Temporal best practises to execute some cleanup activity before terminating workflow

antonio.perez · August 1, 2023, 2:13pm

Can you send a cancellation request instead of terminating the workflow?

You can learn about the difference here:

So just wanted to understand what is the best way to do cleanup activities?

With cancellation, Inside the activity, you can handle ActivityCompletionException and do any additional cleanup https://github.com/temporalio/samples-java/blob/f107c79e29453ecd43dce522dfd1c980439b3762/core/src/main/java/io/temporal/samples/hello/HelloCancellationScope.java#L207

The same in your workflow code , you can handle the exception and create a detached scope to run an activity

github.com

temporalio/samples-java/blob/f107c79e29453ecd43dce522dfd1c980439b3762/core/src/main/java/io/temporal/samples/hello/HelloDetachedCancellationScope.java#L136


      
                      .setCancellationType(ActivityCancellationType.WAIT_CANCELLATION_COMPLETED)
                      .setHeartbeatTimeout(Duration.ofSeconds(2))
                      .build());
          
          @Override
          public String getGreeting(String name) {
            try {
              this.greeting = activities.sayHello(name);
              return greeting;
            } catch (ActivityFailure af) {
              // Create a CancellationScope that is not linked to a parent scope
              // This can be used in the "cleanup" code after the Workflow Execution has been cancelled.
              CancellationScope detached =
                  Workflow.newDetachedCancellationScope(() -> greeting = activities.sayGoodBye(name));
              detached.run();
              throw af;
            }
          }
          
          @Override
          public String queryGreeting() {

Antonio

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Temporal best practises to execute some cleanup activity before terminating workflow

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