I would like to list down some of the issues I faced and their workarounds while trying to invoke a BPEL process from JAVA program using RMI
Some of you would be aware that sample RMI code is available in the samples provided by SOA Suite.I am explaining the steps you need to follow to make the program working.
Create a java project and add the 2 jars required for compilation namely orabpel.jar and xmlparserv2.jar
The code should first set the properties required for RMI invocation
Properties props = new java.util.Properties();
Map map = new HashMap();
Then use the Locator class to connect to domain with password and properties
Locator locator = new Locator("default","welcome1",props);
IDeliveryService deliveryService = (IDeliveryService)locator.lookupService(IDeliveryService.SERVICE_NAME );
DeliveryService is used for invocation of the process. Will explain the methods during the invocation.
Create the input xml message to be given to the BPEL process
String xml = "<ns1:BPELProcess2ProcessRequest xmlns:ns1=\"http://xmlns.oracle.com/BPELProcess2\">\n" +
" <ns1:input>geo</ns1:input>\n" +
You can get the xml snippet by running the process once in you BPEL console and copy the request tags .Now create a NormalizedMessage object which will be passed with the invocation.
NormalizedMessage nm = new NormalizedMessage( );
nm.addPart("payload", xml );
As you would be knowing there are 2 types of invocations.
One-way invocation and two-way invocation
So for one-way invocation use Post method of the DeliveryService
String processid = "OneWayHello";
String operation = "initiate";
deliveryService.post(processid, operation, nm);
For two-way invocation use request method of the DeliveryService
String processid = "TwoWayHello";
String operation = "process";
NormalizedMessage res = deliveryService.request(processid, operation, nm);
To view the response message use XMLHelper
Map payload = res.getPayload();
Element partEl = (Element) payload.get("payload");
System.out.println( "HelloWorld is " + XMLHelper.toXML(partEl) );
Oc4j.jar,oc4jclient.jar,,rmic.jar and commons-logging.api.
If the oc4jinstance is wrongly mentioned like you have specified home instead of oc4j_soa then you will be getting following exception
java.lang.Exception: Failed to create "ejb/collaxa/system/DeliveryBean" bean; exception reported is: "javax.naming.NameNotFoundException: ejb/collaxa/system/DeliveryBean not found
Your code should be up and running and be able to interact with BPEL process.