Interface AccessFactory

  • All Known Implementing Classes:
    RAMAccessManager, RllRAMAccessManager

    public interface AccessFactory
    Module interface for an access manager. An access manager provides transactional access via access methods to data in a single storage manager.

    An AccessFactory is typically obtained from the Monitor:

            // Get the current transaction controller.
            AccessFactory af;
            af = (AccessFactory) Monitor.findServiceModule(this, AccessFactory.MODULE);
      
    • Field Detail

      • MODULE

        static final java.lang.String MODULE
        Used to identify this interface when finding it with the Monitor.
        See Also:
        Constant Field Values
    • Method Detail

      • registerAccessMethod

        void registerAccessMethod​(MethodFactory factory)
        Register an access method that this access manager can use.
      • findMethodFactoryByImpl

        MethodFactory findMethodFactoryByImpl​(java.lang.String impltype)
                                       throws StandardException
        Find an access method that implements an implementation type.
        Throws:
        StandardException - Standard exception policy.
      • findMethodFactoryByFormat

        MethodFactory findMethodFactoryByFormat​(UUID format)
        Find an access method that implements a format type.
      • getLockFactory

        LockFactory getLockFactory()
        Get the LockFactory to use with this store.
        Returns:
        The lock factory to use with this store.
      • getXAResourceManager

        java.lang.Object getXAResourceManager()
                                       throws StandardException
        Return the XAResourceManager associated with this AccessFactory.

        Returns an object which can be used to implement the "offline" 2 phase commit interaction between the accessfactory and outstanding transaction managers taking care of in-doubt transactions.

        Returns:
        The XAResourceManager associated with this accessfactory.
        Throws:
        StandardException - Standard exception policy.
      • isReadOnly

        boolean isReadOnly()
        Is the store read-only.
      • createReadMeFiles

        void createReadMeFiles()
                        throws StandardException
        DERBY-5996(Create readme files (cautioning users against modifying database files) at database hard upgrade time) This gets called during hard upgrade. It will create 3 readme files one in database directory, one in "seg0" directory and one in log directory. These readme files warn users against touching any of files associated with derby database
        Throws:
        StandardException
      • getTransactionInfo

        TransactionInfo[] getTransactionInfo()
        Return a snap shot of all transactions in the db.

        Take a snap shot of all transactions currently in the database and make a record of their information.

        Returns:
        an array of TransactionInfo, or null if there is no transaction in the database.
      • startXATransaction

        java.lang.Object startXATransaction​(ContextManager cm,
                                            int format_id,
                                            byte[] global_id,
                                            byte[] branch_id)
                                     throws StandardException
        Start a global transaction.

        Get a transaction controller with which to manipulate data within the access manager. Implicitly creates an access context.

        Must only be called if no other transaction context exists in the current context manager. If another transaction exists in the context an exception will be thrown.

        The (format_id, global_id, branch_id) triplet is meant to come exactly from a javax.transaction.xa.Xid. We don't use Xid so that the system can be delivered on a non-1.2 vm system and not require the javax classes in the path.

        If the global transaction id given matches an existing in-doubt global transaction in the current system, then a StandardException will be thrown with a state of SQLState.STORE_XA_XAER_DUPID.

        Parameters:
        cm - The context manager for the current context.
        format_id - the format id part of the Xid - ie. Xid.getFormatId().
        global_id - the global transaction identifier part of XID - ie. Xid.getGlobalTransactionId().
        branch_id - The branch qualifier of the Xid - ie. Xid.getBranchQaulifier()
        Throws:
        StandardException - Standard exception policy.
        See Also:
        TransactionController
      • startReplicationMaster

        void startReplicationMaster​(java.lang.String dbmaster,
                                    java.lang.String host,
                                    int port,
                                    java.lang.String replicationMode)
                             throws StandardException
        Start the replication master role for this database
        Parameters:
        dbmaster - The master database that is being replicated.
        host - The hostname for the slave
        port - The port the slave is listening on
        replicationMode - The type of replication contract. Currently only asynchronous replication is supported, but 1-safe/2-safe/very-safe modes may be added later.
        Throws:
        StandardException - Standard Derby exception policy, thrown on error.
      • stopReplicationMaster

        void stopReplicationMaster()
                            throws StandardException
        Stop the replication master role for this database.
        Throws:
        StandardException - Standard Derby exception policy, thrown on error.
      • failover

        void failover​(java.lang.String dbname)
               throws StandardException
        Start the failover for this database.
        Parameters:
        dbname - the replication database that is being failed over.
        Throws:
        StandardException - Standard Derby exception policy, 1) If the failover succeeds, an exception is thrown to indicate that the master database was shutdown after a successful failover 2) If a failure occurs during network communication with slave.
      • freeze

        void freeze()
             throws StandardException
        Freeze the database temporarily so a backup can be taken.

        Please see Derby on line documentation on backup and restore.

        Throws:
        StandardException - Thrown on error
      • unfreeze

        void unfreeze()
               throws StandardException
        Unfreeze the database after a backup has been taken.

        Please see Derby on line documentation on backup and restore.

        Throws:
        StandardException - Thrown on error
      • backup

        void backup​(java.lang.String backupDir,
                    boolean wait)
             throws StandardException
        Backup the database to backupDir.

        Please see Derby on line documentation on backup and restore.

        Parameters:
        backupDir - the name of the directory where the backup should be stored.
        wait - if true, waits for all the backup blocking operations in progress to finish.
        Throws:
        StandardException - Thrown on error
      • backupAndEnableLogArchiveMode

        void backupAndEnableLogArchiveMode​(java.lang.String backupDir,
                                           boolean deleteOnlineArchivedLogFiles,
                                           boolean wait)
                                    throws StandardException
        Backup the database to a backup directory and enable the log archive mode that will keep the archived log files required for roll-forward from this version backup.
        Parameters:
        backupDir - the directory name where the database backup should go. This directory will be created if not it does not exist.
        deleteOnlineArchivedLogFiles - If true deletes online archived log files that exist before this backup, delete will occur only after backup is complete.
        wait - if true, waits for all the backup blocking operations in progress to finish.
        Throws:
        StandardException - Thrown on error
      • disableLogArchiveMode

        void disableLogArchiveMode​(boolean deleteOnlineArchivedLogFiles)
                            throws StandardException
        disables the log archival process, i.e No old log files will be kept around for a roll-forward recovery.
        Parameters:
        deleteOnlineArchivedLogFiles - If true deletes all online archived log files that exist before this call immediately; Only restore that can be performed after disabling log archive mode is version recovery.
        Throws:
        StandardException - Thrown on error
      • checkpoint

        void checkpoint()
                 throws StandardException
        Checkpoints the database, that is, flushes all dirty data to disk. Records a checkpoint in the transaction log, if there is a log.
        Throws:
        StandardException - Thrown on error
      • waitForPostCommitToFinishWork

        void waitForPostCommitToFinishWork()