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From andrewor14 <...@git.apache.org>
Subject [GitHub] spark pull request: [SPARK-6284][MESOS] Add mesos role, principal ...
Date Wed, 25 Mar 2015 00:51:46 GMT
Github user andrewor14 commented on a diff in the pull request:

    https://github.com/apache/spark/pull/4960#discussion_r27087566
  
    --- Diff: core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerUtils.scala
---
    @@ -0,0 +1,116 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one or more
    + * contributor license agreements.  See the NOTICE file distributed with
    + * this work for additional information regarding copyright ownership.
    + * The ASF licenses this file to You under the Apache License, Version 2.0
    + * (the "License"); you may not use this file except in compliance with
    + * the License.  You may obtain a copy of the License at
    + *
    + *    http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +
    +package org.apache.spark.scheduler.cluster.mesos
    +
    +import java.util.List
    +
    +import scala.collection.JavaConversions._
    +import scala.collection.mutable.ArrayBuffer
    +
    +import org.apache.mesos.Protos._
    +import org.apache.mesos.{Scheduler, MesosSchedulerDriver}
    +import org.apache.spark.{Logging, SparkConf}
    +import org.apache.mesos.protobuf.ByteString
    +import org.apache.mesos.Protos.Value.Type
    +
    +
    +private[spark] trait MesosSchedulerUtils extends Logging {
    +  def createSchedulerDriver(
    +      scheduler: Scheduler,
    +      sparkUser: String,
    +      appName: String,
    +      masterUrl: String,
    +      conf: SparkConf) = {
    +    val fwInfoBuilder = FrameworkInfo.newBuilder().setUser(sparkUser).setName(appName)
    +    var credBuilder: Option[Credential.Builder] = None
    +
    +    conf.getOption("spark.mesos.principal").foreach { principal =>
    +      fwInfoBuilder.setPrincipal(principal)
    +      credBuilder = Option(Credential.newBuilder().setPrincipal(principal))
    +    }
    +
    +    conf.getOption("spark.mesos.secret").foreach { secret =>
    +      credBuilder = Option(credBuilder.getOrElse(Credential.newBuilder())
    +        .setSecret(ByteString.copyFromUtf8(secret)))
    +    }
    +
    +    conf.getOption("spark.mesos.role").foreach { role =>
    +      fwInfoBuilder.setRole(role)
    +    }
    +
    +    if (credBuilder.isDefined) {
    +      new MesosSchedulerDriver(
    +        scheduler, fwInfoBuilder.build, masterUrl, credBuilder.get.build())
    +    } else {
    +      new MesosSchedulerDriver(scheduler, fwInfoBuilder.build, masterUrl)
    +    }
    +  }
    +
    +  // Helper function to pull out a resource from a Mesos Resources protobuf
    +  def getResource(res: List[Resource], name: String): Double = {
    +    var resource = 0.0
    +    // A resource can have multiple values in the offer since it can either be from
    +    // a specific role or wildcard.
    +    for (r <- res if r.getName == name) {
    +      resource += r.getScalar.getValue
    +
    +    }
    +    resource
    +  }
    +
    +  /**
    +   * Partition the existing resource list based on the resources requested and
    +   * the remaining resources.
    +   * @return The remaining resources list and the used resources list.
    +   */
    +  def partitionResources(
    +      resources: List[Resource],
    +      resourceName: String,
    +      count: Double): (List[Resource], List[Resource]) = {
    +    var remain = count
    +    var usedResources = new ArrayBuffer[Resource]
    +    val newResources = resources.collect {
    +      case r => {
    +        if (remain > 0 &&
    +          r.getType == Type.SCALAR &&
    +          r.getScalar.getValue > 0.0 &&
    +          r.getName == resourceName) {
    +          val usage = Math.min(remain, r.getScalar.getValue)
    +          usedResources += Resource.newBuilder()
    +            .setName(resourceName)
    +            .setRole(r.getRole)
    +            .setType(Value.Type.SCALAR)
    +            .setScalar(Value.Scalar.newBuilder().setValue(usage).build())
    +            .build()
    +          remain -= usage
    +          Resource.newBuilder()
    +            .setName(resourceName)
    +            .setRole(r.getRole)
    +            .setType(Value.Type.SCALAR)
    +            .setScalar(Value.Scalar.newBuilder().setValue(r.getScalar.getValue - usage).build())
    +            .build()
    +        } else {
    +          r
    +        }
    +      }
    +    }
    +
    +    (newResources.filter(r => r.getType != Type.SCALAR || r.getScalar.getValue >
0.0).toList,
    +      usedResources.toList)
    --- End diff --
    
    for readability, would you mind putting
    ```
    val remainingResources = newResources.toList.filter { r =>
      ...
    }
    (remainingResources, usedResources.toList)
    ```


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