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package com.zdjizhi.function;
import cn.hutool.core.util.PrimitiveArrayUtil;
import cn.hutool.log.Log;
import cn.hutool.log.LogFactory;
import com.zdjizhi.pojo.FileChunk;
import org.apache.commons.lang.StringUtils;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.metrics.Counter;
import org.apache.flink.metrics.MeterView;
import org.apache.flink.metrics.MetricGroup;
import org.apache.flink.streaming.api.functions.windowing.ProcessWindowFunction;
import org.apache.flink.streaming.api.windowing.windows.TimeWindow;
import org.apache.flink.util.Collector;
import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.StreamSupport;
import static com.zdjizhi.utils.PublicConstants.COMBINE_MODE_SEEK;
public class CombineChunkProcessWindowFunction extends ProcessWindowFunction<FileChunk, FileChunk, String, TimeWindow> {
private static final Log LOG = LogFactory.get();
public transient Counter completeFilesCounter;
public transient Counter completeEmlFilesCounter;
public transient Counter completeTxtFilesCounter;
public transient Counter startChunksCounter;
public transient Counter endChunksCounter;
public transient Counter chunksInCounter;
public transient Counter chunksOutCounter;
public transient Counter bytesInCounter;
public transient Counter bytesOutCounter;
public transient Counter duplicateChunksCounter;
public transient Counter errorChunksCounter;
public transient Counter nullChunksCounter;
public transient Counter nullTxtChunksCounter;
public transient Counter nullEmlChunksCounter;
@Override
public void open(Configuration parameters) throws Exception {
super.open(parameters);
MetricGroup metricGroup = getRuntimeContext().getMetricGroup().addGroup("file_chunk_combiner", "window_combine_chunk");
startChunksCounter = metricGroup.counter("startChunksCount");
endChunksCounter = metricGroup.counter("endChunksCount");
duplicateChunksCounter = metricGroup.counter("duplicateChunksCount");
errorChunksCounter = metricGroup.counter("errorChunksCount");
chunksInCounter = metricGroup.counter("chunksInCount");
chunksOutCounter = metricGroup.counter("chunksOutCount");
bytesInCounter = metricGroup.counter("bytesInCount");
bytesOutCounter = metricGroup.counter("bytesOutCount");
completeFilesCounter = metricGroup.counter("completeFilesCount");
completeEmlFilesCounter = metricGroup.counter("completeEmlFilesCount");
completeTxtFilesCounter = metricGroup.counter("completeTxtFilesCount");
metricGroup.meter("numCompleteFilesOutPerSecond", new MeterView(completeFilesCounter));
metricGroup.meter("numCompleteEmlFilesOutPerSecond", new MeterView(completeEmlFilesCounter));
metricGroup.meter("numCompleteTxtFilesOutPerSecond", new MeterView(completeTxtFilesCounter));
metricGroup.meter("numStartChunksOutPerSecond", new MeterView(startChunksCounter));
metricGroup.meter("numEndChunksOutPerSecond", new MeterView(endChunksCounter));
metricGroup.meter("numChunksInPerSecond", new MeterView(chunksInCounter));
metricGroup.meter("numChunksOutPerSecond", new MeterView(chunksOutCounter));
metricGroup.meter("numBytesInPerSecond", new MeterView(bytesInCounter));
metricGroup.meter("numBytesOutPerSecond", new MeterView(bytesOutCounter));
metricGroup.meter("numErrorChunksPerSecond", new MeterView(errorChunksCounter));
metricGroup.meter("numDuplicateChunksInPerSecond", new MeterView(duplicateChunksCounter));
nullChunksCounter = metricGroup.counter("nullChunksCount");
nullEmlChunksCounter = metricGroup.counter("nullTxtChunksCount");
nullTxtChunksCounter = metricGroup.counter("nullEmlChunksCount");
metricGroup.meter("numNullFilesOutPerSecond", new MeterView(nullChunksCounter));
metricGroup.meter("numNullEmlFilesOutPerSecond", new MeterView(nullEmlChunksCounter));
metricGroup.meter("numNullTxtFilesOutPerSecond", new MeterView(nullTxtChunksCounter));
}
@Override
public void process(String string, Context context, Iterable<FileChunk> elements, Collector<FileChunk> out) {
List<FileChunk> fileChunks = combine(elements);
for (FileChunk fileChunk : fileChunks) {
calculateFileChunkMetrics(fileChunk);
out.collect(fileChunk);
}
}
private List<FileChunk> combine(Iterable<FileChunk> input) {
List<FileChunk> combinedFileChunkList = new ArrayList<>();
List<FileChunk> originalFileChunkList = StreamSupport.stream(input.spliterator(), false).collect(Collectors.toList());
chunksInCounter.inc(originalFileChunkList.size());
try {
List<byte[]> waitingToCombineChunkList = new ArrayList<>();
if (COMBINE_MODE_SEEK.equals(originalFileChunkList.get(0).getCombineMode())) {
// 按照offset排序
originalFileChunkList.sort(Comparator.comparingLong(FileChunk::getOffset));
Iterator<FileChunk> originalFileChunkIterator = originalFileChunkList.iterator();
if (originalFileChunkIterator.hasNext()) {
int duplicateCount = 0;
FileChunk currentFileChunk = originalFileChunkIterator.next();
bytesInCounter.inc(currentFileChunk.getLength());
int lastChunkFlag = currentFileChunk.getLastChunkFlag();
long startOffset = currentFileChunk.getOffset();
if (currentFileChunk.getChunk() != null && currentFileChunk.getChunk().length > 0) {
waitingToCombineChunkList.add(currentFileChunk.getChunk());
}
while (originalFileChunkIterator.hasNext()) {
long expectedOffset = currentFileChunk.getOffset() + currentFileChunk.getLength();
currentFileChunk = originalFileChunkIterator.next();
bytesInCounter.inc(currentFileChunk.getLength());
long actualOffset = currentFileChunk.getOffset();
if (expectedOffset > actualOffset) {// 期望offset大于当前offset，该块为重复块，跳过该块
duplicateCount++;
duplicateChunksCounter.inc();
} else if (expectedOffset == actualOffset) {// 期望offset等于当前offset，将该块添加到待合并集合中
if (currentFileChunk.getLastChunkFlag() == 1) {
lastChunkFlag = currentFileChunk.getLastChunkFlag();
}
if (currentFileChunk.getChunk() != null && currentFileChunk.getChunk().length > 0) {
waitingToCombineChunkList.add(currentFileChunk.getChunk());
}
} else {// 期望offset小于当前offset，说明缺块
if (!waitingToCombineChunkList.isEmpty()) {//将可合并的chunk合并，清空集合
FileChunk fileChunk = combineChunk(waitingToCombineChunkList, currentFileChunk.getUuid(), currentFileChunk.getFileName(), currentFileChunk.getFileType(), startOffset, currentFileChunk.getCombineMode(), lastChunkFlag, originalFileChunkList.get(0).getMeta(), currentFileChunk.getTimestamp(), null);
if (fileChunk != null) {
combinedFileChunkList.add(fileChunk);
}
waitingToCombineChunkList.clear();
} else {
if (lastChunkFlag == 1) {
combinedFileChunkList.add(currentFileChunk);
}
}
// 将当前块作为第一个块，继续合并
startOffset = currentFileChunk.getOffset();// 重置起始offset
lastChunkFlag = currentFileChunk.getLastChunkFlag();
if (currentFileChunk.getChunk() != null && currentFileChunk.getChunk().length > 0) {
waitingToCombineChunkList.add(currentFileChunk.getChunk());
}
}
}
if (!waitingToCombineChunkList.isEmpty()) {
FileChunk fileChunk = combineChunk(waitingToCombineChunkList, currentFileChunk.getUuid(), currentFileChunk.getFileName(), currentFileChunk.getFileType(), startOffset, currentFileChunk.getCombineMode(), lastChunkFlag, originalFileChunkList.get(0).getMeta(), currentFileChunk.getTimestamp(), null);
if (fileChunk != null) {
combinedFileChunkList.add(fileChunk);
}
} else {
if (lastChunkFlag == 1) {
combinedFileChunkList.add(currentFileChunk);
}
}
if (duplicateCount > 0) {
LOG.error("Duplicate upload chunk, uuid=" + currentFileChunk.getUuid() + ", repetitionCount=" + duplicateCount);
}
}
} else {
// 按timestamp排序
originalFileChunkList.sort(Comparator.comparingLong(FileChunk::getTimestamp));
long startTimestamp = originalFileChunkList.get(0).getTimestamp();
StringBuilder timestampAndSizes = new StringBuilder();
for (FileChunk originalFileChunk : originalFileChunkList) {
bytesInCounter.inc(originalFileChunk.getLength());
byte[] chunk = originalFileChunk.getChunk();
if (chunk != null && chunk.length > 0) {
chunk = originalFileChunk.getChunk();
waitingToCombineChunkList.add(chunk);
timestampAndSizes.append(originalFileChunk.getTimestamp()).append("-").append(chunk.length).append(";");
}
}
if (!waitingToCombineChunkList.isEmpty()) {
FileChunk fileChunk = combineChunk(waitingToCombineChunkList, originalFileChunkList.get(0).getUuid(), originalFileChunkList.get(0).getFileName(), originalFileChunkList.get(0).getFileType(), 0, "append", 0, originalFileChunkList.get(0).getMeta(), startTimestamp, timestampAndSizes.toString());
if (fileChunk != null) {
combinedFileChunkList.add(fileChunk);
}
}
}
chunksOutCounter.inc(combinedFileChunkList.size());
} catch (Exception e) {
LOG.error("Combiner chunk error. uuid: " + originalFileChunkList.get(0).getUuid() + ", chunk count: " + originalFileChunkList.size() + ". ", e);
errorChunksCounter.inc(originalFileChunkList.size());
}
return combinedFileChunkList;
}
private FileChunk combineChunk(List<byte[]> byteList, String uuid, String fileName, String fileType, long offset, String combineMode, int lastChunkFlag, Map<String, Object> metaMap, long startTimestamp, String chunkNumbers) {
FileChunk fileChunk = new FileChunk();
try {
fileChunk.setChunkCount(byteList.size());
byte[][] bytes = new byte[byteList.size()][];
byteList.toArray(bytes);
byte[] newData = PrimitiveArrayUtil.addAll(bytes);
if (COMBINE_MODE_SEEK.equals(combineMode)) {
fileChunk.setOffset(offset);
fileChunk.setLastChunkFlag(lastChunkFlag);
} else {
if (StringUtils.isNotEmpty(chunkNumbers)) {
fileChunk.setChunkNumbers(chunkNumbers);
}
}
fileChunk.setTimestamp(startTimestamp);
fileChunk.setFileType(fileType);
fileChunk.setUuid(uuid);
fileChunk.setChunk(newData);
fileChunk.setFileName(fileName);
fileChunk.setCombineMode(combineMode);
fileChunk.setLength(newData.length);
fileChunk.setMeta(metaMap);
bytesOutCounter.inc(newData.length);
} catch (Exception e) {
LOG.error("Combiner chunk error. uuid: " + uuid + ", chunk count: " + byteList.size() + ". ", e);
errorChunksCounter.inc(byteList.size());
fileChunk = null;
}
return fileChunk;
}
private void calculateFileChunkMetrics(FileChunk fileChunk) {
long offset = fileChunk.getOffset();
int lastChunkFlag = fileChunk.getLastChunkFlag();
String fileType = fileChunk.getFileType();
if (offset == 0 && lastChunkFlag == 1) {
completeFilesCounter.inc();
if ("eml".equals(fileType)) {
completeEmlFilesCounter.inc();
} else if ("txt".equals(fileType)) {
completeTxtFilesCounter.inc();
}
if (fileChunk.getChunk() == null) {
nullChunksCounter.inc();
if ("eml".equals(fileType)) {
nullEmlChunksCounter.inc();
} else if ("txt".equals(fileType)) {
nullTxtChunksCounter.inc();
}
LOG.info("send file data is null. " + fileChunk.toString());
}
} else if (offset == 0) {
startChunksCounter.inc();
} else if (lastChunkFlag == 1) {
endChunksCounter.inc();
}
}
}
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