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/*
* Copyright 2016 The gRPC Authors
*
* 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 io.grpc.internal;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import io.grpc.ClientStreamTracer;
import io.grpc.Metadata;
import io.grpc.Status;
import io.grpc.internal.ClientStreamListener.RpcProgress;
/**
* An implementation of {@link ClientStream} that fails (by calling {@link
* ClientStreamListener#closed}) when started, and silently does nothing for the other operations.
*/
public final class FailingClientStream extends NoopClientStream {
private boolean started;
private final Status error;
private final RpcProgress rpcProgress;
private final ClientStreamTracer[] tracers;
/**
* Creates a {@code FailingClientStream} that would fail with the given error.
*/
public FailingClientStream(Status error, ClientStreamTracer[] tracers) {
this(error, RpcProgress.PROCESSED, tracers);
}
/**
* Creates a {@code FailingClientStream} that would fail with the given error.
*/
public FailingClientStream(
Status error, RpcProgress rpcProgress, ClientStreamTracer[] tracers) {
Preconditions.checkArgument(!error.isOk(), "error must not be OK");
this.error = error;
this.rpcProgress = rpcProgress;
this.tracers = tracers;
}
@Override
public void start(ClientStreamListener listener) {
Preconditions.checkState(!started, "already started");
started = true;
for (ClientStreamTracer tracer : tracers) {
tracer.streamClosed(error);
}
listener.closed(error, rpcProgress, new Metadata());
}
@VisibleForTesting
Status getError() {
return error;
}
@Override
public void appendTimeoutInsight(InsightBuilder insight) {
insight.appendKeyValue("error", error).appendKeyValue("progress", rpcProgress);
}
}
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