Tom Hombergs
GitHub
commit
2501cc9599
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@ -0,0 +1,67 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.baeldung.samples</groupId>
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<artifactId>jersey-client-rx</artifactId>
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<version>1.0</version>
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<packaging>jar</packaging>
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<dependencies>
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<dependency>
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<groupId>org.glassfish.jersey.inject</groupId>
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<artifactId>jersey-hk2</artifactId>
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<version>2.27</version>
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</dependency>
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<dependency>
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<groupId>org.glassfish.jersey.core</groupId>
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<artifactId>jersey-client</artifactId>
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<version>2.27</version>
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</dependency>
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<dependency>
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<groupId>org.glassfish.jersey.ext.rx</groupId>
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<artifactId>jersey-rx-client-rxjava</artifactId>
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<version>2.27</version>
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</dependency>
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<dependency>
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<groupId>org.glassfish.jersey.ext.rx</groupId>
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<artifactId>jersey-rx-client-rxjava2</artifactId>
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<version>2.27</version>
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</dependency>
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<dependency>
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<groupId>com.github.tomakehurst</groupId>
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<artifactId>wiremock</artifactId>
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<version>1.58</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.junit.vintage</groupId>
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<artifactId>junit-vintage-engine</artifactId>
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<version>5.2.0</version>
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</dependency>
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<dependency>
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<groupId>org.glassfish.jersey.media</groupId>
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<artifactId>jersey-media-json-jackson</artifactId>
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<version>2.25</version>
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</dependency>
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<dependency>
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<groupId>com.fasterxml.jackson.jaxrs</groupId>
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<artifactId>jackson-jaxrs-json-provider</artifactId>
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<version>2.4.1</version>
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</dependency>
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<dependency>
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<groupId>org.slf4j</groupId>
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<artifactId>slf4j-jdk14</artifactId>
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<version>1.7.25</version>
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</dependency>
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<dependency>
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<groupId>org.assertj</groupId>
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<artifactId>assertj-core</artifactId>
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<version>3.10.0</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<maven.compiler.source>1.8</maven.compiler.source>
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<maven.compiler.target>1.8</maven.compiler.target>
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</properties>
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</project>
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@ -0,0 +1,3 @@
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# Fluent, Reactive Jersey Client Orchestration #
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### Sample code demonstrating the options for asynchronous, reactive RESTful service consumption with JAX-RS ###
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@ -0,0 +1,272 @@
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package com.baeldung.samples.jerseyrx;
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import static com.github.tomakehurst.wiremock.client.WireMock.*;
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import static org.assertj.core.api.Assertions.*;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import java.util.concurrent.CompletableFuture;
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import java.util.concurrent.CompletionStage;
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import java.util.concurrent.CountDownLatch;
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import java.util.concurrent.TimeUnit;
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import javax.ws.rs.client.Client;
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import javax.ws.rs.client.ClientBuilder;
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import javax.ws.rs.client.InvocationCallback;
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import javax.ws.rs.client.WebTarget;
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import javax.ws.rs.core.GenericType;
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import javax.ws.rs.core.MediaType;
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import org.glassfish.jersey.client.rx.rxjava.RxObservableInvoker;
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import org.glassfish.jersey.client.rx.rxjava.RxObservableInvokerProvider;
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import org.glassfish.jersey.client.rx.rxjava2.RxFlowableInvoker;
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import org.glassfish.jersey.client.rx.rxjava2.RxFlowableInvokerProvider;
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import org.junit.Before;
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import org.junit.Rule;
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import org.junit.Test;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import com.github.tomakehurst.wiremock.junit.WireMockRule;
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import io.reactivex.Flowable;
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import rx.Observable;
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/**
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*
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* @author baeldung
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*/
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public class ClientOrchestrationIntegrationTest {
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private Client client = ClientBuilder.newClient();
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private WebTarget userIdService = client.target("http://localhost:8080/id-service/ids");
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private WebTarget nameService = client.target("http://localhost:8080/name-service/users/{userId}/name");
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private WebTarget hashService = client.target("http://localhost:8080/hash-service/{rawValue}");
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private Logger logger = LoggerFactory.getLogger(ClientOrchestrationIntegrationTest.class);
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private String expectedUserIds = "[1,2,3,4,5,6]";
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private List<String> expectedNames = Arrays.asList("n/a", "Thor", "Hulk", "BlackWidow", "BlackPanther", "TheTick", "Hawkeye");
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private List<String> expectedHashValues = Arrays.asList("roht1", "kluh2", "WodiwKcalb3", "RehtnapKclab4", "kciteht5", "eyekwah6");
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@Rule
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public WireMockRule wireMockServer = new WireMockRule();
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@Before
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public void setup() {
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stubFor(get(urlEqualTo("/id-service/ids")).willReturn(aResponse().withBody(expectedUserIds).withHeader("Content-Type", "application/json")));
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stubFor(get(urlEqualTo("/name-service/users/1/name")).willReturn(aResponse().withBody(expectedNames.get(1))));
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stubFor(get(urlEqualTo("/name-service/users/2/name")).willReturn(aResponse().withBody(expectedNames.get(2))));
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stubFor(get(urlEqualTo("/name-service/users/3/name")).willReturn(aResponse().withBody(expectedNames.get(3))));
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stubFor(get(urlEqualTo("/name-service/users/4/name")).willReturn(aResponse().withBody(expectedNames.get(4))));
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stubFor(get(urlEqualTo("/name-service/users/5/name")).willReturn(aResponse().withBody(expectedNames.get(5))));
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stubFor(get(urlEqualTo("/name-service/users/6/name")).willReturn(aResponse().withBody(expectedNames.get(6))));
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stubFor(get(urlEqualTo("/hash-service/Thor1")).willReturn(aResponse().withBody(expectedHashValues.get(0))));
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stubFor(get(urlEqualTo("/hash-service/Hulk2")).willReturn(aResponse().withBody(expectedHashValues.get(1))));
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stubFor(get(urlEqualTo("/hash-service/BlackWidow3")).willReturn(aResponse().withBody(expectedHashValues.get(2))));
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stubFor(get(urlEqualTo("/hash-service/BlackPanther4")).willReturn(aResponse().withBody(expectedHashValues.get(3))));
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stubFor(get(urlEqualTo("/hash-service/TheTick5")).willReturn(aResponse().withBody(expectedHashValues.get(4))));
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stubFor(get(urlEqualTo("/hash-service/Hawkeye6")).willReturn(aResponse().withBody(expectedHashValues.get(5))));
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}
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@Test
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public void callBackOrchestrate() throws InterruptedException {
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List<String> receivedHashValues = new ArrayList<>();
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final CountDownLatch completionTracker = new CountDownLatch(expectedHashValues.size()); // used to keep track of the progress of the subsequent calls
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userIdService.request().accept(MediaType.APPLICATION_JSON).async().get(new InvocationCallback<List<Long>>() {
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@Override
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public void completed(List<Long> employeeIds) {
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logger.info("[CallbackExample] id-service result: {}", employeeIds);
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employeeIds.forEach((id) -> {
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// for each employee ID, get the name
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nameService.resolveTemplate("userId", id).request().async().get(new InvocationCallback<String>() {
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@Override
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public void completed(String response) {
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logger.info("[CallbackExample] name-service result: {}", response);
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hashService.resolveTemplate("rawValue", response + id).request().async().get(new InvocationCallback<String>() {
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@Override
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public void completed(String response) {
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logger.info("[CallbackExample] hash-service result: {}", response);
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receivedHashValues.add(response);
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completionTracker.countDown();
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}
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@Override
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public void failed(Throwable throwable) {
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logger.warn("[CallbackExample] An error has occurred in the hashing request step!", throwable);
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}
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});
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}
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@Override
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public void failed(Throwable throwable) {
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logger.warn("[CallbackExample] An error has occurred in the username request step!", throwable);
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}
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});
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});
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}
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@Override
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public void failed(Throwable throwable) {
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logger.warn("[CallbackExample] An error has occurred in the userId request step!", throwable);
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}
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});
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// wait for async calls to complete
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try {
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// wait for inner requests to complete in 10 seconds
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if (!completionTracker.await(10, TimeUnit.SECONDS)) {
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logger.warn("[CallbackExample] Some requests didn't complete within the timeout");
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}
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} catch (InterruptedException e) {
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logger.error("Interrupted!", e);
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}
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assertThat(receivedHashValues).containsAll(expectedHashValues);
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}
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@Test
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public void rxOrchestrate() throws InterruptedException {
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List<String> receivedHashValues = new ArrayList<>();
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final CountDownLatch completionTracker = new CountDownLatch(expectedHashValues.size()); // used to keep track of the progress of the subsequent calls
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CompletionStage<List<Long>> userIdStage = userIdService.request().accept(MediaType.APPLICATION_JSON).rx().get(new GenericType<List<Long>>() {
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}).exceptionally((throwable) -> {
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logger.warn("[CompletionStageExample] An error has occurred");
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return null;
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});
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userIdStage.thenAcceptAsync(employeeIds -> {
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logger.info("[CompletionStageExample] id-service result: {}", employeeIds);
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employeeIds.forEach((Long id) -> {
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CompletableFuture<String> completable = nameService.resolveTemplate("userId", id).request().rx().get(String.class).toCompletableFuture();
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completable.thenAccept((String userName) -> {
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logger.info("[CompletionStageExample] name-service result: {}", userName);
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hashService.resolveTemplate("rawValue", userName + id).request().rx().get(String.class).toCompletableFuture().thenAcceptAsync(hashValue -> {
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logger.info("[CompletionStageExample] hash-service result: {}", hashValue);
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receivedHashValues.add(hashValue);
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completionTracker.countDown();
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}).exceptionally((throwable) -> {
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logger.warn("[CompletionStageExample] Hash computation failed for {}", id);
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completionTracker.countDown();
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return null;
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});
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});
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});
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});
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// wait for async calls to complete
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try {
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// wait for inner requests to complete in 10 seconds
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if (!completionTracker.await(10, TimeUnit.SECONDS)) {
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logger.warn("[CallbackExample] Some requests didn't complete within the timeout");
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}
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} catch (InterruptedException e) {
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logger.error("Interrupted!", e);
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}
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assertThat(receivedHashValues).containsAll(expectedHashValues);
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}
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@Test
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public void observableJavaOrchestrate() throws InterruptedException {
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List<String> receivedHashValues = new ArrayList<>();
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final CountDownLatch completionTracker = new CountDownLatch(expectedHashValues.size()); // used to keep track of the progress of the subsequent calls
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Observable<List<Long>> observableUserIdService = userIdService.register(RxObservableInvokerProvider.class).request().accept(MediaType.APPLICATION_JSON).rx(RxObservableInvoker.class).get(new GenericType<List<Long>>() {
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}).asObservable();
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observableUserIdService.subscribe((List<Long> employeeIds) -> {
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logger.info("[ObservableExample] id-service result: {}", employeeIds);
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Observable.from(employeeIds).subscribe(id -> nameService.register(RxObservableInvokerProvider.class).resolveTemplate("userId", id).request().rx(RxObservableInvoker.class).get(String.class).asObservable() // gotten the name for the given
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// userId
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.doOnError((throwable) -> {
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logger.warn("[ObservableExample] An error has occurred in the username request step {}", throwable.getMessage());
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}).subscribe(userName -> {
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logger.info("[ObservableExample] name-service result: {}", userName);
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hashService.register(RxObservableInvokerProvider.class).resolveTemplate("rawValue", userName + id).request().rx(RxObservableInvoker.class).get(String.class).asObservable() // gotten the hash value for
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// userId+username
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.doOnError((throwable) -> {
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logger.warn("[ObservableExample] An error has occurred in the hashing request step {}", throwable.getMessage());
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}).subscribe(hashValue -> {
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logger.info("[ObservableExample] hash-service result: {}", hashValue);
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receivedHashValues.add(hashValue);
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completionTracker.countDown();
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});
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}));
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});
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// wait for async calls to complete
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try {
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// wait for inner requests to complete in 10 seconds
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if (!completionTracker.await(10, TimeUnit.SECONDS)) {
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logger.warn("[CallbackExample] Some requests didn't complete within the timeout");
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}
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} catch (InterruptedException e) {
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logger.error("Interrupted!", e);
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}
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assertThat(receivedHashValues).containsAll(expectedHashValues);
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}
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@Test
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public void flowableJavaOrchestrate() throws InterruptedException {
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List<String> receivedHashValues = new ArrayList<>();
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final CountDownLatch completionTracker = new CountDownLatch(expectedHashValues.size()); // used to keep track of the progress of the subsequent calls
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Flowable<List<Long>> userIdFlowable = userIdService.register(RxFlowableInvokerProvider.class).request().rx(RxFlowableInvoker.class).get(new GenericType<List<Long>>() {
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});
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userIdFlowable.subscribe((List<Long> employeeIds) -> {
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logger.info("[FlowableExample] id-service result: {}", employeeIds);
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Flowable.fromIterable(employeeIds).subscribe(id -> {
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nameService.register(RxFlowableInvokerProvider.class).resolveTemplate("userId", id).request().rx(RxFlowableInvoker.class).get(String.class) // gotten the name for the given userId
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.doOnError((throwable) -> {
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logger.warn("[FlowableExample] An error has occurred in the username request step {}", throwable.getMessage());
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}).subscribe(userName -> {
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logger.info("[FlowableExample] name-service result: {}", userName);
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hashService.register(RxFlowableInvokerProvider.class).resolveTemplate("rawValue", userName + id).request().rx(RxFlowableInvoker.class).get(String.class) // gotten the hash value for userId+username
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.doOnError((throwable) -> {
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logger.warn(" [FlowableExample] An error has occurred in the hashing request step!", throwable);
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}).subscribe(hashValue -> {
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logger.info("[FlowableExample] hash-service result: {}", hashValue);
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receivedHashValues.add(hashValue);
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completionTracker.countDown();
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});
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});
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});
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});
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// wait for async calls to complete
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try {
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// wait for inner requests to complete in 10 seconds
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if (!completionTracker.await(10, TimeUnit.SECONDS)) {
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logger.warn("[CallbackExample] Some requests didn't complete within the timeout");
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}
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} catch (InterruptedException e) {
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logger.error("Interrupted!", e);
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}
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assertThat(receivedHashValues).containsAll(expectedHashValues);
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}
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|
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}
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2
pom.xml
2
pom.xml
|
|
@ -584,6 +584,7 @@
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<module>spring-security-thymeleaf</module>
|
||||
<module>persistence-modules/java-jdbi</module>
|
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<module>jersey</module>
|
||||
<module>jersey-client-rx</module>
|
||||
<module>java-spi</module>
|
||||
<module>performance-tests</module>
|
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<module>twilio</module>
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|
|
@ -1123,6 +1124,7 @@
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<module>spring-security-thymeleaf</module>
|
||||
<module>persistence-modules/java-jdbi</module>
|
||||
<module>jersey</module>
|
||||
<module>jersey-client-rx</module>
|
||||
<module>java-spi</module>
|
||||
<module>performance-tests</module>
|
||||
<module>twilio</module>
|
||||
|
|
|
|||
Loading…
Reference in New Issue