How to use

OhmDBImpl

in

com.ohmdb.impl

private void importRelations(long id) {
  int relN = (Integer) decode();
  for (int i = 0; i < relN; i++) {
    String relName = (String) decode();
    RelationInternals rel = (RelationInternals) relation(relName);
    int linksN = (Integer) decode();
    for (int j = 0; j < linksN; j++) {
      long linkTo = (Long) decode();
      rel.fill(id, linkTo);
    }
  }
}

public synchronized byte[] exportRecord(long id) {
  SER_HELPER.clear();
  exportColumns(id);
  exportRelations(id);
  SER_HELPER.flip();
  byte[] bytes = new byte[SER_HELPER.limit()];
  SER_HELPER.get(bytes);
  // System.out.println("EXPORTING BYTES " + bytes.length);
  return bytes;
}

@Override
public Object read(long id) {
  return exportRecord(id);
}

private void importColumns(long id) {
  String fullName = (String) decode();
  int colN = (Integer) decode();
  Table<Object> table = table(fullName);
  TableInternals<?> table2 = (TableInternals<?>) table;
  for (int i = 0; i < colN; i++) {
    String colName = (String) decode();
    Object colVal = decode();
    table2.fill(id, colName, colVal);
  }
}

public synchronized void importRecord(long id, byte[] bytes) {
  SER_HELPER.clear();
  SER_HELPER.put(bytes);
  SER_HELPER.flip();
  boolean importTableData = (Boolean) decode();
  if (importTableData) {
    importColumns(id);
  }
  importRelations(id);
}

@SuppressWarnings("unchecked")
@Override
public <T> T get(long id) {
  return (T) address(id).table.get(id);
}

public RWRelation relation(String name) {
  return relation(null, name, null);
}

public OhmDBImpl() {
  super(new DefaultLinkMatcher());
  dbRef = new WeakReference<Db>(this);
  this.store = new NoDataStore(this);
  addShutdownHook();
}

@Override
public void commit(Transaction transaction) {
  Check.arg(this.transaction == transaction, "Invalid transaction!");
  db.commit();
  TransactionInternals internals = (TransactionInternals) transaction;
  internals.getStoreTx().commit();
  this.transaction = null;
  stats.commits++;
  lockManager.globalWriteUnlock();
}

public static Db newInstance(String filename) {
  Throwable err = null;
  for (int i = 0; i < 3; i++) {
    try {
      return filename != null ? new OhmDBImpl(filename) : new OhmDBImpl();
    } catch (Exception e) {
      e.printStackTrace();
      err = e;
      U.sleep(1000);
    }
  }
  throw Errors.rte("Cannot initialize the database!", err);
}

private void deleteInTx(DatastoreTransaction tx, long id) {
  insider.deleting(clazz, id);
  E entity = get_(id);
  doTriggers(beforeDelete, TriggerAction.BEFORE_DELETE, id, entity, null);
  stats.deletes++;
  int row = row(id);
  // TODO check - changelog if not deleted rels?
  db.deleteRelsInTx(id, tx); // CHANGE #1
  size--; // CHANGE #2
  deletedCount++; // CHANGE #3
  currentlyDeleted.add(row); // CHANGE #4
  idColl.delete(id); // CHANGE #5
  ids.remove(id); // CHANGE #6
  changelog.add(TableChange.delete(id, row)); // CHANGELOG
  // TODO also delete old (renamed) columns?
  for (PropertyInfo prop : props) {
    deleteCell(tx, id, row, prop);
  }
  doTriggers(afterDelete, TriggerAction.AFTER_DELETE, id, entity, null);
  insider.deleted(clazz, id);
}

public synchronized void importRecord(long id, byte[] bytes) {
  SER_HELPER.clear();
  SER_HELPER.put(bytes);
  SER_HELPER.flip();
  boolean importTableData = (Boolean) decode();
  if (importTableData) {
    importColumns(id);
  }
  importRelations(id);
}

private void importColumns(long id) {
  String fullName = (String) decode();
  int colN = (Integer) decode();
  Table<Object> table = table(fullName);
  TableInternals<?> table2 = (TableInternals<?>) table;
  for (int i = 0; i < colN; i++) {
    String colName = (String) decode();
    Object colVal = decode();
    table2.fill(id, colName, colVal);
  }
}

@SuppressWarnings("unchecked")
@Override
public <T> T get(long id) {
  return (T) address(id).table.get(id);
}

public RWRelation relation(String name) {
  return relation(null, name, null);
}

public OhmDBImpl() {
  super(new DefaultLinkMatcher());
  dbRef = new WeakReference<Db>(this);
  this.store = new NoDataStore(this);
  addShutdownHook();
}

@Override
public void commit(Transaction transaction) {
  Check.arg(this.transaction == transaction, "Invalid transaction!");
  db.commit();
  TransactionInternals internals = (TransactionInternals) transaction;
  internals.getStoreTx().commit();
  this.transaction = null;
  stats.commits++;
  lockManager.globalWriteUnlock();
}

public static Db newInstance(String filename) {
  Throwable err = null;
  for (int i = 0; i < 3; i++) {
    try {
      return filename != null ? new OhmDBImpl(filename) : new OhmDBImpl();
    } catch (Exception e) {
      e.printStackTrace();
      err = e;
      U.sleep(1000);
    }
  }
  throw Errors.rte("Cannot initialize the database!", err);
}

private void deleteInTx(DatastoreTransaction tx, long id) {
  insider.deleting(clazz, id);
  E entity = get_(id);
  doTriggers(beforeDelete, TriggerAction.BEFORE_DELETE, id, entity, null);
  stats.deletes++;
  int row = row(id);
  // TODO check - changelog if not deleted rels?
  db.deleteRelsInTx(id, tx); // CHANGE #1
  size--; // CHANGE #2
  deletedCount++; // CHANGE #3
  currentlyDeleted.add(row); // CHANGE #4
  idColl.delete(id); // CHANGE #5
  ids.remove(id); // CHANGE #6
  changelog.add(TableChange.delete(id, row)); // CHANGELOG
  // TODO also delete old (renamed) columns?
  for (PropertyInfo prop : props) {
    deleteCell(tx, id, row, prop);
  }
  doTriggers(afterDelete, TriggerAction.AFTER_DELETE, id, entity, null);
  insider.deleted(clazz, id);
}

public synchronized void importRecord(long id, byte[] bytes) {
  SER_HELPER.clear();
  SER_HELPER.put(bytes);
  SER_HELPER.flip();
  boolean importTableData = (Boolean) decode();
  if (importTableData) {
    importColumns(id);
  }
  importRelations(id);
}