org.apache.hadoop.hbase.client.RegionCoprocessorRpcChannel Maven / Gradle / Ivy
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* 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 com.google.protobuf.Descriptors;
import com.google.protobuf.Message;
import com.google.protobuf.RpcController;
import io.opentelemetry.context.Context;
import io.opentelemetry.context.Scope;
import java.io.IOException;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.ipc.CoprocessorRpcUtils;
import org.apache.yetus.audience.InterfaceAudience;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.CoprocessorServiceRequest;
import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.CoprocessorServiceResponse;
/**
* Provides clients with an RPC connection to call Coprocessor Endpoint
* {@link com.google.protobuf.Service}s against a given table region. An instance of this class may
* be obtained by calling {@link org.apache.hadoop.hbase.client.Table#coprocessorService(byte[])},
* but should normally only be used in creating a new {@link com.google.protobuf.Service} stub to
* call the endpoint methods.
* @see org.apache.hadoop.hbase.client.Table#coprocessorService(byte[])
*/
@InterfaceAudience.Private
class RegionCoprocessorRpcChannel extends SyncCoprocessorRpcChannel {
private static final Logger LOG = LoggerFactory.getLogger(RegionCoprocessorRpcChannel.class);
private final TableName table;
private final byte[] row;
private final ClusterConnection conn;
private byte[] lastRegion;
private final int operationTimeout;
private final RpcRetryingCallerFactory rpcCallerFactory;
/**
* Constructor
* @param conn connection to use
* @param table to connect to
* @param row to locate region with
*/
RegionCoprocessorRpcChannel(ClusterConnection conn, TableName table, byte[] row) {
this.table = table;
this.row = row;
this.conn = conn;
this.operationTimeout = conn.getConnectionConfiguration().getOperationTimeout();
this.rpcCallerFactory = conn.getRpcRetryingCallerFactory();
}
@Override
protected Message callExecService(final RpcController controller,
final Descriptors.MethodDescriptor method, final Message request,
final Message responsePrototype) throws IOException {
if (LOG.isTraceEnabled()) {
LOG.trace("Call: " + method.getName() + ", " + request.toString());
}
if (row == null) {
throw new NullPointerException("Can't be null!");
}
final Context context = Context.current();
ClientServiceCallable callable =
new ClientServiceCallable(this.conn, this.table, this.row,
this.conn.getRpcControllerFactory().newController(), HConstants.PRIORITY_UNSET) {
@Override
protected CoprocessorServiceResponse rpcCall() throws Exception {
try (Scope ignored = context.makeCurrent()) {
byte[] regionName = getLocation().getRegionInfo().getRegionName();
CoprocessorServiceRequest csr =
CoprocessorRpcUtils.getCoprocessorServiceRequest(method, request, row, regionName);
return getStub().execService(getRpcController(), csr);
}
}
};
CoprocessorServiceResponse result = this.rpcCallerFactory
. newCaller().callWithRetries(callable, operationTimeout);
this.lastRegion = result.getRegion().getValue().toByteArray();
return CoprocessorRpcUtils.getResponse(result, responsePrototype);
}
/**
* Get last region this RpcChannel communicated with
* @return region name as byte array
*/
public byte[] getLastRegion() {
return lastRegion;
}
}