Examples of com.atomikos.persistence.StateRecoverable

com.atomikos.persistence.StateRecoverable
A type of stateful objects whose state is guaranteed to be recoverable. The logging is done based on PreEnter events. The guarantee offered is the following: IF a recoverable state is reached by the instance, then its image is GUARANTEED to be recoverable. The inverse does NOT hold: the fact that an object is recovered in some state does NOT mean that the state was reached. Indeed, other PreEnter listeners may still have prevented the transition in the last moment. However, this should not be a real problem; applications should take this into account.


    public synchronized void preEnter ( FSMEnterEvent event )
            throws IllegalStateException
    {
        Object state = event.getState ();
        StateRecoverable source = (StateRecoverable) event.getSource ();
        ObjectImage img = source.getObjectImage ( state );
        //if img null: do nothing (BUG FIX 10041)
        if ( img != null ) {
            StateObjectImage simg = new StateObjectImage ( img );
          Object[] finalstates = source.getFinalStates ();
          boolean delete = false;
  
          for ( int i = 0; i < finalstates.length; i++ ) {
              if ( state.equals ( finalstates[i] ) )
                  delete = true;

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     * @see StateRecoveryManager
     */


    public StateRecoverable recover ( Object id ) throws LogException
    {
        StateRecoverable ret = null;


        StateObjectImage simg = (StateObjectImage) idToElementMap.get ( id );
        ret = (StateRecoverable) simg.restore ();


        return ret;

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     */


    public void preEnter ( FSMEnterEvent event ) throws IllegalStateException
    {
        Object state = event.getState ();
        StateRecoverable source = (StateRecoverable) event.getSource ();
        ObjectImage img = source.getObjectImage ( state );
        if ( img != null ) {
            //null images are not logged as per the Recoverable contract
            StateObjectImage simg = new StateObjectImage ( img );
            Object[] finalstates = source.getFinalStates ();
            boolean delete = false;


            for ( int i = 0; i < finalstates.length; i++ ) {
                if ( state.equals ( finalstates[i] ) )
                    delete = true;

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     * @see StateRecoveryManager
     */


    public StateRecoverable recover ( Object id ) throws LogException
    {
        StateRecoverable srec = (StateRecoverable) objectlog_.recover ( id );
        if ( srec != null ) // null if not found!
            register ( srec );
        return srec;
    }

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    public Vector recover () throws LogException
    {
        Vector ret = objectlog_.recover ();
        Enumeration enumm = ret.elements ();
        while ( enumm.hasMoreElements () ) {
            StateRecoverable srec = (StateRecoverable) enumm.nextElement ();
            register ( srec );
        }
        return ret;
    }

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    public synchronized void preEnter ( FSMEnterEvent event )
            throws IllegalStateException
    {
        Object state = event.getState ();
        StateRecoverable source = (StateRecoverable) event.getSource ();
        ObjectImage img = source.getObjectImage ( state );
        //if img null: do nothing (BUG FIX 10041)
        if ( img != null ) {
            StateObjectImage simg = new StateObjectImage ( img );
          Object[] finalstates = source.getFinalStates ();
          boolean delete = false;
  
          for ( int i = 0; i < finalstates.length; i++ ) {
              if ( state.equals ( finalstates[i] ) )
                  delete = true;

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     * @see StateRecoveryManager
     */


    public StateRecoverable recover ( Object id ) throws LogException
    {
        StateRecoverable ret = null;


        StateObjectImage simg = (StateObjectImage) idToElementMap.get ( id );
        ret = (StateRecoverable) simg.restore ();


        return ret;

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     */


    public void preEnter ( FSMEnterEvent event ) throws IllegalStateException
    {
        Object state = event.getState ();
        StateRecoverable source = (StateRecoverable) event.getSource ();
        ObjectImage img = source.getObjectImage ( state );
        if ( img != null ) {
            //null images are not logged as per the Recoverable contract
            StateObjectImage simg = new StateObjectImage ( img );
            Object[] finalstates = source.getFinalStates ();
            boolean delete = false;


            for ( int i = 0; i < finalstates.length; i++ ) {
                if ( state.equals ( finalstates[i] ) )
                    delete = true;

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     * @see StateRecoveryManager
     */


    public StateRecoverable recover ( Object id ) throws LogException
    {
        StateRecoverable srec = (StateRecoverable) objectlog_.recover ( id );
        if ( srec != null ) // null if not found!
            register ( srec );
        return srec;
    }

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    public Vector recover () throws LogException
    {
        Vector ret = objectlog_.recover ();
        Enumeration enumm = ret.elements ();
        while ( enumm.hasMoreElements () ) {
            StateRecoverable srec = (StateRecoverable) enumm.nextElement ();
            register ( srec );
        }
        return ret;
    }

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Related Classes of com.atomikos.persistence.StateRecoverable

com.atomikos.persistence.imp.StateRecoveryManagerImp

com.atomikos.persistence.imp.VolatileStateRecoveryManager

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