huaxiangsun commented on a change in pull request #2522: URL: https://github.com/apache/hbase/pull/2522#discussion_r502693297
########## File path: hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/CatalogReplicaReplicationEndpoint.java ########## @@ -0,0 +1,495 @@ +/** + * 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.replication.regionserver; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.Iterator; +import java.util.List; +import java.util.Map; +import java.util.TreeMap; +import java.util.UUID; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.ExecutionException; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.LinkedBlockingQueue; +import java.util.concurrent.TimeUnit; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.hbase.CatalogFamilyFormat; +import org.apache.hadoop.hbase.HConstants; +import org.apache.hadoop.hbase.HRegionLocation; +import org.apache.hadoop.hbase.NotServingRegionException; +import org.apache.hadoop.hbase.TableName; +import org.apache.hadoop.hbase.client.AsyncClusterConnection; +import org.apache.hadoop.hbase.client.AsyncTableRegionLocator; +import org.apache.hadoop.hbase.client.RegionInfo; +import org.apache.hadoop.hbase.client.RegionInfoBuilder; +import org.apache.hadoop.hbase.exceptions.RegionMovedException; +import org.apache.hadoop.hbase.regionserver.HRegionServer; +import org.apache.hadoop.hbase.regionserver.Region; +import org.apache.hadoop.hbase.replication.BaseReplicationEndpoint; +import org.apache.hadoop.hbase.replication.WALEntryFilter; +import org.apache.hadoop.hbase.shaded.protobuf.generated.WALProtos; +import org.apache.hadoop.hbase.util.Bytes; +import org.apache.hadoop.hbase.util.FutureUtils; +import org.apache.hadoop.hbase.wal.WAL.Entry; +import org.apache.hadoop.hbase.wal.WALEdit; +import org.apache.yetus.audience.InterfaceAudience; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * A {@link org.apache.hadoop.hbase.replication.ReplicationEndpoint} endpoint which receives the WAL + * edits from the WAL, and sends the edits to replicas of regions. + * This EndPoint is specially for system tables. It does a few things: + * + * 1. For each replica region, there is a shipper to ship edits for this region. Internally, + * the shipper maintains a in-memory queue, where edits from wal log are queued in this + * in-memory queue. Review comment: Yeah, will work on the improvement later. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
