/*
* 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.spark;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import com.google.common.reflect.TypeToken;
import com.google.gson.Gson;
import org.apache.commons.lang.StringUtils;
import org.apache.spark.repl.SparkILoop;
import org.apache.zeppelin.interpreter.Interpreter;
import org.apache.zeppelin.interpreter.InterpreterContext;
import org.apache.zeppelin.interpreter.InterpreterGroup;
import org.apache.zeppelin.interpreter.InterpreterResult;
import org.apache.zeppelin.interpreter.InterpreterResult.Code;
import org.apache.zeppelin.interpreter.WrappedInterpreter;
import org.apache.zeppelin.interpreter.thrift.InterpreterCompletion;
import org.apache.zeppelin.scheduler.Scheduler;
import org.apache.zeppelin.spark.dep.SparkDependencyContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.sonatype.aether.resolution.ArtifactResolutionException;
import org.sonatype.aether.resolution.DependencyResolutionException;
import scala.Console;
import scala.None;
import scala.Some;
import scala.collection.convert.WrapAsJava$;
import scala.collection.JavaConversions;
import scala.tools.nsc.Settings;
import scala.tools.nsc.interpreter.Completion.Candidates;
import scala.tools.nsc.interpreter.Completion.ScalaCompleter;
import scala.tools.nsc.interpreter.IMain;
import scala.tools.nsc.interpreter.Results;
import scala.tools.nsc.settings.MutableSettings.BooleanSetting;
import scala.tools.nsc.settings.MutableSettings.PathSetting;
/**
* DepInterpreter downloads dependencies and pass them when SparkInterpreter initialized.
* It extends SparkInterpreter but does not create sparkcontext
*
*/
public class DepInterpreter extends Interpreter {
/**
* intp - org.apache.spark.repl.SparkIMain (scala 2.10)
* intp - scala.tools.nsc.interpreter.IMain; (scala 2.11)
*/
private Object intp;
private ByteArrayOutputStream out;
private SparkDependencyContext depc;
/**
* completer - org.apache.spark.repl.SparkJLineCompletion (scala 2.10)
*/
private Object completer;
private SparkILoop interpreter;
static final Logger LOGGER = LoggerFactory.getLogger(DepInterpreter.class);
public DepInterpreter(Properties property) {
super(property);
}
public SparkDependencyContext getDependencyContext() {
return depc;
}
public static String getSystemDefault(
String envName,
String propertyName,
String defaultValue) {
if (envName != null && !envName.isEmpty()) {
String envValue = System.getenv().get(envName);
if (envValue != null) {
return envValue;
}
}
if (propertyName != null && !propertyName.isEmpty()) {
String propValue = System.getProperty(propertyName);
if (propValue != null) {
return propValue;
}
}
return defaultValue;
}
@Override
public void close() {
if (intp != null) {
Utils.invokeMethod(intp, "close");
}
}
@Override
public void open() {
out = new ByteArrayOutputStream();
createIMain();
}
private void createIMain() {
Settings settings = new Settings();
URL[] urls = getClassloaderUrls();
// set classpath for scala compiler
PathSetting pathSettings = settings.classpath();
String classpath = "";
List<File> paths = currentClassPath();
for (File f : paths) {
if (classpath.length() > 0) {
classpath += File.pathSeparator;
}
classpath += f.getAbsolutePath();
}
if (urls != null) {
for (URL u : urls) {
if (classpath.length() > 0) {
classpath += File.pathSeparator;
}
classpath += u.getFile();
}
}
pathSettings.v_$eq(classpath);
settings.scala$tools$nsc$settings$ScalaSettings$_setter_$classpath_$eq(pathSettings);
// set classloader for scala compiler
settings.explicitParentLoader_$eq(new Some<>(Thread.currentThread()
.getContextClassLoader()));
BooleanSetting b = (BooleanSetting) settings.usejavacp();
b.v_$eq(true);
settings.scala$tools$nsc$settings$StandardScalaSettings$_setter_$usejavacp_$eq(b);
interpreter = new SparkILoop((java.io.BufferedReader) null, new PrintWriter(out));
interpreter.settings_$eq(settings);
interpreter.createInterpreter();
intp = Utils.invokeMethod(interpreter, "intp");
if (Utils.isScala2_10()) {
Utils.invokeMethod(intp, "setContextClassLoader");
Utils.invokeMethod(intp, "initializeSynchronous");
}
depc = new SparkDependencyContext(getProperty("zeppelin.dep.localrepo"),
getProperty("zeppelin.dep.additionalRemoteRepository"));
if (Utils.isScala2_10()) {
completer = Utils.instantiateClass(
"org.apache.spark.repl.SparkJLineCompletion",
new Class[]{Utils.findClass("org.apache.spark.repl.SparkIMain")},
new Object[]{intp});
}
interpret("@transient var _binder = new java.util.HashMap[String, Object]()");
Map<String, Object> binder;
if (Utils.isScala2_10()) {
binder = (Map<String, Object>) getValue("_binder");
} else {
binder = (Map<String, Object>) getLastObject();
}
binder.put("depc", depc);
interpret("@transient val z = "
+ "_binder.get(\"depc\")"
+ ".asInstanceOf[org.apache.zeppelin.spark.dep.SparkDependencyContext]");
}
private Results.Result interpret(String line) {
return (Results.Result) Utils.invokeMethod(
intp,
"interpret",
new Class[] {String.class},
new Object[] {line});
}
public Object getValue(String name) {
Object ret = Utils.invokeMethod(
intp, "valueOfTerm", new Class[]{String.class}, new Object[]{name});
if (ret instanceof None) {
return null;
} else if (ret instanceof Some) {
return ((Some) ret).get();
} else {
return ret;
}
}
public Object getLastObject() {
IMain.Request r = (IMain.Request) Utils.invokeMethod(intp, "lastRequest");
Object obj = r.lineRep().call("$result",
JavaConversions.asScalaBuffer(new LinkedList<>()));
return obj;
}
@Override
public InterpreterResult interpret(String st, InterpreterContext context) {
PrintStream printStream = new PrintStream(out);
Console.setOut(printStream);
out.reset();
SparkInterpreter sparkInterpreter = getSparkInterpreter();
if (sparkInterpreter != null && sparkInterpreter.isSparkContextInitialized()) {
return new InterpreterResult(Code.ERROR,
"Must be used before SparkInterpreter (%spark) initialized\n" +
"Hint: put this paragraph before any Spark code and " +
"restart Zeppelin/Interpreter" );
}
scala.tools.nsc.interpreter.Results.Result ret = interpret(st);
Code code = getResultCode(ret);
try {
depc.fetch();
} catch (MalformedURLException | DependencyResolutionException
| ArtifactResolutionException e) {
LOGGER.error("Exception in DepInterpreter while interpret ", e);
return new InterpreterResult(Code.ERROR, e.toString());
}
if (code == Code.INCOMPLETE) {
return new InterpreterResult(code, "Incomplete expression");
} else if (code == Code.ERROR) {
return new InterpreterResult(code, out.toString());
} else {
return new InterpreterResult(code, out.toString());
}
}
private Code getResultCode(scala.tools.nsc.interpreter.Results.Result r) {
if (r instanceof scala.tools.nsc.interpreter.Results.Success$) {
return Code.SUCCESS;
} else if (r instanceof scala.tools.nsc.interpreter.Results.Incomplete$) {
return Code.INCOMPLETE;
} else {
return Code.ERROR;
}
}
@Override
public void cancel(InterpreterContext context) {
}
@Override
public FormType getFormType() {
return FormType.NATIVE;
}
@Override
public int getProgress(InterpreterContext context) {
return 0;
}
@Override
public List<InterpreterCompletion> completion(String buf, int cursor,
InterpreterContext interpreterContext) {
if (Utils.isScala2_10()) {
ScalaCompleter c = (ScalaCompleter) Utils.invokeMethod(completer, "completer");
Candidates ret = c.complete(buf, cursor);
List<String> candidates = WrapAsJava$.MODULE$.seqAsJavaList(ret.candidates());
List<InterpreterCompletion> completions = new LinkedList<>();
for (String candidate : candidates) {
completions.add(new InterpreterCompletion(candidate, candidate, StringUtils.EMPTY));
}
return completions;
} else {
return new LinkedList<>();
}
}
private List<File> currentClassPath() {
List<File> paths = classPath(Thread.currentThread().getContextClassLoader());
String[] cps = System.getProperty("java.class.path").split(File.pathSeparator);
if (cps != null) {
for (String cp : cps) {
paths.add(new File(cp));
}
}
return paths;
}
private List<File> classPath(ClassLoader cl) {
List<File> paths = new LinkedList<>();
if (cl == null) {
return paths;
}
if (cl instanceof URLClassLoader) {
URLClassLoader ucl = (URLClassLoader) cl;
URL[] urls = ucl.getURLs();
if (urls != null) {
for (URL url : urls) {
paths.add(new File(url.getFile()));
}
}
}
return paths;
}
private SparkInterpreter getSparkInterpreter() {
InterpreterGroup intpGroup = getInterpreterGroup();
if (intpGroup == null) {
return null;
}
Interpreter p = getInterpreterInTheSameSessionByClassName(SparkInterpreter.class.getName());
if (p == null) {
return null;
}
while (p instanceof WrappedInterpreter) {
p = ((WrappedInterpreter) p).getInnerInterpreter();
}
return (SparkInterpreter) p;
}
@Override
public Scheduler getScheduler() {
SparkInterpreter sparkInterpreter = getSparkInterpreter();
if (sparkInterpreter != null) {
return getSparkInterpreter().getScheduler();
} else {
return null;
}
}
}