| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.beam.runners.fnexecution.environment; |
| |
| import javax.annotation.concurrent.ThreadSafe; |
| import org.apache.beam.model.pipeline.v1.RunnerApi.Environment; |
| import org.apache.beam.runners.fnexecution.control.InstructionRequestHandler; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * A {@link RemoteEnvironment} that wraps a running Docker container. |
| * |
| * <p>A {@link DockerContainerEnvironment} owns both the underlying docker container that it |
| * communicates with an the {@link InstructionRequestHandler} that it uses to do so. |
| */ |
| @ThreadSafe |
| class DockerContainerEnvironment implements RemoteEnvironment { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(DockerContainerEnvironment.class); |
| |
| static DockerContainerEnvironment create( |
| DockerCommand docker, |
| Environment environment, |
| String containerId, |
| InstructionRequestHandler instructionHandler, |
| boolean retainDockerContainer) { |
| return new DockerContainerEnvironment( |
| docker, environment, containerId, instructionHandler, retainDockerContainer); |
| } |
| |
| private final Object lock = new Object(); |
| private final DockerCommand docker; |
| private final Environment environment; |
| private final String containerId; |
| private final InstructionRequestHandler instructionHandler; |
| private final boolean retainDockerContainer; |
| |
| private boolean isClosed = false; |
| |
| private DockerContainerEnvironment( |
| DockerCommand docker, |
| Environment environment, |
| String containerId, |
| InstructionRequestHandler instructionHandler, |
| boolean retainDockerContainer) { |
| this.docker = docker; |
| this.environment = environment; |
| this.containerId = containerId; |
| this.instructionHandler = instructionHandler; |
| this.retainDockerContainer = retainDockerContainer; |
| } |
| |
| @Override |
| public Environment getEnvironment() { |
| return environment; |
| } |
| |
| @Override |
| public InstructionRequestHandler getInstructionRequestHandler() { |
| return instructionHandler; |
| } |
| |
| /** |
| * Closes this remote docker environment. The associated {@link InstructionRequestHandler} should |
| * not be used after calling this. |
| */ |
| @Override |
| public void close() throws Exception { |
| synchronized (lock) { |
| // The running docker container and instruction handler should each only be terminated once. |
| // Do nothing if we have already requested termination. |
| if (!isClosed) { |
| isClosed = true; |
| instructionHandler.close(); |
| String containerLogs = docker.getContainerLogs(containerId); |
| LOG.info("Closing Docker container {}. Logs:\n{}", containerId, containerLogs); |
| docker.killContainer(containerId); |
| if (!retainDockerContainer) { |
| docker.removeContainer(containerId); |
| } |
| } |
| } |
| } |
| } |