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How to test the execution of a queueable job?
This example shows how to test the execution of a queueable job in a test method. A queueable job is an asynchronous process. To ensure that this process runs within the test method, the job is submitted to the queue between the Test.startTest and Test.stopTest block.
What happens to the ID of a queueable apex job?
The ID of a queueable Apex job isn’t returned in test context— System.enqueueJob returns null in a running test. To run a job after some other processing is done first by another job, you can chain queueable jobs. To chain a job to another job, submit the second job from the execute () method of your queueable class.
When to use queueable instead of future methods?
Chaining jobs: You can chain one job to another job by starting a second job from a running job. Chaining jobs is useful if you need to do some sequential processing. Because queueable methods are functionally equivalent to future methods, most of the time you’ll probably want to use queueable instead of future methods.
How to check how many queueable jobs have been added in one transaction?
To check how many queueable jobs have been added in one transaction, call Limits.getQueueableJobs (). Because no limit is enforced on the depth of chained jobs, you can chain one job to another. You can repeat this process with each new child job to link it to a new child job.
Can you start multiple jobs in the same queueable job?
Starting multiple child jobs from the same queueable job isn’t supported. The Transaction Finalizers feature enables you to attach actions, using the System.Finalizer interface, to asynchronous Apex jobs that use the Queueable framework. A specific use case is to design recovery actions when a Queueable job fails.
Can You chain queueable jobs in apex test?
You can’t chain queueable jobs in an Apex test. Doing so results in an error. To avoid getting an error, you can check if Apex is running in test context by calling Test.isRunningTest () before chaining jobs. The execution of a queued job counts once against the shared limit for asynchronous Apex method executions.
Can you get httpresponse from a queueable class?
Since a queueable class doesnt return values, you can’t directly get HttpResponse by executing Queueable class. In a real-life scenario, a queueable class will make a callout, get response and update/create/delete a record. You can create response in such a way that the data is affected in an expected way.
What are the benefits of queueable jobs in apex?
Each queued job runs when system resources become available. A benefit of using the Queueable interface methods is that some governor limits are higher than for synchronous Apex, such as heap size limits. Queueable jobs are similar to future methods in that they’re both queued for execution, but they provide you with these additional benefits.