com.sleepycat.bind.tuple.StringBinding Java Examples

private List<String> loadVersions()
{
    final List<String> versions = new ArrayList<>();
    CursorOperation configuredObjectsCursor = new CursorOperation()
    {
        @Override
        public void processEntry(Database sourceDatabase, Database targetDatabase, Transaction transaction,
                                 DatabaseEntry key, DatabaseEntry value)
        {
            String version = StringBinding.entryToString(key);
            versions.add(version);
        }
    };
    new DatabaseTemplate(_environment, PREFERENCES_VERSION_DB_NAME, null).run(configuredObjectsCursor);
    return versions;
}
 

/**
 * Returns the id of the vector which was assigned the given internal id or null if the internal id does
 * not exist. Accesses the BDB store!
 * 
 * @param iid
 *            The internal id of the vector
 * @return The id mapped to the given internal id or null if the internal id does not exist
 */
public String getId(int iid) {
	if (iid < 0 || iid > loadCounter) {
		System.out.println("Internal id " + iid + " is out of range!");
		return null;
	}
	DatabaseEntry key = new DatabaseEntry();
	IntegerBinding.intToEntry(iid, key);
	DatabaseEntry data = new DatabaseEntry();
	if ((iidToIdDB.get(null, key, data, null) == OperationStatus.SUCCESS)) {
		return StringBinding.entryToString(data);
	} else {
		System.out.println("Internal id " + iid + " is in range but id was not found..");
		System.out.println("Index is probably corrupted");
		System.exit(0);
		return null;
	}
}
 

private void updateVersion(final Transaction txn, final String currentVersion)
{
    Database linksVersionDb = getEnvironmentFacade().openDatabase(LINKS_VERSION_DB_NAME, DEFAULT_DATABASE_CONFIG);
    DatabaseEntry key = new DatabaseEntry();
    DatabaseEntry value = new DatabaseEntry();
    StringBinding.stringToEntry(currentVersion, key);
    LongBinding.longToEntry(System.currentTimeMillis(), value);
    linksVersionDb.put(txn, key, value);
}
 

private ModelVersion getStoredVersion() throws RuntimeException
{
    try(Cursor cursor = getLinksVersionDb().openCursor(null, null))
    {
        DatabaseEntry key = new DatabaseEntry();
        DatabaseEntry value = new DatabaseEntry();

        ModelVersion storedVersion = null;
        while (cursor.getNext(key, value, LockMode.READ_UNCOMMITTED) == OperationStatus.SUCCESS)
        {
            String versionString = StringBinding.entryToString(key);
            ModelVersion version = ModelVersion.fromString(versionString);
            if (storedVersion == null || storedVersion.lessThan(version))
            {
                storedVersion = version;
            }
        }
        if (storedVersion == null)
        {
            throw new StoreException("No link version information.");
        }
        return storedVersion;
    }
    catch (RuntimeException e)
    {
        throw getEnvironmentFacade().handleDatabaseException("Cannot visit link version", e);
    }
}
 

private Database updateVersion(Transaction txn, final String currentVersion)
{
    final Database preferencesVersionDb =
            getEnvironmentFacade().openDatabase(PREFERENCES_VERSION_DB_NAME, DEFAULT_DATABASE_CONFIG);
    DatabaseEntry key = new DatabaseEntry();
    DatabaseEntry value = new DatabaseEntry();
    StringBinding.stringToEntry(currentVersion, key);
    LongBinding.longToEntry(System.currentTimeMillis(), value);
    preferencesVersionDb.put(txn, key, value);
    return preferencesVersionDb;
}
 

ModelVersion getStoredVersion()
{
    try(Cursor cursor = getPreferencesVersionDb().openCursor(null, null))
    {
        DatabaseEntry key = new DatabaseEntry();
        DatabaseEntry value = new DatabaseEntry();

        ModelVersion storedVersion = null;
        while (cursor.getNext(key, value, LockMode.READ_UNCOMMITTED) == OperationStatus.SUCCESS)
        {
            String versionString = StringBinding.entryToString(key);
            ModelVersion version = ModelVersion.fromString(versionString);
            if (storedVersion == null || storedVersion.lessThan(version))
            {
                storedVersion = version;
            }
        }
        if (storedVersion == null)
        {
            throw new StoreException("No preference version information.");
        }
        return storedVersion;
    }
    catch (RuntimeException e)
    {
        throw getEnvironmentFacade().handleDatabaseException("Cannot visit preference version", e);
    }
}
 

private void putRecord(final ReplicatedEnvironmentFacade master, final Database db, final int keyValue,
                       final String dataValue)
{
    DatabaseEntry key = new DatabaseEntry();
    DatabaseEntry data = new DatabaseEntry();

    TransactionConfig transactionConfig = new TransactionConfig();
    transactionConfig.setDurability(master.getRealMessageStoreDurability());
    Transaction txn = master.beginTransaction(transactionConfig);
    IntegerBinding.intToEntry(keyValue, key);
    StringBinding.stringToEntry(dataValue, data);

    db.put(txn, key, data);
    txn.commit();
}
 

private void populateTestData(final List<PreferenceRecord> records, final String modelVersion)
{
    EnvironmentConfig envConfig = new EnvironmentConfig();
    envConfig.setAllowCreate(true);
    envConfig.setTransactional(false);
    try (Environment environment = new Environment(_storeFile, envConfig))
    {
        DatabaseConfig dbConfig = new DatabaseConfig();
        dbConfig.setAllowCreate(true);
        try (Database versionDb = environment.openDatabase(null, "USER_PREFERENCES_VERSION", dbConfig);
             Database preferencesDb = environment.openDatabase(null, "USER_PREFERENCES", dbConfig))
        {
            DatabaseEntry key = new DatabaseEntry();
            DatabaseEntry value = new DatabaseEntry();
            UUIDTupleBinding keyBinding = UUIDTupleBinding.getInstance();
            MapBinding valueBinding = MapBinding.getInstance();
            for (PreferenceRecord record : records)
            {
                keyBinding.objectToEntry(record.getId(), key);
                valueBinding.objectToEntry(record.getAttributes(), value);
                preferencesDb.put(null, key, value);
            }

            ByteBinding.byteToEntry((byte) 0, value);
            StringBinding.stringToEntry(modelVersion, key);
            versionDb.put(null, key, value);
        }
    }
}
 

/**
 * Returns the internal id assigned to the vector with the given id or -1 if the id is not found. Accesses
 * the BDB store!
 * 
 * @param id
 *            The id of the vector
 * @return The internal id assigned to this vector or -1 if the id is not found.
 */
public int getInternalId(String id) {
	DatabaseEntry key = new DatabaseEntry();
	StringBinding.stringToEntry(id, key);
	DatabaseEntry data = new DatabaseEntry();
	// check if the id already exists in id to iid database
	if ((idToIidDB.get(null, key, data, null) == OperationStatus.SUCCESS)) {
		return IntegerBinding.entryToInt(data);
	} else {
		return -1;
	}
}
 

/**
 * This method is used to create a persistent mapping between the given id and an internal id (equal to
 * the current value of {@link #loadCounter}). Should be called every time that a new vector is indexed.
 * 
 * @param id
 *            The id
 */
protected void createMapping(String id) {
	DatabaseEntry key = new DatabaseEntry();
	DatabaseEntry data = new DatabaseEntry();
	IntegerBinding.intToEntry(loadCounter, key);
	StringBinding.stringToEntry(id, data);
	iidToIdDB.put(null, key, data); // required during name look-up
	idToIidDB.put(null, data, key); // required during indexing
}
 

/**
 * This is a utility method that can be used to dump the contents of the iidToIdDB to a txt file.
 * 
 * @param dumpFilename
 *            Full path to the file where the dump will be written.
 * @throws Exception
 */
public void dumpiidToIdDB(String dumpFilename) throws Exception {
	DatabaseEntry foundKey = new DatabaseEntry();
	DatabaseEntry foundData = new DatabaseEntry();

	ForwardCursor cursor = iidToIdDB.openCursor(null, null);
	BufferedWriter out = new BufferedWriter(new FileWriter(new File(dumpFilename)));
	while (cursor.getNext(foundKey, foundData, LockMode.DEFAULT) == OperationStatus.SUCCESS) {
		int iid = IntegerBinding.entryToInt(foundKey);
		String id = StringBinding.entryToString(foundData);
		out.write(iid + " " + id + "\n");
	}
	cursor.close();
	out.close();
}
 

/**
 * This is a utility method that can be used to dump the contents of the idToIidDB to a txt file.
 * 
 * @param dumpFilename
 *            Full path to the file where the dump will be written.
 * @throws Exception
 */
public void dumpidToIidDB(String dumpFilename) throws Exception {
	DatabaseEntry foundKey = new DatabaseEntry();
	DatabaseEntry foundData = new DatabaseEntry();

	ForwardCursor cursor = idToIidDB.openCursor(null, null);
	BufferedWriter out = new BufferedWriter(new FileWriter(new File(dumpFilename)));
	while (cursor.getNext(foundKey, foundData, LockMode.DEFAULT) == OperationStatus.SUCCESS) {
		int iid = IntegerBinding.entryToInt(foundData);
		String id = StringBinding.entryToString(foundKey);
		out.write(id + " " + iid + "\n");
	}
	cursor.close();
	out.close();
}
 

@Override
public void performUpgrade(final Environment environment,
                           final UpgradeInteractionHandler handler,
                           final ConfiguredObject<?> parent)
{
    reportStarting(environment, 8);

    DatabaseConfig dbConfig = new DatabaseConfig();
    dbConfig.setTransactional(true);
    dbConfig.setAllowCreate(true);

    final Transaction transaction = environment.beginTransaction(null, null);
    try
    {
        Database userPreferencesDb = environment.openDatabase(transaction, "USER_PREFERENCES", dbConfig);
        userPreferencesDb.close();

        try (Database userPreferencesVersionDb = environment.openDatabase(transaction,
                                                                          "USER_PREFERENCES_VERSION",
                                                                          dbConfig))
        {
            if (userPreferencesVersionDb.count() == 0L)
            {
                DatabaseEntry key = new DatabaseEntry();
                DatabaseEntry value = new DatabaseEntry();
                StringBinding.stringToEntry(DEFAULT_VERSION, key);
                LongBinding.longToEntry(System.currentTimeMillis(), value);
                OperationStatus status = userPreferencesVersionDb.put(transaction, key, value);
                if (status != OperationStatus.SUCCESS)
                {
                    throw new StoreException("Error initialising user preference version: " + status);
                }
            }
        }

        transaction.commit();
        reportFinished(environment, 9);
    }
    catch (RuntimeException e)
    {
        try
        {
            if (transaction.isValid())
            {
                transaction.abort();
            }
        }
        finally
        {
            throw e;
        }
    }
}
 

/**
 * <b>{@link #getInternalId(String)} can always be called instead of this method at the same cost!</b>
 * <br>
 * Checks if the vector with the given id is already indexed. This method is useful to avoid re-indexing
 * the same vector. Its convention is that if the given name is already in idToIidBDB, then the vector is
 * indexed in all other structures e.g. iidToIdBDB. The rest of the checks are avoided for efficiency.
 * Accesses the BDB store!
 * 
 * @param id
 *            The id the vector
 * @return true if the vector is indexed, false otherwise
 */
public boolean isIndexed(String id) {
	DatabaseEntry key = new DatabaseEntry();
	StringBinding.stringToEntry(id, key);
	DatabaseEntry data = new DatabaseEntry();
	if ((idToIidDB.get(null, key, data, null) == OperationStatus.SUCCESS)) {
		return true;
	} else {
		return false;
	}
}