Al-assad commented on PR #2989:
URL:
https://github.com/apache/incubator-streampark/pull/2989#issuecomment-1706332399
@ChengJie1053 A small tip, it can use this style to consume ZStream safely 😃：
```scala
private val alterStateList =
Array(FlinkAppState.FAILED, FlinkAppState.LOST,
FlinkAppState.RESTARTING, FlinkAppState.FINISHED)
def subscribeJobStatusChange: UIO[Unit] = {
FlinkK8sObserver.evaluatedJobSnaps
.flatSubscribeValues()
// Get Application records and convert JobSnapshot to Application
.mapZIO { jobSnap =>
ZIO
.attemptBlocking {
Option(applicationService.getById(jobSnap.appId))
.map(app => setByJobStatusCV(app, jobSnap))
}
.catchAll { err =>
logError(s"Fail to get Application records: ${err.getMessage}")
.as(None) @@ annotated("appId" -> jobSnap.appId.toString)
}
}
.filter(_.nonEmpty)
.map(_.get)
// Save Application records
.tap { app =>
ZIO
.attemptBlocking(applicationService.persistMetrics(app))
.retryN(3)
.tapError(err => logError(s"Fail to persist Application status:
${err.getMessage}"))
.ignore @@ annotated("appId" -> app.getAppId)
}
// Alert for unhealthy states in parallel
.mapZIOPar(10) { app =>
val state = FlinkAppState.of(app.getState)
ZIO
.attemptBlocking(alertService.alert(app, state))
.when(alterStateList.contains(state))
.retryN(3)
.tapError(err => logError(s"Fail to alter unhealthy application
state: ${err.getMessage}"))
.ignore @@ annotated("appId" -> app.getAppId, "state" ->
state.toString)
}
.runDrain
}
```
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