org.age.console.command.TestCommand.java Source code

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Here is the source code for org.age.console.command.TestCommand.java

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/*
 * Copyright (C) 2014 Intelligent Information Systems Group.
 *
 * This file is part of AgE.
 *
 * AgE is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * AgE is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with AgE.  If not, see <http://www.gnu.org/licenses/>.
 */
/*
 * Created: 2014-10-16
 */

package org.age.console.command;

import static com.google.common.base.MoreObjects.toStringHelper;
import static com.google.common.base.Strings.isNullOrEmpty;

import org.age.services.worker.WorkerMessage;

import com.beust.jcommander.JCommander;
import com.beust.jcommander.Parameter;
import com.beust.jcommander.Parameters;
import com.google.common.collect.ImmutableSet;
import com.google.common.reflect.ClassPath;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.core.ITopic;

import jline.console.ConsoleReader;

import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
import org.checkerframework.checker.nullness.qual.NonNull;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Scope;

import java.io.IOException;
import java.io.PrintWriter;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.concurrent.TimeUnit;

import javax.annotation.PostConstruct;
import javax.inject.Inject;
import javax.inject.Named;

/**
 * Command that eases testing the cluster.
 */
@Named
@Scope("prototype")
@Parameters(commandNames = "test", commandDescription = "Run sample computations", optionPrefixes = "--")
public class TestCommand implements Command {

    private static final String EXAMPLES_PACKAGE = "org.age.example";

    private static final Logger log = LoggerFactory.getLogger(TestCommand.class);

    @Inject
    private HazelcastInstance hazelcastInstance;

    @Parameter(names = "--list-examples")
    private boolean listExamples;

    @Parameter(names = "--example")
    private String example;

    @Parameter(names = "--config")
    private String config;

    @MonotonicNonNull
    private ITopic<WorkerMessage<?>> topic;

    @PostConstruct
    private void construct() {
        topic = hazelcastInstance.getTopic("worker/channel");
    }

    @Override
    public boolean execute(final @NonNull JCommander commander, final @NonNull ConsoleReader reader,
            final @NonNull PrintWriter printWriter) {
        if (listExamples) {
            listExamples(printWriter);
        } else if (!isNullOrEmpty(example)) {
            runExample();
        } else if (!isNullOrEmpty(config)) {
            runConfig(printWriter);
        }
        return true;
    }

    private static void listExamples(final @NonNull PrintWriter printWriter) {
        log.debug("Listing examples.");
        try {
            final ClassPath classPath = ClassPath.from(TestCommand.class.getClassLoader());
            final ImmutableSet<ClassPath.ClassInfo> classes = classPath.getTopLevelClasses(EXAMPLES_PACKAGE);
            log.debug("Class path {}.", classes);
            classes.forEach(klass -> printWriter.println(klass.getSimpleName()));
        } catch (final IOException e) {
            log.error("Cannot load classes.", e);
            printWriter.println("Error: Cannot load classes.");
        }
    }

    private void runExample() {
        log.debug("Running example.");
        final String className = EXAMPLES_PACKAGE + '.' + example;

        topic.publish(WorkerMessage.createBroadcastWithPayload(WorkerMessage.Type.LOAD_CLASS, className));
        try {
            TimeUnit.SECONDS.sleep(1L);
        } catch (final InterruptedException e) {
            log.debug("Interrupted.", e);
        }
        topic.publish(WorkerMessage.createBroadcastWithoutPayload(WorkerMessage.Type.START_COMPUTATION));
    }

    private void runConfig(final @NonNull PrintWriter printWriter) {
        log.debug("Running config.");
        final Path path = Paths.get(config);
        if (!Files.exists(path)) {
            printWriter.println("File " + config + " does not exist.");
            return;
        }
        topic.publish(WorkerMessage.createBroadcastWithPayload(WorkerMessage.Type.LOAD_CONFIGURATION,
                path.normalize().toString()));
        try {
            TimeUnit.SECONDS.sleep(1L);
        } catch (final InterruptedException e) {
            log.debug("Interrupted.", e);
        }
        topic.publish(WorkerMessage.createBroadcastWithoutPayload(WorkerMessage.Type.START_COMPUTATION));
    }

    @Override
    public String toString() {
        return toStringHelper(this).toString();
    }
}