logoutaction.java

一个基于eclipse插件开发的聊天程序

package talkClient;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IWorkbenchWindow;

public class LogOutAction extends Action {

	private final IWorkbenchWindow window;

	LogOutAction(String text, IWorkbenchWindow window) {
		super(text);
		this.window = window;
		// The id is used to refer to the action in a menu or toolbar
		setId(ICommandIds.CMD_LOG_OUT);
		// Associate the action with a pre-defined command, to allow key
		// bindings.
		setActionDefinitionId(ICommandIds.CMD_LOG_OUT);
		setImageDescriptor(talkClient.TalkClientPlugin
				.getImageDescriptor("/icons/sample.gif"));
	}

	public void run() {
		// LOG OUT

		// GET IP
		InetAddress ip = null;
		try {
			// [NAME]/[ADDRESS]
			ip = InetAddress.getLocalHost();
		} catch (UnknownHostException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		String ip_str = ip.toString().split("/")[1];

		// REMOTE LOG OUT
		switch (logOut(ip_str)) {
		case 0:
			MessageDialog.openInformation(
					Display.getCurrent().getActiveShell(), "Information",
					"Log out success.");
			break;
		case 1:
			MessageDialog
					.openError(Display.getCurrent().getActiveShell(), "Error",
							"You have not registered.\nPlease contact with administrator.");
			break;
		case 2:
			MessageDialog.openInformation(
					Display.getCurrent().getActiveShell(), "Information",
					"Already log out.");
			break;
		}
	}

	private int logOut(String ip_str) {
		// MAKE THE REQUEST PACKAGE
		// [1]::[IP]
		String logOut_req = "1::" + ip_str;

		// SOCKET CONNECTION
		Socket req_socket = null;
		try {
			req_socket = new Socket("172.18.80.34", 1860);
		} catch (UnknownHostException e) {
			MessageDialog.openError(Display.getCurrent().getActiveShell(),
					"Error", "Connection failed!");
		} catch (IOException e) {
			MessageDialog.openError(Display.getCurrent().getActiveShell(),
					"Error", "Connection failed!");
		}
		PrintWriter pw = null;
		try {
			pw = new PrintWriter(req_socket.getOutputStream(), true);
		} catch (IOException e2) {
			e2.printStackTrace();
		}
		// SENT THE PACKAGE
		pw.println(logOut_req);

		// RECEIVE THE RESPONSE FROM
		// 0 -- SUCCESS
		// 1 -- IP NOT EXIST, SO NEED REGISTER
		// 2 -- ALREADY LOG OUT
		String logOut_response = "";
		BufferedReader br_in = null;
		try {
			br_in = new BufferedReader(new InputStreamReader(req_socket
					.getInputStream()));
			logOut_response = br_in.readLine();
			
			br_in.close();
			pw.close();
			req_socket.close();
			
		} catch (IOException e3) {
			// TODO Auto-generated catch block
			e3.printStackTrace();
		}

		System.out.println(logOut_response);

		return Integer.parseInt(logOut_response);
	}

}