| /* |
| * 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.iotdb.commons.client; |
| |
| import org.apache.iotdb.commons.client.exception.BorrowNullClientManagerException; |
| import org.apache.iotdb.commons.client.exception.ClientManagerException; |
| import org.apache.iotdb.commons.utils.TestOnly; |
| |
| import org.apache.commons.pool2.KeyedObjectPool; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Optional; |
| |
| public class ClientManager<K, V> implements IClientManager<K, V> { |
| |
| private static final Logger LOGGER = LoggerFactory.getLogger(ClientManager.class); |
| |
| private final KeyedObjectPool<K, V> pool; |
| |
| ClientManager(IClientPoolFactory<K, V> factory) { |
| pool = factory.createClientPool(this); |
| } |
| |
| @TestOnly |
| public KeyedObjectPool<K, V> getPool() { |
| return pool; |
| } |
| |
| @Override |
| public V borrowClient(K node) throws ClientManagerException { |
| if (node == null) { |
| throw new BorrowNullClientManagerException(); |
| } |
| try { |
| return pool.borrowObject(node); |
| } catch (Exception e) { |
| throw new ClientManagerException(e); |
| } |
| } |
| |
| /** |
| * return a client V for node K to the {@link ClientManager}. |
| * |
| * <p>Note: We do not define this interface in {@link IClientManager} to make you aware that the |
| * return of a client is automatic whenever a particular client is used. |
| */ |
| public void returnClient(K node, V client) { |
| Optional.ofNullable(node) |
| .ifPresent( |
| x -> { |
| try { |
| pool.returnObject(node, client); |
| } catch (Exception e) { |
| LOGGER.warn("Return client {} for node {} to pool failed.", client, node, e); |
| } |
| }); |
| } |
| |
| @Override |
| public void clear(K node) { |
| Optional.ofNullable(node) |
| .ifPresent( |
| x -> { |
| try { |
| pool.clear(node); |
| } catch (Exception e) { |
| LOGGER.warn("Clear all client in pool for node {} failed.", node, e); |
| } |
| }); |
| } |
| |
| @Override |
| public void close() { |
| pool.close(); |
| } |
| } |