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ActiveMQ example source code file (Location.java)

This example ActiveMQ source code file (Location.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, countdownlatch, countdownlatch, io, ioexception, location, location, mark_type, not_set, not_set, not_set_type, not_set_type, string, threading, threads, user_type

The ActiveMQ Location.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.activemq.kaha.impl.async;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.concurrent.CountDownLatch;

/**
 * Used as a location in the data store.
 * 
 * 
 */
public final class Location implements Comparable<Location> {

    public static final byte MARK_TYPE = -1;
    public static final byte USER_TYPE = 1;
    public static final byte NOT_SET_TYPE = 0;
    public static final int NOT_SET = -1;

    private int dataFileId = NOT_SET;
    private int offset = NOT_SET;
    private int size = NOT_SET;
    private byte type = NOT_SET_TYPE;
    private CountDownLatch latch;

    public Location() {
    }

    Location(Location item) {
        this.dataFileId = item.dataFileId;
        this.offset = item.offset;
        this.size = item.size;
        this.type = item.type;
    }

    boolean isValid() {
        return dataFileId != NOT_SET;
    }

    /**
     * @return the size of the data record including the header.
     */
    public int getSize() {
        return size;
    }

    /**
     * @param size the size of the data record including the header.
     */
    public void setSize(int size) {
        this.size = size;
    }

    /**
     * @return the size of the payload of the record.
     */
    public int getPaylodSize() {
        return size - AsyncDataManager.ITEM_HEAD_FOOT_SPACE;
    }

    public int getOffset() {
        return offset;
    }

    public void setOffset(int offset) {
        this.offset = offset;
    }

    public int getDataFileId() {
        return dataFileId;
    }

    public void setDataFileId(int file) {
        this.dataFileId = file;
    }

    public byte getType() {
        return type;
    }

    public void setType(byte type) {
        this.type = type;
    }

    public String toString() {
        String result = "offset = " + offset + ", file = " + dataFileId + ", size = " + size + ", type = "
                        + type;
        return result;
    }

    public void writeExternal(DataOutput dos) throws IOException {
        dos.writeInt(dataFileId);
        dos.writeInt(offset);
        dos.writeInt(size);
        dos.writeByte(type);
    }

    public void readExternal(DataInput dis) throws IOException {
        dataFileId = dis.readInt();
        offset = dis.readInt();
        size = dis.readInt();
        type = dis.readByte();
    }

    public CountDownLatch getLatch() {
        return latch;
    }

    public void setLatch(CountDownLatch latch) {
        this.latch = latch;
    }

    public int compareTo(Location o) {
        Location l = (Location)o;
        if (dataFileId == l.dataFileId) {
            int rc = offset - l.offset;
            return rc;
        }
        return dataFileId - l.dataFileId;
    }

    public boolean equals(Object o) {
        boolean result = false;
        if (o instanceof Location) {
            result = compareTo((Location)o) == 0;
        }
        return result;
    }

    public int hashCode() {
        return dataFileId ^ offset;
    }

}

Other ActiveMQ examples (source code examples)

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

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