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.

        txn = txnBeginCursor();


        Cursor priCursor = null;
        SecondaryCursor secCursor = null;
        try {
            priCursor = priDb.openCursor(txn, null);
            secCursor = secDb.openSecondaryCursor(txn, null);


            /* Cursor.putNoOverwrite() */
            status = priCursor.putNoOverwrite(entry(1), entry(2));
            assertSame(OperationStatus.SUCCESS, status);

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                                               entry(NUM_RECS), data,
                                               LockMode.DEFAULT);
            assertSame(OperationStatus.NOTFOUND, status);


            /* Add one duplicate for each key. */
            Cursor priCursor = priDb.openCursor(txn, null);
            try {
                for (int i = 0; i < NUM_RECS; i += 1) {
                    status = priCursor.put(entry(i + KEY_OFFSET), entry(i));
                    assertSame(OperationStatus.SUCCESS, status);
                }

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        /* Cursor operations. */


        txnCommit(txn);
        txn = txnBeginCursor();
        Cursor cursor = priDb.openCursor(txn, null);
        SecondaryCursor secCursor = secDb.openSecondaryCursor(txn, null);


        assertEquals(OperationStatus.SUCCESS,
                     cursor.getSearchKey(key, found, null));
        assertEquals(OperationStatus.SUCCESS,

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        assertEquals(OperationStatus.SUCCESS,
                     priDb.put(txn, key, data));


        txnCommit(txn);
        txn = txnBeginCursor();
        Cursor cursor = priDb.openCursor(txn, null);
        SecondaryCursor secCursor = secDb.openSecondaryCursor(txn, null);


        /* Check the uninitialized state for certain operations. */


        try {

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        dbConfig.setSortedDuplicates(true);
        dbConfig.setReadOnly(true);
        for (int d = startDb; d < endDb; d++) {
            Database checkDb = env.openDatabase(null, DB_NAME + d,
            dbConfig);
            Cursor myCursor = checkDb.openCursor(null, null);
            DatabaseEntry key = new DatabaseEntry();
            DatabaseEntry data = new DatabaseEntry();
            OperationStatus status =
    myCursor.getFirst(key, data, LockMode.DEFAULT);
            DbInternal.envGetEnvironmentImpl(env).verifyCursors();

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  }
        dbConfig.setSortedDuplicates(true);
  dbConfig.setTransactional(true);
        for (int d = 0; d < numDbs; d++) {
            Database checkDb = env.openDatabase(null, DB_NAME + d, dbConfig);
            Cursor myCursor = checkDb.openCursor(null, null);
            DatabaseEntry key = new DatabaseEntry();
            DatabaseEntry data = new DatabaseEntry();


            OperationStatus status =
    myCursor.getFirst(key, data, LockMode.DEFAULT);

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        DatabaseConfig dbConfig = new DatabaseConfig();
        dbConfig.setAllowCreate(true);
        Database myDb = exampleEnv.openDatabase(null, "fooDb", dbConfig);


  myDb.put(null, new StringDbt("blah"), new StringDbt("blort"));
  Cursor cursor = myDb.openCursor(null, null);
  OperationStatus status = cursor.getNext(new DatabaseEntry(),
                                                new DatabaseEntry(),
                                                LockMode.DEFAULT);
  Cursor cursorDup = cursor.dup(true);
  cursor.close();

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        DatabaseConfig dbConfig = new DatabaseConfig();
        dbConfig.setAllowCreate(true);
        Database myDb = exampleEnv.openDatabase(null, "fooDb", dbConfig);


        /* Open uninitialized cursor. */
        Cursor c1 = myDb.openCursor(null, null);
        try {
            c1.getCurrent(new DatabaseEntry(), new DatabaseEntry(), null);
            fail();
        } catch (DatabaseException expected) {}

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        DatabaseConfig dbConfig = new DatabaseConfig();
        dbConfig.setAllowCreate(false);
        dbConfig.setReadOnly(true);
        dbConfig.setSortedDuplicates(true);
        Database db = env.openDatabase(null, "db1", dbConfig);
        Cursor cursor = db.openCursor(null, null);
        DatabaseEntry key = new DatabaseEntry();
        DatabaseEntry data = new DatabaseEntry();
        OperationStatus status = cursor.getFirst(key, data, null);
        assertEquals(OperationStatus.SUCCESS, status);
        assertEquals(3, value(key));

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