/
FakeBigQueryWriteImpl.java
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/
FakeBigQueryWriteImpl.java
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/*
* Copyright 2016 Google LLC
*
* 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.cloud.bigquery.storage.v1alpha2;
import com.google.cloud.bigquery.storage.v1alpha2.Storage.*;
import com.google.common.base.Optional;
import io.grpc.stub.StreamObserver;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.logging.Logger;
import org.threeten.bp.Duration;
/**
* A fake implementation of {@link BigQueryWriteImplBase} that can acts like server in StreamWriter
* unit testing.
*/
class FakeBigQueryWriteImpl extends BigQueryWriteGrpc.BigQueryWriteImplBase {
private static final Logger LOG = Logger.getLogger(FakeBigQueryWriteImpl.class.getName());
private final LinkedBlockingQueue<AppendRowsRequest> requests = new LinkedBlockingQueue<>();
private final LinkedBlockingQueue<GetWriteStreamRequest> writeRequests =
new LinkedBlockingQueue<>();
private final LinkedBlockingQueue<FlushRowsRequest> flushRequests = new LinkedBlockingQueue<>();
private final LinkedBlockingQueue<Response> responses = new LinkedBlockingQueue<>();
private final LinkedBlockingQueue<Stream.WriteStream> writeResponses =
new LinkedBlockingQueue<>();
private final LinkedBlockingQueue<FlushRowsResponse> flushResponses = new LinkedBlockingQueue<>();
private final AtomicInteger nextMessageId = new AtomicInteger(1);
private boolean autoPublishResponse;
private ScheduledExecutorService executor = null;
private Duration responseDelay = Duration.ZERO;
/** Class used to save the state of a possible response. */
private static class Response {
Optional<AppendRowsResponse> appendResponse;
Optional<Throwable> error;
public Response(AppendRowsResponse appendResponse) {
this.appendResponse = Optional.of(appendResponse);
this.error = Optional.absent();
}
public Response(Throwable exception) {
this.appendResponse = Optional.absent();
this.error = Optional.of(exception);
}
public AppendRowsResponse getResponse() {
return appendResponse.get();
}
public Throwable getError() {
return error.get();
}
boolean isError() {
return error.isPresent();
}
@Override
public String toString() {
if (isError()) {
return error.get().toString();
}
return appendResponse.get().toString();
}
}
@Override
public void getWriteStream(
GetWriteStreamRequest request, StreamObserver<Stream.WriteStream> responseObserver) {
Object response = writeResponses.remove();
if (response instanceof Stream.WriteStream) {
writeRequests.add(request);
responseObserver.onNext((Stream.WriteStream) response);
responseObserver.onCompleted();
} else if (response instanceof Exception) {
responseObserver.onError((Exception) response);
} else {
responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
}
}
@Override
public void flushRows(
FlushRowsRequest request, StreamObserver<FlushRowsResponse> responseObserver) {
Object response = writeResponses.remove();
if (response instanceof FlushRowsResponse) {
flushRequests.add(request);
responseObserver.onNext((FlushRowsResponse) response);
responseObserver.onCompleted();
} else if (response instanceof Exception) {
responseObserver.onError((Exception) response);
} else {
responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
}
}
@Override
public StreamObserver<AppendRowsRequest> appendRows(
final StreamObserver<AppendRowsResponse> responseObserver) {
StreamObserver<AppendRowsRequest> requestObserver =
new StreamObserver<AppendRowsRequest>() {
@Override
public void onNext(AppendRowsRequest value) {
LOG.info("Get request:" + value.toString());
final Response response = responses.remove();
requests.add(value);
if (responseDelay == Duration.ZERO) {
sendResponse(response, responseObserver);
} else {
final Response responseToSend = response;
LOG.info("Schedule a response to be sent at delay");
executor.schedule(
new Runnable() {
@Override
public void run() {
sendResponse(responseToSend, responseObserver);
}
},
responseDelay.toMillis(),
TimeUnit.MILLISECONDS);
}
}
@Override
public void onError(Throwable t) {
responseObserver.onError(t);
}
@Override
public void onCompleted() {
responseObserver.onCompleted();
}
};
return requestObserver;
}
private void sendResponse(
Response response, StreamObserver<AppendRowsResponse> responseObserver) {
LOG.info("Sending response: " + response.toString());
if (response.isError()) {
responseObserver.onError(response.getError());
} else {
responseObserver.onNext(response.getResponse());
}
}
/** Set an executor to use to delay publish responses. */
public FakeBigQueryWriteImpl setExecutor(ScheduledExecutorService executor) {
this.executor = executor;
return this;
}
/** Set an amount of time by which to delay publish responses. */
public FakeBigQueryWriteImpl setResponseDelay(Duration responseDelay) {
this.responseDelay = responseDelay;
return this;
}
public FakeBigQueryWriteImpl addResponse(AppendRowsResponse appendRowsResponse) {
responses.add(new Response(appendRowsResponse));
return this;
}
public FakeBigQueryWriteImpl addResponse(AppendRowsResponse.Builder appendResponseBuilder) {
return addResponse(appendResponseBuilder.build());
}
public FakeBigQueryWriteImpl addWriteStreamResponse(Stream.WriteStream response) {
writeResponses.add(response);
return this;
}
public FakeBigQueryWriteImpl addFlushRowsResponse(FlushRowsResponse response) {
flushResponses.add(response);
return this;
}
public FakeBigQueryWriteImpl addConnectionError(Throwable error) {
responses.add(new Response(error));
return this;
}
public List<AppendRowsRequest> getCapturedRequests() {
return new ArrayList<AppendRowsRequest>(requests);
}
public List<GetWriteStreamRequest> getCapturedWriteRequests() {
return new ArrayList<GetWriteStreamRequest>(writeRequests);
}
public void reset() {
requests.clear();
responses.clear();
}
}