-
Notifications
You must be signed in to change notification settings - Fork 1.1k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Make all the unit tests work. ITs are failing pending on another PR.
- Loading branch information
Showing
6 changed files
with
193 additions
and
64 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
116 changes: 116 additions & 0 deletions
116
...le-cloud-spanner/src/test/java/com/google/cloud/spanner/ServerStreamingStashCallable.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| /* | ||
| * Copyright 2018 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.spanner; | ||
|
|
||
| import com.google.api.gax.rpc.ApiCallContext; | ||
| import com.google.api.gax.rpc.ResponseObserver; | ||
| import com.google.api.gax.rpc.ServerStream; | ||
| import com.google.api.gax.rpc.ServerStreamingCallable; | ||
| import com.google.api.gax.rpc.StreamController; | ||
| import com.google.common.base.Preconditions; | ||
| import com.google.common.collect.Queues; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.Queue; | ||
| import java.util.concurrent.CancellationException; | ||
|
|
||
| public class ServerStreamingStashCallable<RequestT, ResponseT> | ||
| extends ServerStreamingCallable<RequestT, ResponseT> { | ||
| private List<ResponseT> responseList; | ||
|
|
||
| public ServerStreamingStashCallable() { | ||
| responseList = new ArrayList<>(); | ||
| } | ||
|
|
||
| public ServerStreamingStashCallable(List<ResponseT> responseList) { | ||
| this.responseList = responseList; | ||
| } | ||
|
|
||
| @Override | ||
| public void call( | ||
| RequestT request, ResponseObserver<ResponseT> responseObserver, ApiCallContext context) { | ||
| Preconditions.checkNotNull(responseObserver); | ||
|
|
||
| StreamControllerStash<ResponseT> controller = | ||
| new StreamControllerStash<>(responseList, responseObserver); | ||
| controller.start(); | ||
| } | ||
|
|
||
| // Minimal implementation of back pressure aware stream controller. Not threadsafe | ||
| private static class StreamControllerStash<ResponseT> implements StreamController { | ||
| final ResponseObserver<ResponseT> observer; | ||
| final Queue<ResponseT> queue; | ||
| boolean autoFlowControl = true; | ||
| long numPending; | ||
| Throwable error; | ||
| boolean delivering, closed; | ||
|
|
||
| public StreamControllerStash( | ||
| List<ResponseT> responseList, ResponseObserver<ResponseT> observer) { | ||
| this.observer = observer; | ||
| this.queue = Queues.newArrayDeque(responseList); | ||
| } | ||
|
|
||
| public void start() { | ||
| observer.onStart(this); | ||
| if (autoFlowControl) { | ||
| numPending = Integer.MAX_VALUE; | ||
| } | ||
| deliver(); | ||
| } | ||
|
|
||
| @Override | ||
| public void disableAutoInboundFlowControl() { | ||
| autoFlowControl = false; | ||
| } | ||
|
|
||
| @Override | ||
| public void request(int count) { | ||
| numPending += count; | ||
| deliver(); | ||
| } | ||
|
|
||
| @Override | ||
| public void cancel() { | ||
| error = new CancellationException("User cancelled stream"); | ||
| deliver(); | ||
| } | ||
|
|
||
| private void deliver() { | ||
| if (delivering || closed) return; | ||
| delivering = true; | ||
|
|
||
| try { | ||
| while (error == null && numPending > 0 && !queue.isEmpty()) { | ||
| numPending--; | ||
| observer.onResponse(queue.poll()); | ||
| } | ||
|
|
||
| if (error != null || queue.isEmpty()) { | ||
| if (error != null) { | ||
| observer.onError(error); | ||
| } else { | ||
| observer.onComplete(); | ||
| } | ||
| closed = true; | ||
| } | ||
| } finally { | ||
| delivering = false; | ||
| } | ||
| } | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters