JAX-WS的Handler和Servlet的Filter相似,可以對所有WebServicer進行攔截,在Handler中可以記錄日誌、權限控制、對請求的SOAP消息進行加密,解密等。JAX-WS提供兩個Handler接口,LogicalHandler和SOAPHandler。LogicalHandler處理的是Message Payload,只能夠訪問消息單元中的SOAP消息體。SOAPHandler處理的是整個SOAP消息(包含SOAP header和SOAP body),可以訪問整個SOAP消息。
註冊Handler的方式有下面幾種:
使用HandlerResolver(客戶端比較方便)
使用HandlerChain註解和配置文件
從WSDL生成
使用Custom Binding聲明HandlerChain
實例代碼http://download.csdn.net/detail/accountwcx/8922191
JAX-WS中WebService執行順序如圖所示
下面用SOAPHandler實現在WebService服務端記錄請求內容和響應內容。
import java.io.IOException;
import java.util.Set;
import javax.xml.namespace.QName;
import javax.xml.soap.SOAPException;
import javax.xml.soap.SOAPMessage;
import javax.xml.ws.handler.MessageContext;
import javax.xml.ws.handler.soap.SOAPHandler;
import javax.xml.ws.handler.soap.SOAPMessageContext;
/**
* 記錄SOAP請求及響應
* @author [email protected]
*
*/
public class LoggerHandler implements SOAPHandler<SOAPMessageContext> {
@Override
public void close(MessageContext context) {
}
@Override
public boolean handleFault(SOAPMessageContext context) {
return true;
}
@Override
public boolean handleMessage(SOAPMessageContext context) {
// 判斷消息是輸入還是輸出
Boolean output = (Boolean) context.get(MessageContext.MESSAGE_OUTBOUND_PROPERTY);
System.out.println(output ? "響應SOAP:" : "請求SOAP:");
SOAPMessage message = context.getMessage();
try {
message.writeTo(System.out);
} catch (SOAPException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
System.out.println("");
return true;
}
@Override
public Set<QName> getHeaders() {
return null;
}
}
在classpath下建handler-chain.xml配置文件
<?xml version="1.0" encoding="UTF-8"?>
<javaee:handler-chains xmlns:javaee="http://java.sun.com/xml/ns/javaee"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<javaee:handler-chain>
<javaee:handler>
<javaee:handler-class>com.rvho.server.ws.handler.LoggerHandler</javaee:handler-class>
</javaee:handler>
</javaee:handler-chain>
</javaee:handler-chains>
在服務實現類上添加HandlerChain配置
package com.rvho.server.ws.impl;
import java.util.Date;
import javax.jws.HandlerChain;
import javax.jws.WebService;
import com.rvho.server.ws.HelloWService;
@WebService(
endpointInterface = "com.rvho.server.ws.HelloWService",
portName = "HelloWSPort",
serviceName = "HelloWSService",
targetNamespace = "http://www.tmp.com/ws/hello"
)
@HandlerChain(file="handler-chain.xml") //添加Handler配置文件
public class HelloWServiceImpl implements HelloWService {
public String index() {
return "hello";
}
public Integer add(Integer x, Integer y) {
return x + y;
}
public Date now() {
return new Date();
}
}
服務實現接口
package com.rvho.server.ws;
import java.util.Date;
import javax.jws.WebService;
/**
* WebService接口
*/
@WebService(
name = "HelloWS",
targetNamespace = "http://www.tmp.com/ws/hello"
)
public interface HelloWService {
/**
* 返回字符串
*
* @return
*/
String index();
/**
* 兩個整數相加
*
* @param x
* @param y
* @return 相加後的值
*/
Integer add(Integer x, Integer y);
/**
* 返回當前時間
*
* @return
*/
Date now();
}
客戶端發起index請求,服務端的記錄
請求SOAP:
<S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Header/>
<S:Body>
<ns2:index xmlns:ns2="http://www.tmp.com/ws/hello" />
</S:Body>
</S:Envelope>
響應SOAP:
<S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Header/>
<S:Body>
<ns2:indexResponse xmlns:ns2="http://www.tmp.com/ws/hello">
<return>hello</return>
</ns2:indexResponse>
</S:Body>
</S:Envelope>