home | career | drupal | java | mac | mysql | perl | scala | uml | unix  

ActiveMQ example source code file (HashEntry.java)

This example ActiveMQ source code file (HashEntry.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 - ActiveMQ tags/keywords

comparable, comparable, datainput, dataoutput, hashentry, hashentry, io, ioexception, ioexception, not_set, not_set, string

The ActiveMQ HashEntry.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,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.apache.activemq.kaha.impl.index.hash;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import org.apache.activemq.kaha.Marshaller;

 * Key and index for DiskBased Hash Index
class HashEntry implements Comparable {

    static final int NOT_SET = -1;
    private Comparable key;
    private long indexOffset;

    public int compareTo(Object o) {
        if (o instanceof HashEntry) {
            HashEntry other = (HashEntry)o;
            return key.compareTo(other.key);
        } else {
            return key.compareTo(o);

    public boolean equals(Object o) {
        return compareTo(o) == 0;

    public int hashCode() {
        return key.hashCode();

    public String toString() {
        return "HashEntry(" + key + "," + indexOffset + ")";

    HashEntry copy() {
        HashEntry copy = new HashEntry();
        copy.key = this.key;
        copy.indexOffset = this.indexOffset;
        return copy;

     * @return the key
    Comparable getKey() {
        return this.key;

     * @param key the key to set
    void setKey(Comparable key) {
        this.key = key;

     * @return the indexOffset
    long getIndexOffset() {
        return this.indexOffset;

     * @param indexOffset the indexOffset to set
    void setIndexOffset(long indexOffset) {
        this.indexOffset = indexOffset;

    void write(Marshaller keyMarshaller, DataOutput dataOut) throws IOException {
        keyMarshaller.writePayload(key, dataOut);

    void read(Marshaller keyMarshaller, DataInput dataIn) throws IOException {
        indexOffset = dataIn.readLong();
        key = (Comparable)keyMarshaller.readPayload(dataIn);

Other ActiveMQ examples (source code examples)

Here is a short list of links related to this ActiveMQ HashEntry.java source code file:

new blog posts


Copyright 1998-2016 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.