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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.spark.launcher;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Parser for spark-submit command line options.
* <p/>
* This class encapsulates the parsing code for spark-submit command line options, so that there
* is a single list of options that needs to be maintained (well, sort of, but it makes it harder
* to break things).
*/
class SparkSubmitOptionParser {
// The following constants define the "main" name for the available options. They're defined
// to avoid copy & paste of the raw strings where they're needed.
//
// The fields are not static so that they're exposed to Scala code that uses this class. See
// SparkSubmitArguments.scala. That is also why this class is not abstract - to allow code to
// easily use these constants without having to create dummy implementations of this class.
protected final String CLASS = "--class";
protected final String CONF = "--conf";
protected final String DEPLOY_MODE = "--deploy-mode";
protected final String DRIVER_CLASS_PATH = "--driver-class-path";
protected final String DRIVER_CORES = "--driver-cores";
protected final String DRIVER_JAVA_OPTIONS = "--driver-java-options";
protected final String DRIVER_LIBRARY_PATH = "--driver-library-path";
protected final String DRIVER_MEMORY = "--driver-memory";
protected final String EXECUTOR_MEMORY = "--executor-memory";
protected final String FILES = "--files";
protected final String JARS = "--jars";
protected final String KILL_SUBMISSION = "--kill";
protected final String MASTER = "--master";
protected final String NAME = "--name";
protected final String PACKAGES = "--packages";
protected final String PROPERTIES_FILE = "--properties-file";
protected final String PROXY_USER = "--proxy-user";
protected final String PY_FILES = "--py-files";
protected final String REPOSITORIES = "--repositories";
protected final String STATUS = "--status";
protected final String TOTAL_EXECUTOR_CORES = "--total-executor-cores";
// Options that do not take arguments.
protected final String HELP = "--help";
protected final String SUPERVISE = "--supervise";
protected final String VERBOSE = "--verbose";
protected final String VERSION = "--version";
// Standalone-only options.
// YARN-only options.
protected final String ARCHIVES = "--archives";
protected final String EXECUTOR_CORES = "--executor-cores";
protected final String QUEUE = "--queue";
protected final String NUM_EXECUTORS = "--num-executors";
/**
* This is the canonical list of spark-submit options. Each entry in the array contains the
* different aliases for the same option; the first element of each entry is the "official"
* name of the option, passed to {@link #handle(String, String)}.
* <p/>
* Options not listed here nor in the "switch" list below will result in a call to
* {@link $#handleUnknown(String)}.
* <p/>
* These two arrays are visible for tests.
*/
final String[][] opts = {
{ ARCHIVES },
{ CLASS },
{ CONF, "-c" },
{ DEPLOY_MODE },
{ DRIVER_CLASS_PATH },
{ DRIVER_CORES },
{ DRIVER_JAVA_OPTIONS },
{ DRIVER_LIBRARY_PATH },
{ DRIVER_MEMORY },
{ EXECUTOR_CORES },
{ EXECUTOR_MEMORY },
{ FILES },
{ JARS },
{ KILL_SUBMISSION },
{ MASTER },
{ NAME },
{ NUM_EXECUTORS },
{ PACKAGES },
{ PROPERTIES_FILE },
{ PROXY_USER },
{ PY_FILES },
{ QUEUE },
{ REPOSITORIES },
{ STATUS },
{ TOTAL_EXECUTOR_CORES },
};
/**
* List of switches (command line options that do not take parameters) recognized by spark-submit.
*/
final String[][] switches = {
{ HELP, "-h" },
{ SUPERVISE },
{ VERBOSE, "-v" },
{ VERSION },
};
/**
* Parse a list of spark-submit command line options.
* <p/>
* See SparkSubmitArguments.scala for a more formal description of available options.
*
* @throws IllegalArgumentException If an error is found during parsing.
*/
protected final void parse(List<String> args) {
Pattern eqSeparatedOpt = Pattern.compile("(--[^=]+)=(.+)");
int idx = 0;
for (idx = 0; idx < args.size(); idx++) {
String arg = args.get(idx);
String value = null;
Matcher m = eqSeparatedOpt.matcher(arg);
if (m.matches()) {
arg = m.group(1);
value = m.group(2);
}
// Look for options with a value.
String name = findCliOption(arg, opts);
if (name != null) {
if (value == null) {
if (idx == args.size() - 1) {
throw new IllegalArgumentException(
String.format("Missing argument for option '%s'.", arg));
}
idx++;
value = args.get(idx);
}
if (!handle(name, value)) {
break;
}
continue;
}
// Look for a switch.
name = findCliOption(arg, switches);
if (name != null) {
if (!handle(name, null)) {
break;
}
continue;
}
if (!handleUnknown(arg)) {
break;
}
}
if (idx < args.size()) {
idx++;
}
handleExtraArgs(args.subList(idx, args.size()));
}
/**
* Callback for when an option with an argument is parsed.
*
* @param opt The long name of the cli option (might differ from actual command line).
* @param value The value. This will be <i>null</i> if the option does not take a value.
* @return Whether to continue parsing the argument list.
*/
protected boolean handle(String opt, String value) {
throw new UnsupportedOperationException();
}
/**
* Callback for when an unrecognized option is parsed.
*
* @param opt Unrecognized option from the command line.
* @return Whether to continue parsing the argument list.
*/
protected boolean handleUnknown(String opt) {
throw new UnsupportedOperationException();
}
/**
* Callback for remaining command line arguments after either {@link #handle(String, String)} or
* {@link #handleUnknown(String)} return "false". This will be called at the end of parsing even
* when there are no remaining arguments.
*
* @param extra List of remaining arguments.
*/
protected void handleExtraArgs(List<String> extra) {
throw new UnsupportedOperationException();
}
private String findCliOption(String name, String[][] available) {
for (String[] candidates : available) {
for (String candidate : candidates) {
if (candidate.equals(name)) {
return candidates[0];
}
}
}
return null;
}
}
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