io.grpc.internal.FailingClientStream Maven / Gradle / Ivy
/*
* Copyright 2016, gRPC 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 io.grpc.internal;
import com.google.common.base.Preconditions;
import io.grpc.Metadata;
import io.grpc.Status;
/**
* 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;
/**
* Creates a {@code FailingClientStream} that would fail with the given error.
*/
public FailingClientStream(Status error) {
Preconditions.checkArgument(!error.isOk(), "error must not be OK");
this.error = error;
}
@Override
public void start(ClientStreamListener listener) {
Preconditions.checkState(!started, "already started");
started = true;
listener.closed(error, new Metadata());
}
Status getError() {
return error;
}
}