateTimeParseException;
 import java.util.Map;
+import java.util.Objects;
 
 /**
  * Embedded metadata for Key-Value v2 secrets.
  *
  * @author Stefan Kalscheuer
  * @since 0.8
+ * @since 1.1 implements {@link Serializable}
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
-public final class SecretMetadata {
+public final class SecretMetadata implements Serializable {
+    private static final long serialVersionUID = 1684891108903409038L;
+
     private static final DateTimeFormatter TIME_FORMAT = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSSSSSSSX");
 
     @JsonProperty("created_time")
@@ -124,4 +129,24 @@ public final class SecretMetadata {
         return versions;
     }
 
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        SecretMetadata that = (SecretMetadata) o;
+        return Objects.equals(createdTimeString, that.createdTimeString) &&
+                Objects.equals(currentVersion, that.currentVersion) &&
+                Objects.equals(maxVersions, that.maxVersions) &&
+                Objects.equals(oldestVersion, that.oldestVersion) &&
+                Objects.equals(updatedTime, that.updatedTime) &&
+                Objects.equals(versions, that.versions);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(createdTimeString, currentVersion, maxVersions, oldestVersion, updatedTime, versions);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/embedded/TokenData.java

@@ -19,18 +19,23 @@ package de.stklcode.jvault.connector.model.response.embedded;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
+import java.io.Serializable;
 import java.time.ZonedDateTime;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 
 /**
  * Embedded token information inside Vault response.
  *
  * @author Stefan Kalscheuer
  * @since 0.1
+ * @since 1.1 implements {@link Serializable}
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
-public final class TokenData {
+public final class TokenData implements Serializable {
+    private static final long serialVersionUID = 2915180734313753649L;
+
     @JsonProperty("accessor")
     private String accessor;
 
@@ -231,4 +236,37 @@ public final class TokenData {
     public Map<String, Object> getMeta() {
         return meta;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        TokenData tokenData = (TokenData) o;
+        return orphan == tokenData.orphan &&
+                renewable == tokenData.renewable &&
+                Objects.equals(accessor, tokenData.accessor) &&
+                Objects.equals(creationTime, tokenData.creationTime) &&
+                Objects.equals(creationTtl, tokenData.creationTtl) &&
+                Objects.equals(name, tokenData.name) &&
+                Objects.equals(entityId, tokenData.entityId) &&
+                Objects.equals(expireTime, tokenData.expireTime) &&
+                Objects.equals(explicitMaxTtl, tokenData.explicitMaxTtl) &&
+                Objects.equals(id, tokenData.id) &&
+                Objects.equals(issueTime, tokenData.issueTime) &&
+                Objects.equals(meta, tokenData.meta) &&
+                Objects.equals(numUses, tokenData.numUses) &&
+                Objects.equals(path, tokenData.path) &&
+                Objects.equals(policies, tokenData.policies) &&
+                Objects.equals(ttl, tokenData.ttl) &&
+                Objects.equals(type, tokenData.type);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(accessor, creationTime, creationTtl, name, entityId, expireTime, explicitMaxTtl, id,
+                issueTime, meta, numUses, orphan, path, policies, renewable, ttl, type);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/embedded/VersionMetadata.java

@@ -19,18 +19,23 @@ package de.stklcode.jvault.connector.model.response.embedded;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
+import java.io.Serializable;
 import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
 import java.time.format.DateTimeParseException;
+import java.util.Objects;
 
 /**
  * Embedded metadata for a single Key-Value v2 version.
  *
  * @author Stefan Kalscheuer
  * @since 0.8
+ * @since 1.1 implements {@link Serializable}
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
-public final class VersionMetadata {
+public final class VersionMetadata implements Serializable {
+    private static final long serialVersionUID = -5286693953873839611L;
+
     private static final DateTimeFormatter TIME_FORMAT = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSSSSSSSX");
 
     @JsonProperty("created_time")
@@ -103,4 +108,22 @@ public final class VersionMetadata {
         return version;
     }
 
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        VersionMetadata that = (VersionMetadata) o;
+        return destroyed == that.destroyed &&
+                Objects.equals(createdTimeString, that.createdTimeString) &&
+                Objects.equals(deletionTimeString, that.deletionTimeString) &&
+                Objects.equals(version, that.version);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(createdTimeString, deletionTimeString, destroyed, version);
+    }
 }

src/main/java/de/stklcode/jvault/connector/model/response/embedded/WrapInfo.java

@@ -18,13 +18,17 @@ package de.stklcode.jvault.connector.model.response.embedded;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 
+import java.io.Serializable;
+import java.util.Objects;
+
 /**
  * Wrapping information object.
  *
  * @author Stefan Kalscheuer
  * @since 1.1
  */
-public class WrapInfo {
+public class WrapInfo implements Serializable {
+    private static final long serialVersionUID = -7764500642913116581L;
 
     @JsonProperty("token")
     private String token;
@@ -65,4 +69,23 @@ public class WrapInfo {
     public String getCreationPath() {
         return creationPath;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        } else if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        WrapInfo that = (WrapInfo) o;
+        return Objects.equals(token, that.token) &&
+                Objects.equals(ttl, that.ttl) &&
+                Objects.equals(creationTime, that.creationTime) &&
+                Objects.equals(creationPath, that.creationPath);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(token, ttl, creationTime, creationPath);
+    }
 }

src/test/java/de/stklcode/jvault/connector/model/AppRoleSecretTest.java

@@ -17,11 +17,10 @@
 package de.stklcode.jvault.connector.model;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
+import nl.jqno.equalsverifier.EqualsVerifier;
 import org.junit.jupiter.api.Test;
 
 import java.lang.reflect.Field;
-import java.util.Arrays;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -37,13 +36,11 @@ import static org.junit.jupiter.api.Assumptions.assumeTrue;
  */
 class AppRoleSecretTest {
     private static final String TEST_ID = "abc123";
-    private static final Map<String, Object> TEST_META = new HashMap<>();
+    private static final Map<String, Object> TEST_META = Map.of(
-    private static final List<String> TEST_CIDR = Arrays.asList("203.0.113.0/24", "198.51.100.0/24");
+            "foo", "bar",
-
+            "number", 1337
-    static {
+    );
-        TEST_META.put("foo", "bar");
+    private static final List<String> TEST_CIDR = List.of("203.0.113.0/24", "198.51.100.0/24");
-        TEST_META.put("number", 1337);
-    }
 
     /**
      * Test constructors.
@@ -167,7 +164,11 @@ class AppRoleSecretTest {
         assertEquals("TEST_LASTUPDATE", secret2.getLastUpdatedTime());
         assertEquals(678, secret2.getNumUses());
         assertEquals(12345, secret2.getTtl());
+    }
 
+    @Test
+    void testEqualsHashcode() {
+        EqualsVerifier.simple().forClass(AppRoleSecret.class).verify();
     }
 
     private static void setPrivateField(Object object, String fieldName, Object value) throws NoSuchFieldException, IllegalAccessException {
@@ -182,5 +183,4 @@ class AppRoleSecretTest {
         return json.replaceAll("\"cidr_list\":\"([^\"]*)\"", "\"cidr_list\":\\[$1\\]")
                 .replaceAll("(\\d+\\.\\d+\\.\\d+\\.\\d+/\\d+)", "\"$1\"");
     }
-
 }

src/test/java/de/stklcode/jvault/connector/model/AppRoleTest.java

@@ -18,6 +18,7 @@ package de.stklcode.jvault.connector.model;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import nl.jqno.equalsverifier.EqualsVerifier;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 
@@ -172,4 +173,9 @@ class AppRoleTest {
         assertEquals(2, role.getTokenPolicies().size());
         assertTrue(role.getTokenPolicies().containsAll(List.of(POLICY, POLICY_2)));
     }
+
+    @Test
+    void testEqualsHashcode() {
+        EqualsVerifier.simple().forClass(AppRole.class).verify();
+    }
 }

src/test/java/de/stklcode/jvault/connector/model/TokenRoleTest.java

@@ -18,6 +18,7 @@ package de.stklcode.jvault.connector.model;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import nl.jqno.equalsverifier.EqualsVerifier;
 import org.junit.jupiter.api.Test;
 
 import java.util.Arrays;
@@ -26,12 +27,12 @@ import java.util.List;
 import static org.junit.jupiter.api.Assertions.*;
 
 /**
- * Unit Test for {@link Token.Builder}
+ * Unit Test for {@link TokenRole} and {@link TokenRole.Builder}.
  *
  * @author Stefan Kalscheuer
  * @since 0.9
  */
-class TokenRoleBuilderTest {
+class TokenRoleTest {
     private static final String NAME = "test-role";
     private static final String ALLOWED_POLICY_1 = "apol-1";
     private static final String ALLOWED_POLICY_2 = "apol-2";
@@ -132,6 +133,9 @@ class TokenRoleBuilderTest {
         assertNull(role.getTokenPeriod());
         assertNull(role.getTokenType());
 
+        // Empty builder should be equal to no-arg construction.
+        assertEquals(role, new TokenRole());
+
         // Optional fields should be ignored, so JSON string should be empty.
         assertEquals("{}", new ObjectMapper().writeValueAsString(role));
     }
@@ -180,4 +184,9 @@ class TokenRoleBuilderTest {
         // Verify that all parameters are included in JSON string.
         assertEquals(JSON_FULL, new ObjectMapper().writeValueAsString(role));
     }
+
+    @Test
+    void testEqualsHashcode() {
+        EqualsVerifier.simple().forClass(TokenRole.class).verify();
+    }
 }

src/test/java/de/stklcode/jvault/connector/model/TokenTest.java

@@ -18,6 +18,7 @@ package de.stklcode.jvault.connector.model;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import nl.jqno.equalsverifier.EqualsVerifier;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 
@@ -81,6 +82,9 @@ class TokenTest {
 
         // Optional fields should be ignored, so JSON string should be empty.
         assertEquals("{}", new ObjectMapper().writeValueAsString(token));
+
+        // Empty builder should be equal to no-arg construction.
+        assertEquals(token, new Token());
     }
 
     /**
@@ -167,4 +171,9 @@ class TokenTest {
         assertEquals(META_VALUE, token.getMeta().get(META_KEY));
         assertEquals(META_VALUE_2, token.getMeta().get(META_KEY_2));
     }
+
+    @Test
+    void testEqualsHashcode() {
+        EqualsVerifier.simple().forClass(Token.class).verify();
+    }
 }

src/test/java/de/stklcode/jvault/connector/model/response/AppRoleResponseTest.java

@@ -19,9 +19,9 @@ package de.stklcode.jvault.connector.model.response;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import de.stklcode.jvault.connector.exception.InvalidResponseException;
 import de.stklcode.jvault.connector.model.AppRole;
+import nl.jqno.equalsverifier.EqualsVerifier;
 import org.junit.jupiter.api.Test;
 
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -63,11 +63,7 @@ class AppRoleResponseTest {
             "  \"lease_id\": \"\"\n" +
             "}";
 
-    private static final Map<String, Object> INVALID_DATA = new HashMap<>();
+    private static final Map<String, Object> INVALID_DATA = Map.of("token_policies", "fancy-policy");
-
-    static {
-        INVALID_DATA.put("token_policies", "fancy-policy");
-    }
 
     /**
      * Test getter, setter and get-methods for response data.
@@ -109,4 +105,9 @@ class AppRoleResponseTest {
         assertNull(role.getTokenBoundCidrs(), "Incorrect bound CIDR list");
         assertEquals("", role.getTokenBoundCidrsString(), "Incorrect bound CIDR list string");
     }
+
+    @Test
+    void testEqualsHashcode() {
+        EqualsVerifier.simple().forClass(AppRoleResponse.class).verify();
+    }
 }

src/test/java/de/stklcode/jvault/connector/model/response/AuthMethodsResponseTest.java

@@ -20,10 +20,11 @@ import com.fasterxml.jackson.databind.ObjectMapper;
 import de.stklcode.jvault.connector.exception.InvalidResponseException;
 import de.stklcode.jvault.connector.model.AuthBackend;
 import de.stklcode.jvault.connector.model.response.embedded.AuthMethod;
+import nl.jqno.equalsverifier.EqualsVerifier;
 import org.junit.jupiter.api.Test;
 
+import java.io.Serializable;
 import java.util.Collections;
-import java.util.HashMap;
 import java.util.Map;
 import java.util.Set;
 
@@ -62,11 +63,7 @@ class AuthMethodsResponseTest {
             "  }\n" +
             "}";
 
-    private static final Map<String, Object> INVALID_DATA = new HashMap<>();
+    private static final Map<String, Object> INVALID_DATA = Map.of("dummy/", new Dummy());
-
-    static {
-        INVALID_DATA.put("dummy/", new Dummy());
-    }
 
     /**
      * Test getter, setter and get-methods for response data.
@@ -119,7 +116,12 @@ class AuthMethodsResponseTest {
         assertEquals(TK_MAX_LEASE_TTL.toString(), method.getConfig().get("max_lease_ttl"), "Incorrect max lease TTL config");
     }
 
-    private static class Dummy {
+    @Test
+    void testEqualsHashcode() {
+        EqualsVerifier.simple().forClass(AuthMethodsResponse.class).verify();
+    }
 
+    private static class Dummy implements Serializable {
+        private static final long serialVersionUID = 9075949348402246139L;
     }
 }

src/test/java/de/stklcode/jvault/connector/model/response/AuthResponseTest.java

@@ -19,9 +19,9 @@ package de.stklcode.jvault.connector.model.response;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import de.stklcode.jvault.connector.exception.InvalidResponseException;
 import de.stklcode.jvault.connector.model.response.embedded.AuthData;
+import nl.jqno.equalsverifier.EqualsVerifier;
 import org.junit.jupiter.api.Test;
 
-import java.util.HashMap;
 import java.util.Map;
 import java.util.Set;
 
@@ -69,11 +69,7 @@ class AuthResponseTest {
             "  }\n" +
             "}";
 
-    private static final Map<String, Object> INVALID_AUTH_DATA = new HashMap<>();
+    private static final Map<String, Object> INVALID_AUTH_DATA = Map.of("policies", "fancy-policy");
-
-    static {
-        INVALID_AUTH_DATA.put("policies", "fancy-policy");
-    }
 
     /**
      * Test getter, setter and get-methods for response data.
@@ -122,4 +118,9 @@ class AuthResponseTest {
         assertTrue(data.getTokenPolicies().containsAll(Set.of(AUTH_POLICY_2, AUTH_POLICY_1)), "Incorrect token policies");
         assertEquals(Map.of(AUTH_META_KEY, AUTH_META_VALUE), data.getMetadata(), "Incorrect auth metadata");
     }
+
+    @Test
+    void testEqualsHashcode() {
+        EqualsVerifier.simple().forClass(AuthResponse.class).verify();
+    }
 }

src/test/java/de/stklcode/jvault/connector/model/response/CredentialsResponseTest.java

@@ -17,9 +17,9 @@
 package de.stklcode.jvault.connector.model.response;
 
 import de.stklcode.jvault.connector.exception.InvalidResponseException;
+import nl.jqno.equalsverifier.EqualsVerifier;
 import org.junit.jupiter.api.Test;
 
-import java.util.HashMap;
 import java.util.Map;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -32,14 +32,12 @@ import static org.junit.jupiter.api.Assertions.assertNull;
  * @since 0.8
  */
 class CredentialsResponseTest {
-    private static final Map<String, Object> DATA = new HashMap<>();
     private static final String VAL_USER = "testUserName";
     private static final String VAL_PASS = "5up3r5ecr3tP455";
-
+    private static final Map<String, Object> DATA = Map.of(
-    static {
+            "username", VAL_USER,
-        DATA.put("username", VAL_USER);
+            "password", VAL_PASS
-        DATA.put("password", VAL_PASS);
+    );
-    }
 
     /**
      * Test getter, setter and get-methods for response data.
@@ -47,7 +45,6 @@ class CredentialsResponseTest {
      * @throws InvalidResponseException Should not occur
      */
     @Test
-    @SuppressWarnings("unchecked")
     void getCredentialsTest() throws InvalidResponseException {
         // Create empty Object.
         CredentialsResponse res = new CredentialsResponse();
@@ -59,4 +56,9 @@ class CredentialsResponseTest {
         assertEquals(VAL_USER, res.getUsername(), "Incorrect username");
         assertEquals(VAL_PASS, res.getPassword(), "Incorrect password");
     }
+
+    @Test
+    void testEqualsHashcode() {
+        EqualsVerifier.simple().forClass(CredentialsResponse.class).verify();
+    }
 }

src/test/java/de/stklcode/jvault/connector/model/response/ErrorResponseTest.java

@@ -0,0 +1,80 @@
+/*
+ * Copyright 2016-2021 Stefan Kalscheuer
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package de.stklcode.jvault.connector.model.response;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import nl.jqno.equalsverifier.EqualsVerifier;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * JUnit Test for {@link ErrorResponse} model.
+ *
+ * @author Stefan Kalscheuer
+ */
+class ErrorResponseTest {
+    private static final String ERROR_1 = "Error #1";
+    private static final String ERROR_2 = "Error #2";
+
+    private static final String JSON = "{\"errors\":[\"" + ERROR_1 + "\",\"" + ERROR_2 + "\"]}";
+    private static final String JSON_EMPTY = "{\"errors\":[]}";
+
+    /**
+     * Test creation from JSON value as returned by Vault.
+     */
+    @Test
+    void jsonRoundtrip() {
+        ObjectMapper om = new ObjectMapper();
+        ErrorResponse res = assertDoesNotThrow(
+                () -> om.readValue(JSON, ErrorResponse.class),
+                "ErrorResponse deserialization failed"
+        );
+        assertNotNull(res, "Parsed response is NULL");
+        assertEquals(List.of(ERROR_1, ERROR_2), res.getErrors(), "Unexpected error messages");
+        assertEquals(
+                JSON,
+                assertDoesNotThrow(() -> om.writeValueAsString(res), "ErrorResponse serialization failed"),
+                "Unexpected JSON string after serialization"
+        );
+    }
+
+
+    @Test
+    void testToString() {
+        ErrorResponse res = assertDoesNotThrow(
+                () -> new ObjectMapper().readValue(JSON, ErrorResponse.class),
+                "ErrorResponse deserialization failed"
+        );
+        assertEquals(ERROR_1, res.toString());
+
+        res = assertDoesNotThrow(
+                () -> new ObjectMapper().readValue(JSON_EMPTY, ErrorResponse.class),
+                "ErrorResponse deserialization failed with empty list"
+        );
+        assertEquals("error response", res.toString());
+
+        assertEquals("error response", new ErrorResponse().toString());
+    }
+
+    @Test
+    void testEqualsHashcode() {
+        EqualsVerifier.simple().forClass(ErrorResponse.class).verify();
+    }
+}

src/test/java/de/stklcode/jvault/connector/model/response/HealthResponseTest.java

@@ -17,6 +17,7 @@
 package de.stklcode.jvault.connector.model.response;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
+import nl.jqno.equalsverifier.EqualsVerifier;
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.*;
@@ -73,4 +74,9 @@ class HealthResponseTest {
         assertEquals(REPL_PERF_MODE, res.getReplicationPerfMode(), "Incorrect replication perf mode");
         assertEquals(REPL_DR_MODE, res.getReplicationDrMode(), "Incorrect replication DR mode");
     }
+
+    @Test
+    void testEqualsHashcode() {
+        EqualsVerifier.simple().forClass(HealthResponse.class).verify();
+    }
 }

src/test/java/de/stklcode/jvault/connector/model/response/HelpResponseTest.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright 2016-2021 Stefan Kalscheuer
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package de.stklcode.jvault.connector.model.response;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import nl.jqno.equalsverifier.EqualsVerifier;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * JUnit Test for {@link HelpResponse} model.
+ *
+ * @author Stefan Kalscheuer
+ */
+class HelpResponseTest {
+    private static final String HELP = "Help Text.";
+
+    private static final String JSON = "{\"help\":\"" + HELP + "\"}";
+
+    /**
+     * Test creation from JSON value as returned by Vault.
+     */
+    @Test
+    void jsonRoundtrip() {
+        ObjectMapper om = new ObjectMapper();
+        HelpResponse res = assertDoesNotThrow(
+                () -> om.readValue(JSON, HelpResponse.class),
+                "HelpResponse deserialization failed"
+        );
+        assertNotNull(res, "Parsed response is NULL");
+        assertEquals(HELP, res.getHelp(), "Unexpected help text");
+        assertEquals(
+                JSON,
+                assertDoesNotThrow(() -> om.writeValueAsString(res), "HelpResponse serialization failed"),
+                "Unexpected JSON string after serialization"
+        );
+    }
+
+    @Test
+    void testEqualsHashcode() {
+        EqualsVerifier.simple().forClass(HelpResponse.class).verify();
+    }
+}

src/test/java/de/stklcode/jvault/connector/model/response/MetadataResponseTest.java

@@ -17,6 +17,7 @@
 package de.stklcode.jvault.connector.model.response;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
+import nl.jqno.equalsverifier.EqualsVerifier;
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.*;
@@ -88,4 +89,9 @@ class MetadataResponseTest {
         assertNotNull(res.getMetadata().getVersions().get(2).getCreatedTime(), "Parsing version created failed");
         assertFalse(res.getMetadata().getVersions().get(3).isDestroyed(), "Incorrect version 3 destroyed state");
     }
+
+    @Test
+    void testEqualsHashcode() {
+        EqualsVerifier.simple().forClass(MetadataResponse.class).verify();
+    }
 }

src/test/java/de/stklcode/jvault/connector/model/response/SealResponseTest.java

@@ -17,6 +17,7 @@
 package de.stklcode.jvault.connector.model.response;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
+import nl.jqno.equalsverifier.EqualsVerifier;
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.*;
@@ -79,7 +80,7 @@ class SealResponseTest {
         // First test sealed Vault's response.
         SealResponse res = assertDoesNotThrow(
                 () -> new ObjectMapper().readValue(RES_SEALED, SealResponse.class),
-                "TokenResponse deserialization failed"
+                "SealResponse deserialization failed"
         );
         assertNotNull(res, "Parsed response is NULL");
         assertEquals(TYPE, res.getType(), "Incorrect seal type");
@@ -101,7 +102,7 @@ class SealResponseTest {
         // Not test unsealed Vault's response.
         res = assertDoesNotThrow(
                 () -> new ObjectMapper().readValue(RES_UNSEALED, SealResponse.class),
-                "TokenResponse deserialization failed"
+                "SealResponse deserialization failed"
         );
         assertNotNull(res, "Parsed response is NULL");
         assertEquals(TYPE, res.getType(), "Incorrect seal type");
@@ -118,4 +119,9 @@ class SealResponseTest {
         assertEquals(RECOVERY_SEAL, res.getRecoverySeal(), "Incorrect recovery seal");
         assertEquals(STORAGE_TYPE, res.getStorageType(), "Incorrect storage type");
     }
+
+    @Test
+    void testEqualsHashcode() {
+        EqualsVerifier.simple().forClass(SealResponse.class).verify();
+    }
 }

src/test/java/de/stklcode/jvault/connector/model/response/SecretListResponseTest.java

@@ -17,9 +17,13 @@
 package de.stklcode.jvault.connector.model.response;
 
 import de.stklcode.jvault.connector.exception.InvalidResponseException;
+import nl.jqno.equalsverifier.EqualsVerifier;
 import org.junit.jupiter.api.Test;
 
-import java.util.*;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
 
 import static org.junit.jupiter.api.Assertions.*;
 
@@ -30,14 +34,10 @@ import static org.junit.jupiter.api.Assertions.*;
  * @since 0.8
  */
 class SecretListResponseTest {
-    private static final Map<String, Object> DATA = new HashMap<>();
     private static final String KEY1 = "key1";
     private static final String KEY2 = "key-2";
     private static final List<String> KEYS = Arrays.asList(KEY1, KEY2);
-
+    private static final Map<String, Object> DATA = Map.of("keys", KEYS);
-    static {
-        DATA.put("keys", KEYS);
-    }
 
     /**
      * Test getter, setter and get-methods for response data.
@@ -51,8 +51,7 @@ class SecretListResponseTest {
         assertNull(res.getKeys(), "Keys should be null without initialization");
 
         // Provoke internal ClassCastException.
-        Map<String, Object> invalidData = new HashMap<>();
+        Map<String, Object> invalidData = Map.of("keys", "some string");
-        invalidData.put("keys", "some string");
         assertThrows(
                 InvalidResponseException.class,
                 () -> res.setData(invalidData),
@@ -65,4 +64,9 @@ class SecretListResponseTest {
         assertEquals(2, res.getKeys().size(), "Unexpected number of keys");
         assertTrue(res.getKeys().containsAll(Set.of(KEY1, KEY2)), "Unexpected keys");
     }
+
+    @Test
+    void testEqualsHashcode() {
+        EqualsVerifier.simple().forClass(SecretListResponse.class).verify();
+    }
 }

src/test/java/de/stklcode/jvault/connector/model/response/SecretResponseTest.java

@@ -18,9 +18,9 @@ package de.stklcode.jvault.connector.model.response;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 import de.stklcode.jvault.connector.exception.InvalidResponseException;
+import nl.jqno.equalsverifier.EqualsVerifier;
 import org.junit.jupiter.api.Test;
 
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -34,7 +34,6 @@ import static org.junit.jupiter.api.Assertions.*;
  * @since 0.6.2
  */
 class SecretResponseTest {
-    private static final Map<String, Object> DATA = new HashMap<>();
     private static final String KEY_UNKNOWN = "unknown";
     private static final String KEY_STRING = "test1";
     private static final String VAL_STRING = "testvalue";
@@ -43,6 +42,12 @@ class SecretResponseTest {
     private static final String KEY_LIST = "list";
     private static final String VAL_LIST = "[\"first\",\"second\"]";
 
+    private static final Map<String, Object> DATA = Map.of(
+            KEY_STRING, VAL_STRING,
+            KEY_INTEGER, VAL_INTEGER,
+            KEY_LIST, VAL_LIST
+    );
+
     private static final String SECRET_REQUEST_ID = "68315073-6658-e3ff-2da7-67939fb91bbd";
     private static final String SECRET_LEASE_ID = "";
     private static final Integer SECRET_LEASE_DURATION = 2764800;
@@ -104,13 +109,6 @@ class SecretResponseTest {
             "    \"warnings\": " + SECRET_WARNINGS + "\n" +
             "}";
 
-
-    static {
-        DATA.put(KEY_STRING, VAL_STRING);
-        DATA.put(KEY_INTEGER, VAL_INTEGER);
-        DATA.put(KEY_LIST, VAL_LIST);
-    }
-
     /**
      * Test getter, setter and get-methods for response data.
      *
@@ -171,7 +169,7 @@ class SecretResponseTest {
         assertNotNull(res.getMetadata().getCreatedTime(), "Creation date parsing failed");
         assertEquals("", res.getMetadata().getDeletionTimeString(), "Incorrect deletion date string");
         assertNull(res.getMetadata().getDeletionTime(), "Incorrect deletion date");
-        assertEquals(false, res.getMetadata().isDestroyed(), "Secret destroyed when not expected");
+        assertFalse(res.getMetadata().isDestroyed(), "Secret destroyed when not expected");
         assertEquals(1, res.getMetadata().getVersion(), "Incorrect secret version");
 
         // Deleted KV v2 secret.
@@ -185,10 +183,15 @@ class SecretResponseTest {
         assertNotNull(res.getMetadata().getCreatedTime(), "Creation date parsing failed");
         assertEquals(SECRET_META_DELETED, res.getMetadata().getDeletionTimeString(), "Incorrect deletion date string");
         assertNotNull(res.getMetadata().getDeletionTime(), "Incorrect deletion date");
-        assertEquals(true, res.getMetadata().isDestroyed(), "Secret destroyed when not expected");
+        assertTrue(res.getMetadata().isDestroyed(), "Secret destroyed when not expected");
         assertEquals(2, res.getMetadata().getVersion(), "Incorrect secret version");
     }
 
+    @Test
+    void testEqualsHashcode() {
+        EqualsVerifier.simple().forClass(SecretResponse.class).verify();
+    }
+
     private void assertSecretData(SecretResponse res) {
         assertNotNull(res, "Parsed response is NULL");
         assertEquals(SECRET_LEASE_ID, res.getLeaseId(), "Incorrect lease ID");

src/test/java/de/stklcode/jvault/connector/model/response/SecretVersionResponseTest.java

@@ -17,6 +17,7 @@
 package de.stklcode.jvault.connector.model.response;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
+import nl.jqno.equalsverifier.EqualsVerifier;
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.*;
@@ -54,7 +55,12 @@ class SecretVersionResponseTest {
         assertNotNull(res.getMetadata(), "Parsed metadata is NULL");
         assertEquals(CREATION_TIME, res.getMetadata().getCreatedTimeString(), "Incorrect created time");
         assertEquals(DELETION_TIME, res.getMetadata().getDeletionTimeString(), "Incorrect deletion time");
-        assertEquals(false, res.getMetadata().isDestroyed(), "Incorrect destroyed state");
+        assertFalse(res.getMetadata().isDestroyed(), "Incorrect destroyed state");
         assertEquals(VERSION, res.getMetadata().getVersion(), "Incorrect version");
     }
+
+    @Test
+    void testEqualsHashcode() {
+        EqualsVerifier.simple().forClass(SecretVersionResponse.class).verify();
+    }
 }

src/test/java/de/stklcode/jvault/connector/model/response/TokenResponseTest.java

@@ -19,10 +19,10 @@ package de.stklcode.jvault.connector.model.response;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import de.stklcode.jvault.connector.exception.InvalidResponseException;
 import de.stklcode.jvault.connector.model.response.embedded.TokenData;
+import nl.jqno.equalsverifier.EqualsVerifier;
 import org.junit.jupiter.api.Test;
 
 import java.time.ZonedDateTime;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -89,11 +89,7 @@ class TokenResponseTest {
             "  \"auth\": null\n" +
             "}";
 
-    private static final Map<String, Object> INVALID_TOKEN_DATA = new HashMap<>();
+    private static final Map<String, Object> INVALID_TOKEN_DATA = Map.of("num_uses", "fourtytwo");
-
-    static {
-        INVALID_TOKEN_DATA.put("num_uses", "fourtytwo");
-    }
 
     /**
      * Test getter, setter and get-methods for response data.
@@ -149,4 +145,9 @@ class TokenResponseTest {
         assertEquals(RES_TTL, data.getTtl(), "Incorrect token TTL");
         assertEquals(TOKEN_TYPE, data.getType(), "Incorrect token type");
     }
+
+    @Test
+    void testEqualsHashcode() {
+        EqualsVerifier.simple().forClass(TokenResponse.class).verify();
+    }
 }