How to Continue-As-New in Java

Temporal SDK allows you to use Continue-As-New in various ways.

To continue execution of the same Workflow that is currently running, use:

Workflow.continueAsNew(input1, ...);

To continue execution of a currently running Workflow as a completely different Workflow type, use Workflow.newContinueAsNewStub(). For example, in a Workflow class called YourWorkflow, we can create a Workflow stub with a different type, and call its Workflow method to continue execution as that type:

MyOtherWorkflow continueAsNew = Workflow.newContinueAsNewStub(MyOtherWorkflow.class);
coninueAsNew.greet(input);

To provide ContinueAsNewOptions options in Workflow.newContinueAsNewStub() use:

ContinueAsNewOptions options = ContinueAsNewOptions.newBuilder()
        .setTaskQueue("newTaskQueueName")
        .build();

MyOtherWorkflow continueAsNew = Workflow.newContinueAsNewStub(MyOtherWorkflow.class, options);
// ...
continueAsNew.greet(input);

Providing these options allows you to continue Workflow Execution as a new Workflow run, with a different Workflow Type, and on a different Task Queue.

Java Workflow reference: https://www.javadoc.io/doc/io.temporal/temporal-sdk/latest/io/temporal/workflow/package-summary.html