util.ServerAppConfig.java Source code

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Here is the source code for util.ServerAppConfig.java

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/*
 * eGovFrame Web Messager
 * Copyright The eGovFrame Open Community (http://open.egovframe.go.kr)).
 *
 * 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.
 *
 * @author ??(??K3)
 */
package util;

import java.util.Map;

import javax.websocket.server.ServerEndpointConfig.Configurator;

import org.springframework.web.context.ContextLoader;
import org.springframework.web.context.WebApplicationContext;

/**
* @Class Name : ServerAppConfig.java
* @Description : EndPoint bean    Configurator( Bean ?  EndPoint?  )
* @Modification Information
*
*    ?       ?         
*    -------        -------     -------------------
*    2014. 11. 27.    ??
*
*/
//container? bean? DI  
public class ServerAppConfig extends Configurator {

    @Override
    public <T> T getEndpointInstance(Class<T> endpointClass) throws InstantiationException {

        WebApplicationContext wac = ContextLoader.getCurrentWebApplicationContext();
        if (wac == null) {
            throw new IllegalStateException("Failed to find WebApplicationContext. "
                    + "Was org.springframework.web.context.ContextLoader used to load the WebApplicationContext?");
        }

        Map<String, T> beans = wac.getBeansOfType(endpointClass);
        if (beans.isEmpty()) {
            // Initialize a new bean instance
            return wac.getAutowireCapableBeanFactory().createBean(endpointClass);
        }
        if (beans.size() == 1) {
            // Return the matching bean instance
            return beans.values().iterator().next();
        } else {
            // This should never happen (@ServerEndpoint has a single path mapping) ..
            throw new IllegalStateException("Found more than one matching beans of type " + endpointClass);
        }
    }
}