com.qiniu.api.resumableio.RandomAccessFileUpload Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of sdk Show documentation

Qiniu Resource (Cloud) Storage SDK demo for Java

The newest version!

package com.qiniu.api.resumableio;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class RandomAccessFileUpload extends SliceUpload {
	protected RandomAccessFile file;
	private final Lock fileUploadLock;

	// / 断点续传记录实例
	private String resumeKey;
	private int currentBlockIdx = 0;

	public RandomAccessFileUpload(File file, String token,
			String key, String mimeType) {
		super(token, key, mimeType);
		try {
			this.contentLength = file.length();
			
			this.file = new RandomAccessFile(file, "r");
			fileUploadLock = new ReentrantLock();
			resumeKey = key;
			if(resumeKey == null){
				resumeKey = file.getAbsolutePath();
			}
		} catch (FileNotFoundException e) {
			throw new RuntimeException(e);
		}
	}


	@Override
	protected boolean hasNext() {
		return contentLength > currentBlockIdx * BLOCK_SIZE;
	}
	

	@Override
	protected UploadBlock buildNextBlockUpload() throws IOException {
		long start = currentBlockIdx * BLOCK_SIZE;
		int len = (int) Math.min(BLOCK_SIZE, contentLength - start);
		
		RandomAccessFileUploadBlock fb = new RandomAccessFileUploadBlock(this, httpClient, host,
				currentBlockIdx, start, len, file, fileUploadLock);
		
		currentBlockIdx++;
		
		return fb;
	}


	@Override
	protected void clean() throws Exception {
		if (file != null) {
			file.close();
		}
	}

}