| /* |
| * 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.drill.jdbc; |
| |
| import java.sql.Connection; |
| import java.sql.SQLException; |
| import java.util.Map; |
| |
| import com.google.common.collect.Maps; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * A connection factory that caches connections based on given {@link org.apache.drill.jdbc.ConnectionInfo}. |
| */ |
| public class MultiConnectionCachingFactory implements CachingConnectionFactory { |
| private static final Logger logger = LoggerFactory.getLogger(MultiConnectionCachingFactory.class); |
| |
| private final ConnectionFactory delegate; |
| private final Map<ConnectionInfo, Connection> cache = Maps.newHashMap(); |
| |
| public MultiConnectionCachingFactory(ConnectionFactory delegate) { |
| this.delegate = delegate; |
| } |
| |
| /** |
| * Creates a {@link org.apache.drill.jdbc.NonClosableConnection connection} and caches it. |
| * |
| * The returned {@link org.apache.drill.jdbc.NonClosableConnection connection} does not support |
| * {@link java.sql.Connection#close()}. Consumer must call {#close} to close the cached connections. |
| */ |
| @Override |
| public Connection getConnection(ConnectionInfo info) throws SQLException { |
| Connection conn = cache.get(info); |
| if (conn == null) { |
| conn = delegate.getConnection(info); |
| cache.put(info, conn); |
| } |
| return new NonClosableConnection(conn); |
| } |
| |
| /** |
| * Closes all active connections in the cache. |
| */ |
| public void closeConnections() throws SQLException { |
| for (Connection conn : cache.values()) { |
| conn.close(); |
| } |
| } |
| } |