/**
 * 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.ambari.view.hive.client;

import org.apache.ambari.view.ViewContext;
import org.apache.ambari.view.utils.UserLocal;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class UserLocalConnection extends UserLocal<Connection> {
  protected final static Logger LOG =
      LoggerFactory.getLogger(UserLocalConnection.class);

  public UserLocalConnection() {
    super(Connection.class);
  }

  private UserLocal<HiveAuthCredentials> authCredentialsLocal =
      new UserLocalHiveAuthCredentials();

  @Override
  protected Connection initialValue(ViewContext context) {
      LOG.debug("creating connection for context : {}" , context);
      ConnectionFactory hiveConnectionFactory = new ConnectionFactory(context, authCredentialsLocal.get(context));
      authCredentialsLocal.remove(context);  // we should not store credentials in memory,
      // password is erased after connection established
      Connection connection = hiveConnectionFactory.create();
    LOG.debug("returning connection : {} for context : {} ", connection, context);
      return connection;
  }

}
