Package org.camunda.bpm.client.spring

Interface SpringTopicSubscription

All Superinterfaces:
TopicSubscription
All Known Implementing Classes:
PropertiesAwareSpringTopicSubscription, SpringTopicSubscriptionImpl
public interface SpringTopicSubscription extends TopicSubscription

Represents a topic subscription of the External Task Client.

Existence of this bean means that the subscription has been created but might have not been fully initialized or released to the External Task Client. The SubscriptionInitializedEvent is emitted as soon as the subscription has been fully initialized.

You can check if the subscription has been released to the External Task Client with isOpen()

  • Method Details

    • isAutoOpen

      boolean isAutoOpen()
      Returns:
      • true when the topic subscription is automatically released for execution
      • false when you need to call open() to release the topic for execution

    • open

      void open()
      Releases the topic subscription for asynchronous execution when isAutoOpen() is false
      Throws:
      ExternalTaskClientException -
      • if topic name is null or an empty string
      • if lock duration is not greater than zero
      • if external task handler is null
      • if topic name has already been subscribed
      NotInitializedException - if called before fully initialized

    • isOpen

      boolean isOpen()
      Returns:
      • true when the topic subscription is already released for execution
      • false when the topic subscription is not already released for execution; call open() to release the topic for execution

    • close

      void close()
      Delegates to TopicSubscription.close().
      Specified by:
      close in interface TopicSubscription
      Throws:
      NotInitializedException - if called before fully initialized
      NotOpenedException - if called before subscription has been opened
      See Also: