[英]How to use log4j2 JMSAppender with ActiveMQ
我正在努力编写一个简单的POC程序来将消息记录到队列中。 我发现的所有教程和问答( 此处和此处 )均使用log4j 1.2版,并且它们将消息放入主题而不是队列中。 我的要求是登录到队列。
我遵循了官方网站上提到的文档,但无法使其正常运行。
我的类路径上有log4j2和ActiveMQ JAR,我创建了队列“ logQueue”,能够在ActiveMQ Web控制台中看到该队列,当我尝试执行该程序来编写日志时,出现以下错误:
ERROR Error creating JmsManager using ConnectionFactory [ConnectionFactory] and Destination [logQueue]. javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:662)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:313)
显然看起来像是一些JNDI问题,但无法弄清楚是什么。 根据log4j 1.2教程,我还将jndi.properties文件添加到类路径中,其值是
queue.logQueue=logQueue
但这显然没有帮助。 下面是我的log4j2.xml
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="warn" name="MyApp" packages="">
<Appenders>
<JMS name="jmsQueue" destinationBindingName="logQueue"
factoryBindingName="ConnectionFactory"
providerURL="tcp://localhost:61616"/>
</Appenders>
<Loggers>
<Root level="all">
<AppenderRef ref="jmsQueue"/>
</Root>
</Loggers>
</Configuration>
谢谢 !
将factoryName="org.apache.activemq.jndi.ActiveMQInitialContextFactory"
添加到JMS元素即可解决此问题。
log4j2.xml中的最后一个JMS元素如下所示:
<JMS name="jmsQueue" destinationBindingName="logQueue"
factoryName="org.apache.activemq.jndi.ActiveMQInitialContextFactory"
factoryBindingName="ConnectionFactory"
providerURL="tcp://localhost:61616"/>
在追加程序初始化期间出现错误,因此我尝试编写自己的脚本,而不使用现有的xml配置。
依赖版本:
Java类:
复制课程并将其放在项目中的任何位置,
package com.towersoft.eagleserver;
import java.io.Serializable;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.logging.log4j.core.Filter;
import org.apache.logging.log4j.core.Layout;
import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.core.appender.AbstractAppender;
import org.apache.logging.log4j.core.config.plugins.Plugin;
import org.apache.logging.log4j.core.config.plugins.PluginAttribute;
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.PatternLayout;
@Plugin(name = "JMSQueueAppender", category = "Core", elementType = "appender", printObject = true)
public class JMSQueueAppender extends AbstractAppender {
// private static Logger logger = Logger.getLogger("JMSQueueAppender");
private String brokerUri = "failover://tcp://localhost:61616";
private String queueName = "logQueue";
Session session;
ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(this.brokerUri);
javax.jms.Connection connection;
Destination destination;
MessageProducer producer;
private void init() {
try {
connection = connectionFactory.createConnection();
connection.start();
// Create a Session
session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
destination = session.createQueue(this.queueName);
producer = session.createProducer(destination);
producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
} catch (Exception e) {
e.printStackTrace();
}
}
protected JMSQueueAppender(String name, Filter filter,
Layout<? extends Serializable> layout, final boolean ignoreExceptions) {
super(name, filter, layout, ignoreExceptions);
init();
}
@Override
public void append(LogEvent le) {
try {
if (connection == null) {
init();
}
TextMessage message = session.createTextMessage(le.getMessage().getFormattedMessage());
// Tell the producer to send the message
producer.send(message);
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void stop() {
super.stop();
try {
session.close();
connection.close();
} catch (Exception e) {
e.printStackTrace();
}
}
@PluginFactory
public static JMSQueueAppender createAppender(
@PluginAttribute("name") String name,
@PluginElement("Layout") Layout<? extends Serializable> layout,
@PluginElement("Filter") final Filter filter) {
if (name == null) {
LOGGER.error("No name provided for MyCustomAppenderImpl");
return null;
}
if (layout == null) {
layout = PatternLayout.createDefaultLayout();
}
return new JMSQueueAppender(name, filter, layout, true);
}
}
log4j2.xml :
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
<Appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
</Console>
<JMSQueueAppender name="jmsQueue"/>
</Appenders>
<Loggers>
<Root level="debug">
<AppenderRef ref="Console"/>
<AppenderRef ref="jmsQueue"/>
</Root>
<Logger name="org.quartz" level="ERROR"/>
<Logger name="com.zaxxer" level="ERROR"/>
<Logger name="org.apache.activemq" level="ERROR"/>
</Loggers>
</Configuration>
我确实有这个问题。 通过将文件添加到我的Maven资源目录中名为jndi.properties的内容来解决...
topic.logTopic=logTopic
queue.logQueue=logQueue
显然,可以修改实际使用的名称。 就我而言,我的appender可能是...
<JMS name="jmsQueue"
destinationBindingName="logQueue"
factoryName="org.apache.activemq.jndi.ActiveMQInitialContextFactory"
factoryBindingName="ConnectionFactory"
providerURL="tcp://localhost:61616"
userName="admin"
password="admin">
<SyslogLayout />
</JMS>
注意:我必须修改附加程序的布局,以避免序列化错误(其他可能的值是... JSONLayout,YamlLayout,HtmlLayout等)。
希望这可以帮助。
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