| /* |
| * 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.wayang.api.python.executor; |
| |
| import java.lang.ProcessBuilder.Redirect; |
| import org.apache.wayang.api.python.function.PythonCode; |
| import org.apache.wayang.core.api.Configuration; |
| import org.apache.wayang.core.api.exception.WayangException; |
| |
| import java.io.IOException; |
| import java.net.InetAddress; |
| import java.net.ServerSocket; |
| import java.net.Socket; |
| import java.util.Arrays; |
| import java.util.Map; |
| import org.apache.wayang.core.util.ReflectionUtils; |
| |
| public class PythonProcessCaller { |
| |
| private Thread process; |
| private Socket socket; |
| private ServerSocket serverSocket; |
| private boolean ready; |
| |
| //TODO How to get the config |
| private Configuration configuration; |
| |
| public PythonProcessCaller(PythonCode serializedUDF){ |
| |
| //TODO create documentation to how to the configuration in the code |
| this.configuration = new Configuration(); |
| this.configuration.load(ReflectionUtils.loadResource("wayang-api-python-defaults.properties")); |
| this.ready = false; |
| byte[] addr = new byte[4]; |
| addr[0] = 127; addr[1] = 0; addr[2] = 0; addr[3] = 1; |
| |
| try { |
| /*TODO should NOT be assigned an specific port, set port as 0 (zero)*/ |
| this.serverSocket = new ServerSocket(0, 1, InetAddress.getByAddress(addr)); |
| |
| Runnable run1 = () -> { |
| ProcessBuilder pb = new ProcessBuilder( |
| Arrays.asList( |
| "python3", |
| this.configuration.getStringProperty("wayang.api.python.worker") |
| ) |
| ); |
| Map<String, String> workerEnv = pb.environment(); |
| workerEnv.put("PYTHON_WORKER_FACTORY_PORT", |
| String.valueOf(this.serverSocket.getLocalPort())); |
| |
| // TODO See what is happening with ENV Python version |
| workerEnv.put( |
| "PYTHONPATH", |
| this.configuration.getStringProperty("wayang.api.python.path") |
| ); |
| |
| pb.redirectOutput(Redirect.INHERIT); |
| pb.redirectError(Redirect.INHERIT); |
| try { |
| pb.start(); |
| } catch (IOException e) { |
| e.printStackTrace(); |
| } |
| }; |
| this.process = new Thread(run1); |
| this.process.start(); |
| |
| // Redirect worker stdout and stderr |
| //IDK redirectStreamsToStderr(worker.getInputStream, worker.getErrorStream) |
| |
| // Wait for it to connect to our socket |
| this.serverSocket.setSoTimeout(100000); |
| |
| try { |
| this.socket = this.serverSocket.accept(); |
| this.serverSocket.setSoTimeout(0); |
| |
| if(socket.isConnected()) |
| this.ready = true; |
| |
| } catch (Exception e) { |
| System.out.println(e); |
| throw new WayangException("Python worker failed to connect back.", e); |
| } |
| } catch (Exception e){ |
| System.out.println(e); |
| throw new WayangException("Python worker failed"); |
| } |
| } |
| |
| public Thread getProcess() { |
| return process; |
| } |
| |
| public Socket getSocket() { |
| return socket; |
| } |
| |
| public boolean isReady(){ |
| return ready; |
| } |
| |
| public void close(){ |
| try { |
| this.process.interrupt(); |
| this.socket.close(); |
| this.serverSocket.close(); |
| System.out.println("Everything closed"); |
| } catch (IOException e) { |
| e.printStackTrace(); |
| } |
| } |
| } |