我正在尝试使用 log4J JMSAppender 生成从 Log4J 通过 JMS 传送日志的概念证明。我已经尝试过 ActiveMQ 及其随附的示例。我把这个例子拆开，使它更通用并与多个平台兼容。
看起来我已经全部完成了，因为我可以看到与 ActiveMQ 的连接正在发生，但是当我获得 InitialContext 时代码挂起（-Dlog4j.debug设置 ActiveMQ 客户端类似乎调用 log4J 并加载属性，而这些属性反过来尝试为 JMSAppender 建立与 JMS 的连接）然后代码就挂起。我试图通过仅定义单个命名记录器的附加程序来隔离指向 JMS 的日志消息，并且org.apache.activemq包配置为使用ConsoleAppender
当指向配置了 JMS 队列的 Weblogic Server 时，相同的代码可以正常工作，但为了获得最大的兼容性，我需要尝试使其与 ActiveMQ 一起工作
我是否缺少一些“神奇”的配置来使 ActiveMQ 正常工作？
- 到目前为止工作中的一些示例片段来充实这个问题现在我手头有代码
log4j-jms.properties
log4j.rootLogger=INFO, stdout
## Be sure that ActiveMQ messages are not logged to 'jms' appender
log4j.logger.org.apache=ERROR, stdout
log4j.logger.javax=ERROR,stdout
log4j.logger.java=ERROR,stdout
log4j.logger.demo=DEBUG,jms
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %-5p %c - %m%n
## Configure 'jms' appender. You'll also need jndi.properties file in order to make it work
log4j.appender.jms=org.apache.log4j.net.JMSAppender
log4j.appender.jms.InitialContextFactoryName=org.apache.activemq.jndi.ActiveMQInitialContextFactory
log4j.appender.jms.ProviderURL=tcp://localhost:61616
log4j.appender.jms.TopicBindingName=topic.logTopic
log4j.appender.jms.TopicConnectionFactoryBindingName=ConnectionFactory
这样做的目的是创建一个命名的 appender 'demo' 并在示例代码中抓取它来记录以确保 activemq 日志不会尝试将自身发送到 JMS
代码示例。它有点乱，因为我一直在用它来尝试使事情正常进行。就目前而言，当我将它指向 Weblogic 时它会起作用，并类似地切换 log4j 配置。此代码中的对象是确保我让主题的侦听器在单独的线程中运行
NewLog4jJMSAppenderExample.java
import javax.jms.*;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.apache.log4j.Logger;
import org.apache.log4j.spi.LoggingEvent;
import java.util.Properties;
/**
* A simple example of log4j jms appender in conjuction with ActiveMQ
*/
public class NewLog4jJMSAppenderExample {
Runnable listener;
Thread runner;
private enum MQImplementation {
ActiveMQ, Weblogic
};
public NewLog4jJMSAppenderExample() {
// create a logTopic topic consumer
listener = new BigEars();
System.out.println("******* Listener Created **********");
runner = new Thread(listener);
runner.start();
try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
}
public static void main(String[] args) throws Exception {
System.out.println("******* I HAVE STARTED **********");
new NewLog4jJMSAppenderExample();
System.out.println("******* LOGGING **********");
// log a message
Logger log = Logger.getLogger("demo");
log.error("Test log");
Thread.sleep(100000);
System.exit(1);
}
public class BigEars implements Runnable, MessageListener {
ConnectionFactory factory;
Connection conn;
Session sess;
MessageConsumer consumer;
public BigEars() {
MQImplementation inUse = MQImplementation.ActiveMQ;
System.out.println("Constructing Bigears");
try {
Properties env = new Properties();
switch (inUse) {
case Weblogic:
env.put(Context.INITIAL_CONTEXT_FACTORY,
"weblogic.jndi.WLInitialContextFactory");
env.put(Context.PROVIDER_URL,
"t3://localhost:7001");
break;
case ActiveMQ:
env.put(Context.INITIAL_CONTEXT_FACTORY,
"org.apache.activemq.jndi.ActiveMQInitialContextFactory");
env.put(Context.PROVIDER_URL,
"tcp://localhost:61616");
break;
}
System.out.println("Initial Context");
InitialContext jndi = new InitialContext(env);
System.out.println("Factory");
factory = (TopicConnectionFactory) jndi.lookup("ConnectionFactory");
Topic theTopic = (Topic) jndi.lookup("topic.logTopic");
System.out.println("Connection");
conn = factory.createConnection();
System.out.println("******* I HAVE set up and created connection **********");
System.out.println("session");
sess = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
System.out.println("consumer");
consumer = sess.createConsumer(theTopic);
System.out.println("listener");
consumer.setMessageListener(this);
conn.start();
} catch (JMSException jme) {
System.out.println(jme);
} catch (NamingException ne) {
System.out.println(ne);
}
}
public void run() {
try {
System.out.println("******* zzzzzzzz! **********");
Thread.sleep(100000);
} catch (Exception e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
}
public void onMessage(Message message) {
try {
try {
System.out.println("******* I GOT A MESSAGE **********");
// receive log event in your consumer
System.out.println(message.toString());
LoggingEvent event = (LoggingEvent) (((ObjectMessage) message).getObject());
System.out.println("Received log [" + event.getLevel() + "]: " + event.getMessage());
} catch (Exception e) {
e.printStackTrace();
}
} finally {
try {
consumer.close();
sess.close();
conn.close();
} catch (JMSException jme) {
System.out.println(jme);
}
}
}
} }
设置 -Dlog4j.debug 时显示的日志记录
******* I HAVE STARTED **********
Constructing Bigears
Initial Context
log4j: Trying to find [log4j-jms.properties] using context classloader sun.misc.Launcher$AppClassLoader@2c2bbd86.
log4j: Using URL [file:/Users/kevin/Desktop/apache-activemq-5.3.0/example/target/classes/log4j-jms.properties] for automatic log4j configuration.
log4j: Reading configuration from URL file:/Users/kevin/Desktop/apache-activemq-5.3.0/example/target/classes/log4j-jms.properties
log4j: Parsing for [root] with value=[INFO, stdout].
log4j: Level token is [INFO].
log4j: Category root set to INFO
log4j: Parsing appender named "stdout".
log4j: Parsing layout options for "stdout".
log4j: Setting property [conversionPattern] to [%d %-5p %c - %m%n].
log4j: End of parsing for "stdout".
log4j: Parsed "stdout" options.
log4j: Parsing for [org.apache] with value=[ERROR, stdout].
log4j: Level token is [ERROR].
log4j: Category org.apache set to ERROR
log4j: Parsing appender named "stdout".
log4j: Appender "stdout" was already parsed.
log4j: Handling log4j.additivity.org.apache=[null]
log4j: Parsing for [demo] with value=[DEBUG,jms].
log4j: Level token is [DEBUG].
log4j: Category demo set to DEBUG
log4j: Parsing appender named "jms".
log4j: Setting property [initialContextFactoryName] to [org.apache.activemq.jndi.ActiveMQInitialContextFactory].
log4j: Setting property [topicBindingName] to [topic.logTopic].
log4j: Setting property [topicConnectionFactoryBindingName] to [ConnectionFactory].
log4j: Setting property [providerURL] to [tcp://localhost:61616].
log4j: Getting initial context.
log4j: Looking up [ConnectionFactory]
log4j: About to create TopicConnection.
log4j: Creating TopicSession, non-transactional, in AUTO_ACKNOWLEDGE mode.
在这里它只是挂起并最终超时