playframework - Declaring non-default JNDI connection for JPA access in Play for Scala -


the following snippet works in play scala:

class mydao @inject() (jpaapi: jpaapi) {          @transactional   def somemethod = {     jpaapi.withtransaction {   // ....

in application.conf defined db.default.jndiname=defaultds , jpa.default=defaultpersistenceunit.

now, need define jndi connection db.another.jndiname=anotherds jpa.another=anotherpersistenceunit.

where persistence.xml is:

<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"              xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"              xsi:schemalocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd"              version="2.1">      <persistence-unit name="defaultpersistenceunit" transaction-type="resource_local">         <provider>org.hibernate.jpa.hibernatepersistenceprovider</provider>         <non-jta-data-source>defaultds</non-jta-data-source>         <properties>             <property name="hibernate.dialect" value="org.hibernate.dialect.hanacolumnstoredialect"/>         </properties>     </persistence-unit>      <persistence-unit name="anotherpersistenceunit" transaction-type="resource_local">         <provider>org.hibernate.jpa.hibernatepersistenceprovider</provider>         <non-jta-data-source>anotherds</non-jta-data-source>         <properties>             <property name="hibernate.dialect" value="org.hibernate.dialect.hanacolumnstoredialect"/>         </properties>     </persistence-unit>  </persistence>

how inject anotherds in application can used jpaapi?

you can specify multiple jpa configurations in application.conf:

db.default.jndiname=defaultds ... // other configuration db.default jpa.default=defaultpersistenceunit  db.another.jndiname=anotherds ... // other configuration db.another jpa.another=anotherpersistenceunit

in dao, inject jpaapi you're doing. use jpaapi#em(string) entitymanager specific persistence unit name:

class mydao @inject() (jpaapi: jpaapi) {    def somemethodwithdefault = {     val em = jpaapi.em("default") // em entitymanager     jpaapi.withtransaction {       ...     }   }    def somemethodwithanother = {     val em = jpaapi.em("another") // em entitymanager     jpaapi.withtransaction {       ...     }   }

also, @transactional annotation unnecessary if you're using jpaapi#withtransaction.


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