org.apache.inlong.sort.filesystem.shaded.com.amazonaws.monitoring.internal.AgentMonitoringListener Maven / Gradle / Ivy
/*
* Copyright 2010-2022 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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.amazonaws.monitoring.internal;
import com.amazonaws.SdkClientException;
import com.amazonaws.annotation.SdkInternalApi;
import com.amazonaws.annotation.SdkTestInternalApi;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.channels.DatagramChannel;
import com.amazonaws.monitoring.MonitoringEvent;
import com.amazonaws.monitoring.MonitoringListener;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* An implementation of the Monitoring Listener Interface that streams monitoring events to a local agent.
*/
@SdkInternalApi
public final class AgentMonitoringListener extends MonitoringListener {
private static final Log LOG = LogFactory.getLog(AgentMonitoringListener.class);
private static final String SIMPLE_NAME = "AgentMonitoringListener";
private static final int MAX_BUFFER_SIZE = 8192;
private AsynchronousAgentDispatcher dispatcher;
private final DatagramChannel channel;
private final int maxSize;
/**
* Initialize AgentMonitoringListener.
*
* @param port the port of the local agent
* @throws SdkClientException
*/
public AgentMonitoringListener(String host, int port) throws SdkClientException {
try {
this.dispatcher = AsynchronousAgentDispatcher.getInstance();
this.dispatcher.init();
channel = DatagramChannel.open();
channel.configureBlocking(false);
if (channel.socket().getSendBufferSize() < MAX_BUFFER_SIZE) {
channel.socket().setSendBufferSize(MAX_BUFFER_SIZE);
}
//SO_SNDBUF is just a hint and it is implementation specific if the packet is sent or discarded.
maxSize = Math.min(MAX_BUFFER_SIZE, channel.socket().getSendBufferSize());
if (maxSize < MAX_BUFFER_SIZE && LOG.isDebugEnabled()) {
LOG.debug(String.format("System socket buffer size %d is less than 8K. Any events larger than the buffer size "
+ "will be dropped", maxSize));
}
channel.connect(new InetSocketAddress(host, port));
} catch (Exception e) {
if (this.dispatcher != null) {
this.dispatcher.release();
}
throw new SdkClientException("Failed to initialize AgentMonitoringListener", e);
}
}
/** Used for unit test */
@SdkTestInternalApi
AgentMonitoringListener(DatagramChannel channel, AsynchronousAgentDispatcher dispatcher, int maxSize) {
this.channel = channel;
this.dispatcher = dispatcher;
this.maxSize = maxSize;
}
@Override
public void handleEvent(MonitoringEvent event) {
dispatcher.addWriteTask(event, channel, maxSize);
}
@Override
public String toString() {
return SIMPLE_NAME;
}
public void shutdown() {
dispatcher.release();
try {
channel.close();
} catch (IOException ioe) {
LOG.error("Could not close datagram channel", ioe);
}
}
}