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package org.glassfish.jersey.tests.e2e.client;
import java.lang.reflect.Field;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.core.Application;
import javax.ws.rs.core.Response;
import org.glassfish.jersey.apache.connector.ApacheConnectorProvider;
import org.glassfish.jersey.client.ClientConfig;
import org.glassfish.jersey.client.ClientLifecycleListener;
import org.glassfish.jersey.client.HttpUrlConnectorProvider;
import org.glassfish.jersey.client.JerseyClient;
import org.glassfish.jersey.client.spi.ConnectorProvider;
import org.glassfish.jersey.logging.LoggingFeature;
import org.glassfish.jersey.grizzly.connector.GrizzlyConnectorProvider;
import org.glassfish.jersey.jetty.connector.JettyConnectorProvider;
import org.glassfish.jersey.server.ResourceConfig;
import org.glassfish.jersey.test.JerseyTest;
import org.junit.Ignore;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;
/**
* Ensure Jersey connectors do not leak resources
* in case multiple client runtime instances are being created.
*
* On my laptop, 1000 iterations was sufficient to cause
* a memory leak until JERSEY-2688 got fixed.
*
* @author Jakub Podlesak (jakub.podlesak at oracle.com)
*/
@RunWith(Parameterized.class)
public class ShutdownHookMemoryLeakTest extends JerseyTest {
private static final String PATH = "test";
private static final int ITERATIONS = 1000;
private final ConnectorProvider connectorProvider;
public ShutdownHookMemoryLeakTest(final ConnectorProvider cp) {
connectorProvider = cp;
}
@Parameterized.Parameters
public static List<ConnectorProvider[]> connectionProviders() {
return Arrays.asList(new ConnectorProvider[][] {
{new GrizzlyConnectorProvider()},
{new JettyConnectorProvider()},
{new ApacheConnectorProvider()},
{new HttpUrlConnectorProvider()}
});
}
@Path(PATH)
public static class TestResource {
@GET
public String get() {
return "GET";
}
}
@Override
protected Application configure() {
return new ResourceConfig(TestResource.class);
}
@Override
protected void configureClient(ClientConfig config) {
config.connectorProvider(connectorProvider);
}
@Test
@Ignore("Unstable, ignored for now")
public void testClientDoesNotLeakResources() throws Exception {
final AtomicInteger listenersInitialized = new AtomicInteger(0);
final AtomicInteger listenersClosed = new AtomicInteger(0);
for (int i = 0; i < ITERATIONS; i++) {
final Response response = target(PATH).property("another", "runtime").register(new ClientLifecycleListener() {
@Override
public void onInit() {
listenersInitialized.incrementAndGet();
}
@Override
public void onClose() {
listenersClosed.incrementAndGet();
}
}).register(LoggingFeature.class).request().get();
assertEquals("GET", response.readEntity(String.class));
}
Collection shutdownHooks = getShutdownHooks(client());
assertThat(String.format(
"%s: number of initialized listeners should be the same as number of total request count",
connectorProvider.getClass()),
listenersInitialized.get(), is(ITERATIONS));
// the following check is fragile, as GC could break it easily
// assertThat(String.format(
// "%s: number of closed listeners should correspond to the number of missing hooks",
// connectorProvider.getClass()),
// listenersClosed.get(), is(ITERATIONS - shutdownHooks.size()));
client().close(); // clean up the rest
assertThat(String.format(
"%s: number of closed listeners should be the same as the number of total requests made",
connectorProvider.getClass()),
listenersClosed.get(), is(ITERATIONS));
}
private Collection getShutdownHooks(javax.ws.rs.client.Client client) throws NoSuchFieldException, IllegalAccessException {
JerseyClient jerseyClient = (JerseyClient) client;
Field shutdownHooksField = JerseyClient.class.getDeclaredField("shutdownHooks");
shutdownHooksField.setAccessible(true);
return (Collection) shutdownHooksField.get(jerseyClient);
}
}