sharmaar12 commented on code in PR #7661: URL: https://github.com/apache/hbase/pull/7661#discussion_r2768501360
########## hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/BulkLoadReadOnlyController.java: ########## @@ -0,0 +1,89 @@ +/* + * 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.security.access; + +import java.io.IOException; +import java.util.Optional; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.hbase.CoprocessorEnvironment; +import org.apache.hadoop.hbase.DoNotRetryIOException; +import org.apache.hadoop.hbase.HBaseInterfaceAudience; +import org.apache.hadoop.hbase.HConstants; +import org.apache.hadoop.hbase.conf.ConfigurationObserver; +import org.apache.hadoop.hbase.coprocessor.BulkLoadObserver; +import org.apache.hadoop.hbase.coprocessor.CoreCoprocessor; +import org.apache.hadoop.hbase.coprocessor.ObserverContext; +import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor; +import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment; +import org.apache.yetus.audience.InterfaceAudience; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +@CoreCoprocessor [email protected](HBaseInterfaceAudience.CONFIG) +public class BulkLoadReadOnlyController + implements BulkLoadObserver, RegionCoprocessor, ConfigurationObserver { + + private static final Logger LOG = LoggerFactory.getLogger(BulkLoadReadOnlyController.class); + private volatile boolean globalReadOnlyEnabled; + + private void internalReadOnlyGuard() throws DoNotRetryIOException { Review Comment: Thanks for the suggestion. I will create the `AbstractReadOnlyController` class which implements ConfigurationObserver so that we can move `start()`, `stop()`, `OnConfigurationChange()` and `internalReadOnlyGuard()`. ########## hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/BulkLoadReadOnlyController.java: ########## @@ -0,0 +1,89 @@ +/* + * 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.security.access; + +import java.io.IOException; +import java.util.Optional; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.hbase.CoprocessorEnvironment; +import org.apache.hadoop.hbase.DoNotRetryIOException; +import org.apache.hadoop.hbase.HBaseInterfaceAudience; +import org.apache.hadoop.hbase.HConstants; +import org.apache.hadoop.hbase.conf.ConfigurationObserver; +import org.apache.hadoop.hbase.coprocessor.BulkLoadObserver; +import org.apache.hadoop.hbase.coprocessor.CoreCoprocessor; +import org.apache.hadoop.hbase.coprocessor.ObserverContext; +import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor; +import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment; +import org.apache.yetus.audience.InterfaceAudience; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +@CoreCoprocessor [email protected](HBaseInterfaceAudience.CONFIG) +public class BulkLoadReadOnlyController + implements BulkLoadObserver, RegionCoprocessor, ConfigurationObserver { + + private static final Logger LOG = LoggerFactory.getLogger(BulkLoadReadOnlyController.class); + private volatile boolean globalReadOnlyEnabled; + + private void internalReadOnlyGuard() throws DoNotRetryIOException { Review Comment: Done. ########## hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/MasterReadOnlyController.java: ########## @@ -128,311 +87,54 @@ public void start(CoprocessorEnvironment env) throws IOException { public void stop(CoprocessorEnvironment env) { } - /* ---- RegionObserver Overrides ---- */ - @Override - public Optional<RegionObserver> getRegionObserver() { - return Optional.of(this); - } - - @Override - public void preFlushScannerOpen(ObserverContext<? extends RegionCoprocessorEnvironment> c, - Store store, ScanOptions options, FlushLifeCycleTracker tracker) throws IOException { - if (!isOnMeta(c)) { - internalReadOnlyGuard(); - } - RegionObserver.super.preFlushScannerOpen(c, store, options, tracker); - } - - @Override - public void preFlush(final ObserverContext<? extends RegionCoprocessorEnvironment> c, - FlushLifeCycleTracker tracker) throws IOException { - if (!isOnMeta(c)) { - internalReadOnlyGuard(); - } - RegionObserver.super.preFlush(c, tracker); - } - - @Override - public InternalScanner preFlush(ObserverContext<? extends RegionCoprocessorEnvironment> c, - Store store, InternalScanner scanner, FlushLifeCycleTracker tracker) throws IOException { - if (!isOnMeta(c)) { - internalReadOnlyGuard(); - } - return RegionObserver.super.preFlush(c, store, scanner, tracker); - } - - @Override - public void preMemStoreCompaction(ObserverContext<? extends RegionCoprocessorEnvironment> c, - Store store) throws IOException { - internalReadOnlyGuard(); - RegionObserver.super.preMemStoreCompaction(c, store); - } - - @Override - public void preMemStoreCompactionCompactScannerOpen( - ObserverContext<? extends RegionCoprocessorEnvironment> c, Store store, ScanOptions options) - throws IOException { - internalReadOnlyGuard(); - RegionObserver.super.preMemStoreCompactionCompactScannerOpen(c, store, options); - } - - @Override - public InternalScanner preMemStoreCompactionCompact( - ObserverContext<? extends RegionCoprocessorEnvironment> c, Store store, InternalScanner scanner) - throws IOException { - internalReadOnlyGuard(); - return RegionObserver.super.preMemStoreCompactionCompact(c, store, scanner); - } - - @Override - public void preCompactSelection(ObserverContext<? extends RegionCoprocessorEnvironment> c, - Store store, List<? extends StoreFile> candidates, CompactionLifeCycleTracker tracker) - throws IOException { - if (!isOnMeta(c)) { - internalReadOnlyGuard(); - } - RegionObserver.super.preCompactSelection(c, store, candidates, tracker); - } - - @Override - public void preCompactScannerOpen(ObserverContext<? extends RegionCoprocessorEnvironment> c, - Store store, ScanType scanType, ScanOptions options, CompactionLifeCycleTracker tracker, - CompactionRequest request) throws IOException { - if (!isOnMeta(c)) { - internalReadOnlyGuard(); - } - RegionObserver.super.preCompactScannerOpen(c, store, scanType, options, tracker, request); - } - - @Override - public InternalScanner preCompact(ObserverContext<? extends RegionCoprocessorEnvironment> c, - Store store, InternalScanner scanner, ScanType scanType, CompactionLifeCycleTracker tracker, - CompactionRequest request) throws IOException { - if (!isOnMeta(c)) { - internalReadOnlyGuard(); - } - return RegionObserver.super.preCompact(c, store, scanner, scanType, tracker, request); - } - - @Override - public void prePut(ObserverContext<? extends RegionCoprocessorEnvironment> c, Put put, - WALEdit edit, Durability durability) throws IOException { - if (!isOnMeta(c)) { - internalReadOnlyGuard(); - } - RegionObserver.super.prePut(c, put, edit, durability); - } - - @Override - public void prePut(ObserverContext<? extends RegionCoprocessorEnvironment> c, Put put, - WALEdit edit) throws IOException { - if (!isOnMeta(c)) { - internalReadOnlyGuard(); - } - RegionObserver.super.prePut(c, put, edit); - } - - @Override - public void preDelete(ObserverContext<? extends RegionCoprocessorEnvironment> c, Delete delete, - WALEdit edit, Durability durability) throws IOException { - if (!isOnMeta(c)) { - internalReadOnlyGuard(); - } - RegionObserver.super.preDelete(c, delete, edit, durability); - } - - @Override - public void preDelete(ObserverContext<? extends RegionCoprocessorEnvironment> c, Delete delete, - WALEdit edit) throws IOException { - if (!isOnMeta(c)) { - internalReadOnlyGuard(); - } - RegionObserver.super.preDelete(c, delete, edit); - } - - @Override - public void preBatchMutate(ObserverContext<? extends RegionCoprocessorEnvironment> c, - MiniBatchOperationInProgress<Mutation> miniBatchOp) throws IOException { - if (!isOnMeta(c)) { - internalReadOnlyGuard(); - } - RegionObserver.super.preBatchMutate(c, miniBatchOp); - } - - @Override - public boolean preCheckAndPut(ObserverContext<? extends RegionCoprocessorEnvironment> c, - byte[] row, byte[] family, byte[] qualifier, CompareOperator op, ByteArrayComparable comparator, - Put put, boolean result) throws IOException { - if (!isOnMeta(c)) { - internalReadOnlyGuard(); - } - return RegionObserver.super.preCheckAndPut(c, row, family, qualifier, op, comparator, put, - result); - } - - @Override - public boolean preCheckAndPut(ObserverContext<? extends RegionCoprocessorEnvironment> c, - byte[] row, Filter filter, Put put, boolean result) throws IOException { - if (!isOnMeta(c)) { - internalReadOnlyGuard(); - } - return RegionObserver.super.preCheckAndPut(c, row, filter, put, result); - } - - @Override - public boolean preCheckAndPutAfterRowLock( - ObserverContext<? extends RegionCoprocessorEnvironment> c, byte[] row, byte[] family, - byte[] qualifier, CompareOperator op, ByteArrayComparable comparator, Put put, boolean result) - throws IOException { - if (!isOnMeta(c)) { - internalReadOnlyGuard(); - } - return RegionObserver.super.preCheckAndPutAfterRowLock(c, row, family, qualifier, op, - comparator, put, result); - } - - @Override - public boolean preCheckAndPutAfterRowLock( - ObserverContext<? extends RegionCoprocessorEnvironment> c, byte[] row, Filter filter, Put put, - boolean result) throws IOException { - if (!isOnMeta(c)) { - internalReadOnlyGuard(); - } - return RegionObserver.super.preCheckAndPutAfterRowLock(c, row, filter, put, result); - } - @Override - public boolean preCheckAndDelete(ObserverContext<? extends RegionCoprocessorEnvironment> c, - byte[] row, byte[] family, byte[] qualifier, CompareOperator op, ByteArrayComparable comparator, - Delete delete, boolean result) throws IOException { - if (!isOnMeta(c)) { - internalReadOnlyGuard(); - } - return RegionObserver.super.preCheckAndDelete(c, row, family, qualifier, op, comparator, delete, - result); - } - - @Override - public boolean preCheckAndDelete(ObserverContext<? extends RegionCoprocessorEnvironment> c, - byte[] row, Filter filter, Delete delete, boolean result) throws IOException { - if (!isOnMeta(c)) { - internalReadOnlyGuard(); - } - return RegionObserver.super.preCheckAndDelete(c, row, filter, delete, result); - } - - @Override - public boolean preCheckAndDeleteAfterRowLock( - ObserverContext<? extends RegionCoprocessorEnvironment> c, byte[] row, byte[] family, - byte[] qualifier, CompareOperator op, ByteArrayComparable comparator, Delete delete, - boolean result) throws IOException { - if (!isOnMeta(c)) { - internalReadOnlyGuard(); - } - return RegionObserver.super.preCheckAndDeleteAfterRowLock(c, row, family, qualifier, op, - comparator, delete, result); - } - - @Override - public boolean preCheckAndDeleteAfterRowLock( - ObserverContext<? extends RegionCoprocessorEnvironment> c, byte[] row, Filter filter, - Delete delete, boolean result) throws IOException { - if (!isOnMeta(c)) { - internalReadOnlyGuard(); + public void onConfigurationChange(Configuration conf) { + boolean maybeUpdatedConfValue = conf.getBoolean(HConstants.HBASE_GLOBAL_READONLY_ENABLED_KEY, + HConstants.HBASE_GLOBAL_READONLY_ENABLED_DEFAULT); + if (this.globalReadOnlyEnabled != maybeUpdatedConfValue) { + if (this.masterServices != null) { + manageActiveClusterIdFile(maybeUpdatedConfValue); + } else { + LOG.debug("Global R/O flag changed, but not running on master"); + } + this.globalReadOnlyEnabled = maybeUpdatedConfValue; + LOG.info("Config {} has been dynamically changed to {}.", + HConstants.HBASE_GLOBAL_READONLY_ENABLED_KEY, this.globalReadOnlyEnabled); } - return RegionObserver.super.preCheckAndDeleteAfterRowLock(c, row, filter, delete, result); - } - - @Override - public CheckAndMutateResult preCheckAndMutate( - ObserverContext<? extends RegionCoprocessorEnvironment> c, CheckAndMutate checkAndMutate, - CheckAndMutateResult result) throws IOException { - internalReadOnlyGuard(); - return RegionObserver.super.preCheckAndMutate(c, checkAndMutate, result); - } - - @Override - public CheckAndMutateResult preCheckAndMutateAfterRowLock( - ObserverContext<? extends RegionCoprocessorEnvironment> c, CheckAndMutate checkAndMutate, - CheckAndMutateResult result) throws IOException { - internalReadOnlyGuard(); - return RegionObserver.super.preCheckAndMutateAfterRowLock(c, checkAndMutate, result); - } - - @Override - public Result preAppend(ObserverContext<? extends RegionCoprocessorEnvironment> c, Append append) - throws IOException { - internalReadOnlyGuard(); - return RegionObserver.super.preAppend(c, append); } - @Override - public Result preAppend(ObserverContext<? extends RegionCoprocessorEnvironment> c, Append append, - WALEdit edit) throws IOException { - internalReadOnlyGuard(); - return RegionObserver.super.preAppend(c, append, edit); - } - - @Override - public Result preAppendAfterRowLock(ObserverContext<? extends RegionCoprocessorEnvironment> c, - Append append) throws IOException { - internalReadOnlyGuard(); - return RegionObserver.super.preAppendAfterRowLock(c, append); - } - - @Override - public Result preIncrement(ObserverContext<? extends RegionCoprocessorEnvironment> c, - Increment increment) throws IOException { - internalReadOnlyGuard(); - return RegionObserver.super.preIncrement(c, increment); - } - - @Override - public Result preIncrement(ObserverContext<? extends RegionCoprocessorEnvironment> c, - Increment increment, WALEdit edit) throws IOException { - internalReadOnlyGuard(); - return RegionObserver.super.preIncrement(c, increment, edit); - } - - @Override - public Result preIncrementAfterRowLock(ObserverContext<? extends RegionCoprocessorEnvironment> c, - Increment increment) throws IOException { - internalReadOnlyGuard(); - return RegionObserver.super.preIncrementAfterRowLock(c, increment); - } - - @Override - public void preReplayWALs(ObserverContext<? extends RegionCoprocessorEnvironment> ctx, - RegionInfo info, Path edits) throws IOException { - internalReadOnlyGuard(); - RegionObserver.super.preReplayWALs(ctx, info, edits); - } - - @Override - public void preBulkLoadHFile(ObserverContext<? extends RegionCoprocessorEnvironment> ctx, - List<Pair<byte[], String>> familyPaths) throws IOException { - internalReadOnlyGuard(); - RegionObserver.super.preBulkLoadHFile(ctx, familyPaths); - } - - @Override - public void preCommitStoreFile(ObserverContext<? extends RegionCoprocessorEnvironment> ctx, - byte[] family, List<Pair<Path, Path>> pairs) throws IOException { - internalReadOnlyGuard(); - RegionObserver.super.preCommitStoreFile(ctx, family, pairs); - } + private void manageActiveClusterIdFile(boolean newValue) { Review Comment: Done. ########## hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/RegionReadOnlyController.java: ########## @@ -0,0 +1,407 @@ +/* + * 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.security.access; + +import java.io.IOException; +import java.util.List; +import java.util.Optional; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.fs.Path; +import org.apache.hadoop.hbase.CompareOperator; +import org.apache.hadoop.hbase.CoprocessorEnvironment; +import org.apache.hadoop.hbase.DoNotRetryIOException; +import org.apache.hadoop.hbase.HBaseInterfaceAudience; +import org.apache.hadoop.hbase.HConstants; +import org.apache.hadoop.hbase.TableName; +import org.apache.hadoop.hbase.client.Append; +import org.apache.hadoop.hbase.client.CheckAndMutate; +import org.apache.hadoop.hbase.client.CheckAndMutateResult; +import org.apache.hadoop.hbase.client.Delete; +import org.apache.hadoop.hbase.client.Durability; +import org.apache.hadoop.hbase.client.Increment; +import org.apache.hadoop.hbase.client.Mutation; +import org.apache.hadoop.hbase.client.Put; +import org.apache.hadoop.hbase.client.RegionInfo; +import org.apache.hadoop.hbase.client.Result; +import org.apache.hadoop.hbase.conf.ConfigurationObserver; +import org.apache.hadoop.hbase.coprocessor.CoreCoprocessor; +import org.apache.hadoop.hbase.coprocessor.ObserverContext; +import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor; +import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment; +import org.apache.hadoop.hbase.coprocessor.RegionObserver; +import org.apache.hadoop.hbase.filter.ByteArrayComparable; +import org.apache.hadoop.hbase.filter.Filter; +import org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker; +import org.apache.hadoop.hbase.regionserver.InternalScanner; +import org.apache.hadoop.hbase.regionserver.MiniBatchOperationInProgress; +import org.apache.hadoop.hbase.regionserver.ScanOptions; +import org.apache.hadoop.hbase.regionserver.ScanType; +import org.apache.hadoop.hbase.regionserver.Store; +import org.apache.hadoop.hbase.regionserver.StoreFile; +import org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker; +import org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest; +import org.apache.hadoop.hbase.util.Pair; +import org.apache.hadoop.hbase.wal.WALEdit; +import org.apache.hadoop.hbase.wal.WALKey; +import org.apache.yetus.audience.InterfaceAudience; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +@CoreCoprocessor [email protected](HBaseInterfaceAudience.CONFIG) +public class RegionReadOnlyController + implements RegionCoprocessor, RegionObserver, ConfigurationObserver { + + private static final Logger LOG = LoggerFactory.getLogger(RegionReadOnlyController.class); + private volatile boolean globalReadOnlyEnabled; + + private void internalReadOnlyGuard() throws DoNotRetryIOException { + if (this.globalReadOnlyEnabled) { + throw new DoNotRetryIOException("Operation not allowed in Read-Only Mode"); + } + } + + private boolean isOnMeta(final ObserverContext<? extends RegionCoprocessorEnvironment> c) { + return TableName.isMetaTableName(c.getEnvironment().getRegionInfo().getTable()); + } + + @Override + public void start(CoprocessorEnvironment env) throws IOException { + this.globalReadOnlyEnabled = + env.getConfiguration().getBoolean(HConstants.HBASE_GLOBAL_READONLY_ENABLED_KEY, + HConstants.HBASE_GLOBAL_READONLY_ENABLED_DEFAULT); + } + + @Override + public void stop(CoprocessorEnvironment env) { + } + + @Override + public Optional<RegionObserver> getRegionObserver() { + return Optional.of(this); + } + + @Override + public void onConfigurationChange(Configuration conf) { + boolean maybeUpdatedConfValue = conf.getBoolean(HConstants.HBASE_GLOBAL_READONLY_ENABLED_KEY, + HConstants.HBASE_GLOBAL_READONLY_ENABLED_DEFAULT); + if (this.globalReadOnlyEnabled != maybeUpdatedConfValue) { Review Comment: Agreed. Will update the code accordingly. ########## hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/RegionReadOnlyController.java: ########## @@ -0,0 +1,407 @@ +/* + * 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.security.access; + +import java.io.IOException; +import java.util.List; +import java.util.Optional; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.fs.Path; +import org.apache.hadoop.hbase.CompareOperator; +import org.apache.hadoop.hbase.CoprocessorEnvironment; +import org.apache.hadoop.hbase.DoNotRetryIOException; +import org.apache.hadoop.hbase.HBaseInterfaceAudience; +import org.apache.hadoop.hbase.HConstants; +import org.apache.hadoop.hbase.TableName; +import org.apache.hadoop.hbase.client.Append; +import org.apache.hadoop.hbase.client.CheckAndMutate; +import org.apache.hadoop.hbase.client.CheckAndMutateResult; +import org.apache.hadoop.hbase.client.Delete; +import org.apache.hadoop.hbase.client.Durability; +import org.apache.hadoop.hbase.client.Increment; +import org.apache.hadoop.hbase.client.Mutation; +import org.apache.hadoop.hbase.client.Put; +import org.apache.hadoop.hbase.client.RegionInfo; +import org.apache.hadoop.hbase.client.Result; +import org.apache.hadoop.hbase.conf.ConfigurationObserver; +import org.apache.hadoop.hbase.coprocessor.CoreCoprocessor; +import org.apache.hadoop.hbase.coprocessor.ObserverContext; +import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor; +import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment; +import org.apache.hadoop.hbase.coprocessor.RegionObserver; +import org.apache.hadoop.hbase.filter.ByteArrayComparable; +import org.apache.hadoop.hbase.filter.Filter; +import org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker; +import org.apache.hadoop.hbase.regionserver.InternalScanner; +import org.apache.hadoop.hbase.regionserver.MiniBatchOperationInProgress; +import org.apache.hadoop.hbase.regionserver.ScanOptions; +import org.apache.hadoop.hbase.regionserver.ScanType; +import org.apache.hadoop.hbase.regionserver.Store; +import org.apache.hadoop.hbase.regionserver.StoreFile; +import org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker; +import org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest; +import org.apache.hadoop.hbase.util.Pair; +import org.apache.hadoop.hbase.wal.WALEdit; +import org.apache.hadoop.hbase.wal.WALKey; +import org.apache.yetus.audience.InterfaceAudience; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +@CoreCoprocessor [email protected](HBaseInterfaceAudience.CONFIG) +public class RegionReadOnlyController + implements RegionCoprocessor, RegionObserver, ConfigurationObserver { + + private static final Logger LOG = LoggerFactory.getLogger(RegionReadOnlyController.class); + private volatile boolean globalReadOnlyEnabled; + + private void internalReadOnlyGuard() throws DoNotRetryIOException { + if (this.globalReadOnlyEnabled) { + throw new DoNotRetryIOException("Operation not allowed in Read-Only Mode"); + } + } + + private boolean isOnMeta(final ObserverContext<? extends RegionCoprocessorEnvironment> c) { + return TableName.isMetaTableName(c.getEnvironment().getRegionInfo().getTable()); + } + + @Override + public void start(CoprocessorEnvironment env) throws IOException { + this.globalReadOnlyEnabled = + env.getConfiguration().getBoolean(HConstants.HBASE_GLOBAL_READONLY_ENABLED_KEY, + HConstants.HBASE_GLOBAL_READONLY_ENABLED_DEFAULT); + } + + @Override + public void stop(CoprocessorEnvironment env) { + } + + @Override + public Optional<RegionObserver> getRegionObserver() { + return Optional.of(this); + } + + @Override + public void onConfigurationChange(Configuration conf) { + boolean maybeUpdatedConfValue = conf.getBoolean(HConstants.HBASE_GLOBAL_READONLY_ENABLED_KEY, + HConstants.HBASE_GLOBAL_READONLY_ENABLED_DEFAULT); + if (this.globalReadOnlyEnabled != maybeUpdatedConfValue) { Review Comment: Done. -- This is an automated message from the Apache Git Service. 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