com.alibaba.dubbo.remoting.transport.CodecSupport Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of dubbo2 Show documentation
The all in one project of dubbo2
The newest version!
/*
 * Copyright 1999-2011 Alibaba Group.
 *
 *  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 com.alibaba.dubbo.remoting.transport;

import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import com.alibaba.dubbo.common.Constants;
import com.alibaba.dubbo.common.URL;
import com.alibaba.dubbo.common.extension.ExtensionLoader;
import com.alibaba.dubbo.common.logger.Logger;
import com.alibaba.dubbo.common.logger.LoggerFactory;
import com.alibaba.dubbo.common.serialize.Serialization;

/**
 * @author kimi
 */
public class CodecSupport {

    private static final Logger logger = LoggerFactory.getLogger(CodecSupport.class);

    private CodecSupport() {
    }

    private static Map ID_SERIALIZATION_MAP = new HashMap();

    static {
        Set supportedExtensions = ExtensionLoader.getExtensionLoader(Serialization.class).getSupportedExtensions();
        for (String name : supportedExtensions) {
            Serialization serialization = ExtensionLoader.getExtensionLoader(Serialization.class).getExtension(name);
            byte idByte = serialization.getContentTypeId();
            if (ID_SERIALIZATION_MAP.containsKey(idByte)) {
                logger.error("Serialization extension " + serialization.getClass().getName()
                                 + " has duplicate id to Serialization extension "
                                 + ID_SERIALIZATION_MAP.get(idByte).getClass().getName()
                                 + ", ignore this Serialization extension");
                continue;
            }
            ID_SERIALIZATION_MAP.put(idByte, serialization);
        }
    }

    public static Serialization getSerializationById(Byte id) {
        return ID_SERIALIZATION_MAP.get(id);
    }

    public static Serialization getSerialization(URL url) {
        return ExtensionLoader.getExtensionLoader(Serialization.class).getExtension(
            url.getParameter(Constants.SERIALIZATION_KEY, Constants.DEFAULT_REMOTING_SERIALIZATION));
    }

    public static Serialization getSerialization(URL url, Byte id) {
        Serialization result = getSerializationById(id);
        if (result == null) {
            result = getSerialization(url);
        }
        return result;
    }

}