RESTful API, deploying and starting a process

jmiller — Tue, 07 Aug 2012 19:09:49 GMT

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 instanc

Re: RESTful API, deploying and starting a process

gumba — Wed, 08 Aug 2012 10:25:00 GMT

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?

Re: RESTful API, deploying and starting a process

jmiller — Fri, 10 Aug 2012 15:43:38 GMT

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

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RESTful API, deploying and starting a process

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