com.liulishuo.filedownloader.util

Interface FileDownloadHelper.IdGenerator

All Known Implementing Classes:

DefaultIdGenerator

Enclosing class:

FileDownloadHelper

public static interface FileDownloadHelper.IdGenerator

Method Summary

Modifier and Type	Method and Description
int	generateId(String url, String path, boolean pathAsDirectory) Invoke this method when there is a new task from very beginning.
int	transOldId(int oldId, String url, String path, boolean pathAsDirectory) Invoke this method when the data is restoring from the database.

Method Detail

transOldId

int transOldId(int oldId,
               String url,
               String path,
               boolean pathAsDirectory)

Invoke this method when the data is restoring from the database.

Parameters:

oldId - the old download id which is generated through the different.

url - the url path.

path - the download path.

pathAsDirectory - true: if the path is absolute directory to store the downloading file, and the filename will be found in contentDisposition from the response as default, if can't find contentDisposition,the filename will be generated by FileDownloadUtils.generateFileName(String) with url.

false: if the path = (absolute directory/filename)

Returns:

the new download id.

generateId

int generateId(String url,
               String path,
               boolean pathAsDirectory)

Invoke this method when there is a new task from very beginning.

Important Ting: this method would be used on the FileDownloadService and the upper-layer, so as default FileDownloadService is running on the `:filedownloader` process, and upper-layer is on the user process, in this case, if you want to cache something on this instance, it would be two different caches on two processes.

Tips: if you want the FileDownloadService runs on the upper-layer process too, just config process.non-separate=true on the filedownloader.properties, more detail please move to FileDownloadProperties

Parameters:

url - the download url.

path - the download path.

pathAsDirectory - true: if the path is absolute directory to store the downloading file, and the filename will be found in contentDisposition from the response as default, if can't find contentDisposition,the filename will be generated by FileDownloadUtils.generateFileName(String) with url.

false: if the path = (absolute directory/filename)

Returns:

the download task identify.