/*
* 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.tomcat.websocket;
import java.nio.ByteBuffer;
import java.util.concurrent.Semaphore;
import jakarta.websocket.OnMessage;
import jakarta.websocket.RemoteEndpoint.Async;
import jakarta.websocket.SendHandler;
import jakarta.websocket.SendResult;
import jakarta.websocket.Session;
import jakarta.websocket.server.ServerEndpoint;
import org.apache.tomcat.websocket.server.TesterEndpointConfig;
public class TesterAsyncTiming {
public static class Config extends TesterEndpointConfig {
public static final String PATH = "/timing";
public static final int ITERATIONS = 500;
public static final int SLEEP_MILLI = 50;
@Override
protected Class<?> getEndpointClass() {
return Endpoint.class;
}
}
@ServerEndpoint(Config.PATH)
public static class Endpoint {
private static final ByteBuffer LARGE_DATA = ByteBuffer.allocate(16 * 1024);
private static final ByteBuffer SMALL_DATA = ByteBuffer.allocate(4 * 1024);
@OnMessage
public void onMessage(Session session, @SuppressWarnings("unused") String text) {
Semaphore semaphore = new Semaphore(1);
SendHandler handler = new SemaphoreSendHandler(semaphore);
Async remote = session.getAsyncRemote();
for (int i = 0; i < Config.ITERATIONS; i++) {
try {
semaphore.acquire(1);
remote.sendBinary(LARGE_DATA, handler);
semaphore.acquire(1);
remote.sendBinary(SMALL_DATA, handler);
Thread.sleep(Config.SLEEP_MILLI);
LARGE_DATA.flip();
SMALL_DATA.flip();
} catch (InterruptedException e) {
throw new IllegalStateException(e);
}
}
}
private static class SemaphoreSendHandler implements SendHandler {
private final Semaphore semaphore;
private SemaphoreSendHandler(Semaphore semaphore) {
this.semaphore = semaphore;
}
@Override
public void onResult(SendResult result) {
semaphore.release();
}
}
}
}