introduce asynchronous data retrieval

The client now offers getTripsAsync(), getStopsAsync() and
getMessagesAsync() that return a Future of the requested objects. The
synchronous methods are still present, but only wrap the new ones
internally.

.drone.yml

@@ -4,7 +4,7 @@ name: java11
 
 steps:
   - name: test
-    image: maven:3-eclipse-temurin-11
+    image: maven:3-openjdk-11
     commands:
       - mvn -B clean test
 
@@ -15,17 +15,6 @@ name: java17
 
 steps:
   - name: test
-    image: maven:3-eclipse-temurin-17
+    image: maven:3-openjdk-17
-    commands:
-      - mvn -B clean test
-
----
-kind: pipeline
-type: docker
-name: java20
-
-steps:
-  - name: test
-    image: maven:3-eclipse-temurin-20
     commands:
       - mvn -B clean test

.github/workflows/ci.yml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        jdk: [ 11, 17, 20 ]
+        jdk: [ 11, 17 ]
         include:
           - jdk: 11
             analysis: true
@@ -22,11 +22,12 @@ jobs:
       - name: Test
         run: mvn -B -P coverage clean verify
       - name: Analysis
-        if: matrix.analysis
+        if: matrix.analysis && github.event_name == 'push'
         run: >
           mvn -B sonar:sonar
           -Dsonar.host.url=https://sonarcloud.io
           -Dsonar.organization=stklcode-github
+          -Dsonar.login=$SONAR_TOKEN
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}

CHANGELOG.md

@@ -1,23 +1,10 @@
 # Changelog
 All notable changes to this project will be documented in this file.
 
-## 2.0.5 - 2023-10-03
+## unreleased
-### Dependencies
-* Updated Jackson dependency to 2.15.2
 
-### Misc
+### Features
-* Tested with JDK 20
+* New methods for asynchronous trip, stop and message retrieval (#15)
-
-
-## 2.0.4 - 2022-11-21
-### Security
-* Updated Jackson dependency to 2.14.0
-
-### Fixed
-* Querying trips and messages with limit directly from `Query` instance (#18)
-
-### Misc
-* Tested with JDK 19
 
 
 ## 2.0.3 - 2022-08-30

README.md

@@ -57,13 +57,13 @@ List<Stop> stops = ura.forPosition(51.51009, -0.1345734, 200)
 
 ```java
 // Get next 10 trips for given stops and lines in a single direction (all filters optional)
-List<Trip> trips = ura.forStops("100000")
+List<Trip> trips = ura.forStop("100000")
                       .forLines("25", "35")
                       .forDirection(1)
                       .getTrips(10);
 
 // Get trips from given stop towards your destination
-List<Trip> trips = ura.forStopsByName("Piccadilly Circus")
+List<Trip> trips = ura.forStopByName("Piccadilly Circus")
                       .towards("Marble Arch")
                       .getTrips();
 ```
@@ -72,7 +72,7 @@ List<Trip> trips = ura.forStopsByName("Piccadilly Circus")
 
 ```java
 // Get next 10 trips for given stops and lines in a single direction (all filters optional)
-List<Message> msgs = ura.forStops("100000")
+List<Message> msgs = ura.forStop("100000")
                         .getMessages();
 ```
 
@@ -81,7 +81,7 @@ List<Message> msgs = ura.forStops("100000")
 <dependency>
     <groupId>de.stklcode.pubtrans</groupId>
     <artifactId>juraclient</artifactId>
-    <version>2.0.5</version>
+    <version>2.0.2</version>
 </dependency>
 ```
 

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>de.stklcode.pubtrans</groupId>
     <artifactId>juraclient</artifactId>
-    <version>2.0.5</version>
+    <version>2.1.0-SNAPSHOT</version>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -50,13 +50,13 @@
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
-            <version>2.15.2</version>
+            <version>2.13.3</version>
         </dependency>
 
         <dependency>
             <groupId>org.junit.jupiter</groupId>
             <artifactId>junit-jupiter</artifactId>
-            <version>5.10.0</version>
+            <version>5.9.0</version>
             <scope>test</scope>
         </dependency>
         <dependency>
@@ -66,9 +66,9 @@
             <scope>test</scope>
         </dependency>
         <dependency>
-            <groupId>org.wiremock</groupId>
+            <groupId>com.github.tomakehurst</groupId>
-            <artifactId>wiremock</artifactId>
+            <artifactId>wiremock-jre8</artifactId>
-            <version>3.2.0</version>
+            <version>2.33.2</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
@@ -78,7 +78,7 @@
             <dependency>
                 <groupId>org.sonarsource.scanner.maven</groupId>
                 <artifactId>sonar-maven-plugin</artifactId>
-                <version>3.10.0.2594</version>
+                <version>3.9.1.2184</version>
             </dependency>
         </dependencies>
     </dependencyManagement>
@@ -88,7 +88,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.11.0</version>
+                <version>3.10.1</version>
                 <configuration>
                     <release>11</release>
                     <source>11</source>
@@ -98,13 +98,9 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jar-plugin</artifactId>
-                <version>3.3.0</version>
+                <version>3.2.2</version>
                 <configuration>
                     <archive>
-                        <manifest>
-                            <addClasspath>true</addClasspath>
-                            <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
-                        </manifest>
                         <manifestEntries>
                             <Automatic-Module-Name>de.stklcode.pubtrans.juraclient</Automatic-Module-Name>
                         </manifestEntries>
@@ -114,7 +110,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>3.1.2</version>
+                <version>2.22.2</version>
             </plugin>
         </plugins>
     </build>
@@ -127,7 +123,7 @@
                     <plugin>
                         <groupId>org.jacoco</groupId>
                         <artifactId>jacoco-maven-plugin</artifactId>
-                        <version>0.8.10</version>
+                        <version>0.8.8</version>
                         <executions>
                             <execution>
                                 <id>prepare-agent</id>
@@ -158,7 +154,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-source-plugin</artifactId>
-                        <version>3.3.0</version>
+                        <version>3.2.1</version>
                         <executions>
                             <execution>
                                 <id>attach-sources</id>
@@ -182,7 +178,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-javadoc-plugin</artifactId>
-                        <version>3.6.0</version>
+                        <version>3.4.1</version>
                         <configuration>
                             <overview>${basedir}/src/main/javadoc/overview.html</overview>
                             <source>11</source>
@@ -207,7 +203,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-gpg-plugin</artifactId>
-                        <version>3.1.0</version>
+                        <version>3.0.1</version>
                         <executions>
                             <execution>
                                 <id>sign-artifacts</id>

src/main/java/de/stklcode/pubtrans/ura/UraClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 Stefan Kalscheuer
+ * 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.
@@ -17,6 +17,7 @@
 package de.stklcode.pubtrans.ura;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
+import de.stklcode.pubtrans.ura.exception.AsyncUraClientException;
 import de.stklcode.pubtrans.ura.exception.UraClientConfigurationException;
 import de.stklcode.pubtrans.ura.exception.UraClientException;
 import de.stklcode.pubtrans.ura.model.Message;
@@ -33,6 +34,8 @@ import java.net.http.HttpResponse;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionException;
 import java.util.function.Consumer;
 
 import static java.nio.charset.StandardCharsets.UTF_8;
@@ -225,7 +228,7 @@ public class UraClient implements Serializable {
 
     /**
      * Get list of trips with limit.
-     * If {@link #forStops(String...)} and/or {@link #forLines(String...)} has been called, those will be used as filter.
+     * If forStops() and/or forLines() has been called, those will be used as filter.
      *
      * @param limit Maximum number of results.
      * @return List of trips.
@@ -244,7 +247,6 @@ public class UraClient implements Serializable {
      * @param query The query.
      * @return List of trips.
      * @throws UraClientException Error with API communication.
-     * @throws UraClientException Error with API communication.
      * @since 1.0
      * @since 2.0 Throws {@link UraClientException}.
      */
@@ -263,27 +265,84 @@ public class UraClient implements Serializable {
      * @since 2.0 Throws {@link UraClientException}.
      */
     public List<Trip> getTrips(final Query query, final Integer limit) throws UraClientException {
-        List<Trip> trips = new ArrayList<>();
+        try {
-        try (InputStream is = requestInstant(REQUEST_TRIP, query);
+            return getTripsAsync(query, limit).join();
-             BufferedReader br = new BufferedReader(new InputStreamReader(is))) {
+        } catch (CompletionException e) {
-            String version = null;
+            if (e.getCause() instanceof AsyncUraClientException) {
-            String line = br.readLine();
+                throw new UraClientException((AsyncUraClientException) e.getCause());
-            while (line != null && (limit == null || trips.size() < limit)) {
+            } else {
-                List<Serializable> l = mapper.readValue(line, mapper.getTypeFactory().constructCollectionType(List.class, Serializable.class));
+                throw new UraClientException("Asynchronous trip request failed to complete", e.getCause());
-                /* Check if result exists and has correct response type */
-                if (l != null && !l.isEmpty()) {
-                    if (l.get(0).equals(RES_TYPE_URA_VERSION)) {
-                        version = l.get(1).toString();
-                    } else if (l.get(0).equals(RES_TYPE_PREDICTION)) {
-                        trips.add(new Trip(l, version));
-                    }
-                }
-                line = br.readLine();
             }
-        } catch (IOException e) {
-            throw new UraClientException("Failed to read trips from API", e);
         }
-        return trips;
+    }
+
+    /**
+     * Get list of trips asynchronously.
+     * If forStops() and/or forLines() has been called, those will be used as filter.
+     *
+     * @return List of trips.
+     * @since 2.1
+     */
+    public CompletableFuture<List<Trip>> getTripsAsync() {
+        return getTripsAsync(new Query(), null);
+    }
+
+    /**
+     * Get list of trips with limit asynchronously.
+     * If forStops() and/or forLines() has been called, those will be used as filter.
+     *
+     * @param limit Maximum number of results.
+     * @return List of trips.
+     * @since 2.1
+     */
+    public CompletableFuture<List<Trip>> getTripsAsync(final Integer limit) {
+        return getTripsAsync(new Query(), limit);
+    }
+
+    /**
+     * Get list of trips asynchronously.
+     * If forStops() and/or forLines() has been called, those will be used as filter.
+     *
+     * @param query The query.
+     * @return List of trips.
+     * @since 2.1
+     */
+    public CompletableFuture<List<Trip>> getTripsAsync(final Query query) {
+        return getTripsAsync(query, null);
+    }
+
+    /**
+     * Get list of trips for given stopIDs and lineIDs with result limit asynchronously.
+     *
+     * @param query The query.
+     * @param limit Maximum number of results.
+     * @return List of trips.
+     * @since 2.1
+     */
+    public CompletableFuture<List<Trip>> getTripsAsync(final Query query, final Integer limit) {
+        return requestInstantAsync(REQUEST_TRIP, query).thenApply(is -> {
+            List<Trip> trips = new ArrayList<>();
+            try (is; BufferedReader br = new BufferedReader(new InputStreamReader(is))) {
+                String version = null;
+                String line = br.readLine();
+                while (line != null && (limit == null || trips.size() < limit)) {
+                    List<Serializable> l = mapper.readValue(line, mapper.getTypeFactory().constructCollectionType(List.class, Serializable.class));
+                    /* Check if result exists and has correct response type */
+                    if (l != null && !l.isEmpty()) {
+                        if (l.get(0).equals(RES_TYPE_URA_VERSION)) {
+                            version = l.get(1).toString();
+                        } else if (l.get(0).equals(RES_TYPE_PREDICTION)) {
+                            trips.add(new Trip(l, version));
+                        }
+                    }
+                    line = br.readLine();
+                }
+            } catch (IOException e) {
+                throw new AsyncUraClientException("Failed to read trips from API", e);
+            }
+
+            return trips;
+        });
     }
 
     /**
@@ -342,7 +401,7 @@ public class UraClient implements Serializable {
 
     /**
      * List available stopIDs.
-     * If {@link #forStops(String...)} and/or {@link #forLines(String...)} has been called, those will be used as filter.
+     * If forStops() and/or forLines() has been called, those will be used as filter.
      *
      * @param query The query.
      * @return The list.
@@ -351,21 +410,52 @@ public class UraClient implements Serializable {
      * @since 2.0 Throws {@link UraClientException}.
      */
     public List<Stop> getStops(final Query query) throws UraClientException {
-        List<Stop> stops = new ArrayList<>();
+        try {
-        try (InputStream is = requestInstant(REQUEST_STOP, query);
+            return getStopsAsync(query).join();
-             BufferedReader br = new BufferedReader(new InputStreamReader(is))) {
+        } catch (CompletionException e) {
-            String line;
+            if (e.getCause() instanceof AsyncUraClientException) {
-            while ((line = br.readLine()) != null) {
+                throw new UraClientException((AsyncUraClientException) e.getCause());
-                List<Serializable> l = mapper.readValue(line, mapper.getTypeFactory().constructCollectionType(List.class, Serializable.class));
+            } else {
-                /* Check if result exists and has correct response type */
+                throw new UraClientException("Asynchronous stop request failed to complete", e.getCause());
-                if (l != null && !l.isEmpty() && l.get(0).equals(RES_TYPE_STOP)) {
-                    stops.add(new Stop(l));
-                }
             }
-        } catch (IOException e) {
-            throw new UraClientException("Failed to read stops from API", e);
         }
-        return stops;
+    }
+
+    /**
+     * Get list of stops without filters asynchronously.
+     *
+     * @return The list of stops.
+     * @since 2.1
+     */
+    public CompletableFuture<List<Stop>> getStopsAsync() {
+        return getStopsAsync(new Query());
+    }
+
+    /**
+     * List available stopIDs asynchronously.
+     * If forStops() and/or forLines() has been called, those will be used as filter.
+     *
+     * @param query The query.
+     * @return The list.
+     * @since 2.0
+     */
+    public CompletableFuture<List<Stop>> getStopsAsync(final Query query) {
+        return requestInstantAsync(REQUEST_TRIP, query).thenApply(is -> {
+            List<Stop> stops = new ArrayList<>();
+            try (is; BufferedReader br = new BufferedReader(new InputStreamReader(is))) {
+                String line;
+                while ((line = br.readLine()) != null) {
+                    List<Serializable> l = mapper.readValue(line, mapper.getTypeFactory().constructCollectionType(List.class, Serializable.class));
+                    /* Check if result exists and has correct response type */
+                    if (l != null && !l.isEmpty() && l.get(0).equals(RES_TYPE_STOP)) {
+                        stops.add(new Stop(l));
+                    }
+                }
+            } catch (IOException e) {
+                throw new AsyncUraClientException("Failed to read stops from API", e);
+            }
+            return stops;
+        });
     }
 
     /**
@@ -395,20 +485,6 @@ public class UraClient implements Serializable {
         return getMessages(query, null);
     }
 
-
-    /**
-     * Get list of messages with limit.
-     * If forStops() has been called, those will be used as filter.
-     *
-     * @param limit Maximum number of results.
-     * @return List of trips.
-     * @throws UraClientException Error with API communication.
-     * @since 2.0.4
-     */
-    public List<Message> getMessages(final Integer limit) throws UraClientException {
-        return getMessages(new Query(), limit);
-    }
-
     /**
      * Get list of messages for given stopIDs with result limit.
      *
@@ -420,39 +496,83 @@ public class UraClient implements Serializable {
      * @since 2.0 Throw {@link UraClientException}.
      */
     public List<Message> getMessages(final Query query, final Integer limit) throws UraClientException {
-        List<Message> messages = new ArrayList<>();
+        try {
-        try (InputStream is = requestInstant(REQUEST_MESSAGE, query);
+            return getMessagesAsync(query, limit).join();
-             BufferedReader br = new BufferedReader(new InputStreamReader(is))) {
+        } catch (CompletionException e) {
-            String version = null;
+            if (e.getCause() instanceof AsyncUraClientException) {
-            String line = br.readLine();
+                throw new UraClientException((AsyncUraClientException) e.getCause());
-            while (line != null && (limit == null || messages.size() < limit)) {
+            } else {
-                List<Serializable> l = mapper.readValue(line, mapper.getTypeFactory().constructCollectionType(List.class, Serializable.class));
+                throw new UraClientException("Asynchronous message request failed to complete", e.getCause());
-                /* Check if result exists and has correct response type */
-                if (l != null && !l.isEmpty()) {
-                    if (l.get(0).equals(RES_TYPE_URA_VERSION)) {
-                        version = l.get(1).toString();
-                    } else if (l.get(0).equals(RES_TYPE_FLEX_MESSAGE)) {
-                        messages.add(new Message(l, version));
-                    }
-                }
-                line = br.readLine();
             }
-        } catch (IOException e) {
-            throw new UraClientException("Failed to read messages from API", e);
         }
-        return messages;
     }
 
     /**
-     * Issue request to instant endpoint and return input stream.
+     * Get list of messages.
+     *
+     * @return List of messages.
+     * @since 2.1
+     */
+    public CompletableFuture<List<Message>> getMessagesAsync() {
+        return getMessagesAsync(new Query(), null);
+    }
+
+
+    /**
+     * Get list of messages asynchronously.
+     * If forStops() has been called, those will be used as filter.
+     *
+     * @param query The query.
+     * @return List of messages.
+     * @since 2.1
+     */
+    public CompletableFuture<List<Message>> getMessagesAsync(final Query query) {
+        return getMessagesAsync(query, null);
+    }
+
+    /**
+     * Get list of messages for given stopIDs with result limit asynchronously.
+     *
+     * @param query The query.
+     * @param limit Maximum number of results.
+     * @return List of messages.
+     * @since 2.1
+     */
+    public CompletableFuture<List<Message>> getMessagesAsync(final Query query, final Integer limit) {
+        return requestInstantAsync(REQUEST_MESSAGE, query).thenApply(is -> {
+            List<Message> messages = new ArrayList<>();
+            try (is; BufferedReader br = new BufferedReader(new InputStreamReader(is))) {
+                String version = null;
+                String line = br.readLine();
+                while (line != null && (limit == null || messages.size() < limit)) {
+                    List<Serializable> l = mapper.readValue(line, mapper.getTypeFactory().constructCollectionType(List.class, Serializable.class));
+                    /* Check if result exists and has correct response type */
+                    if (l != null && !l.isEmpty()) {
+                        if (l.get(0).equals(RES_TYPE_URA_VERSION)) {
+                            version = l.get(1).toString();
+                        } else if (l.get(0).equals(RES_TYPE_FLEX_MESSAGE)) {
+                            messages.add(new Message(l, version));
+                        }
+                    }
+                    line = br.readLine();
+                }
+            } catch (IOException e) {
+                throw new AsyncUraClientException("Failed to read messages from API", e);
+            }
+            return messages;
+        });
+    }
+
+    /**
+     * Issue asynchronous request to instant endpoint and return input stream.
      *
      * @param returnList Fields to fetch.
      * @param query      The query.
      * @return Response {@link InputStream}.
-     * @throws IOException on errors
+     * @since 2.1
      */
-    private InputStream requestInstant(final String[] returnList, final Query query) throws IOException {
+    private CompletableFuture<InputStream> requestInstantAsync(final String[] returnList, final Query query) {
-        return request(requestURL(config.getBaseURL() + config.getInstantPath(), returnList, query));
+        return requestAsync(requestURL(config.getBaseURL() + config.getInstantPath(), returnList, query));
     }
 
     /**
@@ -512,6 +632,28 @@ public class UraClient implements Serializable {
         }
     }
 
+    /**
+     * Open given URL as InputStream.
+     *
+     * @param url The URL.
+     * @return Response {@link InputStream}.
+     * @since 2.1
+     */
+    private CompletableFuture<InputStream> requestAsync(String url) {
+        var clientBuilder = HttpClient.newBuilder();
+        if (config.getConnectTimeout() != null) {
+            clientBuilder.connectTimeout(config.getConnectTimeout());
+        }
+
+        var reqBuilder = HttpRequest.newBuilder(URI.create(url)).GET();
+        if (config.getTimeout() != null) {
+            reqBuilder.timeout(config.getTimeout());
+        }
+
+        return clientBuilder.build().sendAsync(reqBuilder.build(), HttpResponse.BodyHandlers.ofInputStream())
+                .thenApply(HttpResponse::body);
+    }
+
     /**
      * Add a URL parameter with list of values, if filled.
      *
@@ -644,6 +786,16 @@ public class UraClient implements Serializable {
             return UraClient.this.getStops(this);
         }
 
+        /**
+         * Get stops for set filters asynchronously.
+         *
+         * @return List of matching trips.
+         * @since 2.1
+         */
+        public CompletableFuture<List<Stop>> getStopsAsync() {
+            return UraClient.this.getStopsAsync(this);
+        }
+
         /**
          * Get trips for set filters.
          *
@@ -657,15 +809,13 @@ public class UraClient implements Serializable {
         }
 
         /**
-         * Get trips for set filters with limit.
+         * Get trips for set filters asynchronously.
          *
-         * @param limit Maximum number of results.
          * @return List of matching trips.
-         * @throws UraClientException Error with API communication.
+         * @since 2.1
-         * @since 2.0.4
          */
-        public List<Trip> getTrips(final Integer limit) throws UraClientException {
+        public CompletableFuture<List<Trip>> getTripsAsync() {
-            return UraClient.this.getTrips(this, limit);
+            return UraClient.this.getTripsAsync(this);
         }
 
         /**
@@ -706,15 +856,13 @@ public class UraClient implements Serializable {
         }
 
         /**
-         * Get trips for set filters.
+         * Get trips for set filters asynchronously.
          *
-         * @param limit Maximum number of results.
          * @return List of matching messages.
-         * @throws UraClientException Error with API communication.
+         * @since 2.1
-         * @since 2.0.4
          */
-        public List<Message> getMessages(final Integer limit) throws UraClientException {
+        public CompletableFuture<List<Message>> getMessagesAsync() {
-            return UraClient.this.getMessages(this, limit);
+            return UraClient.this.getMessagesAsync(this);
         }
     }
 }

src/main/java/de/stklcode/pubtrans/ura/exception/AsyncUraClientException.java

@@ -0,0 +1,37 @@
+/*
+ * 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.pubtrans.ura.exception;
+
+/**
+ * Custom exception class indicating an error with the URA API communication.
+ *
+ * @author Stefan Kalscheuer
+ * @since 2.1
+ */
+public class AsyncUraClientException extends RuntimeException {
+    private static final long serialVersionUID = -7530123149703928296L;
+
+    /**
+     * Default constructor.
+     *
+     * @param message The detail message (which is saved for later retrieval by the {@link #getMessage()} method)
+     * @param cause   The cause (which is saved for later retrieval by the {@link #getCause()} method).
+     */
+    public AsyncUraClientException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}

src/main/java/de/stklcode/pubtrans/ura/exception/UraClientConfigurationException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 Stefan Kalscheuer
+ * 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.

src/main/java/de/stklcode/pubtrans/ura/exception/UraClientException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 Stefan Kalscheuer
+ * 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.
@@ -36,4 +36,13 @@ public class UraClientException extends IOException {
     public UraClientException(String message, Throwable cause) {
         super(message, cause);
     }
+
+    /**
+     * Constructor from asynchronous exception.
+     *
+     * @param e Asynchronous exception to wrap.
+     */
+    public UraClientException(AsyncUraClientException e) {
+        super(e.getMessage(), e.getCause());
+    }
 }

src/main/java/de/stklcode/pubtrans/ura/exception/package-info.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 Stefan Kalscheuer
+ * 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.

src/main/java/de/stklcode/pubtrans/ura/model/Model.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 Stefan Kalscheuer
+ * 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.

src/main/java/de/stklcode/pubtrans/ura/model/Stop.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 Stefan Kalscheuer
+ * 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.

src/main/java/de/stklcode/pubtrans/ura/model/Trip.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 Stefan Kalscheuer
+ * 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.

src/main/java/de/stklcode/pubtrans/ura/model/package-info.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 Stefan Kalscheuer
+ * 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.

src/main/java/de/stklcode/pubtrans/ura/package-info.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 Stefan Kalscheuer
+ * 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.

src/main/java/de/stklcode/pubtrans/ura/reader/AsyncUraTripReader.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 Stefan Kalscheuer
+ * 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.

src/main/java/de/stklcode/pubtrans/ura/reader/package-info.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 Stefan Kalscheuer
+ * 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.

src/main/java/module-info.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 Stefan Kalscheuer
+ * 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.

src/test/java/de/stklcode/pubtrans/ura/UraClientTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 Stefan Kalscheuer
+ * 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.
@@ -183,12 +183,6 @@ public class UraClientTest {
         assertThat(trips.get(8).getVisitID(), is(30));
         assertThat(trips.get(9).getStop().getId(), is("100002"));
 
-        // With limit.
-        trips = new UraClient(wireMock.baseUrl()).getTrips(5);
-        assertThat(trips, hasSize(5));
-        trips = new UraClient(wireMock.baseUrl()).getTrips(11);
-        assertThat(trips, hasSize(10));
-
         // Repeat test for API V2.
         mockHttpToFile(2, "instant_V2_trips_all.txt");
 
@@ -248,12 +242,6 @@ public class UraClientTest {
         assertThat(trips.get(2).getLineName(), is("25"));
         assertThat(trips.get(3).getStop().getIndicator(), is("H.15"));
 
-        // With limit.
-        trips = new UraClient(wireMock.baseUrl())
-                .forStops("100000")
-                .getTrips(7);
-        assertThat(trips, hasSize(7));
-
         // Get trips for stop name "Uniklinik" and verify some values.
         mockHttpToFile(1, "instant_V1_trips_stop_name.txt");
         trips = new UraClient(wireMock.baseUrl())
@@ -349,13 +337,12 @@ public class UraClientTest {
 
     @Test
     public void getMessages() throws UraClientException {
-        UraClient uraClient = new UraClient(wireMock.baseUrl());
-
         // Mock the HTTP call.
         mockHttpToFile(1, "instant_V1_messages.txt");
 
         // Get messages without filter and verify some values.
-        List<Message> messages = uraClient.getMessages();
+        List<Message> messages = new UraClient(wireMock.baseUrl())
+                .getMessages();
         assertThat(messages, hasSize(2));
         assertThat(messages.get(0).getStop().getId(), is("100707"));
         assertThat(messages.get(0).getUuid(), is("016e1231d4e30014_100707"));
@@ -366,12 +353,6 @@ public class UraClientTest {
         assertThat(messages.get(0).getText(), is("Sehr geehrte Fahrgäste, wegen Strassenbauarbeiten kann diese Haltestelle nicht von den Bussen der Linien 17, 44 und N2 angefahren werden."));
         assertThat(messages.get(1).getText(), is("Sehr geehrte Fahrgäste, diese Haltestelle wird vorübergehend von den Linien 47, 147 und N3 nicht angefahren."));
 
-        // With limit.
-        messages = uraClient.getMessages(1);
-        assertThat(messages, hasSize(1));
-        messages = uraClient.getMessages(3);
-        assertThat(messages, hasSize(2));
-
         mockHttpToException();
         UraClientException exception = assertThrows(
                 UraClientException.class,
@@ -384,25 +365,19 @@ public class UraClientTest {
 
     @Test
     public void getMessagesForStop() throws UraClientException {
-        UraClient uraClient = new UraClient(wireMock.baseUrl(), "/interfaces/ura/instant_V2", "/interfaces/ura/stream");
-
         // Mock the HTTP call.
         mockHttpToFile(2, "instant_V2_messages_stop.txt");
 
         // Get trips for stop ID 100707 (Berensberger Str.) and verify some values.
-        List<Message> messages = uraClient.forStops("100707").getMessages();
+        List<Message> messages = new UraClient(wireMock.baseUrl(), "/interfaces/ura/instant_V2", "/interfaces/ura/stream")
+                .forStops("100707")
+                .getMessages();
         assertThat(messages, hasSize(1));
         assertThat(messages.stream().filter(t -> !t.getStop().getId().equals("100707")).findAny(), is(Optional.empty()));
         assertThat(messages.get(0).getUuid(), is("016e1231d4e30014_100707"));
         assertThat(messages.get(0).getType(), is(0));
         assertThat(messages.get(0).getPriority(), is(3));
         assertThat(messages.get(0).getText(), is("Sehr geehrte Fahrgäste, wegen Strassenbauarbeiten kann diese Haltestelle nicht von den Bussen der Linien 17, 44 und N2 angefahren werden."));
-
-        // With limit.
-        messages = uraClient.forStops("100707").getMessages(0);
-        assertThat(messages, hasSize(0));
-        messages = uraClient.forStops("100707").getMessages(2);
-        assertThat(messages, hasSize(1));
     }
 
     @Test

src/test/java/de/stklcode/pubtrans/ura/model/MessageTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 Stefan Kalscheuer
+ * 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.

src/test/java/de/stklcode/pubtrans/ura/model/StopTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 Stefan Kalscheuer
+ * 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.

src/test/java/de/stklcode/pubtrans/ura/model/TripTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 Stefan Kalscheuer
+ * 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.

src/test/java/de/stklcode/pubtrans/ura/reader/AsyncUraTripReaderTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 Stefan Kalscheuer
+ * 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.