Process Definition Deployment via API

Camunda 7 Topics Discussion & Questions
1

Hello,

I’m trying to deploy a process definition from a file using the following code

DeploymentBuilder deploymentBuilder = repositoryService.createDeployment().name(definitionName);
deploymentBuilder.addInputStream(definitionName, definitionFileInputStream);
String deploymentId = deploymentBuilder.deploy().getId();
System.out.println(deploymentId);

The above code runs successfully and the new deploymentId is printed out.

Later, I tried to list the deployed process definitions using the following code

List definitions = repositoryService.createProcessDefinitionQuery().list();
System.out.println(definitions.size());

The above code runs successfully but the output is always 0.

I’ve done some investigations and found that in the ACT_GE_BYTEARRAY table an entry with the corresponding deploymentId exists and the BYTES_ column contains that contents of the definitions file.

I have also found that there is no corresponding entry found in ACT_RE_PROCDEF table.

Is there something messing? from the API and the examples I found it seems that the above code shall suffice, or is there a missing step?

Thanks for your help

admin edit: crosspost of Camunda Process Definition Deployment via API - Stack Overflow

2

Hi,

Make sure that definitionName ends on either .bpmn20.xml or .bpmn. Only then will the process engine interpret a deployment resource as a BPMN process definition.

Cheers,
Thorben

3

Thanks @thorben ! that did solve the issue.

After further testing, the suffix is required for the following definitionName of the code
deploymentBuilder.addInputStream(definitionName, definitionFileInputStream);

Leaving the following definitionName without the suffix is fine
repositoryService.createDeployment().name(definitionName);

4

Exactly. Please update your stackoverflow question as well, then others can benefit from it.

5

Hi
I have the same issue as tariqd described. I have a bpmn file called “Review_Camunda.bpmn”
and I copied the above code:

DeploymentBuilder deploymentBuilder = repositoryService.createDeployment()
.name(“Review_Camunda”)
.enableDuplicateFiltering(false)
;
deploymentBuilder.addInputStream(“Review_Camunda.bpmn”, new FileInputStream(bpmnFile));
String deploymentId = deploymentBuilder.deploy().getId();
System.out.println(deploymentId);

The code runs without error, it returns a valid deploymentID, but there are no entries in the above mentioned tables.
ACT_GE_BYTEARRAY, ACT_RE_PROCDEF

When I try to read a processInstance via

ProcessInstance processInstance = runtimeService.startProcessInstanceByKey(“Review_Camunda”);

I get an error

org.camunda.bpm.engine.exception.NullValueException: no processes deployed with key ‘Review_Camunda’: processDefinition is null

What is wrong in my code?
Cheers, Roland

6

Hi Roland,

Is your process marked as executable, as described in the following post?

Cheers,
Thorben

7

Hi Thorben
yes, it is marked as executable (as you can also see in the screenshot of the bpmn file)
Cheers, Roland

8

Can you post the application log for the time at which you make the deployment?

10

A post was split to a new topic: REST API deployment question

11

Hi Thorben

where can I find the Camunda log file? Currently I use an embedded engine that is locally started via Spring Boot and Eclipse.

In the meantime I was succesful:

  • I created another BPMN file “Review.bpmn” with the Camunda Modeler and put the BPMN file into the ./diagrams folder of my Spring Boot project. When I start the application, everything works fine, the process will automatically be started during bootstrapping.

  • Than I stopped my application and moved the “Review.bpmn” file from the ./diagram folder to another folder.

  • Afterwards I re-started my application and picked the file during runtime via upload functionality of my UI. This functionality executes the above mentioned code. In this scenario I use

String fileName = convFile.getName();
DeploymentWithDefinitions d = repositoryService.createDeployment()
.addInputStream(“Review.bpmn”,new FileInputStream(convFile))
.name(“Review.bpmn”)
.deployWithResult();
System.out.println(d.getId());
ProcessInstance processInstance = runtimeService.startProcessInstanceByKey(“Review”);

Now it works, strange! The entries in the DB are there and the process is started.

The differences to the former scenarios are:

  • The name of the BPMN file (and the processKey) changed from “Review_Camunda” to “Review”

  • I used “deployWithResult()” instead of “deploymentBuilder.deploy()”

Cheers Roland

12

Can we not deploy only from string, Please see following code:

public void deployResource() {
   BpmnModelInstance modelInstance = Bpmn.createProcess()
       .name("Example process")
       .executable()
     .startEvent()
     .userTask()
       .name("Some work to do")
     .endEvent()
     .done();
   ProcessEngines.getDefaultProcessEngine().getRepositoryService().createDeployment()
   .addModelInstance("test.bpmn", modelInstance).deploy();
 }
13