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package org.glassfish.jersey.examples.sse.jaxrs;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.Entity;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.Application;
import javax.ws.rs.core.Response;
import javax.ws.rs.sse.SseEventSource;
import org.glassfish.jersey.internal.guava.ThreadFactoryBuilder;
import org.glassfish.jersey.server.ResourceConfig;
import org.glassfish.jersey.test.JerseyTest;
import org.junit.Test;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.CoreMatchers.notNullValue;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
/**
* SSE example resources test.
*
* @author Pavel Bucek (pavel.bucek at oracle.com)
* @author Marek Potociar (marek.potociar at oracle.com)
* @author Adam Lindenthal (adam.lindenthal at oracle.com)
*/
public class ServerSentEventsTest extends JerseyTest {
private final ExecutorService executorService =
Executors.newCachedThreadPool(new ThreadFactoryBuilder().setNameFormat("ServerSentEventsTest-%d").build());
private final Client client = ClientBuilder.newBuilder().executorService(executorService).build();
@Override
protected Application configure() {
// enable(TestProperties.LOG_TRAFFIC);
return new ResourceConfig(JaxRsServerSentEventsResource.class, DomainResource.class);
}
@Override
protected Client getClient() {
return client;
}
@Override
public void tearDown() throws Exception {
super.tearDown();
client.close();
executorService.shutdown();
}
/**
* Test consuming a single SSE event via event source.
*
* @throws Exception in case of a failure during the test execution.
*/
@Test
public void testEventSource() throws Exception {
final CountDownLatch latch = new CountDownLatch(1);
final AtomicReference<String> message = new AtomicReference<>();
final SseEventSource eventSource = SseEventSource.target(target().path(App.ROOT_PATH)).build();
eventSource.register((inboundEvent) -> {
final String value = inboundEvent.readData();
message.set(value);
latch.countDown();
});
eventSource.open();
target().path(App.ROOT_PATH).request().post(Entity.text("message"));
try {
assertTrue("Waiting for message to be delivered has timed out.",
latch.await(5 * getAsyncTimeoutMultiplier(), TimeUnit.SECONDS));
} finally {
eventSource.close();
}
assertThat("Unexpected SSE event data value.", message.get(), equalTo("message"));
}
/**
* Test receiving all streamed messages in parallel by multiple event sources.
*
* @throws Exception in case of a failure during the test execution.
*/
@Test
public void testCreateDomain() throws Exception {
final int MAX_CLIENTS = 25;
final int MESSAGE_COUNT = 6;
final Response response = target().path("domain/start")
.queryParam("testSources", MAX_CLIENTS)
.request().post(Entity.text("data"), Response.class);
assertThat("Unexpected start domain response status code.",
response.getStatus(), equalTo(Response.Status.CREATED.getStatusCode()));
final Map<Integer, Integer> messageCounts = new ConcurrentHashMap<>(MAX_CLIENTS);
final CountDownLatch doneLatch = new CountDownLatch(MAX_CLIENTS);
final SseEventSource[] sources = new SseEventSource[MAX_CLIENTS];
final String processUriString = target().getUri().relativize(response.getLocation()).toString();
final WebTarget sseTarget = target().path(processUriString).queryParam("testSource", "true");
for (int i = 0; i < MAX_CLIENTS; i++) {
final AtomicInteger messageCount = new AtomicInteger(0); // will this work?
final int id = i;
sources[id] = SseEventSource.target(sseTarget).build();
sources[id].register((event) -> {
messageCount.incrementAndGet();
final String message = event.readData(String.class);
if ("done".equals(message)) {
messageCounts.put(id, messageCount.get());
doneLatch.countDown();
}
});
sources[i].open();
}
doneLatch.await(5 * getAsyncTimeoutMultiplier(), TimeUnit.SECONDS);
for (SseEventSource source : sources) {
source.close();
}
for (int i = 0; i < MAX_CLIENTS; i++) {
final Integer count = messageCounts.get(i);
assertThat("Final message not received by event source " + i, count, notNullValue());
assertThat("Unexpected number of messages received by event source " + i,
count, equalTo(MESSAGE_COUNT));
}
}
}