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ActiveMQ example source code file (NetworkBridgeFilter.java)

This example ActiveMQ source code file (NetworkBridgeFilter.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

brokerid, brokerid, consumerinfo, data_structure_type, data_structure_type, datastructure, io, ioexception, jmsexception, logger, message, message, networkbridgefilter, networkbridgefilter, object, util

The ActiveMQ NetworkBridgeFilter.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.command;

import java.io.IOException;
import java.util.Arrays;

import javax.jms.JMSException;

import org.apache.activemq.filter.BooleanExpression;
import org.apache.activemq.filter.MessageEvaluationContext;
import org.apache.activemq.util.JMSExceptionSupport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @openwire:marshaller code="91"
 * 
 */
public class NetworkBridgeFilter implements DataStructure, BooleanExpression {

    public static final byte DATA_STRUCTURE_TYPE = CommandTypes.NETWORK_BRIDGE_FILTER;
    static final Logger LOG = LoggerFactory.getLogger(NetworkBridgeFilter.class);

    private BrokerId networkBrokerId;
    private int networkTTL;

    public NetworkBridgeFilter() {
    }

    public NetworkBridgeFilter(BrokerId remoteBrokerPath, int networkTTL) {
        this.networkBrokerId = remoteBrokerPath;
        this.networkTTL = networkTTL;
    }

    public byte getDataStructureType() {
        return DATA_STRUCTURE_TYPE;
    }

    public boolean isMarshallAware() {
        return false;
    }

    public boolean matches(MessageEvaluationContext mec) throws JMSException {
        try {
            // for Queues - the message can be acknowledged and dropped whilst
            // still
            // in the dispatch loop
            // so need to get the reference to it
            Message message = mec.getMessage();
            return message != null && matchesForwardingFilter(message);
        } catch (IOException e) {
            throw JMSExceptionSupport.create(e);
        }
    }

    public Object evaluate(MessageEvaluationContext message) throws JMSException {
        return matches(message) ? Boolean.TRUE : Boolean.FALSE;
    }

    protected boolean matchesForwardingFilter(Message message) {

        if (contains(message.getBrokerPath(), networkBrokerId)) {
            if (LOG.isTraceEnabled()) {
                LOG.trace("Message all ready routed once through this broker ("
                        + networkBrokerId + "), path: "
                        + Arrays.toString(message.getBrokerPath()) + " - ignoring: " + message);
            }
            return false;
        }

        int hops = message.getBrokerPath() == null ? 0 : message.getBrokerPath().length;

        if (hops >= networkTTL) {
            if (LOG.isTraceEnabled()) {
                LOG.trace("Message restricted to " + networkTTL + " network hops ignoring: " + message);
            }
            return false;
        }

        // Don't propagate advisory messages about network subscriptions
        if (message.isAdvisory() && message.getDataStructure() != null && message.getDataStructure().getDataStructureType() == CommandTypes.CONSUMER_INFO) {
            ConsumerInfo info = (ConsumerInfo)message.getDataStructure();
            hops = info.getBrokerPath() == null ? 0 : info.getBrokerPath().length;
            if (hops >= networkTTL) {
                if (LOG.isTraceEnabled()) {
                    LOG.trace("ConsumerInfo advisory restricted to " + networkTTL + " network hops ignoring: " + message);
                }
                return false;
            }
        }
        return true;
    }

    public static boolean contains(BrokerId[] brokerPath, BrokerId brokerId) {
        if (brokerPath != null && brokerId != null) {
            for (int i = 0; i < brokerPath.length; i++) {
                if (brokerId.equals(brokerPath[i])) {
                    return true;
                }
            }
        }
        return false;
    }

    /**
     * @openwire:property version=1
     */
    public int getNetworkTTL() {
        return networkTTL;
    }

    public void setNetworkTTL(int networkTTL) {
        this.networkTTL = networkTTL;
    }

    /**
     * @openwire:property version=1 cache=true
     */
    public BrokerId getNetworkBrokerId() {
        return networkBrokerId;
    }

    public void setNetworkBrokerId(BrokerId remoteBrokerPath) {
        this.networkBrokerId = remoteBrokerPath;
    }

}

Other ActiveMQ examples (source code examples)

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

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