edu.ubc.mirrors.equinoxonhadoop.ToolFromEquinox.java Source code

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Here is the source code for edu.ubc.mirrors.equinoxonhadoop.ToolFromEquinox.java

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/*******************************************************************************
 * Copyright (c) 2013 Robin Salkeld
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 ******************************************************************************/
package edu.ubc.mirrors.equinoxonhadoop;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.ServiceLoader;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.BundleException;
import org.osgi.framework.Constants;
import org.osgi.framework.ServiceReference;
import org.osgi.framework.launch.Framework;
import org.osgi.framework.launch.FrameworkFactory;
import org.osgi.framework.wiring.BundleRevision;

public class ToolFromEquinox implements Tool {

    private Tool wrappedTool;

    @Override
    public void setConf(Configuration config) {
        Framework framework = createFramework(config);
        wrappedTool = loadFromFramework(framework, Tool.class);
        wrappedTool.setConf(config);

        ClassLoader osgiLoader = wrappedTool.getClass().getClassLoader();
        config.setClassLoader(osgiLoader);
        Thread.currentThread().setContextClassLoader(osgiLoader);
    }

    @Override
    public Configuration getConf() {
        return wrappedTool.getConf();
    }

    @Override
    public int run(String[] args) throws Exception {
        return wrappedTool.run(args);
    }

    public Framework createFramework(Configuration config) {
        Map<String, String> frameworkConfig = new HashMap<String, String>();

        // TODO-RS: We should be able to remove sun.misc?
        frameworkConfig.put(Constants.FRAMEWORK_BOOTDELEGATION, "org.apache.hadoop.*,sun.misc,sun.reflect");
        frameworkConfig.put(Constants.FRAMEWORK_BUNDLE_PARENT, Constants.FRAMEWORK_BUNDLE_PARENT_APP);
        frameworkConfig.put(Constants.FRAMEWORK_STORAGE,
                "/Users/robinsalkeld/Documents/UBC/Code/Retrospect/EquinoxOnHadoop/eclipse");
        frameworkConfig.put(Constants.FRAMEWORK_STORAGE_CLEAN, "true");
        frameworkConfig.put("osgi.install.area",
                "/Users/robinsalkeld/Documents/UBC/Code/Retrospect/EquinoxOnHadoop/eclipse");
        //        frameworkConfig.put("osgi.console", "true");

        FrameworkFactory factory = ServiceLoader.load(FrameworkFactory.class).iterator().next();
        Framework framework = factory.newFramework(frameworkConfig);
        try {
            framework.start();
        } catch (BundleException e) {
            throw new RuntimeException(e);
        }

        InputStream in = ToolFromEquinox.class.getResourceAsStream("/bundles.txt");
        BufferedReader br = new BufferedReader(new InputStreamReader(in));
        List<Bundle> bundles = new ArrayList<Bundle>();
        String line;
        try {
            while ((line = br.readLine()) != null) {
                bundles.add(framework.getBundleContext().installBundle("reference:file:" + line));
            }

            for (Bundle bundle : bundles) {
                if (!bundleIsFragment(bundle)) {
                    bundle.start();
                }
            }
        } catch (IOException e) {
            throw new RuntimeException(e);
        } catch (BundleException e) {
            throw new RuntimeException(e);
        }

        return framework;
    }

    private boolean bundleIsFragment(Bundle bundle) {
        return (bundle.adapt(BundleRevision.class).getTypes() & BundleRevision.TYPE_FRAGMENT) != 0;
    }

    public <T> T loadFromFramework(Framework framework, Class<? extends T> klass) {
        BundleContext bundleContext = framework.getBundleContext();
        ServiceReference<? extends T> ref = bundleContext.getServiceReference(klass);
        return klass.cast(bundleContext.getService(ref));
    }

    public static void main(String[] args) throws Exception {
        int res = -1;
        try {
            res = ToolRunner.run(new Configuration(), new ToolFromEquinox(), args);
        } catch (Exception e) {
            e.printStackTrace();
        }
        System.exit(res);
    }
}