de.zib.gndms.logic.model.dspace.TransformSliceAction Class Reference

A TransformSliceAction converts its slice to a new created slice (using de.zib.gndms.logic.model.dspace.CreateSliceAction) and adds it to the subspace corresponding to new slice object. More...

Inherits de::zib::gndms::logic::model::AbstractModelEntityAction< Slice, Slice >.

List of all members.

Public Member Functions
	TransformSliceAction (String uid, DateTime ttm, SliceKind kind, Subspace tgt, long ssize)
	Creates a new CreateSliceAction instances with the parameters given in the signature and sets the model of createSliceAction to.
	TransformSliceAction (String uid, DateTime ttm, SliceKind kind, Subspace tgt, long ssize, DirectoryAux da)
	Creates a new CreateSliceAction instances with the parameters given in the signature and sets the model of createSliceAction to.
void	initialize ()
Slice	execute (@NotNull EntityManager em)
	Executes the slice transformation.
Private Attributes
final CreateSliceAction	createSliceAction
DirectoryAux	directoryAux

---

Detailed Description

A TransformSliceAction converts its slice to a new created slice (using de.zib.gndms.logic.model.dspace.CreateSliceAction) and adds it to the subspace corresponding to new slice object.

The new slice instance is specified and will be created by the constructor of this class.

Author:

try ma ik jo rr a zib

Version:

$Id$

User: mjorra, Date: 13.08.2008, Time: 13:20:25

In this version the out-dated slices remains in the db and its directory on disk, the caller must take care of removing it with the appropriate action.

todo make uses of UUIdGen from AbstractEntityAction

---

Constructor & Destructor Documentation

de.zib.gndms.logic.model.dspace.TransformSliceAction.TransformSliceAction	(	String	uid,
		DateTime	ttm,
		SliceKind	kind,
		Subspace	tgt,
		long	ssize
	)

Creates a new CreateSliceAction instances with the parameters given in the signature and sets the model of createSliceAction to.

 tgt 

.

Parameters:

uid	name of the owner of the new slice, can be null, then the current user will become the owner.
ttm	the termination time of the slice object
kind	the sliceKind instance for the slice. (See Slice).
tgt	a subspace the new created slice will be registered on
ssize	total storage size for the slice instance

                                              {

        createSliceAction = new CreateSliceAction( uid, ttm, kind, ssize );
        createSliceAction.setModel( tgt );
    }

de.zib.gndms.logic.model.dspace.TransformSliceAction.TransformSliceAction	(	String	uid,
		DateTime	ttm,
		SliceKind	kind,
		Subspace	tgt,
		long	ssize,
		DirectoryAux	da
	)

Creates a new CreateSliceAction instances with the parameters given in the signature and sets the model of createSliceAction to.

 tgt 

.

Parameters:

uid	name of the owner of the new slice, can be null, then the current user will become the owner.
ttm	the termination time of the slice object
kind	the sliceKind instance for the slice. (See Slice).
tgt	a subspace the new created slice will be registered on
ssize	total storage size for the slice instance
da	an helper object for directory access

                                                                                                                      {

       directoryAux = da;
       createSliceAction = new CreateSliceAction( uid, ttm, kind, ssize, da );
       createSliceAction.setModel( tgt );
   }

---

Member Function Documentation

Slice de.zib.gndms.logic.model.dspace.TransformSliceAction.execute

(

@NotNull EntityManager

em

)

Executes the slice transformation.

NOTE: Since this method uses DirectoryAux.copyDir the obeys the restriction of this method.

                                                    {

        Slice sl = getModel( );
        Subspace sp = sl.getSubspace( );

        if( directoryAux == null ) {
            directoryAux = getInjector().getInstance( DirectoryAux.class );
        }

        if(! sp.getCreatableSliceKinds( ).contains( createSliceAction.getSliceKind( ) ) )
            return null;

        // create an new slice of the given kind
        Slice nsl = createSliceAction.execute( em );
        if ( nsl == null )
             throw new RuntimeException( "Can't create slice" );


        // copy contents of old slice to the new one
        String src_pth = sp.getPathForSlice( sl );
        String tgt_pth = createSliceAction.getModel( ).getPathForSlice( nsl );

        AccessMask msk = createSliceAction.getSliceKind( ).getPermission( );
        boolean ro = msk.queryFlagsOff( AccessMask.Ugo.USER, AccessMask.AccessFlags.WRITABLE );

        // make slice path writable to copy content
        if ( ro ) {
            msk.addFlag( AccessMask.Ugo.USER, AccessMask.AccessFlags.WRITABLE );
            directoryAux.setPermissions( nsl.getOwner(), msk, tgt_pth );
        }


        directoryAux.move( src_pth, tgt_pth );

        // restore slice path settings
        if ( ro ) {
            msk.removeFlag( AccessMask.Ugo.USER, AccessMask.AccessFlags.WRITABLE );
            directoryAux.setPermissions( nsl.getOwner(), msk, tgt_pth );
        }

        // TODO: update slice in database

        /*
        // sth went wrong destroy created slice
        if( ! suc ) {
            DeleteSliceAction.deleteSlice( sl, this );
            throw new RuntimeException( "Can't copy slice content" );
        }
        */

        // no entries in BatchUpdateAction required, already done by the create action

        return nsl;
    }

---

The documentation for this class was generated from the following file:

• logic/src/de/zib/gndms/logic/model/dspace/TransformSliceAction.java