/*
 * 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.slider.server.appmaster.model.mock

import groovy.util.logging.Slf4j
import org.apache.hadoop.yarn.api.records.ContainerId
import org.apache.hadoop.yarn.api.records.Priority
import org.apache.hadoop.yarn.client.api.AMRMClient
import org.apache.slider.server.appmaster.operations.AbstractRMOperation
import org.apache.slider.server.appmaster.operations.ContainerReleaseOperation
import org.apache.slider.server.appmaster.operations.ContainerRequestOperation
import org.apache.slider.server.appmaster.operations.RMOperationHandler

@Slf4j
class MockRMOperationHandler extends RMOperationHandler {
  public List<AbstractRMOperation> operations = [];
  int requests, releases;
  // number available to cancel
  int availableToCancel = 0;
  // count of cancelled values. This must be explicitly set
  int cancelled

  @Override
  public void releaseAssignedContainer(ContainerId containerId) {
    operations.add(new ContainerReleaseOperation(containerId))
    log.info("Releasing container ID " + containerId.getId())
    releases++;
  }

  @Override
  public void addContainerRequest(AMRMClient.ContainerRequest req) {
    operations.add(new ContainerRequestOperation(req))
    log.info("Requesting container role #" + req.priority);
    requests++;
  }

  @Override
  int cancelContainerRequests(
      Priority priority1,
      Priority priority2,
      int count) {
    int releaseable = Math.min(count, availableToCancel)
    availableToCancel -= releaseable;
    cancelled += releaseable;
    return releaseable;
  }

/**
 * clear the history
 */
  public void clear() {
    operations.clear()
    releases = 0;
    requests = 0;
  }
}