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fix: catch all throwables so version mismatch won't hang the client (#…
…1402) * fix: catch all throwables so version mismatch won't hang the client * create a SafeResponseObserver * format * extend SafeResponseObserver * catch stream cancellation * update error log * update * throw on onStart * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md * fix version Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
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123 changes: 123 additions & 0 deletions
123
...d-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/stub/SafeResponseObserver.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,123 @@ | ||
| /* | ||
| * Copyright 2022 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; | ||
|
|
||
| import com.google.api.core.InternalApi; | ||
| import com.google.api.gax.rpc.ResponseObserver; | ||
| import com.google.api.gax.rpc.StreamController; | ||
| import java.util.concurrent.atomic.AtomicBoolean; | ||
| import java.util.logging.Level; | ||
| import java.util.logging.Logger; | ||
|
|
||
| /** | ||
| * Base implementation of {@link ResponseObserver} that checks the state and catches all the | ||
| * throwables. | ||
| */ | ||
| @InternalApi | ||
| public abstract class SafeResponseObserver<ResponseT> implements ResponseObserver<ResponseT> { | ||
|
|
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| private static final Logger LOGGER = Logger.getLogger(SafeResponseObserver.class.getName()); | ||
| private AtomicBoolean isStarted = new AtomicBoolean(false); | ||
| private AtomicBoolean isClosed = new AtomicBoolean(false); | ||
| private StreamController streamController; | ||
| private ResponseObserver outerObserver; | ||
|
|
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| public SafeResponseObserver(ResponseObserver outerObserver) { | ||
| this.outerObserver = outerObserver; | ||
| } | ||
|
|
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| @Override | ||
| public final void onStart(StreamController streamController) { | ||
| if (!isStarted.compareAndSet(false, true)) { | ||
| throw new IllegalStateException("A stream is already started"); | ||
| } | ||
|
|
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| this.streamController = streamController; | ||
| try { | ||
| onStartImpl(streamController); | ||
| } catch (Throwable t) { | ||
| if (!isClosed.compareAndSet(false, true)) { | ||
| logException("Tried to cancel a closed stream"); | ||
| return; | ||
| } | ||
| streamController.cancel(); | ||
| outerObserver.onError(t); | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public final void onResponse(ResponseT response) { | ||
| if (isClosed.get()) { | ||
| logException("Received a response after the stream is closed"); | ||
| return; | ||
| } | ||
| try { | ||
| onResponseImpl(response); | ||
| } catch (Throwable t1) { | ||
| try { | ||
| if (!isClosed.compareAndSet(false, true)) { | ||
| logException("Tried to cancel a closed stream"); | ||
| return; | ||
| } | ||
| streamController.cancel(); | ||
| } catch (Throwable t2) { | ||
| t1.addSuppressed(t2); | ||
| } | ||
| outerObserver.onError(t1); | ||
| } | ||
| } | ||
|
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||
| @Override | ||
| public final void onError(Throwable throwable) { | ||
| if (!isClosed.compareAndSet(false, true)) { | ||
| logException("Received error after the stream is closed"); | ||
| return; | ||
| } | ||
|
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| try { | ||
| onErrorImpl(throwable); | ||
| } catch (Throwable t) { | ||
| throwable.addSuppressed(t); | ||
| outerObserver.onError(throwable); | ||
| } | ||
| } | ||
|
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| @Override | ||
| public final void onComplete() { | ||
| if (!isClosed.compareAndSet(false, true)) { | ||
| logException("Tried to double close the stream"); | ||
| return; | ||
| } | ||
|
|
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| try { | ||
| onCompleteImpl(); | ||
| } catch (Throwable t) { | ||
| outerObserver.onError(t); | ||
| } | ||
| } | ||
|
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| private void logException(String message) { | ||
| LOGGER.log(Level.WARNING, message, new IllegalStateException(message)); | ||
| } | ||
|
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| protected abstract void onStartImpl(StreamController streamController); | ||
|
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| protected abstract void onResponseImpl(ResponseT response); | ||
|
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| protected abstract void onErrorImpl(Throwable throwable); | ||
|
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| protected abstract void onCompleteImpl(); | ||
| } |
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