WSContext.java

package com.jiuqi.lbsinterface.ws.publish;

import java.lang.reflect.Proxy;

import com.jiuqi.lbsinterface.bean.UserBean;
import com.jiuqi.lbsinterface.exception.LoginException;
import com.jiuqi.lbsinterface.manager.IPositionManager;
import com.jiuqi.lbsinterface.ws.client.ClientInvocationHandler;

/**
 * 远程端与服务端交互的上下文,负责连接、数据传输等操作
 * 
 * @author anjoulee
 */
public class WSContext {
	/**
	 * [MMC]webservice的服务相对地址
	 */
	public final static String WS_URI_NJT = "/lbs";

	private String serverURL = null;
	private String serviceURI = null;
	private String sessionID = null;
	private UserBean user;

	/**
	 * 获得MMC当前交互上下文的实例
	 * 
	 * @param serverURL
	 *            服务端的地址
	 * @return
	 */
	public static WSContext getClientContext(String serverURL, String sessionId)
			throws LoginException {
		WSContext context = new WSContext(serverURL, WS_URI_NJT);
		if (null != sessionId) {
			context.sessionID = sessionId;
			context.user = context.getManager(IPositionManager.class).getUser(
					sessionId);
		}
		return context;
	}

	/**
	 * 获得MMC当前交互上下文的实例
	 * 
	 * @param serverURL
	 *            服务端的地址
	 * @return
	 */
	public static WSContext getClientContext(String serverURL)
			throws LoginException {
		WSContext context = new WSContext(serverURL, WS_URI_NJT);
		context.sessionID = context.getManager(IPositionManager.class).login(
				"anonymous", "anonymous");
		return getClientContext(serverURL, context.sessionID);
	}

	/**
	 * 根据对应的接口名获取响应的服务（返回的object为传入接口）</br>
	 * 
	 * android端实现时异常处理问题，所有返回异常可能会被UndeclaredThrowableException包装。</br>
	 * 请这样使用</br> } catch (Throwable e) {</br> if(e instanceof
	 * UndeclaredThrowableException){</br> e.getCause();</br> }</br>
	 * e.printStackTrace();</br> }</br> </br>
	 * 
	 * @param intf
	 *            服务代理接口
	 * @return 返回的object为传入接口
	 */
	@SuppressWarnings("unchecked")
	public <T> T getManager(Class<T> intf) {
		return (T) Proxy.newProxyInstance(getClass().getClassLoader(),
				new Class<?>[] { intf }, new ClientInvocationHandler(serverURL,
						serviceURI, sessionID, intf));
	}

	private WSContext(String serverURL, String serviceURI) {
		this.serverURL = serverURL;
		this.serviceURI = serviceURI;
	}

	public UserBean getUser() {
		return user;
	}

	public String getSessionID() {
		return sessionID;
	}
}