问题
I am using Mule JPA module for retrieving and insert/updating data. I can able retrieve data but not able to update the DB. Its giving no errors and as per the log it seems that the record got updated. But :( If I check DB no recorded is getting inserted. I believe that the transaction is not getting committed.
Please help me how to achieve this issue.
Here is my mflow
<?xml version="1.0" encoding="UTF-8"?>
<mule xmlns:tracking="http://www.mulesoft.org/schema/mule/ee/tracking" xmlns:json="http://www.mulesoft.org/schema/mule/json" xmlns:http="http://www.mulesoft.org/schema/mule/http" xmlns="http://www.mulesoft.org/schema/mule/core" xmlns:doc="http://www.mulesoft.org/schema/mule/documentation"
xmlns:spring="http://www.springframework.org/schema/beans" version="EE-3.4.1"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:jpa="http://www.mulesoft.org/schema/mule/jpa"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-current.xsd
http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd
http://www.mulesoft.org/schema/mule/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd
http://www.mulesoft.org/schema/mule/jpa http://www.mulesoft.org/schema/mule/jpa/current/mule-jpa.xsd
http://www.mulesoft.org/schema/mule/json http://www.mulesoft.org/schema/mule/json/current/mule-json.xsd
http://www.mulesoft.org/schema/mule/ee/tracking http://www.mulesoft.org/schema/mule/ee/tracking/current/mule-tracking-ee.xsd">
<spring:beans>
<spring:import resource="classpath:applicationContext.xml" />
</spring:beans>
<jpa:config name="Java_Persistence_API" entityManagerFactory-ref="entityManagerFactory" doc:name="Java Persistence API"/>
<flow name="jpa-exampleFlow1" doc:name="jpa-exampleFlow1">
<http:inbound-endpoint exchange-pattern="request-response" host="localhost" port="8081" doc:name="HTTP"/>
<logger message="payload ---->>>> #[payload]" level="INFO" doc:name="Logger"/>
<logger message="#[message.inboundProperties.get("http.relative.path")]" level="INFO" doc:name="Logger"/>
<choice doc:name="Choice">
<when expression="#[message.inboundProperties.get("http.relative.path")=="getContact"]">
<logger message="in GetContact" level="INFO" doc:name="Logger"/>
<component class="com.test.test.GetContact" doc:name="Java"/>
<jpa:query statement="from ContactEO contact where contact.firstName = :firstName" queryParameters-ref="#[payload:]"></jpa:query>
<!-- <jpa:query statement="from ContactEO contact where contact.id = :id" queryParameters-ref="#[payload:]"/> -->
</when>
<when expression="#[message.inboundProperties.get("http.relative.path")=="addContact"]">
<logger message="In AddContact" level="INFO" doc:name="Logger"/>
<component class="com.test.test.AddContact" doc:name="Java"/>
<transactional action="ALWAYS_BEGIN" doc:name="Transactional">
<jpa:persist entity-ref="#[payload:]" config-ref="Java_Persistence_API" />
</transactional>
</when>
</choice>
<json:object-to-json-transformer doc:name="Object to JSON"/>
<logger message="payload ---->>>> #[payload]" level="INFO" doc:name="Logger"/>
</flow>
</mule>
Here is my persistence.xml
<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_1_0.xsd"
version="1.0">
<persistence-unit name="default" transaction-type="RESOURCE_LOCAL">
</persistence-unit>
</persistence>
Here is my console log
2014-05-25 23:41:38,533 INFO [org.mule.api.processor.LoggerMessageProcessor] - <payload ---->>>> /addContact>
2014-05-25 23:41:38,568 INFO [org.mule.api.processor.LoggerMessageProcessor] - <addContact>
2014-05-25 23:41:38,586 INFO [org.mule.api.processor.LoggerMessageProcessor] - <In AddContact>
Hibernate: insert into contact (EMAIL, FIRSTNAME, LASTNAME) values (?, ?, ?)
2014-05-25 23:41:38,811 INFO [org.mule.api.processor.LoggerMessageProcessor] - <payload ---->>>> {"firstName":"king","lastName":"verma","email":"vermaS@xxx.com","id":9}>
回答1:
Here your console shows :- Hibernate: insert into contact (EMAIL, FIRSTNAME, LASTNAME) values (?, ?, ?) and your payload is :- {"firstName":"king","lastName":"verma","email":"vermaS@xxx.com","id":9} ... where this id:"9" will be accommodated ? your query has 3 fields firstname,lastname and email ..where as your payload contains firstname,lastname,email and id
回答2:
Finally could able to commit transaction using MULE JPA transport, by creating CustomTransactionFactory which starts the transaction.
public class CustomTransactionFactory implements TransactionFactory{
@Override
public Transaction beginTransaction(MuleContext muleContext)
throws TransactionException {
EntityManagerFactory emf = muleContext.getRegistry().lookupObject("entityManagerFactory");
TransactionFactory tf = new JPATransactionFactory();
Transaction tx = tf.beginTransaction(muleContext);
tx.bindResource(emf, emf.createEntityManager());
tx.begin();
return tx;
}
@Override
public boolean isTransacted() {
return true;
}
}
By referring custom transaction manager in In-bound endpoint as below, we can achieve flow level transactions.
<flow name="jpa_exampleFlow1" doc:name="jpa_exampleFlow1">
<http:inbound-endpoint exchange-pattern="request-response" doc:name="HTTP" address="http://localhost:9090/jpa_example">
<custom-transaction action="ALWAYS_BEGIN" factory-ref="transctionManager"/>
Note: Transactional blocks are no more required.
来源：https://stackoverflow.com/questions/23858446/mule-jpa-persist-is-not-inserting-or-updating