boa.evaluator.BoaEvaluator.java Source code

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Here is the source code for boa.evaluator.BoaEvaluator.java

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/*
 * Copyright 2017, Hridesh Rajan, Robert Dyer,
 *                 Iowa State University of Science and Technology
 *                 and Bowling Green State University
 *
 * 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 boa.evaluator;

import java.io.File;
import java.io.IOException;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.UUID;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.PosixParser;
import org.apache.commons.io.FileUtils;

import boa.BoaMain;
import boa.compiler.BoaCompiler;
import boa.datagen.DefaultProperties;
import boa.datagen.util.FileIO;

/**
 * The main entry point for Boa REPL.
 *
 * @author hridesh
 * @author rdyer
 */
public class BoaEvaluator extends BoaMain {
    private final String PROG_PATH;
    private final String DATA_PATH;
    private final String COMPILATION_DIR;
    private final String OUTPUT_DIR;

    public BoaEvaluator(final String prog, final String data) throws IOException {
        this(prog, data, System.getProperty("java.io.tmpdir") + File.separator + UUID.randomUUID().toString());
    }

    public BoaEvaluator(final String prog, final String data, final String outDir) throws IOException {
        this.PROG_PATH = prog;
        this.DATA_PATH = data;
        this.COMPILATION_DIR = "./compile"; // can not customize to be user defined because of classpath issues
        this.OUTPUT_DIR = outDir;

        setup();
    }

    public static void main(final String[] args) {
        final Options options = new Options();

        options.addOption("i", "input", true, "input Boa source file (*.boa)");
        options.addOption("d", "data", true, "path to local data directory");
        options.addOption("o", "output", true, "output directory");

        options.getOption("i").setRequired(true);
        options.getOption("d").setRequired(true);

        try {
            if (args.length == 0) {
                printHelp(options, null);
                return;
            } else {
                final CommandLine cl = new PosixParser().parse(options, args);

                if (cl.hasOption('i') && cl.hasOption('d')) {
                    final BoaEvaluator evaluator;
                    try {
                        if (cl.hasOption('o')) {
                            evaluator = new BoaEvaluator(cl.getOptionValue('i'), cl.getOptionValue('d'),
                                    cl.getOptionValue('o'));
                        } else {
                            evaluator = new BoaEvaluator(cl.getOptionValue('i'), cl.getOptionValue('d'));
                        }
                    } catch (final IOException e) {
                        System.err.print(e);
                        return;
                    }

                    if (!evaluator.compile()) {
                        System.err.println("Compilation Failed");
                        return;
                    }

                    final long start = System.currentTimeMillis();
                    evaluator.evaluate();
                    final long end = System.currentTimeMillis();

                    System.out.println("Total Time Taken: " + (end - start));
                    System.out.println(evaluator.getResults());
                } else {
                    printHelp(options, "missing required options: -i <arg> and -d <arg>");
                    return;
                }
            }
        } catch (final org.apache.commons.cli.ParseException e) {
            printHelp(options, e.getMessage());
        }
    }

    public void evaluate() {
        final String[] actualArgs = createHadoopProgramArguments();
        final File srcDir = new File(this.COMPILATION_DIR);

        try {
            final URL srcDirUrl = srcDir.toURI().toURL();

            final ClassLoader cl = new URLClassLoader(new URL[] { srcDirUrl }, ClassLoader.getSystemClassLoader());
            final Class<?> cls = cl.loadClass("boa." + jarToClassname(this.PROG_PATH));
            final Method method = cls.getMethod("main", String[].class);

            method.invoke(null, (Object) actualArgs);
        } catch (final Throwable e) {
            System.err.print(e);
        }
    }

    public String getResults() {
        for (final File f : new File(this.OUTPUT_DIR).listFiles()) {
            if (f.getName().startsWith("part")) {
                return FileIO.readFileContents(f);
            }
        }

        return "";
    }

    private boolean compile() {
        try {
            BoaCompiler.main(createCompilerArguments());
        } catch (final Exception e) {
            System.err.print(e);
            return false;
        }

        return true;
    }

    private String[] createCompilerArguments() {
        final String[] compilationArgs = new String[6];

        compilationArgs[0] = "-i";
        compilationArgs[1] = this.PROG_PATH;
        compilationArgs[2] = "-j";
        compilationArgs[3] = "./dist/boa-runtime.jar";
        compilationArgs[4] = "-cd";
        compilationArgs[5] = this.COMPILATION_DIR;

        return compilationArgs;
    }

    private String[] createHadoopProgramArguments() {
        final String[] actualArgs = new String[3];

        actualArgs[0] = this.DATA_PATH;
        actualArgs[1] = this.OUTPUT_DIR;
        actualArgs[2] = "-b"; // blocking call

        return actualArgs;
    }

    /**
     * Performs some initial setup steps like
     * 1. makes sure that output directory does not already exist
     * 2. makes sure that compilation directory exists
     */
    private void setup() throws IOException {
        final File compilationDir = new File(this.COMPILATION_DIR);

        // output directory already exists, remove it
        if (this.OUTPUT_DIR != null) {
            final File outputDir = new File(this.OUTPUT_DIR);

            if (outputDir.exists()) {
                System.err.print("output directory '" + this.OUTPUT_DIR + "' exists - delete? [Y/n] ");
                int b = (char) System.in.read();
                char ch = (char) b;

                if (b == -1 || ch == 'Y' || ch == 'y' || ch == '\n' || ch == '\r') {
                    FileUtils.deleteDirectory(outputDir);
                } else {
                    throw new RuntimeException("Please remove or provide a different output directory.");
                }
            }
        }

        // compilation directory already exists, remove it
        if (compilationDir.exists()) {
            FileUtils.deleteDirectory(compilationDir);
        }

        // compilation directory must exist
        // for now only absolute paths are supported
        //TODO: support for relative path directory support
        compilationDir.mkdirs();

        // set localData path in Defaultproperties
        DefaultProperties.localDataPath = this.DATA_PATH;
    }
}