ThreadUsage.java

/**
 * Copyright 2015 StreamSets Inc.
 *
 * Licensed under 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 com.streamsets.dc.execution.manager.standalone;

public enum ThreadUsage {

  STANDALONE(22), //2.2 * ExecutorConstants.RUNNER_THREAD_POOL_SIZE_MULTIPLIER
  CLUSTER(2), //0.2 * ExecutorConstants.RUNNER_THREAD_POOL_SIZE_MULTIPLIER
  SLAVE(22); //2.2 * ExecutorConstants.RUNNER_THREAD_POOL_SIZE_MULTIPLIER

  private int resourceCount;

  ThreadUsage(int resourceCount) {
    this.resourceCount = resourceCount;
  }

  public int reserve(int currentCapacity) {
    return currentCapacity - resourceCount;
  }

  public int release(int currentCapacity) {
    return currentCapacity + resourceCount;
  }
}