Examples with SerializerPool org.exist.util.serializer.SerializerPool used on opensource projects

Example 1 with SerializerPool

use of org.exist.util.serializer.SerializerPool in project exist by eXist-db.

the class Stream method eval.

@Override
public Sequence eval(final Sequence[] args, @Nonnull final ResponseWrapper response) throws XPathException {
    if (args[0].isEmpty()) {
        return Sequence.EMPTY_SEQUENCE;
    }
    final Sequence inputNode = args[0];
    final Properties serializeOptions = new Properties();
    final String serOpts = args[1].getStringValue();
    final String[] contents = Option.tokenize(serOpts);
    for (String content : contents) {
        final String[] pair = Option.parseKeyValuePair(content);
        if (pair == null) {
            throw new XPathException(this, "Found invalid serialization option: " + content);
        }
        if (LOG.isDebugEnabled()) {
            logger.debug("Setting serialization property: {} = {}", pair[0], pair[1]);
        }
        serializeOptions.setProperty(pair[0], pair[1]);
    }
    if (!"org.exist.http.servlets.HttpResponseWrapper".equals(response.getClass().getName())) {
        throw new XPathException(this, ErrorCodes.XPDY0002, signature.toString() + " can only be used within the EXistServlet or XQueryServlet");
    }
    final String mediaType = serializeOptions.getProperty("media-type", "application/xml");
    final String encoding = serializeOptions.getProperty("encoding", "UTF-8");
    if (mediaType != null) {
        response.setContentType(mediaType + "; charset=" + encoding);
    }
    try {
        final BrokerPool db = BrokerPool.getInstance();
        try (final DBBroker broker = db.getBroker();
            final PrintWriter output = new PrintWriter(new OutputStreamWriter(response.getOutputStream(), encoding))) {
            final Serializer serializer = broker.borrowSerializer();
            final SerializerPool serializerPool = SerializerPool.getInstance();
            final SAXSerializer sax = (SAXSerializer) serializerPool.borrowObject(SAXSerializer.class);
            try {
                sax.setOutput(output, serializeOptions);
                serializer.setProperties(serializeOptions);
                serializer.setSAXHandlers(sax, sax);
                serializer.toSAX(inputNode, 1, inputNode.getItemCount(), false, false, 0, 0);
            } catch (final SAXException e) {
                e.printStackTrace();
                throw new IOException(e);
            } finally {
                serializerPool.returnObject(sax);
                broker.returnSerializer(serializer);
            }
            output.flush();
        }
        // commit the response
        response.flushBuffer();
    } catch (final IOException e) {
        throw new XPathException(this, "IO exception while streaming node: " + e.getMessage(), e);
    } catch (final EXistException e) {
        throw new XPathException(this, "Exception while streaming node: " + e.getMessage(), e);
    }
    return Sequence.EMPTY_SEQUENCE;
}