com.moss.appkeep.tools.cache.SimpleAppkeepComponentCache.java Source code

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Here is the source code for com.moss.appkeep.tools.cache.SimpleAppkeepComponentCache.java

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/**
 * Copyright (C) 2013, Moss Computing Inc.
 *
 * This file is part of appkeep.
 *
 * appkeep 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 2, or (at your option)
 * any later version.
 *
 * appkeep 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 appkeep; see the file COPYING.  If not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 *
 * Linking this library statically or dynamically with other modules is
 * making a combined work based on this library.  Thus, the terms and
 * conditions of the GNU General Public License cover the whole
 * combination.
 *
 * As a special exception, the copyright holders of this library give you
 * permission to link this library with independent modules to produce an
 * executable, regardless of the license terms of these independent
 * modules, and to copy and distribute the resulting executable under
 * terms of your choice, provided that you also meet, for each linked
 * independent module, the terms and conditions of the license of that
 * module.  An independent module is a module which is not derived from
 * or based on this library.  If you modify this library, you may extend
 * this exception to your version of the library, but you are not
 * obligated to do so.  If you do not wish to do so, delete this
 * exception statement from your version.
 */
package com.moss.appkeep.tools.cache;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.regex.Pattern;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.moss.appkeep.api.AppkeepService;
import com.moss.appkeep.api.security.DownloadToken;
import com.moss.appkeep.api.security.SecurityException;
import com.moss.appkeep.tools.DownloadTokenFactory;
import com.moss.identity.tools.IdProovingException;
import com.moss.launch.components.Component;
import com.moss.rpcutil.proxy.hessian.HessianProxyProvider;

public class SimpleAppkeepComponentCache {
    private static final String APPKEEP_DOWNLOAD_CACHE_DIR_NAME = "appkeep-cache";

    private static final File cacheRoot() {
        final File homeDir = new File(System.getProperty("user.home"));
        final File configDir;

        if (System.getProperty("os.name").toLowerCase().contains("windows")) {
            File appDataDir = new File(homeDir, "Application Data");
            configDir = new File(appDataDir, APPKEEP_DOWNLOAD_CACHE_DIR_NAME);
            if (!configDir.exists()) {
                if (!configDir.mkdirs())
                    throw new RuntimeException("Could not create directory: " + configDir.getAbsolutePath());
            }
        } else {
            configDir = new File(homeDir, "." + APPKEEP_DOWNLOAD_CACHE_DIR_NAME);
        }

        return configDir;
    }

    private static String dirNameForUrl(String url) {
        try {
            URL u = new URL(url);
            return u.getProtocol() + "_" + u.getHost() + "_" + u.getPort() + "_"
                    + u.getPath().replaceAll(Pattern.quote("/"), "_");
        } catch (MalformedURLException e) {
            throw new RuntimeException(e);
        }
    }

    private final Log log = LogFactory.getLog(getClass());
    private final AppkeepComponentCache cache;
    private final AppkeepConnector connector;

    public SimpleAppkeepComponentCache(String url, DownloadTokenFactory tokenFactory) {
        this(new HessianProxyProvider().getProxy(AppkeepService.class, url),
                new File(cacheRoot(), dirNameForUrl(url)), tokenFactory);
    }

    SimpleAppkeepComponentCache(final AppkeepService keep, File cacheLocation,
            final DownloadTokenFactory tokenFactory) {
        cache = new AppkeepComponentCache(cacheLocation);
        this.connector = new AppkeepConnector() {
            public DownloadToken produceToken() {
                return tokenFactory.produce();
            }

            public AppkeepService keep() {
                return keep;
            }
        };
    }

    public File get(Component c) throws SecurityException, IdProovingException {
        return cache.get(c, connector);
    }

}