<!--
    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.
-->
<beans
  xmlns="http://www.springframework.org/schema/beans"
  xmlns:amq="http://activemq.apache.org/schema/core"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
  http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd">

    <!-- Allows us to use system properties as variables in this configuration file -->
    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <value>file:${activemq.home}/conf/credentials.properties</value>
        </property>      
    </bean>

    <broker xmlns="http://activemq.apache.org/schema/core" persistent="false" dedicatedTaskRunner="false" schedulerSupport="false">
 
        <!--
			For better performances use VM cursor and small memory limit.
			For more information, see:
            
            http://activemq.apache.org/message-cursors.html
            
            Also, if your producer is "hanging", it's probably due to producer flow control.
            For more information, see:
            http://activemq.apache.org/producer-flow-control.html
        -->
        <!-- 
          Broker optimizations for better performance:
          1) optimizedDispatch="true" - use a single thread per JMS Session. This setting instructs
             AMQ to use a transport thread to deliver messages to JMS Listener. By default two threads
             are used: Transport thread and a Session thread. This optimization yields the best 
             performance gain.
             
          2) producerFlowControl="false" - instructs the AMQ to never slow down or block a producer      
        -->      
        <destinationPolicy>
            <policyMap>
              <policyEntries>
			  <!-- 
                     produceFlowControl="false" - don't block a fast producer.   

                     optimizedDispatch="true" - reduces number of broker threads. By default, the broker uses a dedicated 
                                                thread (for each Queue) to page messages from a message store into the 
                                                Queue to be dispatched to Message Consumers. When set to "true", the broker
                                                uses a thread pool to service all Queues.
			   -->
                <policyEntry topic=">" producerFlowControl="false" optimizedDispatch="true">
                  <pendingSubscriberPolicy>
                    <vmCursor />
                  </pendingSubscriberPolicy>
                </policyEntry>
                <!-- 
                     produceFlowControl="false" - don't block a fast producer.   

                     optimizedDispatch="true" - reduces number of broker threads. By default, the broker uses a dedicated 
                                                thread (for each Queue) to page messages from a message store into the 
                                                Queue to be dispatched to Message Consumers. When set to "true", the broker
                                                uses a thread pool to service all Queues.

                     maxPageSize="2000" - size of the dispatch buffer (default=200). The broker applies jms selectors
                                          to messages in this buffer only. If a consumer blocks, the producer may fill
                                          up the queue exceeding the size of the dispatch buffer. In such case, a GetMeta
                                          request will not be delivered to the consumer since it will not be in the dispatch
                                          buffer. This can cause GetMeta timeout in the application.                                          
                 -->
                <policyEntry queue=">" producerFlowControl="false" optimizedDispatch="true" maxPageSize="1000">
                  <pendingQueuePolicy>
                    <vmQueueCursor/>
                  </pendingQueuePolicy>
                </policyEntry>
              </policyEntries>
            </policyMap>
        </destinationPolicy> 
 
        
        <!-- 
            The managementContext is used to configure how ActiveMQ is exposed in 
            JMX. By default, ActiveMQ uses the MBean server that is started by 
            the JVM. For more information, see: 
            
            http://activemq.apache.org/jmx.html 
        -->
        <managementContext>
            <managementContext createConnector="true" connectorPort="1099"/>
        </managementContext>

        <!-- 
            Configure message persistence for the broker. The default persistence
            mechanism is the KahaDB store (identified by the kahaDB tag). 
            For more information, see: 
            
            http://activemq.apache.org/persistence.html 
        <persistenceAdapter>
            <kahaDB directory="${activemq.base}/data/kahadb"/>
        </persistenceAdapter>
        -->
        
        
          <!--
            The systemUsage controls the maximum amount of space the broker will 
            use before slowing down producers. For more information, see:
            
            http://activemq.apache.org/producer-flow-control.html
    -->         
        <systemUsage>
            <systemUsage>
                <memoryUsage>
                    <memoryUsage limit="500 mb"/>
                </memoryUsage>
                <storeUsage>
                    <storeUsage limit="1 gb"/>
                </storeUsage>
                <tempUsage>
                    <tempUsage limit="500 mb"/>
                </tempUsage>
            </systemUsage>
        </systemUsage>
	
		  
        <!-- 
            The transport connectors expose ActiveMQ over a given protocol to
            clients and other brokers. For more information, see: 
            
            http://activemq.apache.org/configuring-transports.html 
        -->
        <transportConnectors>
            <transportConnector name="openwire" uri="tcp://0.0.0.0:61616"/>
        </transportConnectors>

    </broker>

    <!-- 
        Enable web consoles, REST and Ajax APIs and demos
        It also includes Camel (with its web console), see ${ACTIVEMQ_HOME}/conf/camel.xml for more info
        
        Take a look at ${ACTIVEMQ_HOME}/conf/jetty.xml for more details 
    <import resource="jetty.xml"/>
    -->
</beans>