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Merge pull request apache#16 from Leemoonsoo/py4jdocker
Make python docker interpreter work using py4j Thank you!!
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python/src/main/java/org/apache/zeppelin/python/PythonDockerInterpreter.java
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| /* | ||
| * 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.zeppelin.python; | ||
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| import org.apache.zeppelin.interpreter.*; | ||
| import org.apache.zeppelin.scheduler.Scheduler; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| import java.io.*; | ||
| import java.nio.file.Paths; | ||
| import java.util.Properties; | ||
| import java.util.regex.Matcher; | ||
| import java.util.regex.Pattern; | ||
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| /** | ||
| * Helps run python interpreter on a docker container | ||
| */ | ||
| public class PythonDockerInterpreter extends Interpreter { | ||
| Logger logger = LoggerFactory.getLogger(PythonDockerInterpreter.class); | ||
| Pattern activatePattern = Pattern.compile("activate\\s*(.*)"); | ||
| Pattern deactivatePattern = Pattern.compile("deactivate"); | ||
| Pattern helpPattern = Pattern.compile("help"); | ||
| private File zeppelinHome; | ||
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| public PythonDockerInterpreter(Properties property) { | ||
| super(property); | ||
| } | ||
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| @Override | ||
| public void open() { | ||
| if (System.getenv("ZEPPELIN_HOME") != null) { | ||
| zeppelinHome = new File(System.getenv("ZEPPELIN_HOME")); | ||
| } else { | ||
| zeppelinHome = Paths.get("..").toAbsolutePath().toFile(); | ||
| } | ||
| } | ||
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| @Override | ||
| public void close() { | ||
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| } | ||
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| @Override | ||
| public InterpreterResult interpret(String st, InterpreterContext context) { | ||
| File pythonScript = new File(getPythonInterpreter().getScriptPath()); | ||
| InterpreterOutput out = context.out; | ||
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| Matcher activateMatcher = activatePattern.matcher(st); | ||
| Matcher deactivateMatcher = deactivatePattern.matcher(st); | ||
| Matcher helpMatcher = helpPattern.matcher(st); | ||
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| if (st == null || st.isEmpty() || helpMatcher.matches()) { | ||
| printUsage(out); | ||
| return new InterpreterResult(InterpreterResult.Code.SUCCESS); | ||
| } else if (activateMatcher.matches()) { | ||
| String image = activateMatcher.group(1); | ||
| pull(out, image); | ||
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| // mount pythonscript dir | ||
| String mountPythonScript = "-v " + | ||
| pythonScript.getParentFile().getAbsolutePath() + | ||
| ":/_zeppelin_tmp "; | ||
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| // mount zeppelin dir | ||
| String mountPy4j = "-v " + | ||
| zeppelinHome.getAbsolutePath() + | ||
| ":/_zeppelin "; | ||
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| // set PYTHONPATH | ||
| String pythonPath = ":/_zeppelin/" + PythonInterpreter.ZEPPELIN_PY4JPATH + ":" + | ||
| ":/_zeppelin/" + PythonInterpreter.ZEPPELIN_PYTHON_LIBS; | ||
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| setPythonCommand("docker run -i --rm " + | ||
| mountPythonScript + | ||
| mountPy4j + | ||
| "-e PYTHONPATH=\"" + pythonPath + "\" " + | ||
| image + | ||
| " python /_zeppelin_tmp/" + pythonScript.getName()); | ||
| restartPythonProcess(); | ||
| out.clear(); | ||
| return new InterpreterResult(InterpreterResult.Code.SUCCESS, "\"" + image + "\" activated"); | ||
| } else if (deactivateMatcher.matches()) { | ||
| setPythonCommand(null); | ||
| restartPythonProcess(); | ||
| return new InterpreterResult(InterpreterResult.Code.SUCCESS, "Deactivated"); | ||
| } else { | ||
| return new InterpreterResult(InterpreterResult.Code.ERROR, "Not supported command: " + st); | ||
| } | ||
| } | ||
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| public void setPythonCommand(String cmd) { | ||
| PythonInterpreter python = getPythonInterpreter(); | ||
| python.setPythonCommand(cmd); | ||
| } | ||
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| private void printUsage(InterpreterOutput out) { | ||
| try { | ||
| out.setType(InterpreterResult.Type.HTML); | ||
| out.writeResource("output_templates/docker_usage.html"); | ||
| } catch (IOException e) { | ||
| logger.error("Can't print usage", e); | ||
| } | ||
| } | ||
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| @Override | ||
| public void cancel(InterpreterContext context) { | ||
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| } | ||
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| @Override | ||
| public FormType getFormType() { | ||
| return FormType.NONE; | ||
| } | ||
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| @Override | ||
| public int getProgress(InterpreterContext context) { | ||
| return 0; | ||
| } | ||
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| /** | ||
| * Use python interpreter's scheduler. | ||
| * To make sure %python.docker paragraph and %python paragraph runs sequentially | ||
| */ | ||
| @Override | ||
| public Scheduler getScheduler() { | ||
| PythonInterpreter pythonInterpreter = getPythonInterpreter(); | ||
| if (pythonInterpreter != null) { | ||
| return pythonInterpreter.getScheduler(); | ||
| } else { | ||
| return null; | ||
| } | ||
| } | ||
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| private void restartPythonProcess() { | ||
| PythonInterpreter python = getPythonInterpreter(); | ||
| python.close(); | ||
| python.open(); | ||
| } | ||
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| protected PythonInterpreter getPythonInterpreter() { | ||
| LazyOpenInterpreter lazy = null; | ||
| PythonInterpreter python = null; | ||
| Interpreter p = getInterpreterInTheSameSessionByClassName(PythonInterpreter.class.getName()); | ||
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| while (p instanceof WrappedInterpreter) { | ||
| if (p instanceof LazyOpenInterpreter) { | ||
| lazy = (LazyOpenInterpreter) p; | ||
| } | ||
| p = ((WrappedInterpreter) p).getInnerInterpreter(); | ||
| } | ||
| python = (PythonInterpreter) p; | ||
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| if (lazy != null) { | ||
| lazy.open(); | ||
| } | ||
| return python; | ||
| } | ||
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| public boolean pull(InterpreterOutput out, String image) { | ||
| int exit = 0; | ||
| try { | ||
| exit = runCommand(out, "docker", "pull", image); | ||
| } catch (IOException | InterruptedException e) { | ||
| logger.error(e.getMessage(), e); | ||
| throw new InterpreterException(e); | ||
| } | ||
| return exit == 0; | ||
| } | ||
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| protected int runCommand(InterpreterOutput out, String... command) | ||
| throws IOException, InterruptedException { | ||
| ProcessBuilder builder = new ProcessBuilder(command); | ||
| builder.redirectErrorStream(true); | ||
| Process process = builder.start(); | ||
| InputStream stdout = process.getInputStream(); | ||
| BufferedReader br = new BufferedReader(new InputStreamReader(stdout)); | ||
| String line; | ||
| while ((line = br.readLine()) != null) { | ||
| out.write(line + "\n"); | ||
| } | ||
| int r = process.waitFor(); // Let the process finish. | ||
| return r; | ||
| } | ||
| } |
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