How to post json to Liferay OSGI restful service

To post a json to a Liferay OSGI restful service,
the service method itself must be able to accept String as the input parameter.
the service method is then parse the json string to a json object
follow by the required function process
and lastly return the response to the service consumer

@POST
@Path("/addPerson")
@Consumes(MediaType.APPLICATION_JSON) 
@Produces(MediaType.APPLICATION_JSON)
public Response addPerson(final String personJsonString) {

    ObjectMapper mapper = new ObjectMapper();
    JsonNode personJson = mapper.readTree(personJsonString);

    /**
     * Process person json 
     * 
     */
    
    return Response.status(Response.Status.OK).build();
}

Done!!

How to setup Eclipse for Play framework

1. open <play-project-home>\project\plugins.sbt (c:\play-java\project\plugins.sbt)
    add the following line.

addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "4.0.0")

2. Open <play-project-home>\build.sbt
    add the following lines

EclipseKeys.preTasks := Seq(compile in Compile)

EclipseKeys.projectFlavor := EclipseProjectFlavor.Java

EclipseKeys.createSrc := EclipseCreateSrc.ValueSet(EclipseCreateSrc.ManagedClasses, EclipseCreateSrc.ManagedResources) 

3. restart the play sbt console, so that sbt performs update for the new plugins.

4. in sbt console, type "eclipse"

5. import the new project into eclipse workspace
    File > Import > Existing Projects into Workspace > Next > Select root directory > browse <play-project-home>, Finish.

source: https://www.playframework.com/documentation/2.5.x/IDE



Done!!

How to import Database connections into Oracle SQL Developer from XML

1. R-click on Connection root, a small context menu appears

2.Click on "Import Connections"

How to export Database connections from Oracle SQL Developer to XML

This article shows how to export the configured database connections in Oracle SQL Developer so that it is easily share the connections with other team members. 

1. R-click on Connections root, a small context menu appears.

2. click on "Export Connections".

Eclipselink Cache Coordination with JBoss and JMS

Agenda:
  1. Creating JPA project and generating entities.
  2. Configuring persistence properties and JPA project
  3. Testing the JPA project
  4. Update database when entity changed.
  5. Setting up load balance database connection.
  6. Setting Cache Coordination in Eclipselink

Cache Coordination enables EclipseLink to synchronize data changes in a distributed environment. for more information about cache coordination in EclipseLink, click here.

Following are the steps to enable Cache Coordination in JBoss AS7 / JBoss EAP6.
1. create JMS topic

2. creaet JMS connection factory

3. add the cache coordination properties into persistence.xml

<property name="eclipselink.cache.coordination.protocol" value="jms" />

<property name="eclipselink.cache.coordination.jms.topic" value="jms/EclipseLinkTopic" />

<property name="eclipselink.cache.coordination.jms.factory" value="jms/EclipseLinkTopicConnectionFactory" />

<property name="eclipselink.cache.coordination.jms.reuse-topic-publisher" value="true" />

<property name="eclipselink.cache.coordination.jms.host" value="remote://HOST:PORT" />

4. in eclipseLink module.xml, add the following into <dependencies />

<module name="javax.jms.api"/>

5. in hornetq module.xml, add the following into <dependencies />
<module name="org.eclipse.persistence"/>


Done!!