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// Copyright 2017 The Bazel Authors. All rights reserved.
//
// Licensed 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 com.google.devtools.build.lib.buildeventservice.client;
import static com.google.devtools.build.lib.util.Preconditions.checkNotNull;
import static com.google.devtools.build.lib.util.Preconditions.checkState;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import com.google.common.base.Function;
import com.google.common.base.Throwables;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.SettableFuture;
import com.google.devtools.build.v1.PublishBuildEventGrpc;
import com.google.devtools.build.v1.PublishBuildEventGrpc.PublishBuildEventBlockingStub;
import com.google.devtools.build.v1.PublishBuildEventGrpc.PublishBuildEventStub;
import com.google.devtools.build.v1.PublishBuildToolEventStreamRequest;
import com.google.devtools.build.v1.PublishBuildToolEventStreamResponse;
import com.google.devtools.build.v1.PublishLifecycleEventRequest;
import io.grpc.CallCredentials;
import io.grpc.ManagedChannel;
import io.grpc.Status;
import io.grpc.StatusRuntimeException;
import io.grpc.stub.AbstractStub;
import io.grpc.stub.StreamObserver;
import java.util.concurrent.atomic.AtomicReference;
import javax.annotation.Nullable;
import org.joda.time.Duration;
/** Implementation of BuildEventServiceClient that uploads data using gRPC. */
public class BuildEventServiceGrpcClient implements BuildEventServiceClient {
/** Max wait time for a single non-streaming RPC to finish */
private static final Duration RPC_TIMEOUT = Duration.standardSeconds(15);
private final PublishBuildEventStub besAsync;
private final PublishBuildEventBlockingStub besBlocking;
private final ManagedChannel channel;
private final AtomicReference<StreamObserver<PublishBuildToolEventStreamRequest>> streamReference;
public BuildEventServiceGrpcClient(
ManagedChannel channel,
@Nullable CallCredentials callCredentials) {
this.channel = channel;
this.besAsync = withCallCredentials(
PublishBuildEventGrpc.newStub(channel), callCredentials);
this.besBlocking = withCallCredentials(
PublishBuildEventGrpc.newBlockingStub(channel), callCredentials);
this.streamReference = new AtomicReference<>(null);
}
private static <T extends AbstractStub<T>> T withCallCredentials(
T stub, @Nullable CallCredentials callCredentials) {
stub = callCredentials != null ? stub.withCallCredentials(callCredentials) : stub;
return stub;
}
@Override
public Status publish(PublishLifecycleEventRequest lifecycleEvent) throws Exception {
besBlocking
.withDeadlineAfter(RPC_TIMEOUT.getMillis(), MILLISECONDS)
.publishLifecycleEvent(lifecycleEvent);
return Status.OK;
}
@Override
public ListenableFuture<Status> openStream(
Function<PublishBuildToolEventStreamResponse, Void> ack)
throws Exception {
SettableFuture<Status> streamFinished = SettableFuture.create();
checkState(
streamReference.compareAndSet(null, createStream(ack, streamFinished)),
"Starting a new stream without closing the previous one");
return streamFinished;
}
private StreamObserver<PublishBuildToolEventStreamRequest> createStream(
final Function<PublishBuildToolEventStreamResponse, Void> ack,
final SettableFuture<Status> streamFinished) {
return besAsync.publishBuildToolEventStream(
new StreamObserver<PublishBuildToolEventStreamResponse>() {
@Override
public void onNext(PublishBuildToolEventStreamResponse response) {
ack.apply(response);
}
@Override
public void onError(Throwable t) {
streamReference.set(null);
streamFinished.setException(t);
}
@Override
public void onCompleted() {
streamReference.set(null);
streamFinished.set(Status.OK);
}
});
}
@Override
public void sendOverStream(PublishBuildToolEventStreamRequest buildEvent) throws Exception {
checkNotNull(streamReference.get(), "Attempting to send over a closed or unopened stream")
.onNext(buildEvent);
}
@Override
public void closeStream() {
StreamObserver<PublishBuildToolEventStreamRequest> stream;
if ((stream = streamReference.getAndSet(null)) != null) {
stream.onCompleted();
}
}
@Override
public void abortStream(Status status) {
StreamObserver<PublishBuildToolEventStreamRequest> stream;
if ((stream = streamReference.getAndSet(null)) != null) {
stream.onError(status.asException());
}
}
@Override
public boolean isStreamActive() {
return streamReference.get() != null;
}
@Override
public void shutdown() throws InterruptedException {
this.channel.shutdown();
}
@Override
public String userReadableError(Throwable t) {
if (t instanceof StatusRuntimeException) {
Throwable rootCause = Throwables.getRootCause(t);
String message = ((StatusRuntimeException) t).getStatus().getCode().name();
message += ": " + rootCause.getMessage();
return message;
} else {
return t.getMessage();
}
}
}
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