Normal flow #

The diagram shows the normal Azure DevOps and Aggregator interaction.

sequenceDiagram User ->>+ AzDO : New Work Item AzDO -->>- User : Work Item(id=42, ver=1) activate Aggregator AzDO ->>+ Aggregator : event(workitem.created, id=42) Aggregator ->>+ AzDO : readWorkItem(id=42) AzDO -->>- Aggregator : ver=1 Aggregator ->> DataModel : new(WorkItem, id=42, ver=1) Aggregator ->>+ ruleA : triggers ruleA ->> DataModel : get(WorkItem, id=42) ruleA ->> DataModel : update(WorkItem, id=42) ruleA -->>- Aggregator : returns Aggregator ->> AzDO : updateWorkItem(id=42, ver=1) AzDO --> Aggregator : ver=2 deactivate Aggregator opt Cycle until exahustion activate Aggregator AzDO ->>+ Aggregator : event(workitem.updated, id=42, ver=2) Aggregator ->> DataModel : new(WorkItem, id=42, ver=2) Aggregator ->>+ ruleA : triggers ruleA ->> DataModel : get(WorkItem, id=42) ruleA ->> DataModel : update(WorkItem, id=42) ruleA -->>- Aggregator : returns Aggregator ->> AzDO : updateWorkItem(id=42, ver=2) AzDO --> Aggregator : ver=3 deactivate Aggregator end

Parallel changes #

Sequence diagram showing a failing Azure DevOps and Aggregator interaction.

sequenceDiagram User ->>+ AzDO : New Work Item AzDO -->>- User : Work Item(id=42, ver=1) activate Aggregator AzDO ->>+ Aggregator : event(workitem.created, id=42) Aggregator ->>+ AzDO : readWorkItem(id=42) AzDO -->>- Aggregator : ver=1 Aggregator ->> DataModel : new(WorkItem, id=42, ver=1) Aggregator ->>+ rule : triggers rule ->> DataModel : get(WorkItem, id=42) Note right of User: Same or another user User ->>+ AzDO : Update Work Item AzDO -->>- User : Work Item(id=42, ver=2) rule ->> DataModel : update(WorkItem, id=42) rule -->>- Aggregator : returns rect rgb(240, 120, 120) Aggregator -X AzDO : updateWorkItem(id=42, ver=1) end deactivate Aggregator activate Aggregator AzDO ->>+ Aggregator : event(workitem.updated, id=42, ver=2) deactivate Aggregator

VS403351: Test Operation for path /rev failed

The VS403351 error happens because Aggregator adds a specific check to the JSON Patch document for the Work Item revision.

  Operation = Operation.Test,
  Path = "/rev",
  Value = item.Rev

It can be disabled on a per rule base using the check revision directive.