| /* |
| * 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.hadoop.hbase.quotas; |
| |
| import java.util.Objects; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| |
| import org.apache.commons.lang3.builder.HashCodeBuilder; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.client.Connection; |
| import org.apache.yetus.audience.InterfaceAudience; |
| |
| import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting; |
| |
| /** |
| * A factory for getting instances of {@link FileArchiverNotifier}. |
| */ |
| @InterfaceAudience.Private |
| public final class FileArchiverNotifierFactoryImpl implements FileArchiverNotifierFactory { |
| private static final FileArchiverNotifierFactoryImpl DEFAULT_INSTANCE = |
| new FileArchiverNotifierFactoryImpl(); |
| private static volatile FileArchiverNotifierFactory CURRENT_INSTANCE = DEFAULT_INSTANCE; |
| private final ConcurrentMap<TableName,FileArchiverNotifier> CACHE; |
| |
| private FileArchiverNotifierFactoryImpl() { |
| CACHE = new ConcurrentHashMap<>(); |
| } |
| |
| public static FileArchiverNotifierFactory getInstance() { |
| return CURRENT_INSTANCE; |
| } |
| |
| @VisibleForTesting |
| static void setInstance(FileArchiverNotifierFactory inst) { |
| CURRENT_INSTANCE = Objects.requireNonNull(inst); |
| } |
| |
| @VisibleForTesting |
| static void reset() { |
| CURRENT_INSTANCE = DEFAULT_INSTANCE; |
| } |
| |
| /** |
| * Returns the {@link FileArchiverNotifier} instance for the given {@link TableName}. |
| * |
| * @param tn The table to obtain a notifier for |
| * @return The notifier for the given {@code tablename}. |
| */ |
| public FileArchiverNotifier get(Connection conn, Configuration conf, FileSystem fs, |
| TableName tn) { |
| // Ensure that only one instance is exposed to callers |
| return CACHE.computeIfAbsent(tn, key -> new FileArchiverNotifierImpl(conn, conf, fs, key)); |
| } |
| |
| public int getCacheSize() { |
| return CACHE.size(); |
| } |
| |
| static class CacheKey { |
| final Connection conn; |
| final Configuration conf; |
| final FileSystem fs; |
| final TableName tn; |
| |
| CacheKey(Connection conn, Configuration conf, FileSystem fs, TableName tn) { |
| this.conn = conn; |
| this.conf = conf; |
| this.fs = fs; |
| this.tn = tn; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (!(o instanceof CacheKey)) { |
| return false; |
| } |
| CacheKey other = (CacheKey) o; |
| // TableName should be the only thing differing.. |
| return tn.equals(other.tn) && conn.equals(other.conn) && conf.equals(other.conf) |
| && fs.equals(other.fs); |
| } |
| |
| @Override |
| public int hashCode() { |
| return new HashCodeBuilder().append(conn).append(conf).append(fs).append(tn).toHashCode(); |
| } |
| |
| @Override |
| public String toString() { |
| return "CacheKey[TableName=" + tn + "]"; |
| } |
| } |
| } |