六、 跨多个WebService管理Session

当多个WebService的时候，我们要管理它的Session。这个时候我们得依靠ServiceGroupContext保存session信息；然后在发布WebService的时候，services.xml文件的的service表情的scope就不再说request或是transportsession了，而是application；最后同样要开启对session的管理，即options.setManageSession(true);

1、 首先多个WebService的session管理的代码如下：

package com.hoo.service;

import org.apache.axis2.context.MessageContext;
import org.apache.axis2.context.ServiceGroupContext;

/**
 * <b>function:</b>管理多个会话Session信息
 * @author hoojo
 * @createDate 2011-3-9 下午05:11:07
 * @file LoginSessionService.java
 * @package com.hoo.service
 * @project Axis2WebService
 * @blog http://blog.csdn.net/IBM_hoojo
 * @email hoojo_@126.com
 * @version 1.0
 */
public class LoginSessionService {
	public boolean login(String userName, String password) {
		MessageContext context = MessageContext.getCurrentMessageContext();
		ServiceGroupContext ctx = context.getServiceGroupContext();
		if ("admin".equals(userName) && "123456".equals(password)) {
			ctx.setProperty("userName", userName);
			ctx.setProperty("password", password);
			ctx.setProperty("msg", "登陆成功");
			return true;
		}
		ctx.setProperty("msg", "登陆失败");
		return false;
	}
	
	public String getLoginMessage() {
		MessageContext context = MessageContext.getCurrentMessageContext();
		ServiceGroupContext ctx = context.getServiceGroupContext();
		return ctx.getProperty("userName") + "#" + ctx.getProperty("msg");
	}
}

和上面的Session一样的操作，只不过是用ServiceGroupContext上下文来存取session信息

另外还需要用一个Service来查询session的信息，SearchService的代码如下：

package com.hoo.service;

import org.apache.axis2.context.MessageContext;
import org.apache.axis2.context.ServiceGroupContext;

/**
 * <b>function:</b>查找多服务Session会话中的消息
 * @author hoojo
 * @createDate 2011-3-9 下午05:22:39
 * @file SearchSessionServcie.java
 * @package com.hoo.service
 * @project Axis2WebService
 * @blog http://blog.csdn.net/IBM_hoojo
 * @email hoojo_@126.com
 * @version 1.0
 */
public class SearchSessionServcie {
	public String findSessionMessage(String key) {
        MessageContext mc = MessageContext.getCurrentMessageContext();
        ServiceGroupContext ctx =  mc.getServiceGroupContext();                
        if (ctx.getProperty(key) != null) {
            return "找到的数据<" + key + ", " + ctx.getProperty(key) + ">";
        } else {
            return "没有找到<" + key + ">的数据";
        }
	}
}

2、 编写services.xml来发布这2个服务，还以前不一样的。这一次是用一个services.xml文件配置2个service，同时发布2个服务。Xml代码如下：

<serviceGroup>
	<service name="LoginSessionService" scope="application">
		<description>
			Web Service Session例子
		</description>
		<parameter name="ServiceClass">
			com.hoo.service.LoginSessionService  
		</parameter>
		<messageReceivers>
			<messageReceiver mep="http://www.w3.org/2004/08/wsdl/in-out"
				class="org.apache.axis2.rpc.receivers.RPCMessageReceiver" />
			<messageReceiver mep="http://www.w3.org/2004/08/wsdl/in-only"
				class="org.apache.axis2.rpc.receivers.RPCInOnlyMessageReceiver" />
		</messageReceivers>
	</service>

	<service name="SearchSessionService" scope="application">
		<description>
			Web Service Search Session例子
		</description>
		<parameter name="ServiceClass">
			com.hoo.service.SearchSessionServcie  
		</parameter>
		<messageReceivers>
			<messageReceiver mep="http://www.w3.org/2004/08/wsdl/in-out"
				class="org.apache.axis2.rpc.receivers.RPCMessageReceiver" />
			<messageReceiver mep="http://www.w3.org/2004/08/wsdl/in-only"
				class="org.apache.axis2.rpc.receivers.RPCInOnlyMessageReceiver" />
		</messageReceivers>
	</service>
</serviceGroup>

3、 发布完成后，可以通过http://localhost:8080/axis2/services/listServices查看发布的WebService服务，编写客户端的测试代码，code如下：

package com.hoo.service;

import javax.xml.namespace.QName;
import org.apache.axis2.AxisFault;
import org.apache.axis2.addressing.EndpointReference;
import org.apache.axis2.client.Options;
import org.apache.axis2.rpc.client.RPCServiceClient;

/**
 * <b>function:</b>多会话Session管理，WebService客户端请求代码
 * @author hoojo
 * @createDate 2011-3-9 下午05:17:15
 * @file LoginSessionServiceClient.java
 * @package com.hoo.service
 * @project Axis2WebService
 * @blog http://blog.csdn.net/IBM_hoojo
 * @email hoojo_@126.com
 * @version 1.0
 */
public class LoginSessionServiceClient {

	public static void main(String[] args) throws AxisFault {
		String target = "http://localhost:8080/axis2/services/LoginSessionService";
		RPCServiceClient client = new RPCServiceClient();
		Options options = client.getOptions();
		options.setManageSession(true);
		
		EndpointReference epr = new EndpointReference(target);
		options.setTo(epr);
		
		QName qname = new QName("http://service.hoo.com", "login");
		//指定调用的方法和传递参数数据，及设置返回值的类型
		Object[] result = client.invokeBlocking(qname, new Object[] { "admin", "123456" }, new Class[] { boolean.class });
		System.out.println(result[0]);
		
		qname = new QName("http://service.hoo.com", "getLoginMessage");
		result = client.invokeBlocking(qname, new Object[] { null }, new Class[] { String.class });
		System.out.println(result[0]);
		
		target = "http://localhost:8080/axis2/services/SearchSessionService";
		epr = new EndpointReference(target);
		options.setTo(epr);
		
		qname = new QName("http://service.hoo.com", "findSessionMessage");
		result = client.invokeBlocking(qname, new Object[] { "userName" }, new Class[] { String.class });
		System.out.println(result[0]);
		qname = new QName("http://service.hoo.com", "findSessionMessage");
		result = client.invokeBlocking(qname, new Object[] { "msg" }, new Class[] { String.class });
		System.out.println(result[0]);
		
		qname = new QName("http://service.hoo.com", "findSessionMessage");
		result = client.invokeBlocking(qname, new Object[] { "password" }, new Class[] { String.class });
		System.out.println(result[0]);
	}
}

运行后结果如下：

true

admin#登陆成功

找到的数据<userName, admin>

找到的数据<msg, 登陆成功>

找到的数据<password, 123456>

4、 如果将services.xml文件<service name="SearchSessionService" scope="application">的内容改成scope=transportsession，看看什么情况。是不是找不到session中的内容。