/*
* Copyright 2009-2010 Rickard Öberg AB
*
* Licensed 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.application.factory;
import java.util.Date;
import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONStringer;
import org.json.JSONWriter;
import org.qi4j.api.concern.Concerns;
import org.qi4j.api.entity.IdentityGenerator;
import org.qi4j.api.injection.scope.Service;
import org.qi4j.api.injection.scope.Structure;
import org.qi4j.api.mixin.Mixins;
import org.qi4j.api.service.ServiceComposite;
import org.qi4j.api.structure.Application;
import org.qi4j.api.unitofwork.UnitOfWork;
import org.qi4j.api.unitofwork.UnitOfWorkFactory;
import org.qi4j.api.value.ValueBuilder;
import org.qi4j.api.value.ValueBuilderFactory;
import org.qi4j.library.eventsourcing.application.api.ApplicationEvent;
import org.qi4j.library.eventsourcing.domain.factory.UnitOfWorkNotificationConcern;
import org.qi4j.library.eventsourcing.domain.spi.CurrentUser;
/**
* DomainEventValue factory
*/
@Concerns(UnitOfWorkNotificationConcern.class)
@Mixins(ApplicationEventFactoryService.Mixin.class)
public interface ApplicationEventFactoryService
extends ApplicationEventFactory, ServiceComposite
{
class Mixin
implements ApplicationEventFactory
{
@Structure
UnitOfWorkFactory uowf;
@Structure
ValueBuilderFactory vbf;
@Service
IdentityGenerator idGenerator;
@Service
CurrentUser currentUser;
String version;
public void init( @Structure Application application )
{
version = application.version();
}
@Override
public ApplicationEvent createEvent( String name, Object[] args )
{
ValueBuilder<ApplicationEvent> builder = vbf.newValueBuilder( ApplicationEvent.class );
ApplicationEvent prototype = builder.prototype();
prototype.name().set( name );
prototype.on().set( new Date() );
prototype.identity().set( idGenerator.generate( ApplicationEvent.class ) );
UnitOfWork uow = uowf.currentUnitOfWork();
prototype.usecase().set( uow.usecase().name() );
prototype.version().set( version );
// JSON-ify parameters
JSONStringer json = new JSONStringer();
try
{
JSONWriter params = json.object();
for (int i = 1; i < args.length; i++)
{
params.key( "param" + i );
if (args[i] == null)
params.value( JSONObject.NULL );
else
params.value( args[i] );
}
json.endObject();
} catch (JSONException e)
{
throw new IllegalArgumentException( "Could not create event", e );
}
prototype.parameters().set( json.toString() );
ApplicationEvent event = builder.newInstance();
return event;
}
}
}