/*
 * Copyright (C) 2015 Red Hat, Inc. and/or its affiliates.
 *
 * 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.jboss.errai.demo.todo.server;

import java.util.List;

import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

import org.jboss.errai.jpa.sync.client.shared.DataSyncService;
import org.jboss.errai.jpa.sync.client.shared.JpaAttributeAccessor;
import org.jboss.errai.jpa.sync.client.shared.SyncRequestOperation;
import org.jboss.errai.jpa.sync.client.shared.SyncResponse;
import org.jboss.errai.jpa.sync.client.shared.SyncableDataSet;
import org.jboss.errai.jpa.sync.server.JavaReflectionAttributeAccessor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Stateless
public class DataSyncEjb {

  private static final Logger log = LoggerFactory.getLogger(DataSyncEjb.class);

  @PersistenceContext
  private EntityManager em;

  private final JpaAttributeAccessor attributeAccessor = new JavaReflectionAttributeAccessor();

  public <E> List<SyncResponse<E>> coldSync(SyncableDataSet<E> dataSet, List<SyncRequestOperation<E>> remoteResults) {
    log.debug("Doing a cold sync!");
    DataSyncService dss = new org.jboss.errai.jpa.sync.server.DataSyncServiceImpl(em, attributeAccessor);
    return dss.coldSync(dataSet, remoteResults);
  }

}