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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.hdds.scm;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdds.protocol.DatanodeDetails;
import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos.ContainerCommandRequestProto;
import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos.ContainerCommandResponseProto;
import org.apache.hadoop.hdds.protocol.datanode.proto.XceiverClientProtocolServiceGrpc;
import org.apache.hadoop.hdds.protocol.datanode.proto.XceiverClientProtocolServiceGrpc.XceiverClientProtocolServiceStub;
import org.apache.hadoop.hdds.protocol.proto.HddsProtos;
import org.apache.hadoop.hdds.scm.client.HddsClientUtils;
import org.apache.hadoop.hdds.scm.container.common.helpers.Pipeline;
import org.apache.hadoop.ozone.OzoneConfigKeys;
import org.apache.hadoop.util.Time;
import org.apache.ratis.shaded.io.grpc.ManagedChannel;
import org.apache.ratis.shaded.io.grpc.netty.NettyChannelBuilder;
import org.apache.ratis.shaded.io.grpc.stub.StreamObserver;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;
/**
* A Client for the storageContainer protocol.
*/
public class XceiverClientGrpc extends XceiverClientSpi {
static final Logger LOG = LoggerFactory.getLogger(XceiverClientGrpc.class);
private final Pipeline pipeline;
private final Configuration config;
private XceiverClientProtocolServiceStub asyncStub;
private XceiverClientMetrics metrics;
private ManagedChannel channel;
private final Semaphore semaphore;
/**
* Constructs a client that can communicate with the Container framework on
* data nodes.
*
* @param pipeline - Pipeline that defines the machines.
* @param config -- Ozone Config
*/
public XceiverClientGrpc(Pipeline pipeline, Configuration config) {
super();
Preconditions.checkNotNull(pipeline);
Preconditions.checkNotNull(config);
this.pipeline = pipeline;
this.config = config;
this.semaphore =
new Semaphore(HddsClientUtils.getMaxOutstandingRequests(config));
this.metrics = XceiverClientManager.getXceiverClientMetrics();
}
@Override
public void connect() throws Exception {
DatanodeDetails leader = this.pipeline.getLeader();
// read port from the data node, on failure use default configured
// port.
int port = leader.getPort(DatanodeDetails.Port.Name.STANDALONE).getValue();
if (port == 0) {
port = config.getInt(OzoneConfigKeys.DFS_CONTAINER_IPC_PORT,
OzoneConfigKeys.DFS_CONTAINER_IPC_PORT_DEFAULT);
}
LOG.debug("Connecting to server Port : " + leader.getIpAddress());
channel = NettyChannelBuilder.forAddress(leader.getIpAddress(), port)
.usePlaintext(true)
.maxInboundMessageSize(OzoneConfigKeys.DFS_CONTAINER_CHUNK_MAX_SIZE)
.build();
asyncStub = XceiverClientProtocolServiceGrpc.newStub(channel);
}
/**
* Returns if the xceiver client connects to a server.
*
* @return True if the connection is alive, false otherwise.
*/
@VisibleForTesting
public boolean isConnected() {
return !channel.isTerminated() && !channel.isShutdown();
}
@Override
public void close() {
channel.shutdownNow();
try {
channel.awaitTermination(60, TimeUnit.MINUTES);
} catch (Exception e) {
LOG.error("Unexpected exception while waiting for channel termination",
e);
}
}
@Override
public Pipeline getPipeline() {
return pipeline;
}
@Override
public ContainerCommandResponseProto sendCommand(
ContainerCommandRequestProto request) throws IOException {
try {
return sendCommandAsync(request).get();
} catch (ExecutionException | InterruptedException e) {
/**
* In case the grpc channel handler throws an exception,
* the exception thrown will be wrapped within {@link ExecutionException}.
* Unwarpping here so that original exception gets passed
* to to the client.
*/
if (e instanceof ExecutionException) {
Throwable cause = e.getCause();
if (cause instanceof IOException) {
throw (IOException) cause;
}
}
throw new IOException(
"Unexpected exception during execution:" + e.getMessage());
}
}
/**
* Sends a given command to server gets a waitable future back.
*
* @param request Request
* @return Response to the command
* @throws IOException
*/
@Override
public CompletableFuture<ContainerCommandResponseProto>
sendCommandAsync(ContainerCommandRequestProto request)
throws IOException, ExecutionException, InterruptedException {
final CompletableFuture<ContainerCommandResponseProto> replyFuture =
new CompletableFuture<>();
semaphore.acquire();
long requestTime = Time.monotonicNowNanos();
metrics.incrPendingContainerOpsMetrics(request.getCmdType());
// create a new grpc stream for each non-async call.
final StreamObserver<ContainerCommandRequestProto> requestObserver =
asyncStub.send(new StreamObserver<ContainerCommandResponseProto>() {
@Override
public void onNext(ContainerCommandResponseProto value) {
replyFuture.complete(value);
metrics.decrPendingContainerOpsMetrics(request.getCmdType());
metrics.addContainerOpsLatency(request.getCmdType(),
Time.monotonicNowNanos() - requestTime);
semaphore.release();
}
@Override
public void onError(Throwable t) {
replyFuture.completeExceptionally(t);
metrics.decrPendingContainerOpsMetrics(request.getCmdType());
metrics.addContainerOpsLatency(request.getCmdType(),
Time.monotonicNowNanos() - requestTime);
semaphore.release();
}
@Override
public void onCompleted() {
if (!replyFuture.isDone()) {
replyFuture.completeExceptionally(
new IOException("Stream completed but no reply for request "
+ request));
}
}
});
requestObserver.onNext(request);
requestObserver.onCompleted();
return replyFuture;
}
/**
* Create a pipeline.
*
* @param pipelineID - Name of the pipeline.
* @param datanodes - Datanodes
*/
@Override
public void createPipeline(String pipelineID, List<DatanodeDetails> datanodes)
throws IOException {
// For stand alone pipeline, there is no notion called setup pipeline.
return;
}
/**
* Returns pipeline Type.
*
* @return - Stand Alone as the type.
*/
@Override
public HddsProtos.ReplicationType getPipelineType() {
return HddsProtos.ReplicationType.STAND_ALONE;
}
}
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