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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.logging.log4j.core.appender;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
import org.apache.logging.log4j.core.Filter;
import org.apache.logging.log4j.core.Layout;
import org.apache.logging.log4j.core.config.Configuration;
import org.apache.logging.log4j.core.config.plugins.Plugin;
import org.apache.logging.log4j.core.config.plugins.PluginAliases;
import org.apache.logging.log4j.core.config.plugins.PluginAttribute;
import org.apache.logging.log4j.core.config.plugins.PluginConfiguration;
import org.apache.logging.log4j.core.config.plugins.PluginElement;
import org.apache.logging.log4j.core.config.plugins.PluginFactory;
import org.apache.logging.log4j.core.layout.SerializedLayout;
import org.apache.logging.log4j.core.net.AbstractSocketManager;
import org.apache.logging.log4j.core.net.Advertiser;
import org.apache.logging.log4j.core.net.DatagramSocketManager;
import org.apache.logging.log4j.core.net.Protocol;
import org.apache.logging.log4j.core.net.SslSocketManager;
import org.apache.logging.log4j.core.net.TcpSocketManager;
import org.apache.logging.log4j.core.net.ssl.SslConfiguration;
import org.apache.logging.log4j.core.util.Booleans;
import org.apache.logging.log4j.util.EnglishEnums;
/**
* An Appender that delivers events over socket connections. Supports both TCP and UDP.
*/
@Plugin(name = "Socket", category = "Core", elementType = "appender", printObject = true)
public class SocketAppender extends AbstractOutputStreamAppender {
private static final long serialVersionUID = 1L;
private Object advertisement;
private final Advertiser advertiser;
protected SocketAppender(final String name, final Layout layout, final Filter filter,
final AbstractSocketManager manager, final boolean ignoreExceptions, final boolean immediateFlush,
final Advertiser advertiser) {
super(name, layout, filter, ignoreExceptions, immediateFlush, manager);
if (advertiser != null) {
final Map configuration = new HashMap(layout.getContentFormat());
configuration.putAll(manager.getContentFormat());
configuration.put("contentType", layout.getContentType());
configuration.put("name", name);
this.advertisement = advertiser.advertise(configuration);
}
this.advertiser = advertiser;
}
@Override
public void stop() {
super.stop();
if (this.advertiser != null) {
this.advertiser.unadvertise(this.advertisement);
}
}
/**
*
* @param host
* The name of the host to connect to.
* @param portNum
* The port to connect to on the target host.
* @param protocolStr
* The Protocol to use.
* @param sslConfig
* The SSL configuration file for TCP/SSL, ignored for UPD.
* @param connectTimeoutMillis
* the connect timeout in milliseconds.
* @param delayMillis
* The interval in which failed writes should be retried.
* @param immediateFail
* True if the write should fail if no socket is immediately available.
* @param name
* The name of the Appender.
* @param immediateFlush
* "true" if data should be flushed on each write.
* @param ignore
* If {@code "true"} (default) exceptions encountered when appending events are logged; otherwise they are
* propagated to the caller.
* @param layout
* The layout to use (defaults to SerializedLayout).
* @param filter
* The Filter or null.
* @param advertise
* "true" if the appender configuration should be advertised, "false" otherwise.
* @param config
* The Configuration
* @return A SocketAppender.
*/
@PluginFactory
public static SocketAppender createAppender(
// @formatter:off
@PluginAttribute("host") final String host,
@PluginAttribute("port") final String portNum,
@PluginAttribute("protocol") final String protocolStr,
@PluginElement("SSL") final SslConfiguration sslConfig,
@PluginAttribute(value = "connectTimeoutMillis", defaultInt = 0) final int connectTimeoutMillis,
@PluginAliases("reconnectionDelay") // deprecated
@PluginAttribute("reconnectionDelayMillis") final String delayMillis,
@PluginAttribute("immediateFail") final String immediateFail,
@PluginAttribute("name") final String name,
@PluginAttribute("immediateFlush") final String immediateFlush,
@PluginAttribute("ignoreExceptions") final String ignore,
@PluginElement("Layout") Layout layout,
@PluginElement("Filter") final Filter filter,
@PluginAttribute("advertise") final String advertise, @PluginConfiguration final Configuration config) {
// @formatter:on
boolean isFlush = Booleans.parseBoolean(immediateFlush, true);
final boolean isAdvertise = Boolean.parseBoolean(advertise);
final boolean ignoreExceptions = Booleans.parseBoolean(ignore, true);
final boolean fail = Booleans.parseBoolean(immediateFail, true);
final int reconnectDelayMillis = AbstractAppender.parseInt(delayMillis, 0);
final int port = AbstractAppender.parseInt(portNum, 0);
if (layout == null) {
layout = SerializedLayout.createLayout();
}
if (name == null) {
LOGGER.error("No name provided for SocketAppender");
return null;
}
final Protocol protocol = EnglishEnums.valueOf(Protocol.class,
protocolStr != null ? protocolStr : Protocol.TCP.name());
if (protocol == Protocol.UDP) {
isFlush = true;
}
final AbstractSocketManager manager = createSocketManager(name, protocol, host, port, connectTimeoutMillis,
sslConfig, reconnectDelayMillis, fail, layout);
return new SocketAppender(name, layout, filter, manager, ignoreExceptions, isFlush,
isAdvertise ? config.getAdvertiser() : null);
}
/**
* Creates an AbstractSocketManager for TCP, UDP, and SSL.
*
* @throws IllegalArgumentException
* if the protocol cannot be handled.
*/
protected static AbstractSocketManager createSocketManager(final String name, Protocol protocol, final String host,
final int port, int connectTimeoutMillis, final SslConfiguration sslConfig, final int delayMillis,
final boolean immediateFail, final Layout layout) {
if (protocol == Protocol.TCP && sslConfig != null) {
// Upgrade TCP to SSL if an SSL config is specified.
protocol = Protocol.SSL;
}
if (protocol != Protocol.SSL && sslConfig != null) {
LOGGER.info("Appender {} ignoring SSL configuration for {} protocol", name, protocol);
}
switch (protocol) {
case TCP:
return TcpSocketManager.getSocketManager(host, port, connectTimeoutMillis, delayMillis, immediateFail,
layout);
case UDP:
return DatagramSocketManager.getSocketManager(host, port, layout);
case SSL:
return SslSocketManager.getSocketManager(sslConfig, host, port, connectTimeoutMillis, delayMillis,
immediateFail, layout);
default:
throw new IllegalArgumentException(protocol.toString());
}
}
}
