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Idea / RFE Review. Apologies for the length of time this idea has been in the status of Uncommitted Candidate / Future Consideration. Since the time this was initially raised, the product's capabilities have evolved and in ACEv11 and ACEv12 the administrative REST API caters for this use case.
You can issue a GET query against the flow using a URL like this:
/apiv2/servers/{server}/applications/{application}/messageflows/{messageflow}
The response will include an "active" section which looks a bit like this:
"active": {
"activeUserExitList": "",
"activityLogUri": "/apiv2/servers/default/resource-managers/activity-log-manager?log_type=MSGFLOW&application=ExampleRoutingRoute&library=&message_flow=RoutingRoute",
"injectionMode": false,
"isRunning": true,
"monitoring": "inactive",
"monitoringProfile": "",
"resourceState": "stateStarted",
"startupEpoch": 1626703985,
"startupTime": "2021-07-19T14:13:05Z",
"state": "started",
"testRecordMode": false,
"threadInstancesStartImmediately": false,
"threads": 1,
"threadsCapacity": 11,
"threadsInUse": 1,
"userDefinedProperties": {
"local": {},
"subflows": {},
"globalOverrides": {},
"all": {}
}
}
As shown above there are now properties for both threadsCapacity and threadsInUse. Status of the idea is updated to delivered.
Due to processing by IBM, this request was reassigned to have the following updated attributes:
Brand - WebSphere
Product family - Integration
Product - IBM Integration Bus (WebSphere Message Broker) - IIB
For recording keeping, the previous attributes were:
Brand - WebSphere
Product family - Connectivity and Integration
Product - IBM Integration Bus (WebSphere Message Broker) - IIB
This sounds like a possible use case for the global cache being used to store the current number of in-flight messages being processed in FLOW2, which you could query from FLOW1 running in a different execution group. You can query current AdditionalInstances of a flow via API, but this is not the same as the number of messages currently being processed (instances might have been used but might currently be waiting for further traffic). You could also use Accounting & Statistics to get a historical (snapshot or archive) view of number of messages processed by a flow during a particular time interval, but again this is slightly different to a real-time activity view of how many messages are currently in-flight within a flow.
Regardless of the global cache suggestion, making this kind of use case easier to achieve with IIB sounds like a sensible enhancement to improve the product, so status of this RFE is updated to Uncommitted Candidate.