/*
 * 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.phoenix.query;

import java.util.concurrent.ThreadPoolExecutor;
import org.apache.phoenix.job.JobManager;
import org.apache.phoenix.memory.GlobalMemoryManager;
import org.apache.phoenix.memory.MemoryManager;
import org.apache.phoenix.optimize.QueryOptimizer;
import org.apache.phoenix.util.ReadOnlyProps;

/**
 * Base class for QueryService implementors.
 * @since 0.1
 */
public abstract class BaseQueryServicesImpl implements QueryServices {
  private final ThreadPoolExecutor executor;
  private final MemoryManager memoryManager;
  private final ReadOnlyProps props;
  private final QueryOptimizer queryOptimizer;

  public BaseQueryServicesImpl(ReadOnlyProps defaultProps, QueryServicesOptions options) {
    this.executor = JobManager.createThreadPoolExec(options.getKeepAliveMs(),
      options.getThreadPoolSize(), options.getQueueSize(), options.isGlobalMetricsEnabled());
    this.memoryManager =
      new GlobalMemoryManager(Runtime.getRuntime().maxMemory() * options.getMaxMemoryPerc() / 100);
    this.props = options.getProps(defaultProps);
    this.queryOptimizer = new QueryOptimizer(this);
  }

  @Override
  public ThreadPoolExecutor getExecutor() {
    return executor;
  }

  @Override
  public MemoryManager getMemoryManager() {
    return memoryManager;
  }

  @Override
  public final ReadOnlyProps getProps() {
    return props;
  }

  @Override
  public void close() {
    // Do not shutdown the executor as it prevents the Driver from being able
    // to attempt to open a connection in the future.
  }

  @Override
  public QueryOptimizer getOptimizer() {
    return queryOptimizer;
  }
}
