# JettyServiceAssembler.java

    /*
     * Copyright 2008 Edward Yakop.
     * Copyright 2011-2014 Paul Merlin.
     *
     * 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.http;

    import org.eclipse.jetty.server.Server;
    import org.qi4j.api.common.Visibility;
    import org.qi4j.api.service.importer.InstanceImporter;
    import org.qi4j.bootstrap.Assemblers;
    import org.qi4j.bootstrap.AssemblyException;
    import org.qi4j.bootstrap.ImportedServiceDeclaration;
    import org.qi4j.bootstrap.ModuleAssembly;
    import org.qi4j.bootstrap.ServiceDeclaration;

    public class JettyServiceAssembler
        extends Assemblers.VisibilityIdentityConfig<JettyServiceAssembler>
    {
        protected ModuleAssembly serverModule;
        protected Visibility serverVisibility = Visibility.module;
        protected String serverIdentity;

        /**
         * @param serverModule Defaults to assembled module
         * @param serverVisibility Defaults to {@link Visibility#module}
         */
        public JettyServiceAssembler withServer( ModuleAssembly serverModule, Visibility serverVisibility )
        {
            this.serverModule = serverModule;
            this.serverVisibility = serverVisibility;
            return this;
        }

        public JettyServiceAssembler serverIdentifiedBy( String serverIdentity )
        {
            this.serverIdentity = serverIdentity;
            return this;
        }

        @Override
        public final void assemble( ModuleAssembly module )
            throws AssemblyException
        {
            ServiceDeclaration service = module.services( httpService() ).
                visibleIn( visibility() ).
                instantiateOnStartup();
            if( hasIdentity() )
            {
                service.identifiedBy( identity() );
            }
            if( hasConfig() )
            {
                configModule().entities( configurationEntity() ).visibleIn( configVisibility() );
            }
            assembleServer( module );
        }

        protected final void assembleServer( ModuleAssembly module )
        {
            serverModule = serverModule != null ? serverModule : module;
            ImportedServiceDeclaration server = serverModule.importedServices( Server.class ).
                importedBy( InstanceImporter.class ).
                setMetaInfo( new Server() ).
                visibleIn( serverVisibility );
            if( serverIdentity != null )
            {
                server.identifiedBy( serverIdentity );
            }
        }

        protected Class<? extends JettyConfiguration> configurationEntity()
        {
            return JettyConfiguration.class;
        }

        protected Class<? extends JettyService> httpService()
        {
            return JettyService.class;
        }
    }