Hyland Connect

jmiller · ‎08-07-2012

Hello. We are using the RESTful interface with Activiti 5.9. We changed org.activiti.rest.api.repository.DeploymentUploadResource to return a DeploymentResponse (thus JSON) instead of an HTML string.

We are attempting the simplest case to deploy a process definition and then start a process instance from that definition. The documentation and code indicate we can start a process instance by process definition ID or key. When we deploy a process definition we get back the deployment ID not the process definition ID, and it looks like it's hard to get the process definition ID and key. What's the easiest way to get the process definition ID and/or key so that we can start the process?

Thank you very much for your thoughts.

Joe Miller

gumba · ‎08-08-2012

import org.apache.commons.io.IOUtils;
import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.AuthCache;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.protocol.ClientContext;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.auth.BasicScheme;
import org.apache.http.impl.client.BasicAuthCache;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.BasicHttpContext;

public class RestAPI {

/**
* @param args
*/
public static void main(String[] args) {
try {
 // TODO Auto-generated method stub
 DefaultHttpClient client = new DefaultHttpClient();
 client.getCredentialsProvider().setCredentials(new AuthScope("localhost", 8080),
 new UsernamePasswordCredentials("kermit", "kermit"));

 // Create AuthCache instance
 AuthCache authCache = new BasicAuthCache();
 // Generate BASIC scheme object and add it to the local auth cache
 BasicScheme basicAuth = new BasicScheme();
 authCache.put(new HttpHost("localhost", 8080, "http"), basicAuth);

 // Add AuthCache to the execution context
 BasicHttpContext localcontext = new BasicHttpContext();
 localcontext.setAttribute(ClientContext.AUTH_CACHE, authCache);
 HttpPost postMethod = new HttpPost("http://localhost:8080/activiti-rest/service/process-instance");

 postMethod.setEntity(new StringEntity("{\"processDefinitionKey\":\"MailSender\"}", "UTF-8"));
 HttpResponse response = client.execute(postMethod, localcontext);
 System.out.println(IOUtils.toString(response.getEntity().getContent()));
 client.getConnectionManager().shutdown();
 } catch (Exception e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }



}

}

This code returns the following error:
<html>
<head>
 <title>Status page</title>
</head>
<body style="font-family: sans-serif;">
Internal Server Error
Failed to retrieve the process definition parameters
You can get technical details <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.5.1">here</a>. 
Please continue your visit at our <a href="/">home page</a>.

</body>
</html>

what is wrong with it?

jmiller · ‎08-10-2012

Just to respond to my original post…

I worked around this by implementing my own service that creates a deployment then returns a ProcessDefinitionResponse containing the process definition ID.
Here are the last few lines of code:


    Deployment deployment = deploymentBuilder.deploy();

    ProcessDefinition processDefinition = ActivitiUtil.getRepositoryService().
        createProcessDefinitionQuery().
        deploymentId(deployment.getId()).
        singleResult();

    return new ProcessDefinitionResponse((ProcessDefinitionEntity) processDefinition);

Joe

Hyland Connect

RESTful API, deploying and starting a process