3.6 Example 6: Create and Invoke a Pipeline
This example describes a typical sequence for creating and invoking a successful pipeline on the PowerShell server, with respect to the PSRP protocol[MS-PSRP], as described in section 2.5.2.8, and in the context of the system components, as described in section 2.1.4. A detailed description of each message follows.
Prerequisites
The RunspacePool is in an opened state on the PSRP client role.
Initial system state
None.
Final system state
The WM application created and invoked a pipeline on a PSRP server.
Sequence of events
The following diagram shows the communication flow for creating and invoking a pipeline.

Figure 14: Communication flow for creating and invoking a pipeline
The following steps describe this sequence of events.
Request: The WM application sends a request through the component that implements the client role of the PSRP protocol. The request contains the necessary information and data which are implementation-specific.
Request: The PSRP client role sends the request to the PSRP server role by using the wxf:Command message, as specified in [MS-PSRP] section 3.1.5.3.3.
Response: The PSRP server role initializes the pipeline state to NotStarted, as specified in [MS-PSRP] section 3.2.1.3.2. The PowerShell server processes and validates the message and sends a success message if the validation is successful, as specified in [MS-PSRP] section 3.2.5.3.4.
Execution: The PSRP server role changes the pipeline state to Running and starts executing the pipeline, as specified in [MS-PSRP] section 3.2.1.3.2.
Request: The PSRP client role sends a wxf:Receive message, as specified in [MS-PSRP] section 3.2.5.3.7, to receive data from the pipeline on the PSRP server role.
Response: After the pipeline execution is completed, the following occurs:
The PSRP server removes the entry for this pipeline in the RunspacePool's pending pipelines queue, as specified in [MS-PSRP] section 3.2.1.2.11.
The PSRP server changes the pipeline state to Completed, as specified in [MS-PSRP] section 3.2.1.3.2.
The PSRP server constructs the Completed PIPELINE_STATE message, as specified in [MS-PSRP] section 2.2.2.21, and sends it to the PSRP client by using the wxf:ReceiveResponse message, as specified in [MS-PSRP] section 3.2.5.3.8.
Results: On receipt of the response from the server role, the PSRP client role delivers the response to the WM application.