java - Apache Karaf, can't inject entity manager -

i want use entity manager container, when try access

java.lang.illegalstateexception: need active coordination

persistence.xml

<persistence-unit name="data-point" transaction-type="jta"> <jta-data-source>osgi:service/javax.sql.datasource/(osgi.jndi.service.name=dvdrental)</jta-data-source> <properties>   <property name="hibernate.dialect" value="org.hibernate.dialect.postgresql82dialect"/>   <property name="hibernate.show_sql" value="true"/>   <property name="hibernate.hbm2ddl.auto" value="update"/>   <property name="hibernate.connection.driver_class" value="org.postgresql.driver"/>   <property name="hibernate.archive.autodetection" value="class"/> </properties> 

bluprint.xml

<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"        xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"        xsi:schemalocation="http://www.osgi.org/xmlns/blueprint/v1.0.0 https://osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd"        default-activation="eager"        xmlns:tx="http://aries.apache.org/xmlns/transactions/v1.2.0"        xmlns:jpa="http://aries.apache.org/xmlns/jpa/v2.0.0">  <jpa:enable /> <tx:enable-annotations /> <service id="filesentitymanager" ref="filesentitymanagerimpl" interface="ru.bia.karaf.dao.filesentitymanager"/> <bean id="filesentitymanagerimpl" class="ru.bia.karaf.dao.filesentitymanagerimpl"/> <bean id="testbean" class="ru.bia.karaf.web.testbean" init-method="test">     <property name="filesentitymanager" ref="filesentitymanagerimpl"/> </bean> 

testbean.java

public class testbean {     private filesentitymanagerimpl filesentitymanager;      public void test(){     system.out.println("hey bro init");     system.out.println("filesentitymanager = " + filesentitymanager);     system.out.println("filesentitymanager.getem() = " + filesentitymanager.getem()); }  public filesentitymanagerimpl getfilesentitymanager() {     return filesentitymanager; }  public void setfilesentitymanager(filesentitymanagerimpl filesentitymanager) {     this.filesentitymanager = filesentitymanager;     } } 

filesentitymanagerimpl.java

@osgiserviceprovider(classes = {filesentitymanager.class}) @transactional public class filesentitymanagerimpl implements filesentitymanager {     @persistencecontext(unitname="data-point")     entitymanager em; ... } 

the entitymanager injected filesentitymanagerimpl thread local proxy of entitymanager. lifecycle bound coordination.

if access em outside of coordination error. can make sure coordination active using @transactional annotations. if not need actual transaction coordination use @transactional(txtype.supports).

you should not access entitymanager outside of object injected it.