joingroup.java

jxta新建点组的示例程序

import java.io.StringWriter;
import net.jxta.credential.AuthenticationCredential;
import net.jxta.credential.Credential;
import net.jxta.document.StructuredDocument;
import net.jxta.document.StructuredTextDocument;
import net.jxta.document.MimeMediaType;
import net.jxta.membership.Authenticator;
import net.jxta.membership.MembershipService;
import net.jxta.peergroup.PeerGroup;
import net.jxta.protocol.PeerGroupAdvertisement;
import net.jxta.protocol.ModuleImplAdvertisement;
import net.jxta.discovery.DiscoveryService;


public class JoinGroup {
	
	/**
	 * 加入到新建的点组grp
	 * @param grp
	 */
	public void joinGroup(PeerGroup grp){
		StructuredDocument creds = null;
		try{
			//生成点组的信任书
			AuthenticationCredential authCred = new AuthenticationCredential(grp,//要加入的点组
																			null,//请求调用的方法
																			creds);//可选信息
			MembershipService membership =grp.getMembershipService();            //获取要加入的成员关系服务
			Authenticator auth = membership.apply(authCred);                     //申请加入
			
			if(auth.isReadyForJoin()){                                     	     //如果申请得到批准

				Credential myCred= membership.join(auth);          			     //加入点组
				System.out.println("成功加入到新建的点组");
				StructuredTextDocument doc = (StructuredTextDocument)myCred.getDocument(new MimeMediaType("text/plain"));
				StringWriter out = new StringWriter();
				doc.sendToWriter(out);                                           //输出信任书
				out.close();
			} 
			else
				System.out.println("加入到点组失败");
		}
		catch(Exception e){
			System.out.println("Failure in authentication");
			e.printStackTrace();
		}
	}
}