/**
 *  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.apache.isis.applib.services.background;

import org.apache.isis.applib.annotation.Programmatic;

/**
 * Submit actions to be invoked in the background.
 *
 * <p>
 * Example usage:
 * <pre>
 * public void submitInvoices() {
 *     for(Customer customer: customerRepository.findCustomersToInvoice()) {
 *         backgroundService.execute(customer).submitInvoice();
 *     }
 * }
 *
 * &#64;javax.inject.Inject
 * private BackgroundService backgroundService;
 * </pre>
 */
public interface BackgroundService {

    /**
     * Returns a proxy around the object (entity or view model) which is then used to obtain the
     * signature of the action to be invoked in the background.
     *
     * <p>
     *     To obtain a proxy for a mixin, use {@link BackgroundService2#executeMixin(Class, Object)}.
     * </p>
     */
    @Programmatic
    <T> T execute(final T object);

    /**
     * Returns a proxy around the mixin object which is then used to obtain the
     * signature of the action to be invoked in the background.
     */
    @Programmatic
    <T> T executeMixin(Class<T> mixinClass, Object mixedIn);

}
