/*
* Copyright (C) 2012 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License. You may obtain
* a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package com.facebook.swift.service.async;
import com.facebook.swift.codec.ThriftCodecManager;
import com.facebook.swift.service.ThriftClientManager;
import com.facebook.swift.service.ThriftServer;
import com.google.common.base.Optional;
import com.google.common.base.Throwables;
import com.google.common.collect.Lists;
import com.google.common.util.concurrent.FutureCallback;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.Uninterruptibles;
import io.airlift.units.Duration;
import org.apache.thrift.TException;
import org.apache.thrift.transport.TTransportException;
import org.jboss.netty.handler.timeout.ReadTimeoutException;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
import java.io.IOException;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import static org.testng.Assert.*;
public class AsyncClientTest extends AsyncTestBase
{
protected ThriftServer syncServer;
@Test
public void testSyncClient()
throws Exception
{
try (DelayedMap.Client client = createClient(DelayedMap.Client.class, syncServer).get()) {
List<String> keys = Lists.newArrayList("testKey");
List<String> values = client.getMultipleValues(0, TimeUnit.SECONDS, keys);
assertEquals(values, Lists.newArrayList("default"));
client.putValueSlowly(0, TimeUnit.SECONDS, "testKey", "testValue");
}
}
@Test
public void testAsyncClient()
throws Exception
{
ListenableFuture<String> getBeforeFuture;
ListenableFuture<String> getAfterFuture;
ListenableFuture<Void> putFuture;
try (DelayedMap.AsyncClient client = createClient(DelayedMap.AsyncClient.class, syncServer).get()) {
getBeforeFuture = client.getValueSlowly(200, TimeUnit.MILLISECONDS, "testKey");
putFuture = client.putValueSlowly(400, TimeUnit.MILLISECONDS, "testKey", "testValue");
getAfterFuture = client.getValueSlowly(600, TimeUnit.MILLISECONDS, "testKey");
assertEquals(Uninterruptibles.getUninterruptibly(getBeforeFuture), "default");
assertEquals(Uninterruptibles.getUninterruptibly(getAfterFuture), "testValue");
Uninterruptibles.getUninterruptibly(putFuture);
}
}
@Test(timeOut = 2000)
void testAsyncConnection() throws Exception
{
ListenableFuture<DelayedMap.AsyncClient> future = createClient(DelayedMap.AsyncClient.class, syncServer);
AsyncConnectionCallback futureCallback = new AsyncConnectionCallback();
Futures.addCallback(future, futureCallback);
futureCallback.waitForAsyncCallsToBeDispatched();
futureCallback.checkAsyncCallReturnValues();
}
/* Helper class for testAsyncConnection() */
class AsyncConnectionCallback implements FutureCallback<DelayedMap.AsyncClient> {
private final CountDownLatch latch = new CountDownLatch(1);
private ListenableFuture<String> getBeforeFuture = null;
private ListenableFuture<String> getAfterFuture = null;
private ListenableFuture<Void> putFuture = null;
@Override
public void onSuccess(DelayedMap.AsyncClient client)
{
try {
getBeforeFuture = client.getValueSlowly(200, TimeUnit.MILLISECONDS, "testKey");
putFuture = client.putValueSlowly(400, TimeUnit.MILLISECONDS, "testKey", "testValue");
getAfterFuture = client.getValueSlowly(600, TimeUnit.MILLISECONDS, "testKey");
}
catch (Throwable t) {
onFailure(t);
}
latch.countDown();
}
@Override
public void onFailure(Throwable t)
{
latch.countDown();
}
public void waitForAsyncCallsToBeDispatched() throws InterruptedException
{
latch.await();
}
public void checkAsyncCallReturnValues() throws ExecutionException, InterruptedException
{
// All these async calls include a delay, so none she be finished at first
assertFalse(getBeforeFuture.isDone());
assertFalse(getAfterFuture.isDone());
assertFalse(putFuture.isDone());
// Calls are timed to complete in order, but Verify that we can still wait on the
// futures out of order
assertEquals(getBeforeFuture.get(), "default");
assertEquals(getAfterFuture.get(), "testValue");
putFuture.get();
}
}
@Test
public void testAsyncOutOfOrder()
throws Exception
{
ListenableFuture<String> getFuture;
ListenableFuture<Void> putFuture;
try (DelayedMap.AsyncClient client = createClient(DelayedMap.AsyncClient.class, syncServer).get()) {
getFuture = client.getValueSlowly(500, TimeUnit.MILLISECONDS, "testKey");
putFuture = client.putValueSlowly(250, TimeUnit.MILLISECONDS, "testKey", "testValue");
assertEquals(getFuture.get(1, TimeUnit.SECONDS), "testValue");
putFuture.get(1, TimeUnit.SECONDS);
}
}
@Test
public void testAsyncEarlyListener()
throws Exception
{
ListenableFuture<String> getFuture;
final CountDownLatch latch = new CountDownLatch(1);
try (DelayedMap.AsyncClient client = createClient(DelayedMap.AsyncClient.class, syncServer).get()) {
getFuture = client.getValueSlowly(500, TimeUnit.MILLISECONDS, "testKey");
// Add callback immediately, to test case where it should be fired later when the
// results are ready
Futures.addCallback(getFuture, new FutureCallback<String>()
{
@Override
public void onSuccess(String result)
{
latch.countDown();
}
@Override
public void onFailure(Throwable t)
{
fail("Async call to getValueSlowly failed", t);
}
});
latch.await();
}
}
// Call a method that will sleep for longer than the channel timeout, and expect a
// TimeoutException (wrapped in a TTransportException)
@Test
public void testAsyncTimeout()
throws Exception
{
try (DelayedMap.AsyncClient client = createClient(DelayedMap.AsyncClient.class, syncServer).get()) {
ListenableFuture<String> getFuture = client.getValueSlowly(1500, TimeUnit.MILLISECONDS, "testKey");
try {
getFuture.get(2000, TimeUnit.MILLISECONDS);
fail("Call did not timeout as expected");
}
catch (java.util.concurrent.TimeoutException e) {
fail("Waited too long for channel timeout");
}
catch (ExecutionException e) {
checkTransportException(e.getCause(), ReadTimeoutException.class);
}
}
}
@Test
public void testAsyncLateListener()
throws Exception
{
ListenableFuture<String> getFuture;
final CountDownLatch latch = new CountDownLatch(1);
try (DelayedMap.AsyncClient client = createClient(DelayedMap.AsyncClient.class, syncServer).get()) {
getFuture = client.getValueSlowly(250, TimeUnit.MILLISECONDS, "testKey");
// Sleep first, to test the case where the callback is executed immediately
Thread.sleep(500);
Futures.addCallback(getFuture, new FutureCallback<String>()
{
@Override
public void onSuccess(String result)
{
latch.countDown();
}
@Override
public void onFailure(Throwable t)
{
fail("Async call to getValueSlowly failed", t);
}
});
// Because of the sleep above, the latch should already be open
// (because the callback is added on this thread and the default callback
// executor runs callbacks on the same thread, this shouldn't even be a race).
assertTrue(latch.await(0, TimeUnit.MILLISECONDS));
}
}
@Test
public void testAsyncOneWay()
throws InterruptedException, ExecutionException, TTransportException, IOException
{
final CountDownLatch latch = new CountDownLatch(1);
try (DelayedMap.AsyncClient client = createClient(DelayedMap.AsyncClient.class, syncServer).get()) {
ListenableFuture<Void> onewayFuture = client.onewayPutValueSlowly(100, TimeUnit.MILLISECONDS, "testKey", "testValue");
Futures.addCallback(onewayFuture, new FutureCallback<Void>()
{
@Override
public void onSuccess(Void result)
{
latch.countDown();
}
@Override
public void onFailure(Throwable t)
{
fail("Async call to onewayPutValueSlowly failed", t);
}
});
assertTrue(latch.await(500, TimeUnit.MILLISECONDS));
}
}
// Test that an exception thrown while handling a successful async connection get reported
// as a failure on the client future.
@Test
public void testClientCreateFailure()
throws InterruptedException, ExecutionException, TTransportException
{
try {
createClient(MalformedService.class, syncServer).get();
fail("Should not be able to successfully create a client for MalformedService.class");
}
catch (ExecutionException e) {
Throwable rootCause = Throwables.getRootCause(e);
assertTrue(rootCause instanceof IllegalArgumentException);
assertTrue(rootCause.getMessage().startsWith("Type can not be coerced to a Thrift type"));
}
}
private ThriftServer createSyncServer()
throws InstantiationException, IllegalAccessException, TException
{
DelayedMapSyncHandler handler = new DelayedMapSyncHandler();
handler.putValueSlowly(0, TimeUnit.MILLISECONDS, "testKey", "default");
return createServerFromHandler(handler);
}
/**
* Verify that a {@link Throwable} is a {@link TTransportException} wrapping the expected cause
* @param throwable The {@link Throwable} to check
* @param expectedCause The expected cause of the {@link TTransportException}
*/
private void checkTransportException(Throwable throwable, Class<? extends Throwable> expectedCause)
{
assertNotNull(throwable);
Throwable cause = throwable.getCause();
if (!(throwable instanceof TTransportException)) {
fail("Exception of type " + throwable.getClass() + " when expecting a TTransportException");
}
else if (!(expectedCause.isAssignableFrom(throwable.getCause().getClass()))) {
fail("TTransportException caused by " + cause.getClass() +
" when expecting a TTransportException caused by " + expectedCause);
}
}
@BeforeMethod(alwaysRun = true)
public void setup()
throws IllegalAccessException, InstantiationException, TException
{
codecManager = new ThriftCodecManager();
clientManager = new ThriftClientManager(codecManager);
syncServer = createSyncServer();
}
@AfterMethod(alwaysRun = true)
public void tearDown()
{
syncServer.close();
clientManager.close();
}
}