On 17/04/2014 23:45, Mark Fortner wrote:
Schalk,
It's my understanding that new providers in NIO2 are simply added using the
ServiceLoader.
Cheers,
Mark
Hi Mark,
Maybe I should have explained better,
In Apache VFS one can either add custom providers via a
META-INF/vfs-providers.xml file (behaviour of
StandardFileSystemManager). This means just compiling a JAR accordingly
and have it available on the classpath. Let's call this Approach A.
Alternatively one can call addProvider (on DefaultFileSystemManager)
directly. This is quite useful in certain circumstances to do this
programmatically. This is Approach B.
With NIO2 loading occurs by providing a
META-INF/services/java.nio.file.spi.FileSystemProvider file and
ServiceLoader should take care of it. This is effectively the NIO2 way
of Approach A.
What I am saying is that I would like to have an Approach B for NIO2 as
well, except that I have seen no clear way of accomplishing it. It could
just be a lack of knowledge on my side.
On Thu, Apr 17, 2014 at 3:31 PM, Schalk Cronj é <ysb...@gmail.com> wrote:
On 17/04/2014 22:38, Bernd Eckenfels wrote:
<snip/>
But theoretically both is possible: consume FileSystems as a provider
or implement an adapter which makes a VFS filesystem(manager) to
provide the FileSystem SPI.
I have been playing with that and it looks possible, but it is far from
trivial. The meagre documentation or even lack of published success in
writing NIO2 providers shows that this is a road less travelled. I have
looked at the supplied ZIP example that comes with the JDK and IMHO still
very much prototype code.
I think VFS has some things going for it that I could not see in NIO2 -
even something as simple as having two schemes for one provider. In
addition, adding providers on the fly is easy in VFS, by just calling
addProvider on FilesystemManager. From my initial investigation I could not
see a clear way of doing the equivalent in NIO2. There will be more things
like these, I am sure.
I am very interesting in where this is going in future and the maintainer
of Groovy VFS, I have a vested interest. I might be interested to go to
Budapest in November if this gets discussed.
<snip/>
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Schalk W. Cronjé
@ysb33r
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