com.weibo.api.motan.codec.AbstractCodec.java Source code

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Here is the source code for com.weibo.api.motan.codec.AbstractCodec.java

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/*
 *  Copyright 2009-2016 Weibo, 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.
 */

package com.weibo.api.motan.codec;

import com.weibo.api.motan.core.extension.ExtensionLoader;
import com.weibo.api.motan.exception.MotanErrorMsgConstant;
import com.weibo.api.motan.exception.MotanFrameworkException;
import com.weibo.api.motan.exception.MotanServiceException;
import com.weibo.api.motan.util.LoggerUtil;
import org.apache.commons.lang3.StringUtils;

import java.io.*;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;

/**
 * @author maijunsheng
 * @version 2013-5-24
 */
public abstract class AbstractCodec implements Codec {
    protected static ConcurrentHashMap<Integer, String> serializations;

    protected void serialize(ObjectOutput output, Object message, Serialization serialize) throws IOException {
        if (message == null) {
            output.writeObject(null);
            return;
        }

        output.writeObject(serialize.serialize(message));
    }

    protected Object deserialize(byte[] value, Class<?> type, Serialization serialize) throws IOException {
        if (value == null) {
            return null;
        }

        return serialize.deserialize(value, type);
    }

    public ObjectOutput createOutput(OutputStream outputStream) {
        try {
            return new ObjectOutputStream(outputStream);
        } catch (Exception e) {
            throw new MotanFrameworkException(this.getClass().getSimpleName() + " createOutput error", e,
                    MotanErrorMsgConstant.FRAMEWORK_ENCODE_ERROR);
        }
    }

    public ObjectInput createInput(InputStream in) {
        try {
            return new ObjectInputStream(in);
        } catch (Exception e) {
            throw new MotanFrameworkException(this.getClass().getSimpleName() + " createInput error", e,
                    MotanErrorMsgConstant.FRAMEWORK_DECODE_ERROR);
        }
    }

    protected static synchronized void initAllSerialziation() {
        if (serializations == null) {
            serializations = new ConcurrentHashMap<Integer, String>();
            try {
                ExtensionLoader<Serialization> loader = ExtensionLoader.getExtensionLoader(Serialization.class);
                List<Serialization> exts = loader.getExtensions(null);
                for (Serialization s : exts) {
                    String old = serializations.put(s.getSerializationNumber(), loader.getSpiName(s.getClass()));
                    if (old != null) {
                        LoggerUtil.warn("conflict serialization spi! serialization num :"
                                + s.getSerializationNumber() + ", old spi :" + old + ", new spi :"
                                + serializations.get(s.getSerializationNumber()));
                    }
                }
            } catch (Exception e) {
                LoggerUtil.warn("init all serialzaion fail!", e);
            }
        }
    }

    protected Serialization getSerializaiontByNum(int serializationNum) {
        if (serializations == null) {
            initAllSerialziation();
        }
        String name = serializations.get(serializationNum);
        Serialization s = null;
        if (StringUtils.isNotBlank(name)) {
            s = ExtensionLoader.getExtensionLoader(Serialization.class).getExtension(name);
        }
        if (s == null) {
            throw new MotanServiceException("can not found serialization extention by num " + serializationNum);
        }
        return s;
    }

}