Github user squito commented on a diff in the pull request: https://github.com/apache/spark/pull/5563#discussion_r33274248 --- Diff: core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerUtils.scala --- @@ -86,10 +89,106 @@ private[mesos] trait MesosSchedulerUtils extends Logging { /** * Get the amount of resources for the specified type from the resource list */ - protected def getResource(res: List[Resource], name: String): Double = { + protected def getResource(res: JList[Resource], name: String): Double = { for (r <- res if r.getName == name) { return r.getScalar.getValue } 0.0 } + + + /** Helper method to get the key,value-set pair for a Mesos Attribute protobuf */ + private[mesos] def getAttribute(attr: Attribute): (String, Set[String]) = + (attr.getName, attr.getText.getValue.split(',').toSet) + + + /** Build a Mesos resource protobuf object */ + private[mesos] def createResource(resourceName: String, quantity: Double): Protos.Resource = { + Resource.newBuilder() + .setName(resourceName) + .setType(Value.Type.SCALAR) + .setScalar(Value.Scalar.newBuilder().setValue(quantity).build()) + .build() + } + + + /** + * Match the requirements (if any) to the offer attributes. + * if attribute requirements are not specified - return true + * else if attribute is defined and no values are given, simple attribute presence is preformed + * else if attribute name and value is specified, subset match is performed on slave attributes + */ + private[mesos] def matchesAttributeRequirements( + slaveOfferConstraints: Map[String, Set[String]], + offerAttributes: Map[String, Set[String]]): Boolean = + if (slaveOfferConstraints.isEmpty) { + true + } else { + slaveOfferConstraints.forall { --- End diff -- I think dragos mentioned this for another case earlier -- I don't think you need the `if (slaveOfferConstraints.isEmpty)` since `forall` takes care of it for you ```scala scala> List().forall{_ => 1 > 2} res0: Boolean = true ```
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