Tomcat example source code file (TestNioSender.java)

This example Tomcat source code file (TestNioSender.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Tomcat tags/keywords

channeldata, channeldata, exception, exception, io, iterator, memberimpl, niosender, niosender, selectionkey, selector, string, testniosender, testniosender, throwable, util

The Tomcat TestNioSender.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.catalina.tribes.test;

import java.io.IOException;
import java.nio.channels.SelectionKey;
import java.util.Iterator;
import java.nio.channels.Selector;
import org.apache.catalina.tribes.transport.nio.NioSender;
import org.apache.catalina.tribes.membership.MemberImpl;
import org.apache.catalina.tribes.io.ChannelData;
import org.apache.catalina.tribes.io.XByteBuffer;
import org.apache.catalina.tribes.Member;
import org.apache.catalina.tribes.Channel;

/**
 * <p>Title: 

 *
 * <p>Description: 

 *
 * <p>Company: 

 *
 * @author not attributable
 * @version 1.0
 */
public class TestNioSender {
    private Selector selector = null;
    private int counter = 0;
    MemberImpl mbr;
    private static int testOptions = Channel.SEND_OPTIONS_DEFAULT;
    public TestNioSender()  {
        
    }
    
    public synchronized int inc() {
        return ++counter;
    }
    
    public synchronized ChannelData getMessage(Member mbr) {
        String msg = new String("Thread-"+Thread.currentThread().getName()+" Message:"+inc());
        ChannelData data = new ChannelData(true);
        data.setMessage(new XByteBuffer(msg.getBytes(),false));
        data.setAddress(mbr);
        
        return data;
    }

    public void init() throws Exception {
        selector = Selector.open();
        mbr = new MemberImpl("localhost",4444,0);
        NioSender sender = new NioSender();
        sender.setDestination(mbr);
        sender.setDirectBuffer(true);
        sender.setSelector(selector);
        sender.setMessage(XByteBuffer.createDataPackage(getMessage(mbr)));
        sender.connect();
    }

    public void run() {
        while (true) {

            int selectedKeys = 0;
            try {
                selectedKeys = selector.select(100);
                //               if ( selectedKeys == 0 ) {
                //                   System.out.println("No registered interests. Sleeping for a second.");
                //                   Thread.sleep(100);
            } catch (Exception e) {
                e.printStackTrace();
                continue;
            }

            if (selectedKeys == 0) {
                continue;
            }

            Iterator it = selector.selectedKeys().iterator();
            while (it.hasNext()) {
                SelectionKey sk = (SelectionKey) it.next();
                it.remove();
                try {
                    int readyOps = sk.readyOps();
                    sk.interestOps(sk.interestOps() & ~readyOps);
                    NioSender sender = (NioSender) sk.attachment();
                    if ( sender.process(sk, (testOptions&Channel.SEND_OPTIONS_USE_ACK)==Channel.SEND_OPTIONS_USE_ACK) ) {
                        System.out.println("Message completed for handler:"+sender);
                        Thread.currentThread().sleep(2000);
                        sender.reset();
                        sender.setMessage(XByteBuffer.createDataPackage(getMessage(mbr)));
                    }
                    

                } catch (Throwable t) {
                    t.printStackTrace();
                    return;
                }
            }
        }
    }

    public static void main(String[] args) throws Exception {
        TestNioSender sender = new TestNioSender();
        sender.init();
        sender.run();
    }
}