JBPM6 REST API Http Status 500

[leonvdm2]

I would like to use the JBPM6 REST API to get details of current processes. More specifically I am trying to get a list of all the tasks for each process that belongs to a user so that I can display the status of each task.

I am using the url: http://localhost:8080//jbpm-console/rest/runtime/deploymentId/history/instance

I get this exception:

org.jboss.resteasy.spi.LoggableFailure: Unable to find contextual data of type: javax.ws.rs.core.HttpHeaders

        org.jboss.resteasy.core.ContextParameterInjector$GenericDelegatingProxy.invoke(ContextParameterInjector.java:53)

        com.sun.proxy.$Proxy183.getRequestHeaders(Unknown Source)

        org.kie.services.remote.rest.ResourceBase.getVariant(ResourceBase.java:118)

        org.kie.services.remote.rest.exception.DescriptiveExceptionHandler.toResponse(DescriptiveExceptionHandler.java:66)

        org.kie.services.remote.rest.exception.DescriptiveExceptionHandler.toResponse(DescriptiveExceptionHandler.java:25)

        sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

        sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

        java.lang.reflect.Method.invoke(Method.java:606)

        org.jboss.weld.bean.proxy.AbstractBeanInstance.invoke(AbstractBeanInstance.java:44)

        org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:105)

        org.kie.services.remote.rest.exception.DescriptiveExceptionHandler$Proxy$_$$_WeldClientProxy.toResponse(DescriptiveExceptionHandler$Proxy$_$$_WeldClientProxy.java)

        org.jboss.resteasy.core.SynchronousDispatcher.executeExceptionMapper(SynchronousDispatcher.java:324)

        org.jboss.resteasy.core.SynchronousDispatcher.handleException(SynchronousDispatcher.java:229)

        org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:123)

        org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208)

        org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55)

        org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50)

        javax.servlet.http.HttpServlet.service(HttpServlet.java:847)

        org.jboss.weld.servlet.ConversationPropagationFilter.doFilter(ConversationPropagationFilter.java:62)

        org.jboss.solder.servlet.exception.CatchExceptionFilter.doFilter(CatchExceptionFilter.java:65)

        org.jboss.solder.servlet.event.ServletEventBridgeFilter.doFilter(ServletEventBridgeFilter.java:74)

        org.jbpm.designer.web.filter.impl.PluggableFilter.doFilter(PluggableFilter.java:70)

        org.uberfire.security.server.UberFireSecurityFilter.doFilter(UberFireSecurityFilter.java:266

Currently testing it with SoapUI5.

[marco.rietveld]

Hi Leon,

Which version/build are you using?

This rings a vague bell, but I'm pretty sure that I fixed it.

[leonvdm2]

Hi Marco

Appreciate your response.

We are using 6.0.1FINAL.

Best regards

Leon

[marco.rietveld]

This seems to be the same problem as what's described here:

https://issues.jboss.org/browse/RESTEASY-396

Which appliation server are you running this on? (AS 7.1.1? EAP 6.1.1?)

[leonvdm2]

Hey Marco

AS 7.1.1.

It's the current demo install.

I just want to create a http client(org.apache) that can access the REST service for JBPM6.

Below is the code that ii am using.

Do I need to set another property in the header of my post perhaps?

public void getNodesForProcess() {

  HttpClient httpClient = new DefaultHttpClient();

  UsernamePasswordCredentials credentials = new UsernamePasswordCredentials(userId, password);

  BasicScheme scheme = new BasicScheme();

  String deploymentId = "net.mtnbs.hosting.provisioning:Provisioning:1.0";

  URL deploymentUrl = null;

  try {

       deploymentUrl = new URL("http://localhost:8080/jbpm-console");

  } catch (MalformedURLException e) {

  // TODO Auto-generated catch block

  e.printStackTrace();

  }

  String getProcessesRestCall = null;

  try {

       getProcessesRestCall = new URL(deploymentUrl, deploymentUrl.getPath() + "/rest/runtime/" + deploymentId + "/history/instance").toExternalForm();

  } catch (MalformedURLException e) {

  // TODO Auto-generated catch block

  e.printStackTrace();

  }

  try {

  HttpPost httpPost = new HttpPost(getProcessesRestCall);

  Header authorizationHeader = scheme.authenticate(credentials, httpPost);

  httpPost.addHeader(authorizationHeader);

  HttpResponse response = httpClient.execute(httpPost);

  if (response != null) {

       logger.info("Task Response status line: " + response.getStatusLine());

  if (response.getStatusLine() != null) {

       logger.info("Task Response status code: " + response.getStatusLine().getStatusCode());

  }

  HttpEntity entity = response.getEntity();

  String output = EntityUtils.toString(entity);

  logger.info(output);

// if (entity != null) {

// createProcessInstancesResponse(output);

// }

  }

  } catch (ClientProtocolException ex) {

  ex.printStackTrace();

  } catch (AuthenticationException ex) {

  ex.printStackTrace();

  } catch (Exception ex) {

  ex.printStackTrace();

  } finally {

  }

  }

[marco.rietveld]

Hi Leon,

Hmm.. I just took a fifth (seventh?) look at the stack trace and realized that the exception is being thrown on authentication. It's an edge case I hadn't thought about..

In short, the exception is being thrown because your authentication is failing, as far as I can tell (although, I guess that was pretty obvious to you. :/ sorry).

With regards to creating an (apache) based client, take a look this code here might help you (the org.kie.services.client.api.command.RemoteConfiguration.createPreemptiveAuthHttpClient(..) method). It's what I use underwater to take care of authentication and is apache based. Could you try to copy/paste/modify that code and see if it works for you?

[leonvdm2]

Thanks very much. On leave at the moment.

Will let you know when I'm back at work.

Thanks again

Sent from my iPhone