nyl3532016 commented on a change in pull request #3202: URL: https://github.com/apache/hbase/pull/3202#discussion_r636013340
########## File path: hbase-server/src/main/java/org/apache/hadoop/hbase/master/compaction/CompactionOffloadManager.java ########## @@ -0,0 +1,134 @@ +/** + * 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.master.compaction; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.Collections; +import java.util.List; +import java.util.Map; +import java.util.concurrent.TimeUnit; + +import org.apache.hadoop.hbase.HConstants; +import org.apache.hadoop.hbase.ServerMetrics; +import org.apache.hadoop.hbase.ServerName; +import org.apache.hadoop.hbase.master.MasterServices; +import org.apache.hadoop.hbase.master.procedure.ProcedurePrepareLatch; +import org.apache.hadoop.hbase.master.procedure.SwitchCompactionOffloadProcedure; +import org.apache.hadoop.hbase.regionserver.CompactionOffloadSwitchStorage; +import org.apache.yetus.audience.InterfaceAudience; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import org.apache.hbase.thirdparty.com.google.common.cache.Cache; +import org.apache.hbase.thirdparty.com.google.common.cache.CacheBuilder; + +import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos.IsCompactionOffloadEnabledRequest; +import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos.IsCompactionOffloadEnabledResponse; +import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos.SwitchCompactionOffloadRequest; +import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos.SwitchCompactionOffloadResponse; + [email protected] +public class CompactionOffloadManager { + private final MasterServices masterServices; + /** Map of registered servers to their current load */ + private final Cache<ServerName, ServerMetrics> onlineServers; + private CompactionOffloadSwitchStorage compactionOffloadSwitchStorage; + private static final Logger LOG = + LoggerFactory.getLogger(CompactionOffloadManager.class.getName()); + + public CompactionOffloadManager(final MasterServices master) { + this.masterServices = master; + int compactionServerMsgInterval = + master.getConfiguration().getInt(HConstants.COMPACTION_SERVER_MSG_INTERVAL, 3 * 1000); + int compactionServerExpiredFactor = + master.getConfiguration().getInt("hbase.compaction.server.expired.factor", 2); + this.onlineServers = CacheBuilder.newBuilder().expireAfterWrite( + compactionServerMsgInterval * compactionServerExpiredFactor, TimeUnit.MILLISECONDS).build(); + this.compactionOffloadSwitchStorage = new CompactionOffloadSwitchStorage( + masterServices.getZooKeeper(), masterServices.getConfiguration()); + } + + public void compactionServerReport(ServerName sn, ServerMetrics sl) { + this.onlineServers.put(sn, sl); + } + + /** + * @return A copy of the internal list of online servers. + */ + public List<ServerName> getOnlineServersList() { + return new ArrayList<>(this.onlineServers.asMap().keySet()); + } + + /** + * @return Read-only map of servers to serverinfo + */ + public Map<ServerName, ServerMetrics> getOnlineServers() { + return Collections.unmodifiableMap(this.onlineServers.asMap()); + } + + /** + * May return "0.0.0" when server is not online + */ + public String getVersion(ServerName serverName) { + ServerMetrics serverMetrics = onlineServers.asMap().get(serverName); + return serverMetrics != null ? serverMetrics.getVersion() : "0.0.0"; + } + + public int getInfoPort(ServerName serverName) { + ServerMetrics serverMetrics = onlineServers.asMap().get(serverName); + return serverMetrics != null ? serverMetrics.getInfoServerPort() : 0; + } + + public IsCompactionOffloadEnabledResponse + isCompactionOffloadEnabled(IsCompactionOffloadEnabledRequest request) throws IOException { + masterServices.getMasterCoprocessorHost().preIsCompactionOffloadEnabled(); + boolean enabled = compactionOffloadSwitchStorage.isCompactionOffloadEnabled(); + IsCompactionOffloadEnabledResponse response = IsCompactionOffloadEnabledResponse.newBuilder() + .setCompactionOffloadEnabled(enabled).build(); + masterServices.getMasterCoprocessorHost().postIsCompactionOffloadEnabled(enabled); + return response; + } + + public SwitchCompactionOffloadResponse + switchCompactionOffload(SwitchCompactionOffloadRequest request) throws IOException { + boolean compactionOffloadEnabled = request.getCompactionOffloadEnabled(); + masterServices.getMasterCoprocessorHost().preSwitchCompactionOffload(compactionOffloadEnabled); + boolean oldCompactionOffloadEnable = + compactionOffloadSwitchStorage.isCompactionOffloadEnabled(); + if (compactionOffloadEnabled != oldCompactionOffloadEnable) { Review comment: Yes, double check to avoid duplicated procedure -- This is an automated message from the Apache Git Service. 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