Errata exists for this version of the document.
The PubSubState is used to expose and control the operation of a PubSub component. It is an enumeration of the possible states. The enumeration values are described in Table 1.
|
Value |
Description |
|
Disabled_0 |
The PubSub component is configured but currently disabled. |
|
Paused_1 |
The PubSub component is enabled but currently paused by a parent component. The parent component is either Disabled_0 or Paused_1. |
|
Operational_2 |
The PubSub component is operational. |
|
Error_3 |
The PubSub component is in an error state. |
Figure 19 depicts the PubSub components that have a PubSub state and their parent-child relationship. State changes of children are based on changes of the parent state. The root of the hierarchy is the PublishSubscribe component.
Figure 19 – PubSub Component State Dependencies
Figure 20 describes the formal state machine with the possible transitions.
Figure 20 – PubSubState State Machine
Table 2 formally defines the transitions of the state machine.
Table 2 – PubSubState State Machine
|
Source State |
Target State |
Trigger Description |
|
Disabled_0 |
Paused_1 |
The component was successfully enabled but the parent component is in the state Disabled_0 or Paused_1. |
|
Disabled_0 |
Operational_2 |
The component was successfully enabled. |
|
Paused_1 |
Disabled_0 |
The component was successfully disabled. |
|
Paused_1 |
Operational_2 |
The state of the parent component changed to Operational_2. |
|
Operational_2 |
Disabled_0 |
The component was successfully disabled. |
|
Operational_2 |
Paused_1 |
The state of the parent component changed to Disabled_0 or Paused_1. |
|
Operational_2 |
Error_3 |
There is a pending error situation for the related PubSub component. |
|
Error_3 |
Disabled_0 |
The component was successfully disabled. |
|
Error_3 |
Paused_1 |
The state of the parent component changed to Disabled_0 or Paused_1. |
|
Error_3 |
Operational_2 |
The error situation was resolved for the related PubSub component. |