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https://issues.apache.org/jira/browse/HTTPCORE-43?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12488183
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Oleg Kalnichevski commented on HTTPCORE-43:
-------------------------------------------
Hi Andrea,
My very _preliminary_ plan was to provide a set of extended interfaces, which
codecs capable of making an effective use of FileChannel (such as content
length delimited and identity) may opt to implement in addition to base
interfaces. Something along these lines
public interface FileContentDecoder extends ContentDecoder {
long read(FileChannel channel, long position, long count) throws
IOException;
}
public interface FileContentEncoder extends ContentEncoder {
long write(FileChannel channel, long position, long count) throws
IOException;
}
public class IdentityEncoder extends AbstractContentEncoder implements
FileContentEncoder {
private final WritableByteChannel channel;
...
public IdentityEncoder(final WritableByteChannel channel) {
super();
if (channel == null) {
throw new IllegalArgumentException("Channel may not be null");
}
this.channel = channel;
}
public long write(final FileChannel filechannel, long position, long count)
throws IOException {
if (channel == null) {
return 0;
}
assertNotCompleted();
return filechannel.transferTo(position, count, this.channel);
}
...
}
If you were willing to take the first stab at it, it would be terrific.
Oleg
> Implement support for FileChannel#transferFrom and FileChannel#transferTo
> -------------------------------------------------------------------------
>
> Key: HTTPCORE-43
> URL: https://issues.apache.org/jira/browse/HTTPCORE-43
> Project: HttpComponents Core
> Issue Type: Improvement
> Components: HttpCore
> Reporter: Oleg Kalnichevski
> Fix For: 4.0-alpha5
>
>
> Implement optional support for FileChannel#transferFrom and
> FileChannel#transferTo operations. Direct coping from and to FileChannel is
> believed to result in a significant performance improvement for file bound
> operations
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