Workflow Revisions

To effectively manage the inevitable life-cycle of a Vantage Workflow; the
ability to manage and control the revision level of a workflow is provided
within the Vantage Cloud Port Hosted Workflows interface within Telestream

What the Workflow Revision feature allows is the ability to have a single
Vantage Cloud Port Hosted Workflow contain multiple ‘revisions’ of a Vantage
workflow. A user may then indicate which ‘revision’ should be the active

The active revision of a workflow indicates the underlying workflow definition
which shall be utilized for all interaction when a specific Hosted Workflow is
targeted for use in Vantage Cloud Port Hosted Workflows.

To fully understand this concept, consider the following Vantage workflow (this
is the same workflow which was detailed in previous sections of this document):


When uploaded to Telestream Cloud, this workflow appears in the workflow list


If a user needs to make a change to this workflow, for example, adding a new
variable binding; the workflow would be modified in Vantage (on-prem) to make
the required update. The new workflow:


NOTE: The arrow above shows the newly added variable (a variable named: ‘File
Name’ which shall control the output filename).

If a traditional upload of this workflow is performed, the workflow list in
Vantage Cloud Port Hosted Workflows would appear similar to:


The issue with this is that the new workflow (‘API Example (Rev 2)’) will have a
new distinct workflow identifier. If your client application has been built to
interact with the original workflow (‘API Example 2’) via its workflow
identifier; then the client application will need to be updated to refer to the
ID associated with the newly added workflow (‘API Example (Rev 2)’).

By itself, this is not too much of an issue (as other API updates would be
required to address the new variables (for example: the new File Name variable
which was illustrated above).

The other issue this leads to is a proliferation of ‘one-off’ workflows in the
workflow list. If this behavior is repeated several times, there will many
different entries for the workflow ‘API Example 2’, example: API Example (Rev
2), API Example (Rev 3), etc.… This process would lead to severe confusion due
to the sheer number of repeated workflow entries.

Instead of using the workflow list to host multiple distinct versions of a
workflow, the Workflow Revisions feature allows a single workflow to have many
different versions loaded as its underlying definition.

Consider the details view of the original workflow (API Example 2):


The view above shows the contents of the original version of ‘API Example 2’.

The Workflow Revisions Feature is available from the pulldown next to the
‘Submit job’ button in the upper right corner:


The ‘Add Revision’ option allows a new Compiled Workflow Document to be loaded
and stored within this existing workflow. At any time, a user may then to elect
to make the new ‘revision’ the active revision.

To load the new version of the Compiled Workflow Document, a user would select
the ‘Add Revision’ option above, the following dialog shall appear:


A user would use the ‘Browse…’ button to open a file browser and select the new
CWD document which had previously been exported from Vantage. A Comment can then
be entered to provide a description of the new workflow:


When the ‘ADD’ button is pressed, the new workflow definition shall be loaded as
a new revision in the existing workflow. The Details panel for this workflow
shall update to reflect the presence of multiple revisions:


The ‘Revisions’ section (above in Yellow) is the new view that appears when a
specific workflow contains multiple revisions.

Using the Revisions section, a user may indicate the revision that should be
considered the DEFAULT revision for this workflow.

The ‘Revision’ pulldown can be used to show details about a given revision, or
it can be set to ‘All’ to provide a list view of all revisions loaded for the
current workflow.

The following illustrates the state of the ‘API Example 2’ workflow following
the upload of a new revision:


This view provides a clear indication that the original version of the workflow
(uploaded on April 14th) is currently active.

The new version (ID 2) is listed with a status of ‘Staging’ to indicate it is
not currently in use.

NOTE: The comment that was provided when this revision was uploaded (‘Add the
File Name variable to control the output filename.’) is present to allow a hint
as to what changed.

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