Examples of org.qi4j.api.unitofwork.UnitOfWork

org.qi4j.api.unitofwork.UnitOfWork
All operations on entities goes through an UnitOfWork.
A UnitOfWork allows you to access Entities and work with them. All modifications to Entities are recorded by the UnitOfWork, and at the end they may be sent to the underlying EntityStore by calling complete(). If the UoW was read-only you may instead simply discard() it.

A UoW differs from a traditional Transaction in the sense that it is not tied at all to the underlying storage resource. Because of this there is no timeout on a UoW. It can be very short or very long. Another difference is that if a call to complete() fails, and the cause is validation errors in the Entities of the UoW, then these can be corrected and the UoW retried. By contrast, when a Transaction commit fails, then the whole transaction has to be done from the beginning again.
A UoW can be associated with a Usecase. A Usecase describes the metainformation about the process to be performed by the UoW.
If a code block that uses a UoW throws an exception you need to ensure that this is handled properly, and that the UoW is closed before returning. Because discard() is a no-op if the UoW is closed, we therefore recommend the following template to be used:
```
 UnitOfWork uow = uowf.newUnitOfWork(); try { ... uow.complete(); } finally { uow.discard(); } 
```
This ensures that in the happy case the UoW is completed, and if any exception is thrown the UoW is discarded. After the UoW has completed the discard() method doesn't do anything, and so has no effect. You can choose to either add catch blocks for any exceptions, including exceptions from complete(), or skip them.

    @Test
    public void deviation_4b_LOAD_2c_UnexpectedVoyageNotFromItinerary() throws Exception
    {
        deviation_4b_LOAD_2b_ExpectedPort();


        UnitOfWork uow = module.currentUnitOfWork();
        HandlingEventsEntity HANDLING_EVENTS = uow.get( HandlingEventsEntity.class, HandlingEventsEntity.HANDLING_EVENTS_ID );
        // Load onto unexpected voyage
        HandlingEvent handlingEvent = HANDLING_EVENTS.createHandlingEvent( day( 1 ), day( 1 ), trackingId, LOAD, HONGKONG, V400S );
        Delivery delivery = new BuildDeliverySnapshot( cargo, handlingEvent ).get();


        assertThat( delivery.isMisdirected().get(), is( equalTo( true ) ) );

View Full Code Here

    @Test
    public void deviation_4b_LOAD_2c_ExpectedButLaterVoyageInItinerary() throws Exception
    {
        deviation_4b_LOAD_2c_UnexpectedVoyageNotFromItinerary();


        UnitOfWork uow = module.currentUnitOfWork();
        HandlingEventsEntity HANDLING_EVENTS = uow.get( HandlingEventsEntity.class, HandlingEventsEntity.HANDLING_EVENTS_ID );


        // The system doesn't currently check if handling events happen in the right order, so
        // a cargo can now suddenly load in New York, even though it hasn't got there yet.
        HandlingEvent handlingEvent = HANDLING_EVENTS.createHandlingEvent( day( 5 ), day( 5 ), trackingId, LOAD, NEWYORK, V200T );
        Delivery delivery = new BuildDeliverySnapshot( cargo, handlingEvent ).get();

View Full Code Here

    @Test
    public void deviation_4c_UNLOAD_1a_UnexpectedPort() throws Exception
    {
        deviation_4b_LOAD_2c_ExpectedButLaterVoyageInItinerary();


        UnitOfWork uow = module.currentUnitOfWork();
        HandlingEventsEntity HANDLING_EVENTS = uow.get( HandlingEventsEntity.class, HandlingEventsEntity.HANDLING_EVENTS_ID );


        // Unexpected unload in Tokyo
        HandlingEvent handlingEvent = HANDLING_EVENTS.createHandlingEvent( day( 5 ), day( 5 ), trackingId, UNLOAD, TOKYO, V100S );
        Delivery delivery = new BuildDeliverySnapshot( cargo, handlingEvent ).get();
        cargo.delivery().set( delivery );

View Full Code Here

    @Test
    public void deviation_4c_UNLOAD_1b_ExpectedMidpointLocation() throws Exception
    {
        deviation_4c_UNLOAD_1a_UnexpectedPort();


        UnitOfWork uow = module.currentUnitOfWork();
        HandlingEventsEntity HANDLING_EVENTS = uow.get( HandlingEventsEntity.class, HandlingEventsEntity.HANDLING_EVENTS_ID );


        // Unload at midpoint location of itinerary
        HandlingEvent handlingEvent = HANDLING_EVENTS.createHandlingEvent( day( 8 ), day( 8 ), trackingId, UNLOAD, HAMBURG, V400S );
        Delivery delivery = new BuildDeliverySnapshot( cargo, handlingEvent ).get();

View Full Code Here

    @Test
    public void deviation_4c_UNLOAD_1c_Destination() throws Exception
    {
        deviation_4c_UNLOAD_1b_ExpectedMidpointLocation();


        UnitOfWork uow = module.currentUnitOfWork();
        HandlingEventsEntity HANDLING_EVENTS = uow.get( HandlingEventsEntity.class, HandlingEventsEntity.HANDLING_EVENTS_ID );


        // Unload at destination
        HandlingEvent handlingEvent = HANDLING_EVENTS.createHandlingEvent( day( 16 ), day( 16 ), trackingId, UNLOAD, STOCKHOLM, V500S );
        Delivery delivery = new BuildDeliverySnapshot( cargo, handlingEvent ).get();

View Full Code Here

    @Test
    public void deviation_4d_CUSTOMS_1a_CargoIsInDestinationPort() throws Exception
    {
        deviation_4c_UNLOAD_1c_Destination();


        UnitOfWork uow = module.currentUnitOfWork();
        HandlingEventsEntity HANDLING_EVENTS = uow.get( HandlingEventsEntity.class, HandlingEventsEntity.HANDLING_EVENTS_ID );


        // Cargo was handled by the customs authorities
        HandlingEvent handlingEvent = HANDLING_EVENTS.createHandlingEvent( day( 16 ), day( 16 ), trackingId, CUSTOMS, STOCKHOLM, null );
        Delivery delivery = new BuildDeliverySnapshot( cargo, handlingEvent ).get();

View Full Code Here

    @Test
    public void deviation_4e_CLAIM_1a_CargoIsNotInDestinationPort() throws Exception
    {
        deviation_4d_CUSTOMS_1a_CargoIsInDestinationPort();


        UnitOfWork uow = module.currentUnitOfWork();
        HandlingEventsEntity HANDLING_EVENTS = uow.get( HandlingEventsEntity.class, HandlingEventsEntity.HANDLING_EVENTS_ID );


        // Cargo was claimed but not at destination location
        HandlingEvent handlingEvent = HANDLING_EVENTS.createHandlingEvent( day( 1 ), day( 16 ), trackingId, CLAIM, HELSINKI, null );
        Delivery delivery = new BuildDeliverySnapshot( cargo, handlingEvent ).get();

View Full Code Here

    @Test
    public void deviation_4e_CLAIM_1b_CargoIsInDestinationPort() throws Exception
    {
        deviation_4e_CLAIM_1a_CargoIsNotInDestinationPort();


        UnitOfWork uow = module.currentUnitOfWork();
        HandlingEventsEntity HANDLING_EVENTS = uow.get( HandlingEventsEntity.class, HandlingEventsEntity.HANDLING_EVENTS_ID );


        // Cargo was claimed by customer at destination location
        HandlingEvent handlingEvent = HANDLING_EVENTS.createHandlingEvent( day( 16 ), day( 16 ), trackingId, CLAIM, STOCKHOLM, null );
        Delivery delivery = new BuildDeliverySnapshot( cargo, handlingEvent ).get();

View Full Code Here

    {
        if( module == null )
        {
            return;
        }
        UnitOfWork uow = this.module.newUnitOfWork( UsecaseBuilder.newUsecase(
            "Delete " + getClass().getSimpleName() + " test data" ) );
        try
        {
            SQLConfiguration config = uow.get( SQLConfiguration.class,
                                               DerbySQLEntityStoreAssembler.DEFAULT_ENTITYSTORE_IDENTITY );
            Connection connection = module.findService( DataSource.class ).get().getConnection();
            String schemaName = config.schemaName().get();
            if( schemaName == null )
            {
                schemaName = SQLs.DEFAULT_SCHEMA_NAME;
            }


            Statement stmt = null;
            try
            {
                stmt = connection.createStatement();
                stmt.execute( String.format( "DELETE FROM %s." + SQLs.TABLE_NAME, schemaName ) );
                connection.commit();
            }
            finally
            {
                SQLUtil.closeQuietly( stmt );
            }
        }
        finally
        {
            uow.discard();
            super.cleanUp();
        }
    }

View Full Code Here

            } );
            application.activate();


            Module moduleInstance = application.findModule( "Layer 1", "config" );
            UnitOfWorkFactory uowf = moduleInstance;
            UnitOfWork uow = uowf.newUnitOfWork();
            try
            {
                SQLConfiguration config = uow.get( SQLConfiguration.class,
                                                   PostgreSQLEntityStoreAssembler.DEFAULT_ENTITYSTORE_IDENTITY );
                // TODO fix AbstractEntityStorePerformanceTest to extend from AbstractQi4jTest
                Connection connection = null; // SQLUtil.getConnection( this.serviceLocator );
                String schemaName = config.schemaName().get();
                if( schemaName == null )
                {
                    schemaName = SQLs.DEFAULT_SCHEMA_NAME;
                }


                Statement stmt = null;
                try
                {
                    stmt = connection.createStatement();
                    stmt.execute( String.format( "DELETE FROM %s." + SQLs.TABLE_NAME, schemaName ) );
                    connection.commit();
                }
                finally
                {
                    SQLUtil.closeQuietly( stmt );
                }
            }
            finally
            {
                uow.discard();
            }
        }
    }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of org.qi4j.api.unitofwork.UnitOfWork

org.codeartisans.playqi.ControllersModuleUnitOfWorkAction

org.codeartisans.playqi.ControllersModuleUnitOfWorkCallable

org.codeartisans.playqi.PlayQiSingleUnitOfWorkAction

org.codeartisans.playqi.PlayQiUnitOfWorkAction

org.qi4j.api.common.OptionalTest

org.qi4j.api.common.RemovalTest

org.qi4j.api.value.ValueCompositeTest

org.qi4j.dci.moneytransfer.test.TransferMoneyTest

org.qi4j.dci.moneytransfer.test.TransferMoneyTest2

org.qi4j.envisage.sample.EnvisageSample

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.