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Batch Job Instance ID

Mule Runtime Engine versions 3.5, 3.6, and 3.7 reached End of Life on or before January 25, 2020. For more information, contact your Customer Success Manager to determine how you can migrate to the latest Mule version.

Users of Batch processing frequently need the ability to determine a Batch job’s instance ID during the execution phases of a Batch job.

Note: This feature only works in Mule 3.7 and newer.

The Batch job instance ID is useful to:

  • Pass the local job instance ID to an external system for referencing and managing data

  • Improve the job’s custom logging

  • Send email or SMS notifications for meaningful events

Example

Mule exposes the batch job instance ID through a flow variable of key batchJobInstanceId. That flow variable is available at the beginning of the input phase. The flow variable is also available in every step and in the on-complete phase.

Example job:

batch

As you see this job is pretty simple. In each of its phases, the job invokes a sub­flow which logs the output of the following MEL expression:

#[flowVars[‘batchJobInstanceId’]]

The log output produces the following – note the second block where the Job Instance ID appears as:

org.mule.api.processor.LoggerMessageProcessor: Job Instance Id is: ba01e1a0-f5c7-11e4-9414-10ddb1daeb6d

INFO 2015-05-08 18:18:09,599 [[batch].HTTP_Listener_Configuration.worker.01] com.mulesoft.module.batch.engine.DefaultBatchEngine: Starting input phase

INFO 2015-05-08 18:18:09,603 [[batch].HTTP_Listener_Configuration.worker.01] org.mule.api.processor.LoggerMessageProcessor: Job Instance Id is: ba01e1a0-f5c7-11e4-9414-10ddb1daeb6d

INFO 2015-05-08 18:18:09,603 [[batch].HTTP_Listener_Configuration.worker.01] com.mulesoft.module.batch.engine.DefaultBatchEngine: Input phase completed

INFO 2015-05-08 18:18:09,608 [[batch].HTTP_Listener_Configuration.worker.01] com.mulesoft.module.batch.engine.queue.BatchQueueLoader: Starting loading phase for instance 'ba01e1a0-f5c7-11e4-9414-10ddb1daeb6d' of job 'batchBatch'

INFO 2015-05-08 18:18:09,610 [[batch].HTTP_Listener_Configuration.worker.01] com.mulesoft.module.batch.engine.queue.BatchQueueLoader: Finished loading phase for instance ba01e1a0-f5c7-11e4-9414-10ddb1daeb6d of job batchBatch. 1 records were loaded

INFO 2015-05-08 18:18:09,615 [[batch].HTTP_Listener_Configuration.worker.01] com.mulesoft.module.batch.engine.DefaultBatchEngine: Started execution of instance 'ba01e1a0-f5c7-11e4-9414-10ddb1daeb6d' of job 'batchBatch'

INFO 2015-05-08 18:18:09,624 [batch-job-batchBatch-work-manager.01] org.mule.api.processor.LoggerMessageProcessor: Job Instance Id is: ba01e1a0-f5c7-11e4-9414-10ddb1daeb6d

INFO 2015-05-08 18:18:09,643 [batch-job-batchBatch-work-manager.01] com.mulesoft.module.batch.engine.DefaultBatchEngine: Starting execution of onComplete phase for instance ba01e1a0-f5c7-11e4-9414-10ddb1daeb6d of job batchBatch

INFO 2015-05-08 18:18:09,644 [batch-job-batchBatch-work-manager.01] org.mule.api.processor.LoggerMessageProcessor: Job Instance Id is: ba01e1a0-f5c7-11e4-9414-10ddb1daeb6d

INFO 2015-05-08 18:18:09,644 [batch-job-batchBatch-work-manager.01] com.mulesoft.module.batch.engine.DefaultBatchEngine: Finished execution of onComplete phase for instance ba01e1a0-f5c7-11e4-9414-10ddb1daeb6d of job batchBatch

INFO 2015-05-08 18:18:09,644 [batch-job-batchBatch-work-manager.01] com.mulesoft.module.batch.engine.DefaultBatchEngine: Finished execution for instance 'ba01e1a0-f5c7-11e4-9414-10ddb1daeb6d' of job 'batchBatch'. Total Records processed: 1. Successful records: 1. Failed Records: 0

See Also