content: /*
   * 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 org.apache.beam.model.pipeline.v1.RunnerApi;
  import org.apache.beam.runners.fnexecution.control.InstructionRequestHandler;
  
  /**
   * Environment for process-based execution. The environment is responsible for stopping the process.
   */
  public class ProcessEnvironment implements RemoteEnvironment {
  
    private final ProcessManager processManager;
    private final RunnerApi.Environment environment;
    private final String workerId;
    private final InstructionRequestHandler instructionHandler;
  
    private boolean isClosed;
  
    public static RemoteEnvironment create(
        ProcessManager processManager,
        RunnerApi.Environment environment,
        String workerId,
        InstructionRequestHandler instructionHandler) {
      return new ProcessEnvironment(processManager, environment, workerId, instructionHandler);
    }
  
    private ProcessEnvironment(
        ProcessManager processManager,
        RunnerApi.Environment environment,
        String workerId,
        InstructionRequestHandler instructionHandler) {
  
      this.processManager = processManager;
      this.environment = environment;
      this.workerId = workerId;
      this.instructionHandler = instructionHandler;
    }
  
    @Override
    public RunnerApi.Environment getEnvironment() {
      return environment;
    }
  
    @Override
    public InstructionRequestHandler getInstructionRequestHandler() {
      return instructionHandler;
    }
  
    @Override
    public synchronized void close() throws Exception {
      if (isClosed) {
        return;
      }
      Exception exception = null;
      try {
        processManager.stopProcess(workerId);
      } catch (Exception e) {
        exception = e;
      }
      try {
        instructionHandler.close();
      } catch (Exception e) {
        if (exception != null) {
          exception.addSuppressed(e);
        } else {
          exception = e;
        }
      }
      isClosed = true;
      if (exception != null) {
        throw exception;
      }
    }
  }
  