Package org.datanucleus.store.rdbms.autostart

Class SchemaAutoStarter

  • All Implemented Interfaces:
    org.datanucleus.store.autostart.AutoStartMechanism
    public class SchemaAutoStarter
extends org.datanucleus.store.autostart.AbstractAutoStartMechanism
    Implementation of an Auto-Start Mechanism for DataNucleus. This implementation stores the classes supported in a table in the datastore. It is initialised and read at startup, and is continually updated during the lifetime of the calling application.

    • Nested Class Summary

      • Nested classes/interfaces inherited from interface org.datanucleus.store.autostart.AutoStartMechanism

        org.datanucleus.store.autostart.AutoStartMechanism.Mode

    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected org.datanucleus.store.connection.ManagedConnection mconn  
      protected SchemaTable schemaTable  
      protected RDBMSStoreManager storeMgr  

      • Fields inherited from class org.datanucleus.store.autostart.AbstractAutoStartMechanism

        mode, open

    • Constructor Summary

      Constructors 
      Constructor Description
      SchemaAutoStarter​(org.datanucleus.store.StoreManager store_mgr, org.datanucleus.ClassLoaderResolver clr)
      Constructor.

    • Field Detail

      • mconn

        protected org.datanucleus.store.connection.ManagedConnection mconn

    • Constructor Detail

      • SchemaAutoStarter

        public SchemaAutoStarter​(org.datanucleus.store.StoreManager store_mgr,
                         org.datanucleus.ClassLoaderResolver clr)
        Constructor.
        Parameters:
        store_mgr - The RDBMSManager managing the store that we are auto-starting.
        clr - The ClassLoaderResolver

    • Method Detail

      • getAllClassData

        public Collection getAllClassData()
                           throws org.datanucleus.exceptions.DatastoreInitialisationException
        Accessor for the data for the classes supported.
        Returns:
        Collection of classes supported (StoreData). Collection of StoreData elements
        Throws:
        org.datanucleus.exceptions.DatastoreInitialisationException - if an error occurs in datastore communication

      • open

        public void open()
        Starts a transaction for writing (add/delete) classes to the auto start mechanism
        Specified by:
        open in interface org.datanucleus.store.autostart.AutoStartMechanism
        Overrides:
        open in class org.datanucleus.store.autostart.AbstractAutoStartMechanism

      • close

        public void close()
        Closes a transaction for writing (add/delete) classes to the auto start mechanism
        Specified by:
        close in interface org.datanucleus.store.autostart.AutoStartMechanism
        Overrides:
        close in class org.datanucleus.store.autostart.AbstractAutoStartMechanism

      • isOpen

        public boolean isOpen()
        Whether it's open for writing (add/delete) classes to the auto start mechanism
        Specified by:
        isOpen in interface org.datanucleus.store.autostart.AutoStartMechanism
        Overrides:
        isOpen in class org.datanucleus.store.autostart.AbstractAutoStartMechanism
        Returns:
        whether this is open for writing

      • addClass

        public void addClass​(org.datanucleus.store.StoreData data)
        Method to add a class to the supported list.
        Parameters:
        data - Data for the class to add.

      • deleteClass

        public void deleteClass​(String class_name)
        Method to drop support for a class.
        Parameters:
        class_name - The class

      • deleteAllClasses

        public void deleteAllClasses()
        Method to drop support for all current classes.

      • getStorageDescription

        public String getStorageDescription()
        Utility to output the storage description for this mechanism.
        Returns:
        The storage description