Java LobManager类代码示例

import org.hsqldb.persist.LobManager; //导入依赖的package包/类
public void createObjectStructures() {

        lobManager     = new LobManager(this);
        nameManager    = new HsqlNameManager(this);
        granteeManager = new GranteeManager(this);
        userManager    = new UserManager(this);
        schemaManager  = new SchemaManager(this);
        persistentStoreCollection =
            new PersistentStoreCollectionDatabase(this);
        databaseUniqueName = nameManager.newHsqlName("", false,
                SchemaObject.DATABASE);

        isReferentialIntegrity = true;
        sessionManager         = new SessionManager(this);
        collation              = Collation.newDatabaseInstance();
        dbInfo = DatabaseInformation.newDatabaseInformation(this);
        txManager              = new TransactionManager2PL(this);

        lobManager.createSchema();
        sessionManager.getSysLobSession().setSchema(SqlInvariants.LOBS_SCHEMA);
        schemaManager.setSchemaChangeTimestamp();
        schemaManager.createSystemTables();

    }
 

import org.hsqldb.persist.LobManager; //导入依赖的package包/类
/**
 *  Constructs a new Database object.
 *
 * @param type is the type of the database: "mem:", "file:", "res:"
 * @param path is the given path to the database files
 * @param canonicalPath is the canonical path
 * @param props property overrides placed on the connect URL
 * @exception  HsqlException if the specified name and path
 *      combination is illegal or unavailable, or the database files the
 *      name and path resolves to are in use by another process
 */
Database(String type, String path, String canonicalPath,
         HsqlProperties props) {

    setState(Database.DATABASE_SHUTDOWN);

    this.databaseType  = type;
    this.path          = path;
    this.canonicalPath = canonicalPath;
    this.urlProperties = props;

    if (databaseType == DatabaseURL.S_RES) {
        filesInJar    = true;
        filesReadOnly = true;
    }

    logger = new Logger(this);
    shutdownOnNoConnection =
        urlProperties.isPropertyTrue(HsqlDatabaseProperties.url_shutdown);
    lobManager = new LobManager(this);
}
 

import org.hsqldb.persist.LobManager; //导入依赖的package包/类
/**
 * Opens this database.  The database should be opened after construction.
 * or reopened by the close(int closemode) method during a
 * "shutdown compact". Closes the log if there is an error.
 */
void reopen() {

    boolean isNew = false;

    setState(DATABASE_OPENING);

    try {
        lobManager     = new LobManager(this);
        nameManager    = new HsqlNameManager(this);
        granteeManager = new GranteeManager(this);
        userManager    = new UserManager(this);
        schemaManager  = new SchemaManager(this);
        persistentStoreCollection =
            new PersistentStoreCollectionDatabase(this);
        isReferentialIntegrity = true;
        sessionManager         = new SessionManager(this);
        collation              = collation.newDatabaseInstance();
        dbInfo = DatabaseInformation.newDatabaseInformation(this);
        txManager              = new TransactionManager2PL(this);

        lobManager.createSchema();
        sessionManager.getSysLobSession().setSchema(
            SqlInvariants.LOBS_SCHEMA);
        schemaManager.setSchemaChangeTimestamp();
        schemaManager.createSystemTables();

        // completed metadata
        logger.open();

        isNew = logger.isNewDatabase;

        if (isNew) {
            String username = urlProperties.getProperty("user", "SA");
            String password = urlProperties.getProperty("password", "");

            userManager.createFirstUser(username, password);
            schemaManager.createPublicSchema();
            logger.checkpoint(false);
        }

        lobManager.open();
        dbInfo.setWithContent(true);

        checkpointRunner = new CheckpointRunner();
        timeoutRunner    = new TimeoutRunner();
    } catch (Throwable e) {
        logger.close(Database.CLOSEMODE_IMMEDIATELY);
        logger.releaseLock();
        setState(DATABASE_SHUTDOWN);
        clearStructures();
        DatabaseManager.removeDatabase(this);

        if (!(e instanceof HsqlException)) {
            e = Error.error(ErrorCode.GENERAL_ERROR, e);
        }

        logger.logSevereEvent("could not reopen database", e);

        throw (HsqlException) e;
    }

    setState(DATABASE_ONLINE);
}