Examples of com.sleepycat.db.Database.openCursor()

com.sleepycat.db.Database.openCursor()

Return a cursor into the database.

@param txn To use a cursor for writing to a transactional database, an explicit transaction must be specified. For read-only access to a transactional database, the transaction may be null. For a non-transactional database, the transaction must be null.

To transaction-protect cursor operations, cursors must be opened and closed within the context of a transaction, and the txn parameter specifies the transaction context in which the cursor will be used.

@param config The cursor attributes. If null, default attributes are used.

@return A database cursor.

@throws DatabaseException if a failure occurs.

        }


        Cursor cursor = null;
        int nWritten = 0;
        try {
            cursor = db.openCursor(txn, cursorConfig);
            OperationStatus status = cursor.getFirst(key, data, null);
            while (status == OperationStatus.SUCCESS) {
                boolean oneWritten = false;
                if (evolveNeeded(key, data, binding)) {
                    cursor.putCurrent(data);

                    cursor.close();
                    cursor = null;
                    txn.commit();
                    txn = null;
                    txn = env.beginTransaction(null, null);
                    cursor = db.openCursor(txn, cursorConfig);
                    DatabaseEntry saveKey = KeyRange.copy(key);
                    status = cursor.getSearchKeyRange(key, data, null);
                    if (status == OperationStatus.SUCCESS &&
                        KeyRange.equalBytes(key, saveKey)) {
                        status = cursor.getNext(key, data, null);


      TestUtils.DEBUGOUT("Put: " + (char)outbuf[0] + ": " + new String(outbuf, 0, i));
      db.putNoOverwrite(null, key, data);


      // Acquire a cursor for the table.
      Cursor dbcp = db.openCursor(null, CursorConfig.DEFAULT);


      // Walk through the table, checking
      DatabaseEntry readkey = new DatabaseEntry();
      DatabaseEntry readdata = new DatabaseEntry();
      DatabaseEntry whoknows = new DatabaseEntry();

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