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ActiveMQ example source code file (DurableSubscriptionView.java)

This example ActiveMQ source code file (DurableSubscriptionView.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

connectioncontext, durablesubscriptionview, durablesubscriptionview, durablesubscriptionviewmbean, durabletopicsubscription, opendataexception, opendataexception, override, removesubscriptioninfo, removesubscriptioninfo, string, string, subscription, subscriptionview

The ActiveMQ DurableSubscriptionView.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.broker.jmx;

import javax.management.openmbean.CompositeData;
import javax.management.openmbean.OpenDataException;
import javax.management.openmbean.TabularData;

import org.apache.activemq.broker.ConnectionContext;
import org.apache.activemq.broker.region.DurableTopicSubscription;
import org.apache.activemq.broker.region.Subscription;
import org.apache.activemq.command.RemoveSubscriptionInfo;

/**
 * 
 */
public class DurableSubscriptionView extends SubscriptionView implements DurableSubscriptionViewMBean {

    protected ManagedRegionBroker broker;
    protected String subscriptionName;
    protected DurableTopicSubscription durableSub;

    /**
     * Constructor
     * 
     * @param clientId
     * @param sub
     */
    public DurableSubscriptionView(ManagedRegionBroker broker, String clientId, Subscription sub) {
        super(clientId, sub);
        this.broker = broker;
        this.durableSub=(DurableTopicSubscription) sub;
        if (sub != null) {
            this.subscriptionName = sub.getConsumerInfo().getSubscriptionName();
        }
    }

    /**
     * @return name of the durable consumer
     */
    public String getSubscriptionName() {
        return subscriptionName;
    }

    /**
     * Browse messages for this durable subscriber
     * 
     * @return messages
     * @throws OpenDataException
     */
    public CompositeData[] browse() throws OpenDataException {
        return broker.browse(this);
    }

    /**
     * Browse messages for this durable subscriber
     * 
     * @return messages
     * @throws OpenDataException
     */
    public TabularData browseAsTable() throws OpenDataException {
        return broker.browseAsTable(this);
    }

    /**
     * Destroys the durable subscription so that messages will no longer be
     * stored for this subscription
     */
    public void destroy() throws Exception {
        RemoveSubscriptionInfo info = new RemoveSubscriptionInfo();
        info.setClientId(clientId);
        info.setSubscriptionName(subscriptionName);
        ConnectionContext context = new ConnectionContext();
        context.setBroker(broker);
        context.setClientId(clientId);
        broker.removeSubscription(context, info);
    }

    public String toString() {
        return "ActiveDurableSubscriptionView: " + getClientId() + ":" + getSubscriptionName();
    }

    
    public int cursorSize() {
        if (durableSub != null && durableSub.getPending() != null) {
            return durableSub.getPending().size();
        }
        return 0;
    }

   
    public boolean doesCursorHaveMessagesBuffered() {
        if (durableSub != null && durableSub.getPending() != null) {
            return durableSub.getPending().hasMessagesBufferedToDeliver();
        }
        return false;
    }

   
    public boolean doesCursorHaveSpace() {
        if (durableSub != null && durableSub.getPending() != null) {
            return durableSub.getPending().hasSpace();
        }
        return false;
    }

    /* (non-Javadoc)
     * @see org.apache.activemq.broker.jmx.DurableSubscriptionViewMBean#getCursorMemoryUsage()
     */
    public long getCursorMemoryUsage() {
        if (durableSub != null && durableSub.getPending() != null && durableSub.getPending().getSystemUsage()!=null) {
            return durableSub.getPending().getSystemUsage().getMemoryUsage().getUsage();
        }
        return 0;
    }

    
    public int getCursorPercentUsage() {
        if (durableSub != null && durableSub.getPending() != null && durableSub.getPending().getSystemUsage()!=null) {
            return durableSub.getPending().getSystemUsage().getMemoryUsage().getPercentUsage();
        }
        return 0;
    }

    public boolean isCursorFull() {
        if (durableSub != null && durableSub.getPending() != null) {
            return durableSub.getPending().isFull();
        }
        return false;
    }

    @Override
    public boolean isActive() {
        return durableSub.isActive();
    }
    
    
}

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