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Tomcat example source code file (

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

Java - Tomcat tags/keywords

interruptedexception, interruptedexception, object, object, queue, queue, util, vector, vector

The Tomcat 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
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.apache.catalina.util;

import java.util.Vector;

 * A simple FIFO queue class which causes the calling thread to wait
 * if the queue is empty and notifies threads that are waiting when it
 * is not empty.
 * @author Anil V (
public class Queue {
    private Vector vector = new Vector();

     * Put the object into the queue.
     * @param   object          the object to be appended to the
     *                          queue.
    public synchronized void put(Object object) {

     * Pull the first object out of the queue. Wait if the queue is
     * empty.
    public synchronized Object pull() {
        while (isEmpty())
            try {
            } catch (InterruptedException ex) {
        return get();

     * Get the first object out of the queue. Return null if the queue
     * is empty.
    public synchronized Object get() {
        Object object = peek();
        if (object != null)
        return object;

     * Peek to see if something is available.
    public Object peek() {
        if (isEmpty())
            return null;
        return vector.elementAt(0);

     * Is the queue empty?
    public boolean isEmpty() {
        return vector.isEmpty();

     * How many elements are there in this queue?
    public int size() {
        return vector.size();

Other Tomcat examples (source code examples)

Here is a short list of links related to this Tomcat source code file:

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