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ActiveMQ example source code file (NetworkBridgeFilter.java)
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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