How to add variable of an existing processinstance?

Camunda 7 Topics Discussion & Questions
1

Hi,
I am new with Camunda BPM. I Can start my Process and change state of my process instance.
I have to add some variables when another application call a custom Camunda custom endpoint with business key.
How to add a variable at a running instance ? I just have a business key to retrieve process instance.

Here is my codein my custom endpoint

      ProcessInstance processInstance = processEngine.getRuntimeService() .createProcessInstanceQuery()
     .variableValueEquals("businessKey", 657).singleResult();

How to add variable(key and value) in this process instance ?
Thanks

2

@pracede you can refer this page:

https://docs.camunda.org/manual/7.13/user-guide/process-engine/variables/

3

Tank you for your answer . How to get the execution from processInstance.
Here is the code to use but i don’t undestand i to get execution :

runtimeService.setVariableLocal(execution.getId(), "order", serializedValue);
4

@pracedeb how do you setup your camunda application? Spring boot or tomcat distribution?

5

It’s a spring boot application

6

@pracede refer this code below:

@Service
public class ProcessEngineService {

  @Autowired
  private RuntimeService runtimeService;

  public void setProcessVariablesToInstance(String processInstanceBusinessKey) {
    Execution execution = runtimeService.createExecutionQuery().processInstanceBusinessKey(processInstanceBusinessKey)
        .singleResult();

    CustomerDTO customerDTO = CustomerDTO.builder().id("C3462").name("Willy Brandt").address("Germany").build();

    ObjectValue customerDataValue = Variables.objectValue(customerDTO)
        .serializationDataFormat(Variables.SerializationDataFormats.JAVA).create();

    Map<String, Object> variableMap = new HashMap<>();
    variableMap.put("customerDataValue", customerDataValue);
    variableMap.put("category", "politics");
    variableMap.put("activeStatus", true);

    //to set multiple variables to process instance
    runtimeService.setVariables(execution.getId(), variableMap);
    
    StringValue typedStringValue = Variables.stringValue("a string value");
    
    //to set one variable to process instance
    runtimeService.setVariable(execution.getId(), "stringVariable", typedStringValue);
  }
}
7