BuildTaskService - capturing task execution information

BuildTaskService.kt

abstract class BuildTaskService : BuildService<BuildServiceParameters.None>, OperationCompletionListener {

    var fromCacheTasksCount = 0
    var upToDateTasksCount = 0
    var executedTasksCount = 0

    var buildPhaseFailureMessage: String? = null
    val buildPhaseFailed: Boolean
        get() = buildPhaseFailureMessage != null

    override fun onFinish(event: FinishEvent?) {
        if (event == null || event !is TaskFinishEvent)
            return

        when {
            event.isFromCache() -> {
                fromCacheTasksCount++
            }
            event.isUpToDate() -> {
                upToDateTasksCount++
            }
            event.isSuccess() -> {
                executedTasksCount++
            }
        }

        if (event.result is TaskFailureResult) {
            buildPhaseFailureMessage = 
                (event.result as TaskFailureResult).failures.firstOrNull()?.message 
                    ?: "${event.displayName} Failed without message"
        }
    }

    private fun FinishEvent.isUpToDate(): Boolean {
        return this.displayName.endsWith("UP-TO-DATE")
    }

    private fun FinishEvent.isFromCache(): Boolean {
        return this.displayName.endsWith("FROM-CACHE")
    }

    private fun FinishEvent.isSuccess(): Boolean {
        return this.displayName.endsWith("SUCCESS")
    }
}