forked from googleapis/java-bigtable
/
ReadRowsConvertExceptionCallable.java
87 lines (74 loc) · 2.88 KB
/
ReadRowsConvertExceptionCallable.java
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/*
* Copyright 2021 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
*
* https://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.bigtable.data.v2.stub.readrows;
import com.google.api.core.InternalApi;
import com.google.api.gax.rpc.ApiCallContext;
import com.google.api.gax.rpc.ApiException;
import com.google.api.gax.rpc.InternalException;
import com.google.api.gax.rpc.ResponseObserver;
import com.google.api.gax.rpc.ServerStreamingCallable;
import com.google.api.gax.rpc.StreamController;
/**
* This callable converts the "Received rst stream" exception into a retryable {@link ApiException}.
*/
@InternalApi
public final class ReadRowsConvertExceptionCallable<ReadRowsRequest, RowT>
extends ServerStreamingCallable<ReadRowsRequest, RowT> {
private final ServerStreamingCallable<ReadRowsRequest, RowT> innerCallable;
public ReadRowsConvertExceptionCallable(
ServerStreamingCallable<ReadRowsRequest, RowT> innerCallable) {
this.innerCallable = innerCallable;
}
@Override
public void call(
ReadRowsRequest request, ResponseObserver<RowT> responseObserver, ApiCallContext context) {
ReadRowsConvertExceptionResponseObserver<RowT> observer =
new ReadRowsConvertExceptionResponseObserver<>(responseObserver);
innerCallable.call(request, observer, context);
}
private class ReadRowsConvertExceptionResponseObserver<RowT> implements ResponseObserver<RowT> {
private final ResponseObserver<RowT> outerObserver;
ReadRowsConvertExceptionResponseObserver(ResponseObserver<RowT> outerObserver) {
this.outerObserver = outerObserver;
}
@Override
public void onStart(StreamController controller) {
outerObserver.onStart(controller);
}
@Override
public void onResponse(RowT response) {
outerObserver.onResponse(response);
}
@Override
public void onError(Throwable t) {
outerObserver.onError(convertException(t));
}
@Override
public void onComplete() {
outerObserver.onComplete();
}
}
private Throwable convertException(Throwable t) {
// Long lived connections sometimes are disconnected via an RST frame. This error is
// transient and should be retried.
if (t instanceof InternalException) {
if (t.getMessage() != null && t.getMessage().contains("Received Rst Stream")) {
return new InternalException(t, ((InternalException) t).getStatusCode(), true);
}
}
return t;
}
}