cz.lbenda.coursing.client.ClientServiceLocator.java Source code

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Here is the source code for cz.lbenda.coursing.client.ClientServiceLocator.java

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/*
 * Copyright 2014 Lukas Benda <lbenda at lbenda.cz>
 *
 * 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 cz.lbenda.coursing.client;

import cz.lbenda.coursing.server.PrepareDB;
import cz.lbenda.coursing.service.SecurityService;
import java.util.Arrays;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.security.core.AuthenticationException;

/**
 *  @author Lukas Benda <lbenda at lbenda.cz>
 */
public class ClientServiceLocator {

    private static final Logger LOG = LoggerFactory.getLogger(ClientServiceLocator.class);

    private final AnnotationConfigApplicationContext ctx;
    private static ClientServiceLocator instance;

    public static ClientServiceLocator getInstance() {
        try {
            if (instance == null) {
                instance = new ClientServiceLocator();
            }
        } catch (Exception e) {
            LOG.error("Error when instance of ClientServiceLocator is created", e);
        }
        return instance;
    }

    //tunnel between our ServiceLocator and Spring - obtain bean from Spring by name
    public Object getBean(String beanName) {
        return this.ctx.getBean(beanName);
    }

    public <T> T getBean(Class<T> serviceInterface) {
        return (T) this.ctx.getBean(serviceInterface.getSimpleName());
    }

    //basic initialization of Spring context
    private ClientServiceLocator() {
        // Check if application have builded server part of application. This application is interpret as standalone.
        Class<?> appConfig = ClientAppConfig.class;
        /* Check if application is in single mode, or server-client mode
        try {
          appConfig = Class.forName("cz.lbenda.coursing.server.ServerAppConfig");
          LOG.info("The libraries contains ServerAppConfig, so the application is in stand alone mode.");
            
        } catch (ClassNotFoundException e) {
          LOG.info("The libraries didn't contains ServerAppConfig, so the application is in Server-Client mode.");
          appConfig = ClientAppConfig.class;
        }
        */
        this.ctx = new AnnotationConfigApplicationContext(appConfig);
        // ctx.refresh();
        LOG.trace("Defined beans: " + Arrays.toString(ctx.getBeanDefinitionNames()));

        SecurityService ss = (SecurityService) ctx.getBean(SecurityService.SERVICE_NAME);
        try {
            ss.login("sys", "sys");
            PrepareDB prepareDB = ctx.getBean(PrepareDB.class);
            prepareDB.prepareDB();
        } catch (AuthenticationException ex) {
            LOG.error("The database is already prepared. If you want new, pleas delete old database: "
                    + ctx.getBean("localDb") + ".mv.db");
        }
        //    ctx.refresh();
    }
}