On Mon, 7 Jul 2025 09:32:33 GMT, Volkan Yazici <[email protected]> wrote:
>> Adds a new `ofFileChannel(FileChannel channel, long offset, long length)`
>> method to `java.net.HttpRequest.BodyPublishers` to provide an `HttpClient`
>> publisher to upload a certain region of a file. The new publisher does not
>> modify the state of the passed `FileChannel`, streams the file channel bytes
>> as it publishes (i.e., avoids reading the entire file into the memory), and
>> can be leveraged to implement sliced uploads. As noted in the Javadoc:
>>
>>> The file channel will not be closed upon completion. The caller is
>>> expected to manage the life cycle of the channel, and close it
>>> appropriately when not needed anymore.
>>
>> ### Implementation notes
>>
>> - `FileChannel` is preferred over `{Readable,Seekable}ByteChannel`, since
>> the latter does not provide a positional read without modifying the state of
>> the `FileChannel`, which is necessary to use a single `FileChannel` instance
>> to implement sliced uploads.
>> - `ofFileChannel(FileChannel,long,long)` is preferred over
>> `ofPath(Path,long,long)` to avoid overloading the maximum file descriptor
>> limit of the platform.
>
> Volkan Yazici has updated the pull request incrementally with one additional
> commit since the last revision:
>
> Implement review feedback
src/java.net.http/share/classes/java/net/http/HttpRequest.java line 743:
> 741: * @throws IndexOutOfBoundsException if the specified byte range
> is
> 742: * found to be out of bounds compared with the size of the file
> 743: * referred by the channel
So we accept length = 0 (OK though not very useful?) and we reject length < 0
(which is good). Maybe we should say:
Suggestion:
* @throws IndexOutOfBoundsException if the specified byte range is
* found to be {@linkplain Objects.checkFromIndexSize(long, long, long)
out of bounds}
* compared with the size of the file referred by the channel
to clarify that.
-------------
PR Review Comment: https://git.openjdk.org/jdk/pull/26155#discussion_r2189525585
