1. modify activemq.xsd in activemq-core.jar, insert mongodb node after kahaDB node:
 <xs:element name='mongodb'>
	<xs:annotation>
		<xs:documentation><![CDATA[
    An implementation of {@link PersistenceAdapter} designed for use with mongodb.
  ]]></xs:documentation>
	</xs:annotation>
	<xs:complexType>
		<xs:sequence>
			<xs:element name='brokerService' minOccurs='0' maxOccurs='1'>
				<xs:complexType>
					<xs:choice minOccurs='0' maxOccurs='1'>
						<xs:element ref='tns:broker' />
						<xs:element ref='tns:brokerService' />
						<xs:any namespace='##other' />
					</xs:choice>
				</xs:complexType>
			</xs:element>
			<xs:element name='usageManager' minOccurs='0' maxOccurs='1'>
				<xs:complexType>
					<xs:choice minOccurs='0' maxOccurs='1'>
						<xs:element ref='tns:systemUsage' />
						<xs:any namespace='##other' />
					</xs:choice>
				</xs:complexType>
			</xs:element>
			<xs:any namespace='##other' minOccurs='0' maxOccurs='unbounded' />
		</xs:sequence>
		<xs:attribute name='archiveDataLogs' type='xs:boolean' />
		<xs:attribute name='brokerName' type='xs:string' />
		<xs:attribute name='brokerService' type='xs:string' />
		<xs:attribute name='checkForCorruptJournalFiles' type='xs:boolean' />
		<xs:attribute name='checkpointInterval' type='xs:long'>
			<xs:annotation>
				<xs:documentation><![CDATA[
        Get the checkpointInterval
      ]]></xs:documentation>
			</xs:annotation>
		</xs:attribute>
		<xs:attribute name='checksumJournalFiles' type='xs:boolean' />
		<xs:attribute name='cleanupInterval' type='xs:long'>
			<xs:annotation>
				<xs:documentation><![CDATA[
        Get the cleanupInterval
      ]]></xs:documentation>
			</xs:annotation>
		</xs:attribute>
		<xs:attribute name='concurrentStoreAndDispatchQueues'
			type='xs:boolean' />
		<xs:attribute name='concurrentStoreAndDispatchTopics'
			type='xs:boolean' />
		<xs:attribute name='databaseLockedWaitDelay' type='xs:integer' />
		<xs:attribute name='host' type='xs:string'>
			<xs:annotation>
				<xs:documentation><![CDATA[
        Get the host
      ]]></xs:documentation>
			</xs:annotation>
		</xs:attribute>
		<xs:attribute name='port' type='xs:integer'>
			<xs:annotation>
				<xs:documentation><![CDATA[
        Get the port
      ]]></xs:documentation>
			</xs:annotation>
		</xs:attribute>
		<xs:attribute name='db' type='xs:string'>
			<xs:annotation>
				<xs:documentation><![CDATA[
        Get the db
      ]]></xs:documentation>
			</xs:annotation>
		</xs:attribute>
	</xs:complexType>
</xs:element>

2. add mongodb in META-INF/services/org/apache/xbean/spring/http/activemq.apache.org/schema/core in activemq-core.jar:
   mongodb = org.qsoft.activemq.store.mongodb.MongodbPersistenceAdapter

3. configure your mongodb server in your activemq.xml:
    <persistenceAdapter>
        <mongodb host="127.0.0.1" port="27017" db="activemq" />
    </persistenceAdapter>
4. package this project to a jar to reference in your project