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

com.sleepycat.je.Database.openCursor()
Returns a cursor into the database. @param txn the transaction used to protect all operations performed withthe cursor, or null if the operations should not be transaction protected. If the database is non-transactional, null must be specified. For a transactional database, the transaction is optional for read-only access and required for read-write access. @param cursorConfig The cursor attributes. If null, default attributesare used. @return A database cursor. @throws com.sleepycat.je.rep.DatabasePreemptedException in a replicatedenvironment if the master has truncated, removed or renamed the database. @throws OperationFailureException if this exception occurred earlier andcaused the transaction to be invalidated. @throws EnvironmentFailureException if an unexpected, internal orenvironment-wide failure occurs. @throws IllegalStateException if the database has been closed. @throws IllegalArgumentException if an invalid parameter is specified,for example, an invalid {@code CursorConfig} parameter.


                System.arraycopy(bytes, 0, cursorBytes, 0, bytes.length);


                cursorData.setPartial(true);


                cursor = blocks.openCursor(txn, null);


                if (cursor.getSearchKey(cursorKey, cursorData, null) != OperationStatus.NOTFOUND) {
                    cursor.delete();
                    advance: while (cursor.getNext(cursorKey, cursorData, null) != OperationStatus.NOTFOUND) {
                        byte[] temp = cursorKey.getData();

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                }
                txn.commit();
            }
        } else {
            /* retrieve the data */
            Cursor cursor = exampleDb.openCursor(null, null);


            while (cursor.getNext(keyEntry, dataEntry, LockMode.DEFAULT) ==
                   OperationStatus.SUCCESS) {
                System.out.println("key=" + 
                                   IntegerBinding.entryToInt(keyEntry) +

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        Database versionDb = null;
        Cursor cursor = null;
        try
        {
            versionDb = _environment.openDatabase(null, Upgrader.VERSION_DB_NAME, dbConfig);
            cursor = versionDb.openCursor(null, null);
            DatabaseEntry key = new DatabaseEntry();
            DatabaseEntry value = new DatabaseEntry();
            while (cursor.getNext(key, value, null) == OperationStatus.SUCCESS)
            {
                int version = IntegerBinding.entryToInt(key);

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        Database versionDb = null;
        Cursor cursor = null;
        try
        {
            versionDb = environment.openDatabase(null, Upgrader.VERSION_DB_NAME, dbConfig);
            cursor = versionDb.openCursor(null, null);
            DatabaseEntry key = new DatabaseEntry();
            DatabaseEntry value = new DatabaseEntry();
            while (cursor.getNext(key, value, null) == OperationStatus.SUCCESS)
            {
                int version = IntegerBinding.entryToInt(key);

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        try {
            if (verbose) {
                System.out.println("Verifying VLSN index");
            }


            cursor = db.openCursor(null, CursorConfig.READ_COMMITTED);


            DatabaseEntry key = new DatabaseEntry();
            DatabaseEntry data = new DatabaseEntry();


            /*

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    private static void preload(Environment env, String dbName)
        throws Exception {


        System.out.println("Preload starting");
        Database db = env.openDatabase(null, dbName, null);
        Cursor cursor = db.openCursor(null, null);
        try {
            DatabaseEntry key = new DatabaseEntry();
            DatabaseEntry data = new DatabaseEntry();
            int count = 0;
            while (cursor.getNext(key, data, LockMode.DEFAULT) ==

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        }
        dupSort = db.getConfig().getSortedDuplicates();


        printHeader(outputFile, dupSort, formatUsingPrintable);


        Cursor cursor = db.openCursor(null, null);
        while (cursor.getNext(foundKey, foundData, LockMode.DEFAULT) ==
               OperationStatus.SUCCESS) {
            dumpOne(outputFile, foundKey.getData(), formatUsingPrintable);
            dumpOne(outputFile, foundData.getData(), formatUsingPrintable);
        }

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        }


        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);

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                    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);

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                System.arraycopy(bytes, 0, cursorBytes, 0, bytes.length);


                cursorData.setPartial(true);


                cursor = blocks.openCursor(txn, null);


                if (cursor.getSearchKey(cursorKey, cursorData, null) != OperationStatus.NOTFOUND) {
                    cursor.delete();
                    advance: while (cursor.getNext(cursorKey, cursorData, null) != OperationStatus.NOTFOUND) {
                        byte[] temp = cursorKey.getData();

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