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/**
* 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.client;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.hadoop.hbase.CellScannable;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.DoNotRetryIOException;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HRegionLocation;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.TableName;
import org.apache.yetus.audience.InterfaceAudience;
import org.apache.hadoop.hbase.shaded.protobuf.RequestConverter;
import org.apache.hadoop.hbase.shaded.protobuf.ResponseConverter;
import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos;
import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.MultiRequest;
import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.MutationProto;
import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.RegionAction;
import org.apache.hbase.thirdparty.com.google.protobuf.RpcController;
/**
* Callable that handles the multi method call going against a single
* regionserver; i.e. A RegionServerCallable for the multi call (It is NOT a
* RegionServerCallable that goes against multiple regions).
* @param
*/
@InterfaceAudience.Private
class MultiServerCallable extends CancellableRegionServerCallable {
private MultiAction multiAction;
private boolean cellBlock;
MultiServerCallable(final ClusterConnection connection, final TableName tableName,
final ServerName location, final MultiAction multi, RpcController rpcController,
int rpcTimeout, RetryingTimeTracker tracker, int priority) {
super(connection, tableName, null, rpcController, rpcTimeout, tracker, priority);
this.multiAction = multi;
// RegionServerCallable has HRegionLocation field, but this is a multi-region request.
// Using region info from parent HRegionLocation would be a mistake for this class; so
// we will store the server here, and throw if someone tries to obtain location/regioninfo.
this.location = new HRegionLocation(null, location);
this.cellBlock = isCellBlock();
}
public void reset(ServerName location, MultiAction multiAction) {
this.location = new HRegionLocation(null, location);
this.multiAction = multiAction;
this.cellBlock = isCellBlock();
}
@Override
protected HRegionLocation getLocation() {
throw new RuntimeException("Cannot get region location for multi-region request");
}
@Override
public HRegionInfo getHRegionInfo() {
throw new RuntimeException("Cannot get region info for multi-region request");
}
MultiAction getMulti() {
return this.multiAction;
}
@Override
protected MultiResponse rpcCall() throws Exception {
int countOfActions = this.multiAction.size();
if (countOfActions <= 0) throw new DoNotRetryIOException("No Actions");
MultiRequest.Builder multiRequestBuilder = MultiRequest.newBuilder();
RegionAction.Builder regionActionBuilder = RegionAction.newBuilder();
ClientProtos.Action.Builder actionBuilder = ClientProtos.Action.newBuilder();
MutationProto.Builder mutationBuilder = MutationProto.newBuilder();
// Pre-size. Presume at least a KV per Action. There are likely more.
List cells =
(this.cellBlock ? new ArrayList(countOfActions) : null);
long nonceGroup = multiAction.getNonceGroup();
// Map from a created RegionAction to the original index for a RowMutations/CheckAndMutate
// within the original list of actions. This will be used to process the results when there
// is RowMutations/CheckAndMutate in the action list.
Map indexMap = new HashMap<>();
// The multi object is a list of Actions by region. Iterate by region.
for (Map.Entry> e: this.multiAction.actions.entrySet()) {
final byte [] regionName = e.getKey();
final List actions = e.getValue();
if (this.cellBlock) {
// Send data in cellblocks.
// multiRequestBuilder will be populated with region actions.
// indexMap will be non-empty after the call if there is RowMutations/CheckAndMutate in
// the action list.
RequestConverter.buildNoDataRegionActions(regionName, actions, cells, multiRequestBuilder,
regionActionBuilder, actionBuilder, mutationBuilder, nonceGroup, indexMap);
} else {
// multiRequestBuilder will be populated with region actions.
// indexMap will be non-empty after the call if there is RowMutations/CheckAndMutate in
// the action list.
RequestConverter.buildRegionActions(regionName, actions, multiRequestBuilder,
regionActionBuilder, actionBuilder, mutationBuilder, nonceGroup, indexMap);
}
}
if (cells != null) {
setRpcControllerCellScanner(CellUtil.createCellScanner(cells));
}
ClientProtos.MultiRequest requestProto = multiRequestBuilder.build();
ClientProtos.MultiResponse responseProto = getStub().multi(getRpcController(), requestProto);
if (responseProto == null) return null; // Occurs on cancel
return ResponseConverter.getResults(requestProto, indexMap, responseProto,
getRpcControllerCellScanner());
}
/**
* @return True if we should send data in cellblocks. This is an expensive call. Cache the
* result if you can rather than call each time.
*/
private boolean isCellBlock() {
// This is not exact -- the configuration could have changed on us after connection was set up
// but it will do for now.
ClusterConnection conn = getConnection();
return conn.hasCellBlockSupport();
}
@Override
public void prepare(boolean reload) throws IOException {
// Use the location we were given in the constructor rather than go look it up.
setStub(getConnection().getClient(this.location.getServerName()));
}
ServerName getServerName() {
return location.getServerName();
}
}
