Android Open Source - interdroid-vdb Vdb Repository Registry

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The source code is released under:
Copyright (c) 2008-2012 Vrije Universiteit, The Netherlands All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the follo...
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Java Source Code

/*
 * Copyright (c) 2008-2012 Vrije Universiteit, The Netherlands All rights
 * reserved.//from   w w  w.  j a v a  2 s.  c  o m
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the Vrije Universiteit nor the names of its contributors
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package interdroid.vdb.persistence.api;

import interdroid.util.FSUtil;
import interdroid.vdb.content.VdbProviderRegistry;
import interdroid.vdb.persistence.impl.VdbRepositoryImpl;

import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

//import org.eclipse.jgit.transport.SshConfigSessionFactory;
//import org.eclipse.jgit.transport.SshSessionFactory;
//import org.eclipse.jgit.transport.OpenSshConfig.Host;
import org.eclipse.jgit.lib.Repository;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

//import com.jcraft.jsch.Session;

import android.content.Context;

/**
 * The registry for repositories known to VDB.
 *
 * @author nick &lt;palmer@cs.vu.nl&gt;
 *
 */
public final class VdbRepositoryRegistry {
  /**
   * Access to logger.
   */
  private static final Logger LOG = LoggerFactory
      .getLogger(VdbRepositoryRegistry.class);

  /**
   * The singleton of this in the sytem.
   */
  private static final VdbRepositoryRegistry SINGLETON =
      new VdbRepositoryRegistry();

  /**
   * Prevent construction.
   */
  private VdbRepositoryRegistry() {
//        // disable strict host checking for push/pull ssh connections
//        SshSessionFactory.setInstance( new SshConfigSessionFactory() {
//            @Override
//            protected void configure(Host hc, Session session)
//            {
//                session.setConfig("StrictHostKeyChecking", "no");
//            }
//        });
  }

  /**
   * @return the instance of the registry.
   */
  public static VdbRepositoryRegistry getInstance() {
    return SINGLETON;
  }

  /**
   * The repositories known to this instance.
   */
  private Map<String, VdbRepositoryImpl> mRepositories
    = new HashMap<String, VdbRepositoryImpl>();

  /**
   * Adds the repository to the registry and constructs it.
   * @param context the context the add is being done in
   * @param repositoryName the name of the repository
   * @param initializer the initializer for the repository
   * @return the constructed repository
   * @throws IOException if reading or writing fails.
   */
  public synchronized VdbRepository addRepository(final Context context,
      final String repositoryName, final VdbInitializer initializer)
  throws IOException {
    LOG.debug("Adding repo: {}", repositoryName);

    VdbRepositoryImpl repo;
    if (mRepositories.containsKey(repositoryName)) {
      repo = mRepositories.get(repositoryName);
    } else {
      File repoDir = getRepositoryDir(context, repositoryName);
      // If it does not exist, it will be initialized
      repo = new VdbRepositoryImpl(repositoryName,
          repoDir, initializer);
      mRepositories.put(repositoryName, repo);
    }
    return repo;
  }

  /**
   * Returns the directory for a repository.
   *
   * @param context The context to work in
   * @param repositoryName the name of the repo
   * @return the repository directory as a File.
   */
  private static File getRepositoryDir(final Context context,
      final String repositoryName) {
    File repoDir = context.getDir("git-" + repositoryName,
        Context.MODE_WORLD_READABLE | Context.MODE_WORLD_WRITEABLE);
    return repoDir;
  }

  /**
   * Returns a repository with the given name.
   * @param context the context being requested from
   * @param repositoryName the name of the repository
   * @return the requested repository
   * @throws IOException if reading or writing fails
   */
  public synchronized VdbRepository getRepository(final Context context,
      final String repositoryName) throws IOException {
    if (LOG.isDebugEnabled()) {
      LOG.debug("Getting repository: {} : {}", repositoryName,
          mRepositories.size());
    }
    // Make sure the repository has been initialized.
    new VdbProviderRegistry(context).initByName(repositoryName);
    if (LOG.isDebugEnabled()) {
      for (String repo : mRepositories.keySet()) {
        LOG.debug("Repo: {}", repo);
      }
    }
    return mRepositories.get(repositoryName);
  }

  /**
   * Returns the underlying jGit repository for the repository with the given
   * name.
   * @param context the context being requested in
   * @param name the name of the desired repository
   * @return the jGit Repository
   * @throws IOException if reading or writing fail
   */
  public Repository getJGitRepository(final Context context,
      final String name) throws IOException {
    VdbRepository repo = getRepository(context, name);
    if (repo != null) {
      return ((VdbRepositoryImpl) repo).getGitRepository();
    }
    return null;
  }

  /**
   * Delete a repository.
   * @param context the context to work in
   * @param string the name of the repo to delete.
   */
  public void deleteRepository(final Context context, String string) {
    LOG.debug("Removing repo: {}", string);
    VdbRepositoryImpl impl = mRepositories.remove(string);
    // Make sure to close the db.
    if (impl != null) {
      impl.close();
    }
    File repoDir = getRepositoryDir(context, string);
    LOG.debug("Removing directory: {}", repoDir);
    LOG.debug("Removed: {}", FSUtil.removeDirectory(repoDir));
  }
}
Java Source Code List
