Java Rest API for JBPM 7

[yellapusony]

Hello All,

I am trying to execute the workflows of JBPM 7.0.0 Final  using java rest API( through  kie-remote client  ).Below is the piece of code i used :

import org.kie.api.runtime.KieSession;

import org.kie.api.runtime.manager.RuntimeEngine;

import org.kie.api.runtime.manager.RuntimeManager;

import org.kie.api.runtime.process.ProcessInstance;

import org.kie.remote.client.api.RemoteRuntimeEngineFactory;

RuntimeEngine engine =

RemoteRuntimeEngineFactory.newRestBuilder().addUrl(new URL("http://192.168.175.161:8080/jbpm-console")).addUserName("admin").addPassword("admin").addDeploymentId("ScriptTaskProject_1.0.0").addTimeout(0).build();

KieSession ksession = engine.getKieSession();

  ProcessInstance processInstance=ksession.startProcess("ScriptTaskProject.ScriptTaskProcess");

System.out.println("***** Process instance:"+processInstance.getId());

In the above java code,I used kie-remote-client-6.5.0.Final jar. It works fine till JBPM 6.5.0 Final, but giving below nullpointer exception when trying to execute workflow in jbpm7.0.0 final

Below is the stack trace :

org.kie.remote.client.api.exception.RemoteCommunicationException: Unable to retrieve content from response!

  at org.kie.services.client.api.command.AbstractRemoteCommandObject.executeRestCommand(AbstractRemoteCommandObject.java:427)

  at org.kie.services.client.api.command.AbstractRemoteCommandObject.executeCommand(AbstractRemoteCommandObject.java:128)

  at org.kie.services.client.api.command.KieSessionClientCommandObject.getFactCount(KieSessionClientCommandObject.java:241)

  at SampleWorkFlowTrigger.main(SampleWorkFlowTrigger.java:37)

Caused by: java.lang.NullPointerException

  at org.kie.services.client.api.command.AbstractRemoteCommandObject.executeRestCommand(AbstractRemoteCommandObject.java:410)

  ... 3 more

Am i doing anything wrong or is there any new way of using java rest API in JBPM 7.0.0 final ?

Thanks in advance !!.

[ripin]

hi,in the jbpm7, jbpm-console no longer provide task/process.. rest api,it transfer to kie-server: http://localhost:8080/kie-server/docs/

[beena.patil]

Hi Ripin

Incase we are starting the jbpm process from remote application, should we still use the RemoteRuntimeEngineFactory.newRestBuilder() and provide the url http://localhost:8080/kie-server/....  I am getting this error while starting the runtime ...

"HTTP method POST is not supported by this URL:"

RuntimeEngine engine = RemoteRuntimeEngineFactory.newRestBuilder()

.addUrl(new URL("http://localhost:8080/kie-server"))

.addUserName("admin").addPassword("admin")

.addDeploymentId("com.myteam:HelloTest:1.0.0")

.build();

KieSession ksession = engine.getKieSession();

Can you please let me know which method to call for starting the process, as i am facing the same problem stated above

Thanks

Beena

[rafael.pino]

Greetings Beena.

Have you been able to start a process in JBPM 7 successfully?. Please, can you share your solution?.

Thanks.

[williamantonio]

Hi,

The BC API is deprecated! Use the KIE Server APIs instead. See this to get started:

https://docs.jboss.org/drools/release/6.4.0.CR2/drools-docs/html/ch22.html#d0e23626jBPM Documentation

[beena.patil]

Hi Rafael

I used the following to start the process

    // jBPM Process and Project constants

    private final String DEPLOYMENT_ID = "com.los:remoteAPITest:1.0";

    private final String USERNAME = "krisv";

    private final String PASSWORD = "krisv";

    private final String CONTAINER_ID = "remoteAPITest_1.0";

    private final String PROCESS_ID = "remoteAPITest.remoteAPIprocess";

    private final String SERVER_URL = "http://localhost:8080/kie-server/services/rest/server";

        KieServicesConfiguration config =  KieServicesFactory.newRestConfiguration(

            SERVER_URL, USERNAME, PASSWORD);

        KieServicesClient client = KieServicesFactory.newKieServicesClient(config);

        ProcessServicesClient processServices = client.getServicesClient(ProcessServicesClient.class);

        UserTaskServicesClient taskServices = client.getServicesClient(UserTaskServicesClient.class);

        // start a new process instance

        Map<String, Object> params = new HashMap<String, Object>();

        Long processInstanceId = processServices.startProcess(CONTAINER_ID,PROCESS_ID);//container_id,process_id

        //Long processInstanceId = processServices.startProcess("evaluation_1.0.0-SNAPSHOT", "evaluation", params);

        System.out.println("Start Evaluation process " + processInstanceId);

Imports in pom.xml

<dependency>

            <groupId>org.kie</groupId>

            <artifactId>kie-api</artifactId>

            <version>7.0.0.Final</version>

        </dependency>

        <dependency>

            <groupId>org.kie.server</groupId>

            <artifactId>kie-server-client</artifactId>

            <version>7.3.0.Final</version>

        </dependency>

[godse.hrushikesh]

Thank you very much u saved my life