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k0l0ssus 2018-08-06 21:20:02 -04:00 committed by GitHub
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4 changed files with 162 additions and 41 deletions
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21
jersey-client-rx/pom.xml
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@ -26,6 +26,27 @@
<artifactId>jersey-rx-client-rxjava2</artifactId>
<version>2.27</version>
</dependency>
<dependency>
<groupId>com.github.tomakehurst</groupId>
<artifactId>wiremock</artifactId>
<version>1.58</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
<version>5.2.0</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-json-jackson</artifactId>
<version>2.22</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.jaxrs</groupId>
<artifactId>jackson-jaxrs-json-provider</artifactId>
<version>2.4.1</version>
</dependency>
</dependencies>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

94
jersey-client-rx/src/main/java/com/baeldung/samples/jerseyrx/ClientOrchestration.java
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@ -11,12 +11,12 @@ import java.util.logging.Level;
import org.glassfish.jersey.client.rx.rxjava.RxObservableInvokerProvider;
import org.glassfish.jersey.client.rx.rxjava.RxObservableInvoker;
import java.util.logging.Logger;
import java.util.stream.Collectors;
import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.InvocationCallback;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.GenericType;
import javax.ws.rs.core.MediaType;
import org.glassfish.jersey.client.rx.rxjava2.RxFlowableInvoker;
import org.glassfish.jersey.client.rx.rxjava2.RxFlowableInvokerProvider;
import rx.Observable;
@ -28,7 +28,7 @@ import rx.Observable;
public class ClientOrchestration {
Client client = ClientBuilder.newClient();
WebTarget userIdService = client.target("http://localhost:8080/serviceA/id?limit=10");
WebTarget userIdService = client.target("http://localhost:8080/serviceA/id");
WebTarget nameService = client.target("http://localhost:8080/serviceA/{empId}/name");
WebTarget hashService = client.target("http://localhost:8080/serviceA/{comboIDandName}/hash");
@ -46,30 +46,33 @@ public class ClientOrchestration {
public void callBackOrchestrate() {
logger.info("Orchestrating with the pyramid of doom");
userIdService.request()
userIdService.request().accept(MediaType.APPLICATION_JSON)
.async()
.get(new InvocationCallback<List<Long>>() {
.get(new InvocationCallback<EmployeeDTO>() {
@Override
public void completed(List<Long> empIds) {
public void completed(EmployeeDTO empIdList) {
logger.info("[InvocationCallback] Got all the IDs " + empIdList.getEmpIds());
List<Long> empIds = empIdList.getEmpIds();
CountDownLatch completionTracker = new CountDownLatch(empIds.size()); //used to keep track of the progress of the subsequent calls
empIds.forEach((id) -> {
//for each employee ID, get the name
nameService.resolveTemplate("empId", id).request()
.async()
.get(new InvocationCallback<String>() {
@Override
public void completed(String response) {
completionTracker.countDown();
hashService.request().async().get(new InvocationCallback<String>() {
hashService.resolveTemplate("comboIDandName", response + id).request().async().get(new InvocationCallback<String>() {
@Override
public void completed(String response) {
logger.log(Level.INFO, "The hash output {0}", response);
logger.log(Level.INFO, "[InvocationCallback] The hash output {0}", response);
}
@Override
public void failed(Throwable throwable) {
completionTracker.countDown();
logger.log(Level.WARNING, "An error has occurred in the hashing request step {0}", throwable.getMessage());
logger.log(Level.WARNING, "[InvocationCallback] An error has occurred in the hashing request step {0}", throwable.getMessage());
}
});
}
@ -77,14 +80,14 @@ public class ClientOrchestration {
@Override
public void failed(Throwable throwable) {
completionTracker.countDown();
logger.log(Level.WARNING, "An error has occurred in the username request step {0}", throwable.getMessage());
logger.log(Level.WARNING, "[InvocationCallback] An error has occurred in the username request step {0}", throwable.getMessage());
}
});
});
try {
if (!completionTracker.await(10, TimeUnit.SECONDS)) { //wait for inner requests to complete in 10 seconds
logger.warning("Some requests didn't complete within the timeout");
logger.warning("[InvocationCallback] Some requests didn't complete within the timeout");
}
} catch (InterruptedException ex) {
Logger.getLogger(ClientOrchestration.class.getName()).log(Level.SEVERE, null, ex);
@ -94,24 +97,25 @@ public class ClientOrchestration {
@Override
public void failed(Throwable throwable) {
//implement callback
logger.warning("Couldn't get the list of IDs");
}
});
}
public void rxOrchestrate() {
logger.info("Orchestrating with a CompletionStage");
CompletionStage<List<Long>> userIdStage = userIdService.request()
CompletionStage<EmployeeDTO> userIdStage = userIdService.request().accept(MediaType.APPLICATION_JSON)
.rx()
.get(new GenericType<List<Long>>() {
.get(new GenericType<EmployeeDTO>() {
})
.exceptionally((Throwable throwable) -> {
logger.warning("An error has occurred");
logger.warning("[CompletionStage] An error has occurred");
return null;
});
userIdStage.thenAcceptAsync(listOfIds -> {
listOfIds.stream().forEach((Long id) -> {
userIdStage.thenAcceptAsync(empIdDto -> {
logger.info("[CompletionStage] Got all the IDs " + empIdDto.getEmpIds());
empIdDto.getEmpIds().stream().forEach((Long id) -> {
CompletableFuture<String> completable = nameService.resolveTemplate("empId", id)
.request()
.rx()
@ -124,9 +128,9 @@ public class ClientOrchestration {
.rx()
.get(String.class)
.toCompletableFuture()
.thenAcceptAsync(hashValue -> logger.log(Level.INFO, "The hash output {0}", hashValue))
.thenAcceptAsync(hashValue -> logger.log(Level.INFO, "[CompletionFuture] The hash output {0}", hashValue))
.exceptionally((Throwable throwable) -> {
logger.log(Level.WARNING, "Hash computation failed for {0}", id);
logger.log(Level.WARNING, "[CompletionStage] Hash computation failed for {0}", id);
return null;
});
@ -140,53 +144,61 @@ public class ClientOrchestration {
public void observableJavaOrchestrate() {
logger.info("Orchestrating with Observables");
Observable<List<Long>> userIdObservable = userIdService.register(RxObservableInvokerProvider.class).request()
Observable<EmployeeDTO> userIdObservable = userIdService.register(RxObservableInvokerProvider.class).request()
.accept(MediaType.APPLICATION_JSON)
.rx(RxObservableInvoker.class)
.get(new GenericType<List<Long>>() {
.get(new GenericType<EmployeeDTO>() {
});
userIdObservable.subscribe((List<Long> listOfIds) -> {
Observable.from(listOfIds).map(id
-> nameService.resolveTemplate("empId", id)
userIdObservable.subscribe((EmployeeDTO empIdList) -> {
logger.info("[Observable] Got all the IDs " + empIdList.getEmpIds());
Observable.from(empIdList.getEmpIds()).subscribe(id
-> nameService.register(RxObservableInvokerProvider.class)
.resolveTemplate("empId", id)
.request()
.rx(RxObservableInvoker.class)
.get(String.class)
.asObservable() //gotten the name for the given empId
.doOnError(throwable -> logger.log(Level.WARNING, "An error has occurred in the username request step {0}", throwable.getMessage()))
.subscribe(userName -> hashService.resolveTemplate("comboIDandName", userName + id)
.doOnError(throwable -> logger.log(Level.WARNING, " [Observable] An error has occurred in the username request step {0}", throwable.getMessage()))
.subscribe(userName -> hashService
.register(RxObservableInvokerProvider.class)
.resolveTemplate("comboIDandName", userName + id)
.request()
.rx(RxObservableInvoker.class)
.get(String.class)
.asObservable() //gotten the hash value for empId+username
.doOnError(throwable -> logger.log(Level.WARNING, "An error has occurred in the hashing request step {0}", throwable.getMessage()))
.subscribe(hashValue -> logger.log(Level.INFO, "The hash output {0}", hashValue))));
.doOnError(throwable -> logger.log(Level.WARNING, " [Observable]An error has occurred in the hashing request step {0}", throwable.getMessage()))
.subscribe(hashValue -> logger.log(Level.INFO, "[Observable] The hash output {0}", hashValue))));
});
}
public void flowableJavaOrchestrate() {
logger.info("Orchestrating with Flowable");
Flowable<List<Long>> userIdObservable = userIdService.register(RxFlowableInvokerProvider.class).request()
Flowable<EmployeeDTO> userIdObservable = userIdService.register(RxFlowableInvokerProvider.class)
.request()
.rx(RxFlowableInvoker.class)
.get(new GenericType<List<Long>>() {
.get(new GenericType<EmployeeDTO>() {
});
Disposable subscribe = userIdObservable.subscribe((List<Long> listOfIds) -> {
Disposable subscribe = userIdObservable.subscribe((EmployeeDTO dto) -> {
List<Long> listOfIds = dto.getEmpIds();
Observable.from(listOfIds).map(id
-> nameService.resolveTemplate("empId", id)
-> nameService.register(RxFlowableInvokerProvider.class)
.resolveTemplate("empId", id)
.request()
.rx(RxObservableInvoker.class)
.get(String.class)
.asObservable() //gotten the name for the given empId
.doOnError(throwable -> logger.log(Level.WARNING, "An error has occurred in the username request step {0}", throwable.getMessage()))
.subscribe(userName -> hashService.resolveTemplate("comboIDandName", userName + id)
.rx(RxFlowableInvoker.class)
.get(String.class) //gotten the name for the given empId
.doOnError(throwable -> logger.log(Level.WARNING, "[Flowable] An error has occurred in the username request step {0}", throwable.getMessage()))
.subscribe(userName -> hashService.register(RxFlowableInvokerProvider.class)
.resolveTemplate("comboIDandName", userName + id)
.request()
.rx(RxObservableInvoker.class)
.get(String.class)
.asObservable() //gotten the hash value for empId+username
.doOnError(throwable -> logger.warning("An error has occurred in the hashing request step " + throwable.getMessage()))
.subscribe(hashValue -> logger.log(Level.INFO, "The hash output {0}", hashValue))));
.rx(RxFlowableInvoker.class)
.get(String.class) //gotten the hash value for empId+username
.doOnError(throwable -> logger.warning(" [Flowable] An error has occurred in the hashing request step " + throwable.getMessage()))
.subscribe(hashValue -> logger.log(Level.INFO, "[Flowable] The hash output {0}", hashValue))));
});
}

21
jersey-client-rx/src/main/java/com/baeldung/samples/jerseyrx/EmployeeDTO.java Normal file
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@ -0,0 +1,21 @@
package com.baeldung.samples.jerseyrx;
import java.util.List;
/**
*
* @author SIGINT-X
*/
public class EmployeeDTO {
private List<Long> empIds;
public List<Long> getEmpIds() {
return empIds;
}
public void setEmpIds(List<Long> empIds) {
this.empIds = empIds;
}
}

67
jersey-client-rx/src/test/java/com/baeldung/samples/jerseyrx/ClientOrchestrationTest.java Normal file
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@ -0,0 +1,67 @@
package com.baeldung.samples.jerseyrx;
import com.github.tomakehurst.wiremock.WireMockServer;
import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
import static com.github.tomakehurst.wiremock.client.WireMock.configureFor;
import static com.github.tomakehurst.wiremock.client.WireMock.equalTo;
import static com.github.tomakehurst.wiremock.client.WireMock.get;
import static com.github.tomakehurst.wiremock.client.WireMock.stubFor;
import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
/**
*
* @author baeldung
*/
public class ClientOrchestrationTest {
ClientOrchestration orchestrator = new ClientOrchestration();
String jsonIdList = "{\"empIds\":[1,2,3,4,5,6]}";
String[] nameList = new String[]{"n/a", "Thor", "Hulk", "BlackWidow", "BlackPanther", "TheTick", "Hawkeye"};
String[] hashResultList = new String[]{"roht1", "kluh2", "WodiwKcalb3", "RehtnapKclab4", "kciteht5", "eyekwah6"};
WireMockServer wireMockServer = new WireMockServer();
@Before
public void setup() {
wireMockServer.start();
configureFor("localhost", 8080);
stubFor(get(urlEqualTo("/serviceA/id")).willReturn(aResponse().withBody(jsonIdList).withHeader("Content-Type", "application/json")));
stubFor(get(urlEqualTo("/serviceA/1/name")).willReturn(aResponse().withBody(nameList[1])));
stubFor(get(urlEqualTo("/serviceA/2/name")).willReturn(aResponse().withBody(nameList[2])));
stubFor(get(urlEqualTo("/serviceA/3/name")).willReturn(aResponse().withBody(nameList[3])));
stubFor(get(urlEqualTo("/serviceA/4/name")).willReturn(aResponse().withBody(nameList[4])));
stubFor(get(urlEqualTo("/serviceA/5/name")).willReturn(aResponse().withBody(nameList[5])));
stubFor(get(urlEqualTo("/serviceA/6/name")).willReturn(aResponse().withBody(nameList[6])));
stubFor(get(urlEqualTo("/serviceA/Thor1/hash")).willReturn(aResponse().withBody(hashResultList[0])));
stubFor(get(urlEqualTo("/serviceA/Hulk2/hash")).willReturn(aResponse().withBody(hashResultList[1])));
stubFor(get(urlEqualTo("/serviceA/BlackWidow3/hash")).willReturn(aResponse().withBody(hashResultList[2])));
stubFor(get(urlEqualTo("/serviceA/BlackPanther4/hash")).willReturn(aResponse().withBody(hashResultList[3])));
stubFor(get(urlEqualTo("/serviceA/TheTick5/hash")).willReturn(aResponse().withBody(hashResultList[4])));
stubFor(get(urlEqualTo("/serviceA/Hawkeye6/hash")).willReturn(aResponse().withBody(hashResultList[5])));
}
@Test
public void hits() {
orchestrator.callBackOrchestrate();
orchestrator.rxOrchestrate();
orchestrator.observableJavaOrchestrate();
orchestrator.flowableJavaOrchestrate();
}
@After
public void tearDown() {
}
}