Introducing jobs ids validation on workflow starting

timeseries/src/main/scala/com/criteo/cuttle/timeseries/TimeSeriesScheduler.scala

@@ -103,7 +103,8 @@ object TimeSeriesCalendar {
     * @param firstDay The first day of the week for these weeks.
     */
   case class Weekly(tz: ZoneId, firstDay: DayOfWeek) extends TimeSeriesCalendar {
-    private def truncateToWeek(t: ZonedDateTime) = t.`with`(TemporalAdjusters.previousOrSame(firstDay)).truncatedTo(DAYS)
+    private def truncateToWeek(t: ZonedDateTime) =
+      t.`with`(TemporalAdjusters.previousOrSame(firstDay)).truncatedTo(DAYS)
     def truncate(t: Instant) = truncateToWeek(t.atZone(tz)).toInstant
     def next(t: Instant) = truncateToWeek(t.atZone(tz)).plus(1, WEEKS).toInstant
   }
@@ -720,9 +721,10 @@ private[timeseries] object TimeSeriesUtils {
   val UTC: ZoneId = ZoneId.of("UTC")
 
   /**
-    * Validation of cycle absence in workflow DAG and an absence the (execution, dependency) tuple that execution has
-    * a start date after an execution's start date.
-    * It's implemented based on Kahn's algorithm.
+    * Validation of:
+    * - cycle absence in workflow DAG, implemented based on Kahn's algorithm
+    * - absence the (child, parent) tuple that child has a start date before parent's start date
+    * - absence of jobs with the same id
     * @param workflow workflow to be validated
     * @return either a validation errors list or an unit
     */
@@ -755,6 +757,12 @@ private[timeseries] object TimeSeriesUtils {
 
     if (edges.nonEmpty) errors += "Workflow has at least one cycle"
 
+    workflow.vertices.groupBy(_.id).collect {
+      case (id: String, jobs) if jobs.size > 1 => id
+    } foreach (id => {
+      errors += s"Id $id is used by more than 1 job"
+    })
+
     if (errors.nonEmpty) Left(errors.toList)
     else Right(())
   }

timeseries/src/test/scala/com/criteo/cuttle/timeseries/TimeSeriesSpec.scala

@@ -81,4 +81,22 @@ class TimeSeriesSpec extends FunSuite with TestScheduling {
     assert(validationRes.isLeft, "workflow passed start date validation")
     assert(validationRes.left.get === List("Workflow has at least one cycle"), "errors messages are bad")
   }
+
+  test("it shouldn't validate a workflow that contains jobs with same ids") {
+    val id = "badJob"
+    val badJob = Job(id, hourly(date"2117-03-25T02:00:00Z"))(completed)
+    val badJobClone = Job(id, hourly(date"2117-03-24T02:00:00Z"))(completed)
+    val workflowParentChild = badJob dependsOn badJobClone
+    val workflowSiblings = badJob and badJobClone
+
+    val validationParentChild = TimeSeriesUtils.validate(workflowParentChild)
+    assert(validationParentChild.isLeft, "it means that workflow passed duplicate id validation")
+    assert(validationParentChild.left.get === List(s"Id badJob is used by more than 1 job"),
+           "it means that errors messages are bad")
+
+    val validationSiblings = TimeSeriesUtils.validate(workflowSiblings)
+    assert(validationSiblings.isLeft, "it means that workflow passed duplicate id validation")
+    assert(validationSiblings.left.get === List(s"Id badJob is used by more than 1 job"),
+           "it means that errors messages are bad")
+  }
 }