SpringTopicSubscription (Camunda Platform Javadocs 7.16.18-ee)

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 Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`close()`	Delegates to `TopicSubscription.close()`.
`boolean`	`isAutoOpen()`
`boolean`	`isOpen()`
`void`	`open()`	Releases the topic subscription for asynchronous execution when `isAutoOpen()` is `false`

Methods inherited from interface org.camunda.bpm.client.topic.TopicSubscription
getBusinessKey, getExternalTaskHandler, getLockDuration, getProcessDefinitionId, getProcessDefinitionIdIn, getProcessDefinitionKey, getProcessDefinitionKeyIn, getProcessDefinitionVersionTag, getProcessVariables, getTenantIdIn, getTopicName, getVariableNames, isIncludeExtensionProperties, isLocalVariables, isWithoutTenantId

- Method Detail
  - 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:
    
    TopicSubscription.close()