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resize file partition changes #79

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49 changes: 49 additions & 0 deletions ...ain/java/org/onedatashare/transferservice/odstransferservice/service/FilePartitioner.java
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,8 @@
import org.onedatashare.transferservice.odstransferservice.model.FilePart;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Collections;
import java.util.concurrent.ConcurrentLinkedQueue;

import static org.onedatashare.transferservice.odstransferservice.constant.ODSConstants.SIXTYFOUR_KB;
Expand Down Expand Up @@ -70,4 +72,51 @@ public int createParts(long totalSize, String fileName){
return queue.size();
}

public int resizeParts(long totalSize, String fileName, int newChunkSize){
if(totalSize<1) return -1;

synchronized(this.queue){
FilePart firstPart = this.queue.poll();
long startPosition = firstPart.getStart();
long idx = firstPart.getPartIdx();
long sizeLeft = (totalSize-startPosition);
this.queue.clear();
if(sizeLeft<newChunkSize){
FilePart part = new FilePart();
part.setLastChunk(true);
part.setFileName(fileName);
part.setStart(startPosition);
part.setEnd(sizeLeft);
part.setSize(Long.valueOf(totalSize).intValue());
queue.add(part);
}
else{
long chunksOfChunksKB = Math.floorDiv(sizeLeft, newChunkSize);
for(long i = idx; i < idx+chunksOfChunksKB; i++){
FilePart part = new FilePart();
part.setLastChunk(false);
part.setFileName(fileName);
part.setPartIdx(i);
part.setSize(newChunkSize);
part.setStart(startPosition);
startPosition+=newChunkSize-1;
part.setEnd(startPosition);
startPosition++;
this.queue.add(part);
}
FilePart lastChunk = new FilePart();
lastChunk.setStart(startPosition);
lastChunk.setFileName(fileName);
lastChunk.setLastChunk(true);
lastChunk.setSize(Long.valueOf(totalSize-startPosition).intValue());
lastChunk.setPartIdx(idx+chunksOfChunksKB);
lastChunk.setEnd(totalSize);
queue.add(lastChunk);
logger.info(lastChunk.toString());
}
}
logger.info("The total size of the queue after resizing the queue: " + fileName +" " +queue.size());
return queue.size();
}

}