bharathv commented on a change in pull request #1020: HBASE-23653 Expose content of meta table in web ui URL: https://github.com/apache/hbase/pull/1020#discussion_r366111041
########## File path: hbase-server/src/main/java/org/apache/hadoop/hbase/master/webapp/RegionReplicaInfo.java ########## @@ -0,0 +1,143 @@ +/* + * 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.webapp; + +import java.util.Collections; +import java.util.List; +import java.util.stream.Collectors; +import java.util.stream.StreamSupport; +import org.apache.commons.lang3.builder.EqualsBuilder; +import org.apache.commons.lang3.builder.HashCodeBuilder; +import org.apache.commons.lang3.builder.ToStringBuilder; +import org.apache.commons.lang3.builder.ToStringStyle; +import org.apache.hadoop.hbase.HRegionLocation; +import org.apache.hadoop.hbase.MetaTableAccessor; +import org.apache.hadoop.hbase.RegionLocations; +import org.apache.hadoop.hbase.ServerName; +import org.apache.hadoop.hbase.client.RegionInfo; +import org.apache.hadoop.hbase.client.Result; +import org.apache.hadoop.hbase.master.RegionState; +import org.apache.hadoop.hbase.master.assignment.RegionStateStore; +import org.apache.hadoop.hbase.util.Bytes; +import org.apache.yetus.audience.InterfaceAudience; + +/** + * A POJO that consolidates the information about a single region replica that's stored in meta. + */ +@InterfaceAudience.Private +public final class RegionReplicaInfo { + private final byte[] row; + private final RegionInfo regionInfo; + private final RegionState.State regionState; + private final ServerName serverName; + + private RegionReplicaInfo(final Result result, final HRegionLocation location) { + this.row = result != null ? result.getRow() : null; + this.regionInfo = location != null ? location.getRegion() : null; + this.regionState = (result != null && regionInfo != null) + ? RegionStateStore.getRegionState(result, regionInfo) + : null; + this.serverName = location != null ? location.getServerName() : null; + } + + public static List<RegionReplicaInfo> from(final Result result) { + if (result == null) { + return Collections.singletonList(null); + } + + final RegionLocations locations = MetaTableAccessor.getRegionLocations(result); + if (locations == null) { + return Collections.singletonList(null); + } + + return StreamSupport.stream(locations.spliterator(), false) + .map(location -> new RegionReplicaInfo(result, location)) + .collect(Collectors.toList()); + } + + public byte[] getRow() { + return row; + } + + public RegionInfo getRegionInfo() { + return regionInfo; + } + + public byte[] getRegionName() { Review comment: Thanks for the clean up.. this is what I had in mind. ---------------------------------------------------------------- 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: us...@infra.apache.org With regards, Apache Git Services
