ActiveMQ example source code file (ConnectionAudit.java)

This example ActiveMQ source code file (ConnectionAudit.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

activemqdestination, activemqdestination, activemqmessageaudit, activemqmessageaudit, connectionaudit, linkedhashmap, linkedhashmap, lrucache, lrucache, message, util

The ActiveMQ ConnectionAudit.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;

import java.util.LinkedHashMap;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.Message;
import org.apache.activemq.util.LRUCache;

/**
 * An auditor class for a Connection that looks for duplicates
 */
class ConnectionAudit {

    private boolean checkForDuplicates;
    private LinkedHashMap<ActiveMQDestination, ActiveMQMessageAudit> destinations = new LRUCache(1000);
    private LinkedHashMap<ActiveMQDispatcher, ActiveMQMessageAudit> dispatchers = new LRUCache(1000);

    
	private int auditDepth = ActiveMQMessageAudit.DEFAULT_WINDOW_SIZE;
	private int auditMaximumProducerNumber = ActiveMQMessageAudit.MAXIMUM_PRODUCER_COUNT;
	
	
    synchronized void removeDispatcher(ActiveMQDispatcher dispatcher) {
        dispatchers.remove(dispatcher);
    }

    synchronized boolean isDuplicate(ActiveMQDispatcher dispatcher, Message message) {
        if (checkForDuplicates && message != null) {
            ActiveMQDestination destination = message.getDestination();
            if (destination != null) {
                if (destination.isQueue()) {
                    ActiveMQMessageAudit audit = destinations.get(destination);
                    if (audit == null) {
                        audit = new ActiveMQMessageAudit(auditDepth, auditMaximumProducerNumber);
                        destinations.put(destination, audit);
                    }
                    boolean result = audit.isDuplicate(message);
                    return result;
                }
                ActiveMQMessageAudit audit = dispatchers.get(dispatcher);
                if (audit == null) {
                    audit = new ActiveMQMessageAudit(auditDepth, auditMaximumProducerNumber);
                    dispatchers.put(dispatcher, audit);
                }
                boolean result = audit.isDuplicate(message);
                return result;
            }
        }
        return false;
    }

    protected synchronized void rollbackDuplicate(ActiveMQDispatcher dispatcher, Message message) {
        if (checkForDuplicates && message != null) {
            ActiveMQDestination destination = message.getDestination();
            if (destination != null) {
                if (destination.isQueue()) {
                    ActiveMQMessageAudit audit = destinations.get(destination);
                    if (audit != null) {
                        audit.rollback(message);
                    }
                } else {
                    ActiveMQMessageAudit audit = dispatchers.get(dispatcher);
                    if (audit != null) {
                        audit.rollback(message);
                    }
                }
            }
        }
    }

    /**
     * @return the checkForDuplicates
     */
    boolean isCheckForDuplicates() {
        return this.checkForDuplicates;
    }

    /**
     * @param checkForDuplicates the checkForDuplicates to set
     */
    void setCheckForDuplicates(boolean checkForDuplicates) {
        this.checkForDuplicates = checkForDuplicates;
    }

	public int getAuditDepth() {
		return auditDepth;
	}

	public void setAuditDepth(int auditDepth) {
		this.auditDepth = auditDepth;
	}

	public int getAuditMaximumProducerNumber() {
		return auditMaximumProducerNumber;
	}

	public void setAuditMaximumProducerNumber(int auditMaximumProducerNumber) {
		this.auditMaximumProducerNumber = auditMaximumProducerNumber;
	}
    
}