| // Copyright 2018 The Bazel 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 com.google.devtools.build.lib.worker; |
| |
| import com.google.devtools.build.lib.actions.UserExecException; |
| import com.google.devtools.build.lib.sandbox.SandboxHelpers.SandboxInputs; |
| import com.google.devtools.build.lib.sandbox.SandboxHelpers.SandboxOutputs; |
| import com.google.devtools.build.lib.vfs.Path; |
| import com.google.devtools.build.lib.vfs.PathFragment; |
| import com.google.devtools.build.lib.worker.WorkerProtocol.WorkRequest; |
| import com.google.devtools.build.lib.worker.WorkerProtocol.WorkResponse; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Set; |
| import java.util.logging.Logger; |
| |
| /** A proxy that talks to the multiplexer */ |
| final class WorkerProxy extends Worker { |
| private static final Logger logger = Logger.getLogger(WorkerProxy.class.getName()); |
| private WorkerMultiplexer workerMultiplexer; |
| private String recordingStreamMessage; |
| |
| WorkerProxy( |
| WorkerKey workerKey, |
| int workerId, |
| Path workDir, |
| Path logFile, |
| WorkerMultiplexer workerMultiplexer) { |
| super(workerKey, workerId, workDir, logFile); |
| this.workerMultiplexer = workerMultiplexer; |
| } |
| |
| @Override |
| void createProcess() throws IOException { |
| workerMultiplexer.createProcess(workerKey, workDir, logFile); |
| } |
| |
| @Override |
| boolean isAlive() { |
| return workerMultiplexer.isProcessAlive(); |
| } |
| |
| @Override |
| public void prepareExecution( |
| SandboxInputs inputFiles, SandboxOutputs outputs, Set<PathFragment> workerFiles) |
| throws IOException { |
| createProcess(); |
| } |
| |
| @Override |
| synchronized void destroy() throws IOException { |
| super.destroy(); |
| try { |
| WorkerMultiplexerManager.removeInstance(workerKey.hashCode()); |
| } catch (InterruptedException e) { |
| logger.warning( |
| "InterruptedException was caught while destroying multiplexer. " |
| + "It could because the multiplexer was interrupted."); |
| } catch (UserExecException e) { |
| logger.warning(e.toString()); |
| } |
| } |
| |
| /** Send the WorkRequest to multiplexer. */ |
| @Override |
| void putRequest(WorkRequest request) throws IOException { |
| try { |
| workerMultiplexer.resetResponseChecker(workerId); |
| workerMultiplexer.putRequest(request); |
| } catch (InterruptedException e) { |
| /** |
| * We can't throw InterruptedException to WorkerSpawnRunner because of the principle of |
| * override. InterruptedException will happen when Bazel is waiting for semaphore but user |
| * terminates the process, so we do nothing here. |
| */ |
| logger.warning( |
| "InterruptedException was caught while sending worker request. " |
| + "It could because the multiplexer was interrupted."); |
| } |
| } |
| |
| /** Wait for WorkResponse from multiplexer. */ |
| @Override |
| WorkResponse getResponse() throws IOException { |
| try { |
| InputStream inputStream = workerMultiplexer.getResponse(workerId); |
| if (inputStream == null) { |
| return null; |
| } |
| return WorkResponse.parseDelimitedFrom(inputStream); |
| } catch (IOException e) { |
| recordingStreamMessage = e.toString(); |
| throw new IOException( |
| "IOException was caught while waiting for worker response. " |
| + "It could because the worker returned unparseable response."); |
| } catch (InterruptedException e) { |
| /** |
| * We can't throw InterruptedException to WorkerSpawnRunner because of the principle of |
| * override. InterruptedException will happen when Bazel is waiting for semaphore but user |
| * terminates the process, so we do nothing here. |
| */ |
| logger.warning( |
| "InterruptedException was caught while waiting for work response. " |
| + "It could because the multiplexer was interrupted."); |
| } |
| // response can be null when the worker has already closed stdout at this point and thus |
| // the InputStream is at EOF. |
| return null; |
| } |
| |
| @Override |
| String getRecordingStreamMessage() { |
| return recordingStreamMessage; |
| } |
| } |