# EventsourcingAssembler.java

    /*
     * Licensed to the Apache Software Foundation (ASF) under one
     * or more contributor license agreements.  See the NOTICE file
     * distributed with this work for additional information
     * regarding copyright ownership.  The ASF licenses this file
     * to you under the Apache License, Version 2.0 (the
     * "License"); you may not use this file except in compliance
     * with the License.  You may obtain a copy of the License at
     *
     *   http://www.apache.org/licenses/LICENSE-2.0
     *
     * Unless required by applicable law or agreed to in writing,
     * software distributed under the License is distributed on an
     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     * KIND, either express or implied.  See the License for the
     * specific language governing permissions and limitations
     * under the License.
     */
    package org.qi4j.library.eventsourcing.bootstrap;

    import org.qi4j.bootstrap.Assemblers;
    import org.qi4j.bootstrap.AssemblyException;
    import org.qi4j.bootstrap.ImportedServiceDeclaration;
    import org.qi4j.bootstrap.ModuleAssembly;
    import org.qi4j.library.eventsourcing.application.api.ApplicationEvent;
    import org.qi4j.library.eventsourcing.application.api.TransactionApplicationEvents;
    import org.qi4j.library.eventsourcing.application.factory.ApplicationEventFactoryService;
    import org.qi4j.library.eventsourcing.domain.api.DomainEventValue;
    import org.qi4j.library.eventsourcing.domain.api.UnitOfWorkDomainEventsValue;
    import org.qi4j.library.eventsourcing.domain.factory.CurrentUserUoWPrincipal;
    import org.qi4j.library.eventsourcing.domain.factory.DomainEventFactoryService;

    public class EventsourcingAssembler
        extends Assemblers.Visibility<EventsourcingAssembler>
    {
        private boolean domainEvents;
        private boolean applicationEvents;

        private boolean uowPrincipal;

        public EventsourcingAssembler withDomainEvents()
        {
            domainEvents = true;
            return this;
        }

        public EventsourcingAssembler withApplicationEvents()
        {
            applicationEvents = true;
            return this;
        }

        public EventsourcingAssembler withCurrentUserFromUOWPrincipal()
        {
            uowPrincipal = true;
            return this;
        }

        @Override
        public void assemble(ModuleAssembly module) throws AssemblyException
        {
            if( domainEvents )
            {
                module.values( DomainEventValue.class, UnitOfWorkDomainEventsValue.class );
                module.services( DomainEventFactoryService.class).visibleIn(visibility() );
            }

            if( applicationEvents )
            {
                module.values( ApplicationEvent.class, TransactionApplicationEvents.class );
                module.services( ApplicationEventFactoryService.class ).visibleIn( visibility() );
            }

            if( uowPrincipal )
            {
                module.importedServices( CurrentUserUoWPrincipal.class )
                    .importedBy( ImportedServiceDeclaration.NEW_OBJECT );
                module.objects( CurrentUserUoWPrincipal.class );
            }
        }
    }