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package org.glassfish.jersey.examples.sseitemstore.jaxrs;
import java.net.URI;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
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 java.util.logging.Level;
import java.util.logging.Logger;
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.Form;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriBuilder;
import javax.ws.rs.sse.SseEventSource;
import org.glassfish.jersey.apache.connector.ApacheClientProperties;
import org.glassfish.jersey.apache.connector.ApacheConnectorProvider;
import org.glassfish.jersey.client.ClientConfig;
import org.glassfish.jersey.client.ClientProperties;
import org.glassfish.jersey.internal.guava.ThreadFactoryBuilder;
import org.glassfish.jersey.test.JerseyTest;
import org.glassfish.jersey.test.external.ExternalTestContainerFactory;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.junit.Test;
import static org.hamcrest.CoreMatchers.containsString;
import static org.hamcrest.CoreMatchers.describedAs;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.CoreMatchers.hasItems;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
/**
* Item store test.
*
* @author Marek Potociar (marek.potociar at oracle.com)
*/
public class JaxrsItemStoreResourceTest extends JerseyTest {
private static final int RECONNECT_DEFAULT = 500;
private static final Logger LOGGER = Logger.getLogger(JaxrsItemStoreResourceTest.class.getName());
private static final int MAX_LISTENERS = 5;
private static final int MAX_ITEMS = 10;
private final ExecutorService executorService =
Executors.newCachedThreadPool(new ThreadFactoryBuilder().setNameFormat("JaxrsItemStoreResourceTest-%d").build());
private final AtomicReference<Client> client = new AtomicReference<>(null);
@Override
protected Application configure() {
return new JaxrsItemStoreApp();
}
protected void configureClient(ClientConfig config) {
// using AHC as a test client connector to avoid issues with HttpUrlConnection socket management.
PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
// adjusting max. connections just to be safe - the testEventSourceReconnect is quite greedy...
cm.setMaxTotal(MAX_LISTENERS * MAX_ITEMS);
cm.setDefaultMaxPerRoute(MAX_LISTENERS * MAX_ITEMS);
config.property(ApacheClientProperties.CONNECTION_MANAGER, cm)
.property(ClientProperties.READ_TIMEOUT, 2000)
.connectorProvider(new ApacheConnectorProvider());
}
@Override
protected Client getClient() {
if (client.get() == null) {
ClientConfig clientConfig = new ClientConfig();
configureClient(clientConfig);
client.compareAndSet(null,
ClientBuilder.newBuilder()
.withConfig(clientConfig)
.executorService(executorService).build());
}
return client.get();
}
@Override
public void tearDown() throws Exception {
super.tearDown();
client.get().close();
executorService.shutdown();
}
@Override
protected URI getBaseUri() {
final UriBuilder baseUriBuilder = UriBuilder.fromUri(super.getBaseUri()).path("sse-item-store-jaxrs-webapp");
final boolean externalFactoryInUse = getTestContainerFactory() instanceof ExternalTestContainerFactory;
return externalFactoryInUse ? baseUriBuilder.path("resources").build() : baseUriBuilder.build();
}
/**
* Test the item addition, addition event broadcasting and item retrieval from {@link JaxrsItemStoreResource}.
*
* @throws Exception in case of a test failure.
*/
@Test
public void testItemsStore() throws Exception {
final List<String> items = Collections.unmodifiableList(Arrays.asList("foo", "bar", "baz"));
final WebTarget itemsTarget = target("items");
final CountDownLatch latch = new CountDownLatch(items.size() * MAX_LISTENERS * 2); // countdown on all events
final List<Queue<Integer>> indexQueues = new ArrayList<>(MAX_LISTENERS);
final SseEventSource[] sources = new SseEventSource[MAX_LISTENERS];
final AtomicInteger sizeEventsCount = new AtomicInteger(0);
for (int i = 0; i < MAX_LISTENERS; i++) {
final int id = i;
final SseEventSource es = SseEventSource.target(itemsTarget.path("events")).build();
sources[id] = es;
final Queue<Integer> indexes = new ConcurrentLinkedQueue<>();
indexQueues.add(indexes);
es.register(inboundEvent -> {
try {
if (null == inboundEvent.getName()) {
final String data = inboundEvent.readData();
LOGGER.info("[-i-] SOURCE " + id + ": Received event id=" + inboundEvent.getId() + " data=" + data);
indexes.add(items.indexOf(data));
} else if ("size".equals(inboundEvent.getName())) {
sizeEventsCount.incrementAndGet();
}
} catch (Exception ex) {
LOGGER.log(Level.SEVERE, "[-x-] SOURCE " + id + ": Error getting event data.", ex);
indexes.add(-999);
} finally {
latch.countDown();
}
});
}
try {
open(sources);
items.forEach((item) -> postItem(itemsTarget, item));
assertTrue("Waiting to receive all events has timed out.",
latch.await((1000 + MAX_LISTENERS * RECONNECT_DEFAULT) * getAsyncTimeoutMultiplier(),
TimeUnit.MILLISECONDS));
// need to force disconnect on server in order for EventSource.close(...) to succeed with HttpUrlConnection
sendCommand(itemsTarget, "disconnect");
} finally {
close(sources);
}
String postedItems = itemsTarget.request().get(String.class);
items.forEach((item) -> assertTrue("Item '" + item + "' not stored on server.", postedItems.contains(item)));
final AtomicInteger queueId = new AtomicInteger(0);
indexQueues.forEach((indexes) -> {
for (int i = 0; i < items.size(); i++) {
assertTrue("Event for '" + items.get(i) + "' not received in queue " + queueId.get(), indexes.contains(i));
}
assertEquals("Not received the expected number of events in queue " + queueId.get(), items.size(), indexes.size());
queueId.incrementAndGet();
});
assertEquals("Number of received 'size' events does not match.", items.size() * MAX_LISTENERS, sizeEventsCount.get());
}
/**
* Test the {@link SseEventSource} reconnect feature.
*
* @throws Exception in case of a test failure.
*/
@Test
public void testEventSourceReconnect() throws Exception {
final WebTarget itemsTarget = target("items");
final CountDownLatch latch = new CountDownLatch(MAX_ITEMS * MAX_LISTENERS * 2); // countdown only on new item events
final List<Queue<String>> receivedQueues = new ArrayList<>(MAX_LISTENERS);
final SseEventSource[] sources = new SseEventSource[MAX_LISTENERS];
for (int i = 0; i < MAX_LISTENERS; i++) {
final int id = i;
final SseEventSource es = SseEventSource.target(itemsTarget.path("events"))
.reconnectingEvery(1, TimeUnit.MILLISECONDS).build();
sources[id] = es;
final Queue<String> received = new ConcurrentLinkedQueue<>();
receivedQueues.add(received);
es.register(inboundEvent -> {
try {
if (null == inboundEvent.getName()) {
final String data = inboundEvent.readData();
LOGGER.info("[-i-] SOURCE " + id + ": Received event id=" + inboundEvent.getId() + " data=" + data);
received.add(data);
latch.countDown();
}
} catch (Exception ex) {
LOGGER.log(Level.SEVERE, "[-x-] SOURCE " + id + ": Error getting event data.", ex);
received.add("[data processing error]");
}
});
}
final String[] postedItems = new String[MAX_ITEMS * 2];
try {
open(sources);
for (int i = 0; i < MAX_ITEMS; i++) {
final String item = String.format("round-1-%02d", i);
postItem(itemsTarget, item);
postedItems[i] = item;
sendCommand(itemsTarget, "disconnect");
Thread.sleep(200);
}
final int reconnectDelay = 1;
sendCommand(itemsTarget, "reconnect " + reconnectDelay);
sendCommand(itemsTarget, "disconnect");
Thread.sleep(reconnectDelay * 1000);
for (int i = 0; i < MAX_ITEMS; i++) {
final String item = String.format("round-2-%02d", i);
postedItems[i + MAX_ITEMS] = item;
postItem(itemsTarget, item);
}
sendCommand(itemsTarget, "reconnect now");
assertTrue("Waiting to receive all events has timed out.",
latch.await((1 + MAX_LISTENERS * (MAX_ITEMS + 1) * reconnectDelay) * getAsyncTimeoutMultiplier(),
TimeUnit.SECONDS));
// need to force disconnect on server in order for EventSource.close(...) to succeed with HttpUrlConnection
sendCommand(itemsTarget, "disconnect");
} finally {
close(sources);
}
final String storedItems = itemsTarget.request().get(String.class);
for (String item : postedItems) {
assertThat("Posted item '" + item + "' stored on server", storedItems, containsString(item));
}
int sourceId = 0;
for (Queue<String> queue : receivedQueues) {
assertThat("Received events in source " + sourceId, queue,
describedAs("Collection containing %0", hasItems(postedItems), Arrays.asList(postedItems).toString()));
assertThat("Size of received queue for source " + sourceId, queue.size(), equalTo(postedItems.length));
sourceId++;
}
}
private static void postItem(final WebTarget itemsTarget, final String item) {
final Response response = itemsTarget.request().post(Entity.form(new Form("name", item)));
assertEquals("Posting new item has failed.", 204, response.getStatus());
LOGGER.info("[-i-] POSTed item: '" + item + "'");
}
private static void open(final SseEventSource[] sources) {
Arrays.stream(sources).forEach(SseEventSource::open);
}
private static void close(final SseEventSource[] sources) {
int i = 0;
for (SseEventSource source : sources) {
if (source.isOpen()) {
assertTrue("Waiting to close a source has timed out.", source.close(1, TimeUnit.SECONDS));
// source.close(100, TimeUnit.MILLISECONDS);
LOGGER.info("[<--] SOURCE " + i++ + " closed.");
}
}
}
private static void sendCommand(final WebTarget itemsTarget, final String command) {
final Response response = itemsTarget.path("commands").request().post(Entity.text(command));
assertEquals("'" + command + "' command has failed.", 200, response.getStatus());
LOGGER.info("[-!-] COMMAND '" + command + "' has been processed.");
}
}