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Date: Wed, 23 Jul 2008 11:01:48 -0400
From: "Nick Stuart" <nstuart@speranzasystems.com>
To: users@jackrabbit.apache.org
Subject: Re: saving files
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Well the only thats really different between that and my code is setting
mimeType and encoding to empty. I don't touch the encoding at all, and
always set the mimeType to something even if it is just text/plain. Other
then that it looks about the same. Try hardcoding at least mimeType to
'text/plain' and remove the encoding bit and see if you get better results.
That may be screwing up the retrieval bit, not sure why it would though.

-Nick

On Wed, Jul 23, 2008 at 10:56 AM, Michael Harris <michael.e.harris@gmail.com>
wrote:

> yeah man I tried writing the retrieved stream to a file, it is empty.  The
> file that I save definitely has content (confirmed by less).
>
> Perhaps you can take a look see (the code isn't complicated); having more
> experience than me you could identify obvious problems pretty quickly.
>
> here is the save code
>
>    public void saveFile(File file, Session session) throws Exception {
>        // create the file node - see section 6.7.22.6 of the spec
>
>        Node folderNode = session.getRootNode();
>        Node fileNode = folderNode.addNode(file.getName(), "nt:file");
>
>        // create the mandatory child node - jcr:content
>        Node resNode = fileNode.addNode("jcr:content", "nt:resource");
>        resNode.setProperty("jcr:mimeType", "");
>        resNode.setProperty("jcr:encoding", "");
>         FileInputStream fileInputStream = new FileInputStream(file);
>        resNode.setProperty("jcr:data", fileInputStream);
>         Calendar lastModified = Calendar.getInstance();
>        lastModified.setTimeInMillis(file.lastModified());
>        resNode.setProperty("jcr:lastModified", lastModified);
>
>         session.save();
>    }
>
> and here is the test code
>
>    protected void setUp() throws Exception {
>        super.setUp();
>        String testFileName = "/tmp/" + getName() + ".txt";
>        FileWriter fw = new FileWriter(testFileName);
>        fw.write("some content");
>        fw.flush();
>        testFile = new File(testFileName);
>    }
>
>
>    public void testSaveFile() throws Exception {
>        Session session = getSession();
>        dao.saveFile(testFile, session);
>
>        Node root = session.getRootNode();
>         Node fileNode = root.getNode(testFile.getName());
>        Node fileDetails = fileNode.getNode("jcr:content");
>
>        Property fileProp = fileDetails.getProperty("jcr:data");
>         InputStream retrievedStream = fileProp.getStream();
>
>        FileOutputStream fos = new
> FileOutputStream("/tmp/retrievedFile.txt");
>        byte[] buf = new byte[256];
>        int read = 0;
>        while ((read = retrievedStream.read(buf)) > 0) {
>            fos.write(buf, 0, read);
>            fos.flush();
>        }
>
>
>    }
>
> On Wed, Jul 23, 2008 at 10:38 AM, Nick Stuart <nstuart@speranzasystems.com
> >
> wrote:
>
> > I know that works as I've used it extensively. I am on a 1.5 build, but
> it
> > was working with the 1.4.x build I started with. Have you looked at the
> > stream going in to make sure something is actually being saved? You
> > obviously have the node and property there or otherwise you would be
> > getting
> > a RepositoryException.
> >
> > I would check to make sure you are saving everything you think you are.
> > Also, try just using the stream and ignore the debugger (it might be
> lying
> > to you, who knows). But it looks like everything is in order.
> >
> > On Wed, Jul 23, 2008 at 10:35 AM, Michael Harris <
> > michael.e.harris@gmail.com>
> > wrote:
> >
> > > Nick
> > >
> > > thanx for the reply.  when I do that and inspect the returned stream in
> > the
> > > eclipse debugger there is nothing in it.
> > >
> > > michael.
> > >
> > >
> > >
> > > On Wed, Jul 23, 2008 at 10:22 AM, Nick Stuart <
> > nstuart@speranzasystems.com
> > > >
> > > wrote:
> > >
> > > > All you can really do is retrieve the InputStream for said file.
> Which
> > > > should be enough, and the nodes hold the rest of the info if you need
> > it
> > > > obviously (file name, type, etc).
> > > >
> > > > Something like:
> > > >
> > > > Node resNode = fileNode.getNode("jcr:content");
> > > > resNode.getProperty("jcr:data").getStream();
> > > >
> > > > Where fileNode is the jcr:file node type. You wont be able to
> actually
> > > get
> > > > a
> > > > File object becuase thats part of JCR, that it extracts that stuff
> away
> > > > from
> > > > you, and you just deal with the contents and info.
> > > >
> > > > -Nick
> > > >
> > > > On Wed, Jul 23, 2008 at 10:16 AM, Michael Harris <
> > > > michael.e.harris@gmail.com>
> > > > wrote:
> > > >
> > > > > ladies and gentlemen
> > > > >
> > > > > its still not obvious to me how to retrieve the saved file.  Can
> > > someone
> > > > > please illuminate the situation?
> > > > >
> > > > > thanx in advance.
> > > > >
> > > > > On Tue, Jul 22, 2008 at 3:05 PM, Michael Harris <
> > > > > michael.e.harris@gmail.com>
> > > > > wrote:
> > > > >
> > > > > > comments inline below.  Thank you for the response.
> > > > > >
> > > > > > On Tue, Jul 22, 2008 at 2:20 PM, Julian Reschke <
> > > julian.reschke@gmx.de
> > > > >
> > > > > > wrote:
> > > > > >
> > > > > >> Michael Harris wrote:
> > > > > >>
> > > > > >>> hey all,
> > > > > >>>
> > > > > >>> more newb questions here.
> > > > > >>> Want to save a file in the repository.  found this on the wiki
> > > > > >>>
> > > > > >>> Node folderNode = session.getRootNode();
> > > > > >>>        Node fileNode = folderNode.addNode(file.getName(),
> > > "nt:file");
> > > > > >>>
> > > > > >>>        // create the mandatory child node - jcr:content
> > > > > >>>        Node resNode = fileNode.addNode("jcr:content",
> > > "nt:resource");
> > > > > >>>        resNode.setProperty("jcr:mimeType", "");
> > > > > >>>        resNode.setProperty("jcr:encoding", "");
> > > > > >>>
> > > > > >> > ...
> > > > > >>
> > > > > >> That is very bad advice. If you don't know mimeType or encoding,
> > do
> > > > not
> > > > > >> set it.
> > > > > >
> > > > > >
> > > > > >> Where did you find that?
> > > > > >>
> > > > > >
> > > > > > I got the code from the wiki.  It had the mimetype and the
> encoding
> > > > type.
> > > > > > I modified the code and just put empty strings in for now.
> > > > > >
> > > > > >
> > > > > >
> > > > > >>
> > > > > >>         resNode.setProperty("jcr:data", new
> > FileInputStream(file));
> > > > > >>>        Calendar lastModified = Calendar.getInstance();
> > > > > >>>        lastModified.setTimeInMillis(file.lastModified());
> > > > > >>>        resNode.setProperty("jcr:lastModified", lastModified);
> > > > > >>>
> > > > > >>> Is the file itself being put in the repository (jcr.data) or
> just
> > > the
> > > > > >>> content?
> > > > > >>>
> > > > > >>
> > > > > >> The contents.
> > > > > >>
> > > > > >>  Do I even need the resNode?  Can I just save the file into the
> > > > > fileNode?
> > > > > >>>
> > > > > >>
> > > > > >> Not unless you use a different node type.
> > > > > >>
> > > > > >
> > > > > > So does it mean anything to say "Can I save the file itself?"
> > > > > >
> > > > > >
> > > > > > so the above code I put into a DAO method saveFile(File,
> Session).
> > >  In
> > > > > the
> > > > > > test for that method, i have
> > > > > >
> > > > > >         Node root = session.getRootNode();
> > > > > >         // testFile is the file in the Dao
> > > > > >         Node fileNode = root.getNode(testFile.getName());
> > > > > >         Node fileDetails = fileNode.getNode("jcr:content");
> > > > > >
> > > > > >         Property fileProp = fileDetails.getProperty("jcr:data");
> > > > > >
> > > > > > I am trying to get at the file contents, which is just a string
> > "some
> > > > > > content".
> > > > > >
> > > > > > on the property retrieved I dont see the file content (Im in
> > > eclipse's
> > > > > > debugger).  How do I retrieve the file.  What would a
> > > > > > loadFile(Session, filename) method look like?
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >>  Finally, we are going to need to lock the file (which is why we
> > are
> > > > > using
> > > > > >>> jcr).  Is it possible to attach info (like who owns the lock)
> to
> > > the
> > > > > >>> locked
> > > > > >>> file?
> > > > > >>>
> > > > > >>
> > > > > >> To some extent, that's part of the JCR locking model (it
> remembers
> > > who
> > > > > >> owns the lock, and exposes the information both in the API and
> on
> > > > > properties
> > > > > >> defined in mix:lockable).
> > > > > >>
> > > > > >>  Thanx.  This community has been quite helpful.
> > > > > >>>
> > > > > >>
> > > > > >> BR, Julian
> > > > > >>
> > > > > >
> > > > > >
> > > > > >
> > > > > > --
> > > > > > ---------------------
> > > > > > Michael Harris
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > > --
> > > > > ---------------------
> > > > > Michael Harris
> > > > >
> > > >
> > >
> > >
> > >
> > > --
> > > ---------------------
> > > Michael Harris
> > >
> >
>
>
>
> --
> ---------------------
> Michael Harris
>

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