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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.tuscany.sca.itest;
import java.util.concurrent.atomic.AtomicInteger;
import org.junit.Assert;
import org.oasisopen.sca.annotation.Reference;
import org.oasisopen.sca.annotation.Service;
/**
* This is the client implementation for the call backs in a separate thread tests
*/
@Service(CallBackSeparateThreadClient.class)
public class CallBackSeparateThreadClientImpl implements CallBackSeparateThreadClient, EventProcessorCallBack {
/**
* Max time to wait to receive events. If not all the events are received then timeout.
*/
private static final int TIMEOUT = 30 * 1000;
/**
* Counts the number of fast call backs.
*/
private static final AtomicInteger FAST_CALLBACK_COUNT = new AtomicInteger();
/**
* Counts the number of slow call backs.
*/
private static final AtomicInteger SLOW_CALLBACK_COUNT = new AtomicInteger();
/**
* This is our injected reference to the EventProcessorService
*/
@Reference
protected EventProcessorService aCallBackService;
/**
* This tests call back patterns using separate threads.
*/
public void runTests() {
try {
// Register for fast call back
registerForFastCallback();
// Wait for a few fast call backs
System.out.println("Waiting for some fast call backs");
waitForSomeFastCallbacks();
try {
// Register for slow call back
registerForSlowCallback();
// Wait for a few fast call backs
System.out.println("Waiting for some fast calls");
waitForSomeFastCallbacks();
// Wait for a few slow call backs
System.out.println("Waiting for some slow calls");
waitForSomeSlowCallbacks();
} finally {
unregisterForSlowCallback();
}
System.out.println("Done");
} finally {
unregisterForFastCallback();
}
}
/**
* Waits for some fast call backs to be fired
*/
private void waitForSomeFastCallbacks() {
// Reset the fast call back count
FAST_CALLBACK_COUNT.set(0);
// Wait until we have 10 fast call backs or timeout occurs
final long start = System.currentTimeMillis();
do {
if (FAST_CALLBACK_COUNT.get() >= 10) {
System.out.println("Received enough fast notifications");
return;
}
try {
Thread.sleep(5);
} catch (InterruptedException e) {
Assert.fail("Unexpeceted exception " + e);
}
} while (System.currentTimeMillis() - start < TIMEOUT);
// If we get to here then we did not receive enough events
Assert.fail("Did not receive enough fast events");
}
/**
* Waits for some slow call backs to be fired
*/
private void waitForSomeSlowCallbacks() {
// Reset the slow call back count
SLOW_CALLBACK_COUNT.set(0);
// Wait until we have 4 slow call backs or timeout
final long start = System.currentTimeMillis();
do {
if (SLOW_CALLBACK_COUNT.get() >= 4) {
System.out.println("Received enough slow notifications");
return;
}
try {
Thread.sleep(5);
} catch (InterruptedException e) {
Assert.fail("Unexpeceted exception " + e);
}
} while (System.currentTimeMillis() - start < TIMEOUT);
// If we get to here then we did not receive enough events
Assert.fail("Did not receive enough slow events");
}
/**
* Register to receive fast call backs
*/
private void registerForFastCallback() {
aCallBackService.registerForEvent("FAST");
}
/**
* Register to receive slow call backs
*/
private void registerForSlowCallback() {
aCallBackService.registerForEvent("SLOW");
}
/**
* Unregister to receive fast call backs
*/
private void unregisterForFastCallback() {
aCallBackService.unregisterForEvent("FAST");
}
/**
* Unregister to receive slow call backs
*/
private void unregisterForSlowCallback() {
aCallBackService.unregisterForEvent("SLOW");
}
/**
* Method that is called when an Event is delivered.
*
* @param aEventName The name of the Event
* @param aEventData The Event data
*/
public void eventNotification(String aEventName, Object aEventData) {
// System.out.println("Received Event : " + aEventName + " " + aEventData);
if (aEventName.equals("FAST")) {
final int newValue = FAST_CALLBACK_COUNT.incrementAndGet();
//System.out.println("Received total of " + newValue + " fast call backs");
} else if (aEventName.equals("SLOW")) {
final int newValue = SLOW_CALLBACK_COUNT.incrementAndGet();
//System.out.println("Received total of " + newValue + " slow call backs");
} else {
System.out.println("Unknown event type of " + aEventName);
}
}
}
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