zjffdu commented on a change in pull request #3612: add MongoDB interpreter URL: https://github.com/apache/zeppelin/pull/3612#discussion_r369001907
########## File path: mongodb/src/main/java/org/apache/zeppelin/mongodb/MongoDbInterpreter.java ########## @@ -0,0 +1,190 @@ +/* + * 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.mongodb; + +import java.io.ByteArrayOutputStream; +import java.io.File; +import java.io.IOException; +import java.util.HashMap; +import java.util.Map; +import java.util.Properties; +import java.util.Scanner; + +import org.apache.commons.exec.CommandLine; +import org.apache.commons.exec.DefaultExecutor; +import org.apache.commons.exec.ExecuteException; +import org.apache.commons.exec.ExecuteWatchdog; +import org.apache.commons.exec.Executor; +import org.apache.commons.exec.PumpStreamHandler; +import org.apache.commons.io.FileUtils; +import org.apache.commons.lang.StringUtils; +import org.apache.zeppelin.interpreter.Interpreter; +import org.apache.zeppelin.interpreter.InterpreterContext; +import org.apache.zeppelin.interpreter.InterpreterResult; +import org.apache.zeppelin.interpreter.InterpreterResult.Code; +import org.apache.zeppelin.scheduler.Scheduler; +import org.apache.zeppelin.scheduler.SchedulerFactory; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * MongoDB interpreter. It uses the mongo shell to interpret the commands. + * + */ +public class MongoDbInterpreter extends Interpreter { + + private static final Logger LOGGER = LoggerFactory.getLogger(MongoDbInterpreter.class); + + private static final String SHELL_EXTENSION = + new Scanner(MongoDbInterpreter.class.getResourceAsStream("/shell_extension.js"), "UTF-8") + .useDelimiter("\\A").next(); + + private long commandTimeout = 60000; + + private String dbAddress; + + private Map<String, Executor> runningProcesses = new HashMap<>(); + + + public MongoDbInterpreter(Properties property) { + super(property); + } + + @Override + public void open() { + commandTimeout = Long.parseLong(getProperty("mongo.shell.command.timeout")); + dbAddress = getProperty("mongo.server.host") + ":" + + getProperty("mongo.server.port") + "/" + + getProperty("mongo.server.database"); + } + + @Override + public void close() { + //Nothing to do + } + + @Override + public FormType getFormType() { + return FormType.SIMPLE; + } + + @Override + public InterpreterResult interpret(String script, InterpreterContext context) { + LOGGER.debug("Run MongoDB script: {}", script); + + if (StringUtils.isEmpty(script)) { + return new InterpreterResult(Code.SUCCESS); + } + + // Write script in a temporary file + // The script is enriched with extensions + final File scriptFile = new File(getScriptFileName(context.getParagraphId())); + try { + FileUtils.write(scriptFile, + SHELL_EXTENSION + .replace("__ZEPPELIN_TABLE_LIMIT__", getProperty("mongo.shell.command.table.limit")) + + script); + } + catch (IOException e) { + LOGGER.error("Can not write script in temp file", e); + return new InterpreterResult(Code.ERROR, e.getMessage()); + } + + InterpreterResult result = new InterpreterResult(InterpreterResult.Code.SUCCESS); + + final DefaultExecutor executor = new DefaultExecutor(); + final ByteArrayOutputStream errorStream = new ByteArrayOutputStream(); + executor.setStreamHandler(new PumpStreamHandler(context.out, errorStream)); + executor.setWatchdog(new ExecuteWatchdog(commandTimeout)); //ExecuteWatchdog.INFINITE_TIMEOUT + + final CommandLine cmdLine = CommandLine.parse(getProperty("mongo.shell.path")); + cmdLine.addArgument("--quiet", false); + + if (!StringUtils.isEmpty(getProperty("mongo.server.username"))) { + cmdLine.addArgument("-u", false); + cmdLine.addArgument(getProperty("mongo.server.username"), false); + cmdLine.addArgument("-p", false); + cmdLine.addArgument(getProperty("mongo.server.password"), false); + + if (!StringUtils.isEmpty(getProperty("mongo.server.authentdatabase"))) { + cmdLine.addArgument("--authenticationDatabase", false); + cmdLine.addArgument(getProperty("mongo.server.authentdatabase"), false); + } + } + + cmdLine.addArgument(dbAddress, false); + cmdLine.addArgument(scriptFile.getAbsolutePath(), false); + + try { + executor.execute(cmdLine); + runningProcesses.put(context.getParagraphId(), executor); Review comment: Should remove it from Map after the process is completed ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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