我在JBoss AS 7.1.1.Final上部署的Spring 3.1.1.RELEASE应用程序中使用log4j 1.2.15.我正在尝试将log4j中写入的输出路由到我的响应输出流.我有这样写的输出
private static final Logger LOG = Logger.getLogger(TrainingSessionServiceImpl.class);
…
LOG.info("Creating/updating training session associated with order #:" + order.getId());
我正试图将它路由到我的输出流,如此…
@RequestMapping(value = "/refreshPd",method = RequestMethod.GET)
public void refreshPD(final HttpServletResponse response) throws IOException
{
...
final WriterAppender appender = new WriterAppender(new PatternLayout("%d{ISO8601} %p - %m%n"),response.getWriter());
appender.setName("CONSOLE_APPENDER");
appender.setThreshold(org.apache.log4j.Level.DEBUG);
Logger.getRootLogger().addAppender(appender);
worker.work();
Logger.getRootLogger().removeAppender("CONSOLE_APPENDER");
但遗憾的是,即使我知道(通过调试)日志语句被调用,也没有任何东西输出到我的浏览器.有谁知道如何调整我的设置以使其工作？下面是我的log4j.properties文件,部署到我的wAR的WEB-INF / classes目录.
log4j.rootLogger=DEBUG,CA,FA
#Console Appender
log4j.appender.CA=org.apache.log4j.ConsoleAppender
log4j.appender.CA.layout=org.apache.log4j.PatternLayout
log4j.appender.CA.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n
#File Appender
log4j.appender.FA=org.apache.log4j.FileAppender
log4j.appender.FA.File=/usr/java/jboss/server/default/log/log4j.log
log4j.appender.FA.layout=org.apache.log4j.PatternLayout
log4j.appender.FA.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n
# Set the logger level of File Appender to WARN
log4j.appender.FA.Threshold = DEBUG
谢谢,– 戴夫
最佳答案
这是一个有趣的问题.关键是要编写自己的appender.我查看了内置的org.apache.log4j.ConsoleAppender代码以获取灵感.我已经在我的tomcat中对此进行了测试并验证了它的工作原理.我用log4j-1.2.17(希望无所谓)
1)首先实现自己的appender.此appender会将所有日志事件写入当前线程的输出流
package com.tstwbprj.log;
import org.apache.log4j.Layout;
import org.apache.log4j.WriterAppender;
import java.io.IOException;
import java.io.OutputStream;
public class HttpLogAppender extends WriterAppender {
static ThreadLocal2)将此appender添加到log4j配置文件中,就像其他设置一样
log4j.rootLogger=DEBUG,FA,HA
..
log4j.appender.HA=com.tstwbprj.log.HttpLogAppender
log4j.appender.HA.layout=org.apache.log4j.PatternLayout
log4j.appender.HA.layout.ConversionPattern=%-4r [%t] %-5p %c %x – %m%n
3)在servlet中添加一小段代码,以便此appender正常工作.这是我的servlet.
import org.apache.log4j.Category;
import org.apache.log4j.Logger;
import javax.servlet.ServletOutputStream;
import java.io.IOException;
public class LogServlet extends javax.servlet.http.HttpServlet {
private static final Logger LOG = Logger.getLogger(LogServlet.class);
protected void doPost(javax.servlet.http.HttpServletRequest request,javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException,IOException {
}
protected void doGet(javax.servlet.http.HttpServletRequest request,IOException {
ServletOutputStream outstream = response.getOutputStream();
configureLogForCurrentRequest(outstream);
LOG.info("Got request");//this is now send to the servlet output stream !!
LOG.info("Hello!!");
LOG.info("Done!!");
}
private void configureLogForCurrentRequest(ServletOutputStream outstream) {
HttpLogAppender appender = (HttpLogAppender) LOG.getAppender("HA");
while (appender == null) {
Category parent = LOG.getParent();
if (parent == null) {
break; //This ideally shouldn't happen. Navigated all the way to root logger and still did not find appender !!..something wrong with log4j configuration setup
}
appender = (HttpLogAppender) parent.getAppender("HA");
}
appender.setCurrentHttpStream(outstream);
}
}
警告：这没有经过彻底的测试,特别是对于多个servlet请求等.也不确定为什么要这样做.将日志消息传递给浏览器并不常见.谨慎行事.. 原文链接：https://www.f2er.com/spring/432712.html
