Examples of org.syncany.database.MemoryDatabase

org.syncany.database.MemoryDatabase
The database represents the internal file and chunk index of the application. It can be used to reference or load a full local database (local client) or a remote database (from a delta database file of another clients).
A database consists of a sorted list of {@link DatabaseVersion}s, i.e. it is a collection of changes to the local file system.
For convenience, the class also offers a set of functionality to select objects from the current accumulated database. Examples include {@link #getChunk(byte[]) getChunk()}, {@link #getContent(byte[]) getContent()} and {@link #getMultiChunk(byte[]) getMultiChunk()}.
To allow this convenience, a few caches are kept in memory, and updated whenever a database version is added or removed. @see DatabaseVersion @author Philipp C. Heckel


    // Add dirty data (if existent)
    addDirtyData(deltaDatabaseVersion);


    // New delta database
    MemoryDatabase deltaDatabase = new MemoryDatabase();
    deltaDatabase.addDatabaseVersion(deltaDatabaseVersion);


    // Save delta database locally
    long newestLocalDatabaseVersion = deltaDatabaseVersion.getVectorClock().getClock(config.getMachineName());
    DatabaseRemoteFile remoteDeltaDatabaseFile = new DatabaseRemoteFile(config.getMachineName(), newestLocalDatabaseVersion);
    File localDeltaDatabaseFile = config.getCache().getDatabaseFile(remoteDeltaDatabaseFile.getName());

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    // Read database files
    DatabaseBranches unknownRemoteBranches = new DatabaseBranches();


    for (Map.Entry<File, DatabaseRemoteFile> remoteDatabaseFileEntry : remoteDatabases.entrySet()) {
      MemoryDatabase remoteDatabase = new MemoryDatabase(); // Database cannot be reused, since these might be different clients


      File remoteDatabaseFileInCache = remoteDatabaseFileEntry.getKey();
      DatabaseRemoteFile remoteDatabaseFile = remoteDatabaseFileEntry.getValue();
      
      databaseSerializer.load(remoteDatabase, remoteDatabaseFileInCache, null, null, DatabaseReadType.HEADER_ONLY, null, null); // only load headers!
      List<DatabaseVersion> remoteDatabaseVersions = remoteDatabase.getDatabaseVersions();


      // Populate branches
      DatabaseBranch remoteClientBranch = unknownRemoteBranches.getBranch(remoteDatabaseFile.getClientName(), true);


      for (DatabaseVersion remoteDatabaseVersion : remoteDatabaseVersions) {

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      logger.log(Level.WARNING, "  + Nothing to update. Nice!");
      result.setResultCode(DownResultCode.OK_NO_REMOTE_CHANGES);
    }
    else {      
      logger.log(Level.INFO, "Loading winners database (PURGE) ...");      
      MemoryDatabase winnersPurgeDatabase = readWinnersDatabase(winnersApplyBranch, databaseFileList, DatabaseVersionType.PURGE, null);
      Map<FileHistoryId, FileVersion> ignoredMostRecentPurgeVersions = extractMostRecentPurgeVersions(winnersPurgeDatabase.getFileHistories());
      
      logger.log(Level.INFO, "Loading winners database (DEFAULT) ...");      
      MemoryDatabase winnersDatabase = readWinnersDatabase(winnersApplyBranch, databaseFileList, DatabaseVersionType.DEFAULT, ignoredMostRecentPurgeVersions);
      
      if (options.isApplyChanges()) {
        new ApplyChangesOperation(config, localDatabase, transferManager, winnersDatabase, result).execute();
      }
      else {

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   * @return Returns a loaded memory database containing all metadata from the winner's branch 
   */
  private MemoryDatabase readWinnersDatabase(DatabaseBranch winnersApplyBranch, DatabaseFileList databaseFileList,
      DatabaseVersionType filterType, Map<FileHistoryId, FileVersion> ignoredMostRecentPurgeVersions) throws IOException, StorageException {


    MemoryDatabase winnerBranchDatabase = new MemoryDatabase(); 


    List<DatabaseVersionHeader> winnersApplyBranchList = winnersApplyBranch.getAll();
    
    String rangeClientName = null;
    VectorClock rangeVersionFrom = null;

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        if (hasMuddyDatabaseVersionHeaders) {
          logger.log(Level.INFO, "DIRTY database version headers of "+ otherClientName + ":  " +otherMuddyDatabaseVersionHeaders);
  
          for (DatabaseVersionHeader muddyDatabaseVersionHeader : otherMuddyDatabaseVersionHeaders) {
            MemoryDatabase muddyMultiChunksDatabase = new MemoryDatabase();
            
            File localFileForMuddyDatabaseVersion = databaseFileList.getNextDatabaseVersionFile(muddyDatabaseVersionHeader);
            VectorClock fromVersion = muddyDatabaseVersionHeader.getVectorClock();
            VectorClock toVersion = muddyDatabaseVersionHeader.getVectorClock();
            
            logger.log(Level.INFO, "  - Loading " + muddyDatabaseVersionHeader + " from file " + localFileForMuddyDatabaseVersion);
            databaseSerializer.load(muddyMultiChunksDatabase, localFileForMuddyDatabaseVersion, fromVersion, toVersion, DatabaseReadType.FULL, DatabaseVersionType.DEFAULT, null);
            
            boolean hasMuddyMultiChunks = muddyMultiChunksDatabase.getMultiChunks().size() > 0;
            
            if (hasMuddyMultiChunks) {
              muddyMultiChunksPerDatabaseVersion.put(muddyDatabaseVersionHeader, muddyMultiChunksDatabase.getMultiChunks());
            }
          }
          
        }
      }

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public class RestoreFileSystemAction extends FileCreatingFileSystemAction {
  private String relativeTargetPath;
  
  public RestoreFileSystemAction(Config config, FileVersion fileVersion, String relativeTargetPath) {
    super(config, new MemoryDatabase(), null, fileVersion);
    this.relativeTargetPath = relativeTargetPath;
  }

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    return branch;
  }
  
  public static MemoryDatabase readDatabaseFileFromDisk(File databaseFile, Transformer transformer) throws IOException {
    MemoryDatabase db = new MemoryDatabase();
    
    DatabaseXmlSerializer dao = new DatabaseXmlSerializer(transformer);
    dao.load(db, databaseFile, null, null, DatabaseReadType.FULL, DatabaseVersionType.DEFAULT, null);
    
    return db;

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org.syncany.operations.restore.RestoreFileSystemAction

org.syncany.operations.up.UpOperation

org.syncany.tests.database.MemoryDatabaseCacheTest

org.syncany.tests.operations.FileSystemActionReconciliatorTest

org.syncany.tests.operations.SyncUpOperationTest

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org.syncany.tests.util.TestDatabaseUtil

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