Examples of org.exolab.castor.persist.TransactionContext

org.exolab.castor.persist.TransactionContext
A transaction context is required in order to perform operations against the database. The transaction context is mapped to an API transaction or an XA transaction. The only way to begin a new transaction is through the creation of a new transaction context. A transaction context is created from an implementation class directly or through {@link XAResourceImpl}. @author Assaf Arkin @version $Revision: 1.15 $ $Date: 2005/02/07 20:48:22 $


        _dbEngine = _dbImpl.getLockEngine();
        if ( _dbEngine == null )
            throw new QueryException( "Could not get a persistence engine" );


      TransactionContext trans = _dbImpl.getTransaction();
      DbMetaInfo dbInfo = trans.getConnectionInfo(_dbEngine);


      ParseTreeWalker walker = new ParseTreeWalker(_dbEngine, parseTree, _dbImpl.getClassLoader(), dbInfo);


        _objClass = walker.getObjClass();
        _clsDesc = walker.getClassDescriptor();

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    public Object load( Class type, Object identity, Object object ) 
            throws TransactionNotInProgressException, ObjectNotFoundException,
            LockNotGrantedException, PersistenceException {


        TransactionContext tx;
        PersistenceInfo    info;


        tx = getTransaction();
        info = _scope.getPersistenceInfo( type );
        if ( info == null )
            throw new ClassNotPersistenceCapableException( Messages.format( "persist.classNotPersistenceCapable", type.getName() ) );


        return tx.load( info.engine, info.molder, identity, object, null );
    }

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        return load( type, (Object)identity, accessMode );
    }


    public Object load( Class type, Object identity, short accessMode) throws ObjectNotFoundException, LockNotGrantedException, TransactionNotInProgressException, PersistenceException {
        TransactionContext tx;
        PersistenceInfo    info;
        AccessMode         mode;


        switch ( accessMode ) {
        case ReadOnly:
            mode = AccessMode.ReadOnly;
            break;
        case Shared:
            mode = AccessMode.Shared;
            break;
        case Exclusive:
            mode = AccessMode.Exclusive;
            break;
        case DbLocked:
            mode = AccessMode.DbLocked;
            break;
        default:
            throw new IllegalArgumentException( "Value for 'accessMode' is invalid" );
        }


        tx = getTransaction();
        info = _scope.getPersistenceInfo( type );
        if ( info == null )
            throw new ClassNotPersistenceCapableException( Messages.format("persist.classNotPersistenceCapable", type.getName()) );
        
        return tx.load( info.engine, info.molder, identity, null, mode );
    }

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    }


    public void create( Object object )
            throws ClassNotPersistenceCapableException, DuplicateIdentityException,
            TransactionNotInProgressException, PersistenceException {
        TransactionContext tx;
        PersistenceInfo    info;


        tx = getTransaction();
        info = _scope.getPersistenceInfo( object.getClass() );
        if ( info == null )
            throw new ClassNotPersistenceCapableException( Messages.format("persist.classNotPersistenceCapable", object.getClass().getName()) );


        tx.create( info.engine, info.molder, object, null );
    }

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    public void update( Object object )
        throws ClassNotPersistenceCapableException, ObjectModifiedException,
               TransactionNotInProgressException, PersistenceException
    {
        TransactionContext tx;
        PersistenceInfo    info;


        tx = getTransaction();
        info = _scope.getPersistenceInfo( object.getClass() );
        if ( info == null )
            throw new ClassNotPersistenceCapableException( Messages.format("persist.classNotPersistenceCapable", object.getClass().getName()) );


        tx.update( info.engine, info.molder, object, null );
    }

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    public void remove( Object object )
        throws ObjectNotPersistentException, LockNotGrantedException, 
               TransactionNotInProgressException, PersistenceException
    {
        TransactionContext tx;
        PersistenceInfo info;
        
        tx = getTransaction();
        info = _scope.getPersistenceInfo( object.getClass() );
        if ( info == null )
            throw new ClassNotPersistenceCapableException( Messages.format("persist.classNotPersistenceCapable", object.getClass().getName()) );


        tx.delete( object );
    }

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        remove( object );
    }


    public boolean isPersistent( Object object )
    {
        TransactionContext tx;
        
        if ( _scope == null )
            throw new IllegalStateException( Messages.message( "jdo.dbClosed" ) );
        if ( _ctx != null && _ctx.isOpen()  )
            return _ctx.isPersistent( object );

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        return false;
    }


    public Object getIdentity(Object object)
    {
        TransactionContext tx;
        
        if ( _scope == null )
            throw new IllegalStateException( Messages.message( "jdo.dbClosed" ) );
        if ( _ctx != null && _ctx.isOpen()  )
            return _ctx.getIdentity( object );

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    protected TransactionContext getTransaction()
        throws TransactionNotInProgressException
    {
        TransactionContext tx;
        
        if ( _scope == null )
            throw new TransactionNotInProgressException( Messages.message( "jdo.dbClosed" ) );
        if ( _ctx != null && _ctx.isOpen()  )
            return _ctx;

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org.exolab.castor.jdo.TransactionAbortedException

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