com.kixeye.chassis.transport.websocket.WebSocketMessageRegistry.java Source code

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Here is the source code for com.kixeye.chassis.transport.websocket.WebSocketMessageRegistry.java

Source

package com.kixeye.chassis.transport.websocket;

/*
 * #%L
 * Java Transport API
 * %%
 * Copyright (C) 2014 KIXEYE, Inc
 * %%
 * 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.
 * #L%
 */

import java.util.Collections;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

import javax.annotation.PostConstruct;

import org.springframework.stereotype.Component;

import com.kixeye.chassis.transport.dto.ServiceError;

/**
 * Holds the messages that are registered in the system.
 * 
 * @author ebahtijaragic
 */
@Component
public class WebSocketMessageRegistry {
    private ConcurrentHashMap<String, String> typeIdToClass = new ConcurrentHashMap<String, String>();
    private ConcurrentHashMap<String, String> classToTypeId = new ConcurrentHashMap<String, String>();

    @PostConstruct
    public void initialize() {
        registerType("error", ServiceError.class);
    }

    /**
     * Gets all the type IDs.
     * 
     * @return
     */
    public Set<String> getTypeIds() {
        return Collections.unmodifiableSet(typeIdToClass.keySet());
    }

    /**
     * Registers a type.
     * 
     * @param name
     * @param type
     */
    public synchronized void registerType(String typeId, Class<?> clazz) {
        typeIdToClass.put(typeId, clazz.getName());
        classToTypeId.put(clazz.getName(), typeId);
    }

    /**
     * Gets a class by the typeid.
     * 
     * @param typeId
     * @return
     */
    public Class<?> getClassByTypeId(String typeId) {
        try {
            String className = typeIdToClass.get(typeId);

            if (className != null) {
                return Class.forName(typeIdToClass.get(typeId));
            } else {
                return null;
            }
        } catch (ClassNotFoundException e) {
            return null;
        }
    }

    /**
     * Returns true if class is registered.
     * 
     * @param clazz
     * @return
     */
    public boolean isClassRegistered(Class<?> clazz) {
        return classToTypeId.contains(clazz.getName());
    }

    /**
     * Gets a typeid by the class.
     * 
     * @param typeId
     * @return
     */
    public String getTypeIdByClass(Class<?> clazz) {
        return classToTypeId.get(clazz.getName());
    }
}