| /* |
| * 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.bookkeeper.clients.impl.container; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.collect.Maps; |
| import java.util.concurrent.ConcurrentMap; |
| import org.apache.bookkeeper.clients.impl.channel.StorageServerChannelManager; |
| import org.apache.bookkeeper.clients.impl.internal.api.LocationClient; |
| import org.apache.bookkeeper.common.util.OrderedScheduler; |
| |
| /** |
| * A manager manages channels/clients to storage containers. |
| */ |
| public class StorageContainerChannelManager implements AutoCloseable { |
| |
| private final StorageContainerChannelFactory factory; |
| private final ConcurrentMap<Long, StorageContainerChannel> scChannels; |
| |
| public StorageContainerChannelManager(StorageServerChannelManager channelManager, |
| LocationClient locationClient, |
| OrderedScheduler scheduler) { |
| this((scId) -> new StorageContainerChannel( |
| scId, |
| channelManager, |
| locationClient, |
| scheduler.chooseThread(scId))); |
| } |
| |
| @VisibleForTesting |
| StorageContainerChannelManager(StorageContainerChannelFactory factory) { |
| this.factory = factory; |
| this.scChannels = Maps.newConcurrentMap(); |
| } |
| |
| @VisibleForTesting |
| int getNumChannels() { |
| return scChannels.size(); |
| } |
| |
| /** |
| * Retrieve the storage container channel for storage container {@code scId}. |
| * |
| * <p>This call will create the storage container channel if it doesn't exist before. |
| * |
| * @param scId storage container id. |
| * @return storage container channel. |
| */ |
| public StorageContainerChannel getOrCreate(long scId) { |
| StorageContainerChannel scChannel = scChannels.get(scId); |
| if (null == scChannel) { |
| StorageContainerChannel newChannel = factory.createStorageContainerChannel(scId); |
| StorageContainerChannel oldChannel = scChannels.putIfAbsent(scId, newChannel); |
| if (null == oldChannel) { |
| scChannel = newChannel; |
| } else { |
| scChannel = oldChannel; |
| } |
| } |
| return scChannel; |
| } |
| |
| /** |
| * Remove the storage container channel from the channels map. |
| * |
| * @param scId storage container channel id. |
| * @return the removed storage container channel. |
| */ |
| public StorageContainerChannel remove(long scId) { |
| return scChannels.remove(scId); |
| } |
| |
| @Override |
| public void close() throws Exception { |
| scChannels.clear(); |
| } |
| } |