signal to a remote engine

[nsi]

Hi everybody!

I'm new, both in this forum and in activiti. So I'm sorry for asking what I suppose is a simple question, but I couldn't find any helpful answer anywhere.

I need to send a signal to a receive task running on a remote activiti engine. How can I do it?

My idea is the following: we run a activiti engine in a standard installation on tomcat with a very simple process, which is waiting for a signal when a manual task ist finished. The manual task ist done in a java swing application, which should send the signal on pressing a button. I am now looking for a code example that shows, what should happen after pressing the button

What ist the best way to do this? Can anybody help, please?

Thanks in advance
Norbert

[trademak]

You can use the Activiti REST API for that (http://activiti.org/userguide/index.html#N12DA3).
Note that we'll release a fully update REST API in the Activiti 5.13 release in a few days.

Best regards,

[nsi]

Thanx for the quick answer.

I didn't quite understand: /signal is already part of the 5.9 api?

My rest call is: http://localhost:8080/activiti-rest/process-instance/1539/signal
Is it correct? It doesn't seem to work (" 405 Method Not Allowed")

Thanks once more
Norbert

[nsi]

-

[frederikherema1]

What method are you using? You should use a HTTP POST. As of 5.13 (will be released this week), there are new methods available in the REST-api related to signaling.

[fpuech]

Hi !

I have kind of this problem I think.
I am working on activiti 5.12.1 and i would like to stay on this version if it is possible for my think.

I would like to signal a receivetask to a remote engine. I already tried to send a HTTP POST request. 
Here is my code.

         HashMap<String, String> var = new HashMap<String, String>();
  var.put("activityId ", "receivetask1");
  boolean isSignalOk = activitiClient.signalReceiveTask("102461", var);
                System.out.println(isSignalOk);

After that, the request is correctly sent but i have "false" as response. I do not understand why I never get "true".

Can you help me please. Ask me if you want more precisions.

Florent

[frederikherema1]

What is in the activitiClient.signalReceiveTask method? This is not something that is part of the Activiti code-base, so we cannot know what the method actually returns and why.

[fpuech]

I made a class ActivitiClient in which I have tyhe following method :

public Boolean signalReceiveTask(String processInstanceId, HashMap<String, String> var) throws IOException {
  String varStr = objectMapper.writeValueAsString(var);
  JsonNode jsonCompleteOk = HttpUtil.executePostJson(url + "process-instance/"+processInstanceId+"/signal", varStr, user, password);
  return jsonCompleteOk.get("success").asBoolean();
}

HTTPUtil.executePostJson is simply the call to the method post. I tested it with request such as /login and it works fine. "user" and "password" are "kermit" in my case.

[frederikherema1]

I see you're using the legacy REST-api. If you're on 5.13, consider using the new API, which uses status-codes for indicating errors and has better error-messaging (using response JSON-body).

Do you see any exceptions in your log? perhaps you're using the wrong process-instance id?

[fpuech]

Thanks for you help. I finally found my error.

var.put("activityId ", "receivetask1");

In the precedent instruction, i put a space after activityId so it did not know what it was I think.
After the errasing of this space, it works fine.