79 lines
3.2 KiB
Java
79 lines
3.2 KiB
Java
package com.zdjizhi.function;
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import cn.hutool.json.JSONObject;
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import cn.hutool.json.JSONUtil;
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import cn.hutool.log.Log;
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import cn.hutool.log.LogFactory;
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import com.zdjizhi.pojo.FileChunk;
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import org.apache.flink.api.common.functions.RichMapFunction;
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import org.msgpack.core.MessagePack;
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import org.msgpack.core.MessageUnpacker;
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import java.util.HashMap;
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import java.util.Map;
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public class ParseMessagePackMapFunction extends RichMapFunction<byte[], FileChunk> {
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private static final Log LOG = LogFactory.get();
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@Override
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public FileChunk map(byte[] messagePackData) {
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FileChunk fileChunk;
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try {
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fileChunk = new FileChunk();
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MessageUnpacker messageUnpacker = MessagePack.newDefaultUnpacker(messagePackData);
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int numFields = messageUnpacker.unpackMapHeader();
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Map<String, Object> metaMap = new HashMap<>();
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for (int i = 0; i < numFields; i++) {
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String fieldName = messageUnpacker.unpackString();
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switch (fieldName) {
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case "uuid":
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fileChunk.setUuid(messageUnpacker.unpackString());
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break;
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case "fileName":
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fileChunk.setFileName(messageUnpacker.unpackString());
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break;
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case "fileType":
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fileChunk.setFileType(messageUnpacker.unpackString());
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break;
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case "combineMode":
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fileChunk.setCombineMode(messageUnpacker.unpackString());
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break;
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case "offset":
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fileChunk.setOffset(messageUnpacker.unpackLong());
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break;
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case "length":
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fileChunk.setLength(messageUnpacker.unpackLong());
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break;
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case "lastChunkFlag":
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fileChunk.setLastChunkFlag(messageUnpacker.unpackInt());
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break;
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case "chunk":
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fileChunk.setChunk(messageUnpacker.readPayload(messageUnpacker.unpackRawStringHeader()));
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break;
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case "timestamp":
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fileChunk.setTimestamp(messageUnpacker.unpackLong());
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break;
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case "meta":
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String meta = messageUnpacker.unpackString();
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JSONObject metaJsonObject = JSONUtil.parseObj(meta);
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for (String key : metaJsonObject.keySet()) {
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metaMap.put(key, metaJsonObject.get(key));
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}
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fileChunk.setMeta(metaMap);
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break;
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default:
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messageUnpacker.skipValue();
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break;
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}
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}
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if ("append".equals(fileChunk.getCombineMode())) {
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fileChunk.setLastChunkFlag(0);
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}
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} catch (Exception e) {
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LOG.error("Parse messagePack failed.", e);
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fileChunk = null;
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}
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return fileChunk;
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}
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}
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