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Server functionality for HBase
/*
* 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.io.IOException;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import org.apache.yetus.audience.InterfaceAudience;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.DoNotRetryIOException;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Durability;
import org.apache.hadoop.hbase.client.Mutation;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.protobuf.generated.MultiRowMutationProtos.MultiRowMutationProcessorRequest;
import org.apache.hadoop.hbase.protobuf.generated.MultiRowMutationProtos.MultiRowMutationProcessorResponse;
import org.apache.hadoop.hbase.wal.WALEdit;
import org.apache.hadoop.hbase.util.Bytes;
/**
* A MultiRowProcessor that performs multiple puts and deletes.
*/
@InterfaceAudience.Private
class MultiRowMutationProcessor extends BaseRowProcessor {
Collection rowsToLock;
Collection mutations;
MiniBatchOperationInProgress miniBatch;
MultiRowMutationProcessor(Collection mutations,
Collection rowsToLock) {
this.rowsToLock = rowsToLock;
this.mutations = mutations;
}
@Override
public Collection getRowsToLock() {
return rowsToLock;
}
@Override
public boolean readOnly() {
return false;
}
@Override
public MultiRowMutationProcessorResponse getResult() {
return MultiRowMutationProcessorResponse.getDefaultInstance();
}
@Override
public void process(long now,
HRegion region,
List mutationsToApply,
WALEdit walEdit) throws IOException {
byte[] byteNow = Bytes.toBytes(now);
// Check mutations
for (Mutation m : this.mutations) {
if (m instanceof Put) {
Map> familyMap = m.getFamilyCellMap();
region.checkFamilies(familyMap.keySet());
region.checkTimestamps(familyMap, now);
region.updateCellTimestamps(familyMap.values(), byteNow);
} else if (m instanceof Delete) {
Delete d = (Delete) m;
region.prepareDelete(d);
region.prepareDeleteTimestamps(d, d.getFamilyCellMap(), byteNow);
} else {
throw new DoNotRetryIOException("Action must be Put or Delete. But was: "
+ m.getClass().getName());
}
mutationsToApply.add(m);
}
// Apply edits to a single WALEdit
for (Mutation m : mutations) {
for (List| cells : m.getFamilyCellMap().values()) {
boolean writeToWAL = m.getDurability() != Durability.SKIP_WAL;
for (Cell cell : cells) {
if (writeToWAL) walEdit.add(cell);
}
}
}
}
@Override
public void preProcess(HRegion region, WALEdit walEdit) throws IOException {
RegionCoprocessorHost coprocessorHost = region.getCoprocessorHost();
if (coprocessorHost != null) {
for (Mutation m : mutations) {
if (m instanceof Put) {
if (coprocessorHost.prePut((Put) m, walEdit, m.getDurability())) {
// by pass everything
// Is this right? Bypass everything and not just this individual put?
// This class is going away in hbase2 so lets not sweat it.
return;
}
} else if (m instanceof Delete) {
Delete d = (Delete) m;
region.prepareDelete(d);
if (coprocessorHost.preDelete(d, walEdit, d.getDurability())) {
// by pass everything
// Is this right? Bypass everything and not just this individual put?
// This class is going away in hbase2 so lets not sweat it.
return;
}
}
}
}
}
@Override
public void preBatchMutate(HRegion region, WALEdit walEdit) throws IOException {
// TODO we should return back the status of this hook run to HRegion so that those Mutations
// with OperationStatus as SUCCESS or FAILURE should not get applied to memstore.
RegionCoprocessorHost coprocessorHost = region.getCoprocessorHost();
OperationStatus[] opStatus = new OperationStatus[mutations.size()];
Arrays.fill(opStatus, OperationStatus.NOT_RUN);
WALEdit[] walEditsFromCP = new WALEdit[mutations.size()];
if (coprocessorHost != null) {
miniBatch = new MiniBatchOperationInProgress<>(
mutations.toArray(new Mutation[mutations.size()]), opStatus, walEditsFromCP, 0,
mutations.size());
coprocessorHost.preBatchMutate(miniBatch);
}
// Apply edits to a single WALEdit
for (int i = 0; i < mutations.size(); i++) {
if (opStatus[i] == OperationStatus.NOT_RUN) {
// Other OperationStatusCode means that Mutation is already succeeded or failed in CP hook
// itself. No need to apply again to region
if (walEditsFromCP[i] != null) {
// Add the WALEdit created by CP hook
for (Cell walCell : walEditsFromCP[i].getCells()) {
walEdit.add(walCell);
}
}
}
}
}
@Override
public void postBatchMutate(HRegion region) throws IOException {
RegionCoprocessorHost coprocessorHost = region.getCoprocessorHost();
if (coprocessorHost != null) {
assert miniBatch != null;
// Use the same miniBatch state used to call the preBatchMutate()
coprocessorHost.postBatchMutate(miniBatch);
}
}
@Override
public void postProcess(HRegion region, WALEdit walEdit, boolean success) throws IOException {
RegionCoprocessorHost coprocessorHost = region.getCoprocessorHost();
if (coprocessorHost != null) {
for (Mutation m : mutations) {
if (m instanceof Put) {
coprocessorHost.postPut((Put) m, walEdit, m.getDurability());
} else if (m instanceof Delete) {
coprocessorHost.postDelete((Delete) m, walEdit, m.getDurability());
}
}
// At the end call the CP hook postBatchMutateIndispensably
if (miniBatch != null) {
// Directly calling this hook, with out calling pre/postBatchMutate() when Processor do a
// read only process. Then no need to call this batch based CP hook also.
coprocessorHost.postBatchMutateIndispensably(miniBatch, success);
}
}
}
@Override
public MultiRowMutationProcessorRequest getRequestData() {
return MultiRowMutationProcessorRequest.getDefaultInstance();
}
@Override
public void initialize(MultiRowMutationProcessorRequest msg) {
//nothing
}
@Override
public Durability useDurability() {
// return true when at least one mutation requested a WAL flush (default)
Durability durability = Durability.USE_DEFAULT;
for (Mutation m : mutations) {
if (m.getDurability().ordinal() > durability.ordinal()) {
durability = m.getDurability();
}
}
return durability;
}
}
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