| /* |
| * 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.interpreter; |
| |
| |
| import java.net.URL; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Properties; |
| |
| import org.apache.zeppelin.annotation.ZeppelinApi; |
| import org.apache.zeppelin.annotation.Experimental; |
| import org.apache.zeppelin.interpreter.thrift.InterpreterCompletion; |
| import org.apache.zeppelin.scheduler.Scheduler; |
| import org.apache.zeppelin.scheduler.SchedulerFactory; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Interface for interpreters. |
| * If you want to implement new Zeppelin interpreter, extend this class |
| * |
| * Please see, |
| * https://zeppelin.apache.org/docs/latest/development/writingzeppelininterpreter.html |
| * |
| * open(), close(), interpret() is three the most important method you need to implement. |
| * cancel(), getProgress(), completion() is good to have |
| * getFormType(), getScheduler() determine Zeppelin's behavior |
| */ |
| public abstract class Interpreter { |
| |
| /** |
| * Opens interpreter. You may want to place your initialize routine here. |
| * open() is called only once |
| */ |
| @ZeppelinApi |
| public abstract void open(); |
| |
| /** |
| * Closes interpreter. You may want to free your resources up here. |
| * close() is called only once |
| */ |
| @ZeppelinApi |
| public abstract void close(); |
| |
| /** |
| * Run code and return result, in synchronous way. |
| * |
| * @param st statements to run |
| */ |
| @ZeppelinApi |
| public abstract InterpreterResult interpret(String st, InterpreterContext context); |
| |
| /** |
| * Optionally implement the canceling routine to abort interpret() method |
| */ |
| @ZeppelinApi |
| public abstract void cancel(InterpreterContext context); |
| |
| /** |
| * Dynamic form handling |
| * see http://zeppelin.apache.org/docs/dynamicform.html |
| * |
| * @return FormType.SIMPLE enables simple pattern replacement (eg. Hello ${name=world}), |
| * FormType.NATIVE handles form in API |
| */ |
| @ZeppelinApi |
| public abstract FormType getFormType(); |
| |
| /** |
| * get interpret() method running process in percentage. |
| * |
| * @return number between 0-100 |
| */ |
| @ZeppelinApi |
| public abstract int getProgress(InterpreterContext context); |
| |
| /** |
| * Get completion list based on cursor position. |
| * By implementing this method, it enables auto-completion. |
| * |
| * @param buf statements |
| * @param cursor cursor position in statements |
| * @return list of possible completion. Return empty list if there're nothing to return. |
| */ |
| @ZeppelinApi |
| public List<InterpreterCompletion> completion(String buf, int cursor) { |
| return null; |
| } |
| |
| /** |
| * Interpreter can implements it's own scheduler by overriding this method. |
| * There're two default scheduler provided, FIFO, Parallel. |
| * If your interpret() can handle concurrent request, use Parallel or use FIFO. |
| * |
| * You can get default scheduler by using |
| * SchedulerFactory.singleton().createOrGetFIFOScheduler() |
| * SchedulerFactory.singleton().createOrGetParallelScheduler() |
| * |
| * @return return scheduler instance. This method can be called multiple times and have to return |
| * the same instance. Can not return null. |
| */ |
| @ZeppelinApi |
| public Scheduler getScheduler() { |
| return SchedulerFactory.singleton().createOrGetFIFOScheduler("interpreter_" + this.hashCode()); |
| } |
| |
| public static Logger logger = LoggerFactory.getLogger(Interpreter.class); |
| private InterpreterGroup interpreterGroup; |
| private URL[] classloaderUrls; |
| protected Properties property; |
| private String userName; |
| |
| @ZeppelinApi |
| public Interpreter(Properties property) { |
| logger.debug("Properties: {}", property); |
| this.property = property; |
| } |
| |
| public void setProperty(Properties property) { |
| this.property = property; |
| } |
| |
| @ZeppelinApi |
| public Properties getProperty() { |
| Properties p = new Properties(); |
| p.putAll(property); |
| |
| RegisteredInterpreter registeredInterpreter = Interpreter.findRegisteredInterpreterByClassName( |
| getClassName()); |
| if (null != registeredInterpreter) { |
| Map<String, InterpreterProperty> defaultProperties = registeredInterpreter.getProperties(); |
| for (String k : defaultProperties.keySet()) { |
| if (!p.containsKey(k)) { |
| String value = defaultProperties.get(k).getValue(); |
| if (value != null) { |
| p.put(k, defaultProperties.get(k).getValue()); |
| } |
| } |
| } |
| } |
| |
| return p; |
| } |
| |
| @ZeppelinApi |
| public String getProperty(String key) { |
| logger.debug("key: {}, value: {}", key, getProperty().getProperty(key)); |
| |
| return getProperty().getProperty(key); |
| } |
| |
| |
| public String getClassName() { |
| return this.getClass().getName(); |
| } |
| |
| public void setUserName(String userName) { |
| this.userName = userName; |
| } |
| |
| public String getUserName() { |
| return this.userName; |
| } |
| |
| public void setInterpreterGroup(InterpreterGroup interpreterGroup) { |
| this.interpreterGroup = interpreterGroup; |
| } |
| |
| @ZeppelinApi |
| public InterpreterGroup getInterpreterGroup() { |
| return this.interpreterGroup; |
| } |
| |
| public URL[] getClassloaderUrls() { |
| return classloaderUrls; |
| } |
| |
| public void setClassloaderUrls(URL[] classloaderUrls) { |
| this.classloaderUrls = classloaderUrls; |
| } |
| |
| /** |
| * General function to register hook event |
| * |
| * @param noteId - Note to bind hook to |
| * @param event The type of event to hook to (pre_exec, post_exec) |
| * @param cmd The code to be executed by the interpreter on given event |
| */ |
| @Experimental |
| public void registerHook(String noteId, String event, String cmd) { |
| InterpreterHookRegistry hooks = interpreterGroup.getInterpreterHookRegistry(); |
| String className = getClassName(); |
| hooks.register(noteId, className, event, cmd); |
| } |
| |
| /** |
| * registerHook() wrapper for global scope |
| * |
| * @param event The type of event to hook to (pre_exec, post_exec) |
| * @param cmd The code to be executed by the interpreter on given event |
| */ |
| @Experimental |
| public void registerHook(String event, String cmd) { |
| registerHook(null, event, cmd); |
| } |
| |
| /** |
| * Get the hook code |
| * |
| * @param noteId - Note to bind hook to |
| * @param event The type of event to hook to (pre_exec, post_exec) |
| */ |
| @Experimental |
| public String getHook(String noteId, String event) { |
| InterpreterHookRegistry hooks = interpreterGroup.getInterpreterHookRegistry(); |
| String className = getClassName(); |
| return hooks.get(noteId, className, event); |
| } |
| |
| /** |
| * getHook() wrapper for global scope |
| * |
| * @param event The type of event to hook to (pre_exec, post_exec) |
| */ |
| @Experimental |
| public String getHook(String event) { |
| return getHook(null, event); |
| } |
| |
| /** |
| * Unbind code from given hook event |
| * |
| * @param noteId - Note to bind hook to |
| * @param event The type of event to hook to (pre_exec, post_exec) |
| */ |
| @Experimental |
| public void unregisterHook(String noteId, String event) { |
| InterpreterHookRegistry hooks = interpreterGroup.getInterpreterHookRegistry(); |
| String className = getClassName(); |
| hooks.unregister(noteId, className, event); |
| } |
| |
| /** |
| * unregisterHook() wrapper for global scope |
| * |
| * @param event The type of event to hook to (pre_exec, post_exec) |
| */ |
| @Experimental |
| public void unregisterHook(String event) { |
| unregisterHook(null, event); |
| } |
| |
| @ZeppelinApi |
| public Interpreter getInterpreterInTheSameSessionByClassName(String className) { |
| synchronized (interpreterGroup) { |
| for (List<Interpreter> interpreters : interpreterGroup.values()) { |
| boolean belongsToSameNoteGroup = false; |
| Interpreter interpreterFound = null; |
| for (Interpreter intp : interpreters) { |
| if (intp.getClassName().equals(className)) { |
| interpreterFound = intp; |
| } |
| |
| Interpreter p = intp; |
| while (p instanceof WrappedInterpreter) { |
| p = ((WrappedInterpreter) p).getInnerInterpreter(); |
| } |
| if (this == p) { |
| belongsToSameNoteGroup = true; |
| } |
| } |
| |
| if (belongsToSameNoteGroup) { |
| return interpreterFound; |
| } |
| } |
| } |
| return null; |
| } |
| |
| |
| /** |
| * Type of interpreter. |
| */ |
| public static enum FormType { |
| NATIVE, SIMPLE, NONE |
| } |
| |
| /** |
| * Represent registered interpreter class |
| */ |
| public static class RegisteredInterpreter { |
| |
| private String group; |
| private String name; |
| private String className; |
| private boolean defaultInterpreter; |
| private Map<String, InterpreterProperty> properties; |
| private Map<String, Object> editor; |
| private String path; |
| private InterpreterOption option; |
| private InterpreterRunner runner; |
| |
| public RegisteredInterpreter(String name, String group, String className, |
| Map<String, InterpreterProperty> properties) { |
| this(name, group, className, false, properties); |
| } |
| |
| public RegisteredInterpreter(String name, String group, String className, |
| boolean defaultInterpreter, Map<String, InterpreterProperty> properties) { |
| super(); |
| this.name = name; |
| this.group = group; |
| this.className = className; |
| this.defaultInterpreter = defaultInterpreter; |
| this.properties = properties; |
| this.editor = new HashMap<>(); |
| } |
| |
| public String getName() { |
| return name; |
| } |
| |
| public String getGroup() { |
| return group; |
| } |
| |
| public String getClassName() { |
| return className; |
| } |
| |
| public boolean isDefaultInterpreter() { |
| return defaultInterpreter; |
| } |
| |
| public void setDefaultInterpreter(boolean defaultInterpreter) { |
| this.defaultInterpreter = defaultInterpreter; |
| } |
| |
| public Map<String, InterpreterProperty> getProperties() { |
| return properties; |
| } |
| |
| public Map<String, Object> getEditor() { |
| return editor; |
| } |
| |
| public void setPath(String path) { |
| this.path = path; |
| } |
| |
| public String getPath() { |
| return path; |
| } |
| |
| public String getInterpreterKey() { |
| return getGroup() + "." + getName(); |
| } |
| |
| public InterpreterOption getOption() { |
| return option; |
| } |
| |
| public InterpreterRunner getRunner() { |
| return runner; |
| } |
| } |
| |
| /** |
| * Type of Scheduling. |
| */ |
| public static enum SchedulingMode { |
| FIFO, PARALLEL |
| } |
| |
| public static Map<String, RegisteredInterpreter> registeredInterpreters = Collections |
| .synchronizedMap(new HashMap<String, RegisteredInterpreter>()); |
| |
| @Deprecated |
| public static void register(String name, String group, String className, |
| Map<String, InterpreterProperty> properties) { |
| register(name, group, className, false, properties); |
| } |
| |
| @Deprecated |
| public static void register(String name, String group, String className, |
| boolean defaultInterpreter, Map<String, InterpreterProperty> properties) { |
| logger.warn("Static initialization is deprecated for interpreter {}, You should change it " + |
| "to use interpreter-setting.json in your jar or " + |
| "interpreter/{interpreter}/interpreter-setting.json", name); |
| register(new RegisteredInterpreter(name, group, className, defaultInterpreter, properties)); |
| } |
| |
| @Deprecated |
| public static void register(RegisteredInterpreter registeredInterpreter) { |
| String interpreterKey = registeredInterpreter.getInterpreterKey(); |
| if (!registeredInterpreters.containsKey(interpreterKey)) { |
| registeredInterpreters.put(interpreterKey, registeredInterpreter); |
| } else { |
| RegisteredInterpreter existInterpreter = registeredInterpreters.get(interpreterKey); |
| if (!existInterpreter.getProperties().equals(registeredInterpreter.getProperties())) { |
| logger.error("exist registeredInterpreter with the same key but has different settings."); |
| } |
| } |
| } |
| |
| public static RegisteredInterpreter findRegisteredInterpreterByClassName(String className) { |
| for (RegisteredInterpreter ri : registeredInterpreters.values()) { |
| if (ri.getClassName().equals(className)) { |
| return ri; |
| } |
| } |
| return null; |
| } |
| } |