Cancel Workflow Via API

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I would recommend using your business identifier as a workflow ID. Then you don’t need to perform any lookups to perform operations on the workflows by their business id. In Java SDK you assign workflow id through WorkflowOptions:

    WorkflowOptions workflowOptions =
        WorkflowOptions.newBuilder().setTaskQueue(TASK_QUEUE).setWorkflowId("BusinessId").build();
    GreetingWorkflow workflow = client.newWorkflowStub(GreetingWorkflow.class, workflowOptions);