问题
I'm trying to write a Mule ESB application that reads an XML file into a domain object and then writes that object to a MySQL database using JPA.
I have figured out most of the needed config but I am running into a problem where the Mule JPA module (https://github.com/mulesoft/mule-module-jpa) doesn't seem to be committing the sql queries. I have set the Mule JPA component to flush the queries and I can see them being written to the MySQL general log but a COMMIT is never done, so the data isn't ever stored. It seems that the doCommit() method on the JPATransaction class in the module isn't ever called, I can't see any log output for it. However, the transaction does seem to be bound using the bindResource method of the same class. This can be seen in the logs.
Any idea what I'm doing wrong here?
The mule flow:
<spring:beans>
<spring:bean class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" id="dataSource">
<spring:property name="driverClassName" value="com.mysql.jdbc.Driver" />
<spring:property name="url" value="jdbc:mysql://localhost:3306/interoperability_layer?user=root&password=***" />
<spring:property name="defaultAutoCommit" value="true" />
</spring:bean>
<spring:bean class="org.springframework.orm.jpa.JpaTransactionManager" id="transactionManager">
<spring:property name="entityManagerFactory" ref="entityManagerFactory"/>
</spring:bean>
<spring:bean id="jpaDialect" class="org.springframework.orm.jpa.vendor.EclipseLinkJpaDialect" />
<spring:bean id="eclipseLinkVendor" class="org.springframework.orm.jpa.vendor.EclipseLinkJpaVendorAdapter">
<spring:property name="databasePlatform" value="org.eclipse.persistence.platform.database.MySQLPlatform"/>
<spring:property name="generateDdl" value="false"/>
<spring:property name="showSql" value="false"/>
</spring:bean>
<spring:bean id="entityManagerFactory" name="Bean" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<spring:property name="dataSource" ref="dataSource" />
<spring:property name="persistenceUnitName" value="org.jembi.openhim.jpa" />
<spring:property name="jpaDialect" ref="jpaDialect" />
<spring:property name="jpaVendorAdapter" ref="eclipseLinkVendor" />
<spring:property name="packagesToScan" value="domain"/>
</spring:bean>
</spring:beans>
<jpa:config name="Java_Persistence_API" entityManagerFactory-ref="entityManagerFactory" doc:name="Java Persistence API"/>
<flow name="openhim-report-adapterFlow1" doc:name="openhim-report-adapterFlow1">
<vm:inbound-endpoint exchange-pattern="request-response" path="processReport" doc:name="VM">
</vm:inbound-endpoint>
<component class="org.jembi.openhim.IndicatorReportXmlToObjectTransformer" doc:name="Store indicator reports"/>
<logger message="Converted XML to Report object" level="INFO" doc:name="Logger"/>
<transactional action="ALWAYS_BEGIN" doc:name="Transactional">
<jpa:persist config-ref="Java_Persistence_API" entity-ref="#[payload:]" doc:name="Java Persistence API" flush="true"/>
</transactional>
<logger message="Saved Report object using JPA" level="INFO" doc:name="Logger"/>
<scripting:component doc:name="Groovy">
<scripting:script engine="Groovy"><![CDATA[message.payload = "";]]></scripting:script>
</scripting:component>
<http:response-builder status="201" doc:name="HTTP Response Builder" contentType="application/xml"/>
<logger message="Sending HTTP responce" level="INFO" doc:name="Logger"/>
</flow>
The log output:
INFO 2013-09-02 16:17:21,601 [[openhim-report-adapter].connector.http.mule.default.receiver.02] org.mule.api.processor.LoggerMessageProcessor: Converted XML to Report object
DEBUG 2013-09-02 16:17:21,633 [[openhim-report-adapter].connector.http.mule.default.receiver.02] org.mule.module.jpa.adapters.JPAModuleProcessAdapter: Persisting: org.jembi.openhim.Report@1749c7ac
DEBUG 2013-09-02 16:17:21,634 [[openhim-report-adapter].connector.http.mule.default.receiver.02] org.mule.module.jpa.adapters.JPAModuleProcessAdapter: Executing JPA command with message: org.jembi.openhim.Report@1749c7ac, command: org.mule.module.jpa.command.Persist@6bf22341 and parameters: null
[EL Info]: 2013-09-02 16:17:21.663--ServerSession(1208128432)--EclipseLink, version: Eclipse Persistence Services - 2.5.0.v20130507-3faac2b
[EL Info]: connection: 2013-09-02 16:17:21.964--ServerSession(1208128432)--file:/home/ryan/MuleStudio/workspace/.mule/apps/openhim-report-adapter/classes_org.jembi.openhim.jpa login successful
DEBUG 2013-09-02 16:17:22,030 [[openhim-report-adapter].connector.http.mule.default.receiver.02] org.mule.module.jpa.JPATransaction: Binding JPA transaction: 621071ed-13da-11e3-a4cd-0907619c09d6
DEBUG 2013-09-02 16:17:22,043 [[openhim-report-adapter].connector.http.mule.default.receiver.02] org.mule.module.jpa.JPATransaction: Binding org.eclipse.persistence.internal.jpa.EntityManagerImpl@2eabef26 to org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean@19e1bfba
DEBUG 2013-09-02 16:17:22,044 [[openhim-report-adapter].connector.http.mule.default.receiver.02] org.mule.module.jpa.command.Persist: Persisting entity: org.jembi.openhim.Report@1749c7ac
INFO 2013-09-02 16:17:22,134 [[openhim-report-adapter].connector.http.mule.default.receiver.02] org.mule.api.processor.LoggerMessageProcessor: Saved Report object using JPA
INFO 2013-09-02 16:17:22,286 [[openhim-report-adapter].connector.http.mule.default.receiver.02] org.mule.api.processor.LoggerMessageProcessor: Sending HTTP responce
DEBUG 2013-09-02 16:17:22,289 [[openhim-report-adapter].connector.http.mule.default.receiver.02] com.mulesoft.mule.config.pool.MonitoredThreadPoolExecutor: Stats{totalTime=979.67, startTime=25637681310485, endTime=25638660979198}
DEBUG 2013-09-02 16:17:22,289 [[openhim-report-adapter].connector.http.mule.default.receiver.02] com.mulesoft.mule.config.pool.MonitoredThreadPoolExecutor: Finished Work: org.mule.execution.FlowProcessingPhase$1@7a670f8b. in Thread[[openhim-report-adapter].connector.http.mule.default.receiver.02,5,main]. Active tasks: 1 (2 threads in a pool)
DEBUG 2013-09-02 16:17:22,290 [[openhim-report-adapter].http.request.dispatch.8085.01] com.mulesoft.mule.config.pool.MonitoredThreadPoolExecutor: Stats{totalTime=1007.19, startTime=25637654077832, endTime=25638661269425}
DEBUG 2013-09-02 16:17:22,290 [[openhim-report-adapter].http.request.dispatch.8085.01] com.mulesoft.mule.config.pool.MonitoredThreadPoolExecutor: Finished org.mule.transport.http.HttpRequestDispatcherWork@b6edc37. in Thread[[openhim-report-adapter].http.request.dispatch.8085.01,5,main]. Active tasks: 0 (1 threads in a pool)
UPDATE
And here is my persistence.xml file:
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
version="2.0">
<persistence-unit name="org.jembi.openhim.jpa" transaction-type="RESOURCE_LOCAL">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<class>org.jembi.openhim.Report</class>
<class>org.jembi.openhim.Indicator</class>
<class>org.jembi.openhim.DataElements</class>
<properties>
<property name="eclipselink.weaving" value="false"/>
</properties>
</persistence-unit>
</persistence>
回答1:
Others have reported a similar issue with mule-module-jpa, the module is not maintained. Also, is it a requirement to use eclipselink? Have a look at a working Mule-JPA example, this uses Hibernate instead. A description of the example may be found here.
HTH
来源：https://stackoverflow.com/questions/18575724/configuring-the-mule-jpa-module-to-use-eclipse-link-and-mysql