Question

I’m using following snippet for saving content:

private void writeToFile(NodeRef nodeRef, String content) throws IOException {
    ContentWriter writer = contentService.getWriter(nodeRef, ContentModel.PROP_CONTENT, true);
    InputStream contentStream = new ByteArrayInputStream(content.getBytes(encoding));

    writer.setMimetype(mimeType);
    writer.setEncoding(encoding);
    writer.putContent(contentStream);

    Map<QName, Serializable> repoProps = nodeService.getProperties(nodeRef);

    ContentData contentData = (ContentData) repoProps.get(ContentModel.PROP_CONTENT);
    if(contentData == null)
        contentData = writer.getContentData();

    contentData = ContentData.setEncoding(contentData, encoding);
    contentData = ContentData.setMimetype(contentData, mimeType);
    repoProps.put(ContentModel.PROP_CONTENT, contentData);

    contentStream.close();

    nodeService.setProperties(nodeRef, repoProps);
}

When I read content written this way within short period of time (depends on server load) in other place, old content is returned. So it looks like that maybe indexing is in progress, so before final commit old content is returned, is that possible? If so, is it possible to override this behavior and access newest possible content? Via contentUrl?

To avoid this behavior I’m using thread for each read request, which sleeps for some time at the beginning, but I really dislike this “solution”.

Edit: I built from newest SVN source, running on Tomcat 6.0.35 on Linux (CentOS and Ubuntu); system load – i mean hundreds of files changing every few seconds.

Edit: reading looks like this:

private byte[] readFileContent(NodeRef nodeRef) throws IOException {
    ContentReader reader = contentService.getReader(nodeRef, ContentModel.PROP_CONTENT);

    if(reader == null)
        return null;

    InputStream originalInputStream = reader.getContentInputStream();
    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();

    final int BUF_SIZE = 1 << 8; // 1KiB buffer
    byte[] buffer = new byte[BUF_SIZE];
    int bytesRead = -1;

    while ((bytesRead = originalInputStream.read(buffer)) > -1) {
        outputStream.write(buffer, 0, bytesRead);
    }

    originalInputStream.close();

    return outputStream.toByteArray();
}

Answer 1

Ok, solved with simplier saving like this:

ContentWriter writer = contentService.getWriter(nodeRef, ContentModel.PROP_CONTENT, true);
InputStream contentStream = new ByteArrayInputStream(content.getBytes(encoding));

writer.setMimetype(mimeType);
writer.setEncoding(encoding);
writer.putContent(contentStream);

contentStream.close();

Previous saving was at place because of some content encoding problems, so testing shows if this works.