fingerslave.java

aglet的部分源码

package examples.patterns;

/*
 * @(#)FingerSlave.java
 * 
 * 03L7246 (c) Copyright IBM Corp. 1996, 1998
 * 
 * The program is provided "as is" without any warranty express or
 * implied, including the warranty of non-infringement and the implied
 * warranties of merchantibility and fitness for a particular purpose.
 * IBM will not be liable for any damages suffered by you as a result
 * of using the Program. In no event will IBM be liable for any
 * special, indirect or consequential damages or lost profits even if
 * IBM has been advised of the possibility of their occurrence. IBM
 * will not be liable for any third party claims against you.
 */

import com.ibm.aglet.*;
import com.ibm.agletx.patterns.*;

import java.util.Date;
import java.util.Vector;
import java.util.Enumeration;

/**
 * FingerSlave is a aglet of Slave pattern that moves to a remote
 * site and backs to the original site with information.
 * 
 * @see Slave
 * @version     1.00    96/12/28
 * @author      Danny B. Lange
 * @author      Yariv Aridor
 * 
 */

public class FingerSlave extends Slave {

	protected void doJob() throws AgletException {
		RESULT = getLocalInfo();
	}
	private Object getLocalInfo() throws AgletException {
		AgletContext ac = getAgletContext();
		String hostname;

		if (ac.getHostingURL() == null) {
			hostname = "Unknown";
		} else {
			hostname = ac.getHostingURL().getHost().toString();
		} 

		FingerInfo info = new FingerInfo(hostname, 

		// PropertyPermission for the following properties
		// should be specified in aglets.policy file.
		getProperty("user.name"), getProperty("user.home"), 
								  getProperty("user.dir"), 
								  getProperty("os.arch"), 
								  getProperty("os.name"), 
								  getProperty("os.version"), 
								  getProperty("java.version"), (new Date()));

		return info;
	}
	private String getProperty(String key) {
		return System.getProperty(key, "Unknown");
	}
	protected void initializeJob() {
		RESULT = null;
	}
}