| /** |
| * |
| * 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.regionserver; |
| |
| import java.security.PrivilegedAction; |
| import org.apache.hadoop.hbase.HConstants; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.client.RegionInfo; |
| import org.apache.hadoop.hbase.client.RegionInfoBuilder; |
| import org.apache.hadoop.hbase.regionserver.RegionServerServices.RegionStateTransitionContext; |
| import org.apache.hadoop.hbase.security.User; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.hbase.thirdparty.com.google.common.base.Preconditions; |
| |
| import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.RegionStateTransition.TransitionCode; |
| |
| /** |
| * Handles processing region splits. Put in a queue, owned by HRegionServer. |
| */ |
| @InterfaceAudience.Private |
| class SplitRequest implements Runnable { |
| private static final Logger LOG = LoggerFactory.getLogger(SplitRequest.class); |
| private final RegionInfo parent; |
| private final byte[] midKey; |
| private final HRegionServer server; |
| private final User user; |
| |
| SplitRequest(Region region, byte[] midKey, HRegionServer hrs, User user) { |
| Preconditions.checkNotNull(hrs); |
| this.parent = region.getRegionInfo(); |
| this.midKey = midKey; |
| this.server = hrs; |
| this.user = user; |
| } |
| |
| @Override |
| public String toString() { |
| return "regionName=" + parent + ", midKey=" + Bytes.toStringBinary(midKey); |
| } |
| |
| private void doSplitting() { |
| server.getMetrics().incrSplitRequest(); |
| if (user != null && user.getUGI() != null) { |
| user.getUGI().doAs((PrivilegedAction<Void>) () -> { |
| requestRegionSplit(); |
| return null; |
| }); |
| } else { |
| requestRegionSplit(); |
| } |
| } |
| |
| private void requestRegionSplit() { |
| final TableName table = parent.getTable(); |
| final RegionInfo hri_a = RegionInfoBuilder.newBuilder(table) |
| .setStartKey(parent.getStartKey()) |
| .setEndKey(midKey) |
| .build(); |
| final RegionInfo hri_b = RegionInfoBuilder.newBuilder(table) |
| .setStartKey(midKey) |
| .setEndKey(parent.getEndKey()) |
| .build(); |
| // Send the split request to the master. the master will do the validation on the split-key. |
| // The parent region will be unassigned and the two new regions will be assigned. |
| // hri_a and hri_b objects may not reflect the regions that will be created, those objects |
| // are created just to pass the information to the reportRegionStateTransition(). |
| if (!server.reportRegionStateTransition(new RegionStateTransitionContext( |
| TransitionCode.READY_TO_SPLIT, HConstants.NO_SEQNUM, -1, parent, hri_a, hri_b))) { |
| LOG.error("Unable to ask master to split " + parent.getRegionNameAsString()); |
| } |
| } |
| |
| @Override |
| public void run() { |
| if (this.server.isStopping() || this.server.isStopped()) { |
| LOG.debug("Skipping split because server is stopping=" + |
| this.server.isStopping() + " or stopped=" + this.server.isStopped()); |
| return; |
| } |
| |
| doSplitting(); |
| } |
| } |