/*
* 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.Collection;
import java.util.List;
import java.util.Map;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.DoNotRetryIOException;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.KeyValueUtil;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Mutation;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Durability;
import org.apache.hadoop.hbase.protobuf.generated.MultiRowMutationProcessorProtos.MultiRowMutationProcessorRequest;
import org.apache.hadoop.hbase.protobuf.generated.MultiRowMutationProcessorProtos.MultiRowMutationProcessorResponse;
import org.apache.hadoop.hbase.regionserver.wal.WALEdit;
import org.apache.hadoop.hbase.util.Bytes;
/**
* A <code>MultiRowProcessor</code> that performs multiple puts and deletes.
*/
class MultiRowMutationProcessor extends BaseRowProcessor<MultiRowMutationProcessorRequest,
MultiRowMutationProcessorResponse> {
Collection<byte[]> rowsToLock;
Collection<Mutation> mutations;
MultiRowMutationProcessor(Collection<Mutation> mutations,
Collection<byte[]> rowsToLock) {
this.rowsToLock = rowsToLock;
this.mutations = mutations;
}
@Override
public Collection<byte[]> 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<KeyValue> mutationKvs,
WALEdit walEdit) throws IOException {
byte[] byteNow = Bytes.toBytes(now);
// Check mutations and apply edits to a single WALEdit
for (Mutation m : mutations) {
if (m instanceof Put) {
Map<byte[], List<Cell>> familyMap = m.getFamilyCellMap();
region.checkFamilies(familyMap.keySet());
region.checkTimestamps(familyMap, now);
region.updateKVTimestamps(familyMap.values(), byteNow);
} else if (m instanceof Delete) {
Delete d = (Delete) m;
region.prepareDelete(d);
region.prepareDeleteTimestamps(d.getFamilyCellMap(), byteNow);
} else {
throw new DoNotRetryIOException(
"Action must be Put or Delete. But was: "
+ m.getClass().getName());
}
for (List<Cell> cells: m.getFamilyCellMap().values()) {
boolean writeToWAL = m.getDurability() != Durability.SKIP_WAL;
for (Cell cell : cells) {
KeyValue kv = KeyValueUtil.ensureKeyValue(cell);
mutationKvs.add(kv);
if (writeToWAL) {
walEdit.add(kv);
}
}
}
}
}
@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
return;
}
} else if (m instanceof Delete) {
Delete d = (Delete) m;
region.prepareDelete(d);
if (coprocessorHost.preDelete(d, walEdit, d.getDurability())) {
// by pass everything
return;
}
}
}
}
}
@Override
public void postProcess(HRegion region, WALEdit walEdit) 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());
}
}
}
}
@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;
}
}