通过在Web应用WEB-INF目录下的server-config.wsdd文件中添加Handler配置实现
一、记录所有WebService的SOAP消息（全局配置方式）
<?xml version="1.0" encoding="UTF-8"?> <deployment xmlns="http://xml.apache.org/axis/wsdd/" xmlns:java="http://xml.apache.org/axis/wsdd/providers/java"> <handler name="URLMapper" type="java:org.apache.axis.handlers.http.URLMapper" /> <!-- （1）Axis自带的LogHandler配置 --> <handler name="log" type="java:org.apache.axis.handlers.LogHandler"> <parameter name="LogHandler.fileName" value="C:\axis.log" /> <!-- 目录必须存在 --> </handler> <!-- （2）全局配置 --> <globalConfiguration> <parameter name="disablePrettyXML" value="false" /> <requestFlow> <handler type="LogHandler" /> </requestFlow> <responseFlow> <handler type="LogHandler" /> </responseFlow> </globalConfiguration> <!-- 自定义的WebService配置 --> <service name="HelloWordWSDD" provider="java:RPC"> <requestFlow> <chain type="HelloWorldChain" /> </requestFlow> <parameter name="allowedMethods" value="*" /> <parameter name="scope" value="request" /> <parameter name="className" value="com.yakoo5.axis.ws.HelloWordWSDD" /> </service> <!-- （3）transport配置 --> <transport name="http" pivot="java:org.apache.axis.transport.http.HTTPSender" /> <transport name="local" pivot="java:org.apache.axis.transport.local.LocalSender" /> <transport name="java" pivot="java:org.apache.axis.transport.java.JavaSender" /> </deployment>
二、仅记录特定WebService的SOAP消息（局部配置）
<?xml version="1.0" encoding="UTF-8"?> <deployment xmlns="http://xml.apache.org/axis/wsdd/" xmlns:java="http://xml.apache.org/axis/wsdd/providers/java"> <handler name="URLMapper" type="java:org.apache.axis.handlers.http.URLMapper" /> <!-- （1）Axis自带的LogHandler配置 --> <handler name="log" type="java:org.apache.axis.handlers.LogHandler"> <parameter name="LogHandler.fileName" value="C:\axis.log" /> <!-- 目录必须存在 --> </handler> <!-- 自定义的WebService配置 --> <service name="HelloWordWSDD" provider="java:RPC"> <!-- （2）局部配置 --> <requestFlow> <handler type="LogHandler" /> <chain type="HelloWorldChain" /> </requestFlow> <responseFlow> <handler type="LogHandler" /> </responseFlow> <parameter name="allowedMethods" value="*" /> <parameter name="scope" value="request" /> <parameter name="className" value="com.yakoo5.axis.ws.HelloWordWSDD" /> </service> <!-- （3）transport配置 --> <transport name="http" pivot="java:org.apache.axis.transport.http.HTTPSender" /> <transport name="local" pivot="java:org.apache.axis.transport.local.LocalSender" /> <transport name="java" pivot="java:org.apache.axis.transport.java.JavaSender" /> </deployment>
三、Axis自带LogHandler的不足
Axis的LogHandler实际上是通过FileWriter来构建字符输出流来输出日志内容，由于是直接通过FileWriter写入文件，因此也无法实现类似于Log4j的日志大小控制、滚动日志等功能。
通过Axis 1.4的LogHandler类的源码可以知道LogHandler调用自身的logMessages方法来记录SOAP消息，源码如下：
private void logMessages(MessageContext msgContext) throws AxisFault {
try {
PrintWriter writer = null;
writer = getWriter();
Message inMsg = msgContext.getRequestMessage();
Message outMsg = msgContext.getResponseMessage();
writer.println( "=======================================================" );
if (start != -1) {
writer.println( "= " + Messages.getMessage("elapsed00","" + (System.currentTimeMillis() - start)));
}
writer.println( "= " + Messages.getMessage("inMsg00",(inMsg == null ? "null" : inMsg.getSOAPPartAsstring())));
writer.println( "= " + Messages.getMessage("outMsg00",(outMsg == null ? "null" : outMsg.getSOAPPartAsstring())));
writer.println( "=======================================================" );
//START FIX: http://nagoya.apache.org/bugzilla/show_bug.cgi?id=16646
if (!writetoConsole) {
writer.close();
}
//END FIX: http://nagoya.apache.org/bugzilla/show_bug.cgi?id=16646
} catch( Exception e ) {
log.error( Messages.getMessage("exception00"),e );
throw AxisFault.makeFault(e);
}
}
logMessages方法实际上试通过getWriter()返回的一个PrintWriter来打印日志，getWriter()方法源码如下：
private PrintWriter getWriter() throws IOException {
PrintWriter writer;
// Allow config info to control where we write.
if (writetoConsole) {
// Writing to the console
writer = new PrintWriter(System.out);
} else {
// Writing to a file.
if (filename == null) {
filename = "axis.log";
}
writer = new PrintWriter(new FileWriter( filename,true ));
}
return writer;
}
PrintWriter通过传入的FileWriter来构建字符输出流输出日志内容，自然也无法实现类似于Log4j的日志大小控制、滚动日志等功能。
下面我们通过使用common-logging和lo4j日志组件来改进这个LogHandler。
四、改进的MyLogHandler（实现日志大小控制、滚动日志等功能）
通过Apache的common-logging来替换原有的PrintWriter记录SOAP消息，源码如下：
package yakoo5.ws.axis.handlers;
import org.apache.axis.AxisFault;
import org.apache.axis.Message;
import org.apache.axis.MessageContext;
import org.apache.axis.components.logger.LogFactory;
import org.apache.axis.handlers.BasicHandler;
import org.apache.axis.utils.Messages;
import org.apache.commons.logging.Log;
/**
* Axis 1.x LogHandler 记录WebService交互的request和response soap报文<br>
* <p>
* 作为Axis 1.x提供的{@link org.apache.axis.handlers.LogHandler}的替换， 可将SOAP消息记录到commons-logging组件的日志实现组件配置的日志文件中。
* </p>
*
* @author <a href="mailto:[email protected]">yakoo5</a>
*/
public class MyLogHandler extends BasicHandler {
private static final long serialVersionUID = 1L;
protected static Log log = LogFactory.getLog(LogHandler.class.getName());
long start = -1;
/*
* (non-Javadoc)
* @see org.apache.axis.Handler#invoke(org.apache.axis.MessageContext)
*/
@Override
public void invoke(MessageContext msgContext) throws AxisFault {
log.debug("Enter: LogHandler::invoke");
if (msgContext.getPastPivot() == false) {
start = System.currentTimeMillis();
} else {
logMessages(msgContext);
}
log.debug("Exit: LogHandler::invoke");
}
// 记录消息
private void logMessages(MessageContext msgContext) throws AxisFault {
try {
Message inMsg = msgContext.getRequestMessage();
Message outMsg = msgContext.getResponseMessage();
log.info("=======================================================");
if (start != -1) {
log.info("= " + Messages.getMessage("elapsed00","" + (System.currentTimeMillis() - start)));
}
log.info("= " + Messages.getMessage("inMsg00",(inMsg == null ? "null" : inMsg.getSOAPPartAsstring())));
log.info("= " + Messages.getMessage("outMsg00",(outMsg == null ? "null" : outMsg.getSOAPPartAsstring())));
log.info("=======================================================");
} catch (Exception e) {
log.error(Messages.getMessage("exception00"),e);
throw AxisFault.makeFault(e);
}
}
@Override
public void onFault(MessageContext msgContext) {
try {
logMessages(msgContext);
} catch (AxisFault axisFault) {
log.error(Messages.getMessage("exception00"),axisFault);
}
}
}
MyLogHandler的server-config.wsdd配置（同LogHandler）：
<handler name="LogHandler" type="java:yakoo5.ws.axis.handlers.MyLogHandler" />
具体的自定义的日志大小、日志文件数量、日志滚动配置可通过log4j的配置实现，log4j的配置可参考笔者转载的以下文章：
（1）log4j配置详解：http://www.voidcn.com/article/p-fyjwhhgx-gp.html ；
（2）log4j使用案例：http://www.voidcn.com/article/p-wyutogso-gp.html 。
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