com.twosigma.beakerx.scala.magic.command.SparkMagicCommandOptions.java Source code

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Here is the source code for com.twosigma.beakerx.scala.magic.command.SparkMagicCommandOptions.java

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/*
 *  Copyright 2018 TWO SIGMA OPEN SOURCE, LLC
 *
 *  Licensed 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 com.twosigma.beakerx.scala.magic.command;

import org.apache.commons.cli.BasicParser;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.ParseException;

import java.util.ArrayList;
import java.util.List;

import static com.twosigma.beakerx.scala.magic.command.SparkOptions.START;

public class SparkMagicCommandOptions {

    private SparkOptions sparkOptions;
    private SparkMagicActionOptions sparkMagicCommand;

    public SparkMagicCommandOptions(SparkMagicActionOptions sparkMagicCommand) {
        this.sparkMagicCommand = sparkMagicCommand;
        this.sparkOptions = new SparkOptions();
    }

    public OptionsResult parseOptions(String[] args) {
        CommandLineParser parser = new BasicParser();
        List<SparkMagicCommand.SparkOptionCommand> commands = new ArrayList<>();
        try {
            CommandLine cmd = parser.parse(sparkOptions.getOptions(), args);
            if (cmd.hasOption(START)) {
                commands.add((sparkUI, parent) -> sparkMagicCommand.connectToSparkSession(sparkUI, parent));
            }
        } catch (ParseException e) {
            return new ErrorOptionsResult(e.getMessage());
        }
        return new SparkOptionsResult(commands);
    }

    public interface OptionsResult {
        boolean hasError();

        String errorMsg();

        List<SparkMagicCommand.SparkOptionCommand> options();
    }

    private class ErrorOptionsResult implements OptionsResult {
        private String error;

        public ErrorOptionsResult(String error) {
            this.error = error;
        }

        @Override
        public boolean hasError() {
            return true;
        }

        @Override
        public String errorMsg() {
            return error;
        }

        @Override
        public List<SparkMagicCommand.SparkOptionCommand> options() {
            return new ArrayList<>();
        }
    }

    private class SparkOptionsResult implements OptionsResult {
        private List<SparkMagicCommand.SparkOptionCommand> sparkOptions;

        public SparkOptionsResult(List<SparkMagicCommand.SparkOptionCommand> sparkOptions) {
            this.sparkOptions = sparkOptions;
        }

        @Override
        public boolean hasError() {
            return false;
        }

        @Override
        public String errorMsg() {
            return "";
        }

        @Override
        public List<SparkMagicCommand.SparkOptionCommand> options() {
            return sparkOptions;
        }
    }
}