org.apache.dubbo.remoting.transport.dispatcher.connection.ConnectionOrderedChannelHandler Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of dubbo Show documentation
Show all versions of dubbo Show documentation
The all in one project of dubbo
/*
* 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.dubbo.remoting.transport.dispatcher.connection;
import org.apache.dubbo.common.URL;
import org.apache.dubbo.common.threadpool.support.AbortPolicyWithReport;
import org.apache.dubbo.common.utils.NamedThreadFactory;
import org.apache.dubbo.remoting.Channel;
import org.apache.dubbo.remoting.ChannelHandler;
import org.apache.dubbo.remoting.ExecutionException;
import org.apache.dubbo.remoting.RemotingException;
import org.apache.dubbo.remoting.exchange.Request;
import org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable;
import org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.ChannelState;
import org.apache.dubbo.remoting.transport.dispatcher.WrappedChannelHandler;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import static org.apache.dubbo.common.constants.CommonConstants.DEFAULT_THREAD_NAME;
import static org.apache.dubbo.common.constants.CommonConstants.THREAD_NAME_KEY;
import static org.apache.dubbo.common.constants.LoggerCodeConstants.TRANSPORT_CONNECTION_LIMIT_EXCEED;
import static org.apache.dubbo.remoting.Constants.CONNECT_QUEUE_CAPACITY;
import static org.apache.dubbo.remoting.Constants.CONNECT_QUEUE_WARNING_SIZE;
import static org.apache.dubbo.remoting.Constants.DEFAULT_CONNECT_QUEUE_WARNING_SIZE;
public class ConnectionOrderedChannelHandler extends WrappedChannelHandler {
protected final ThreadPoolExecutor connectionExecutor;
private final int queueWarningLimit;
public ConnectionOrderedChannelHandler(ChannelHandler handler, URL url) {
super(handler, url);
String threadName = url.getParameter(THREAD_NAME_KEY, DEFAULT_THREAD_NAME);
connectionExecutor = new ThreadPoolExecutor(1, 1,
0L, TimeUnit.MILLISECONDS,
new LinkedBlockingQueue<>(url.getPositiveParameter(CONNECT_QUEUE_CAPACITY, Integer.MAX_VALUE)),
new NamedThreadFactory(threadName, true),
new AbortPolicyWithReport(threadName, url)
); // FIXME There's no place to release connectionExecutor!
queueWarningLimit = url.getParameter(CONNECT_QUEUE_WARNING_SIZE, DEFAULT_CONNECT_QUEUE_WARNING_SIZE);
}
@Override
public void connected(Channel channel) throws RemotingException {
try {
checkQueueLength();
connectionExecutor.execute(new ChannelEventRunnable(channel, handler, ChannelState.CONNECTED));
} catch (Throwable t) {
throw new ExecutionException("connect event", channel, getClass() + " error when process connected event .", t);
}
}
@Override
public void disconnected(Channel channel) throws RemotingException {
try {
checkQueueLength();
connectionExecutor.execute(new ChannelEventRunnable(channel, handler, ChannelState.DISCONNECTED));
} catch (Throwable t) {
throw new ExecutionException("disconnected event", channel, getClass() + " error when process disconnected event .", t);
}
}
@Override
public void received(Channel channel, Object message) throws RemotingException {
ExecutorService executor = getPreferredExecutorService(message);
try {
executor.execute(new ChannelEventRunnable(channel, handler, ChannelState.RECEIVED, message));
} catch (Throwable t) {
if (message instanceof Request && t instanceof RejectedExecutionException) {
sendFeedback(channel, (Request) message, t);
return;
}
throw new ExecutionException(message, channel, getClass() + " error when process received event .", t);
}
}
@Override
public void caught(Channel channel, Throwable exception) throws RemotingException {
ExecutorService executor = getSharedExecutorService();
try {
executor.execute(new ChannelEventRunnable(channel, handler, ChannelState.CAUGHT, exception));
} catch (Throwable t) {
throw new ExecutionException("caught event", channel, getClass() + " error when process caught event .", t);
}
}
private void checkQueueLength() {
if (connectionExecutor.getQueue().size() > queueWarningLimit) {
logger.warn(TRANSPORT_CONNECTION_LIMIT_EXCEED, "", "", "connectionordered channel handler queue size: " + connectionExecutor.getQueue().size() + " exceed the warning limit number :" + queueWarningLimit);
}
}
}