That would work. Slightly inconvenient though.
On Fri, Feb 13, 2015 at 5:54 PM, Marek Potociar <marek.potociar_at_oracle.com>
wrote:
> Why don't you then just create your own output stream wrapper that
> overrides the flush() method to do nothing (and delegate other methods to
> the wrapped output stream) and then just create an OutputStreamWriter,
> serialize into it and invoke flush() on writer? That will make sure
> that StreamEncoder will flush the buffer into your stream, and your stream
> will ensure that flush() call does not get propagated. IOW:
>
> public class NonFlushingOutputStream extends FilterOutputStream {
> public NonFlushingOutputStream(OutputStream out) {
> super(out);
> }
> public void flush() throws IOException {
> // no flushing...
> }
> }
>
> ...
>
> public void writeTo(Object t, Class<?> type, Type genericType,
>
> Annotation[] annotations,
>
> MediaType mediaType,
>
> MultivaluedMap<String, Object> httpHeaders,
>
> OutputStream entityStream)
>
> throws java.io.IOException, javax.ws.rs.WebApplicationException {
>
>
> OutputStreamWriter writer = new OutputStreamWriter(new
> NonFlushingOutputStream(entityStream), "UTF-8");
>
>
> SuperCoolJsonLibrary.serializeObjectToWriter(t, writer); // ehm...
> really supercool??
>
> writer.flush(); // just flush the buffer of the internal StreamEncoder
> in the OutputStreamWriter
> }
>
>
> Marek
>
>
> On 28 Jan 2015, at 18:54, Mikael Ståldal <
> mikael.staldal_at_appearnetworks.com> wrote:
>
> Yes, but how can I accomplish that when I need to wrap the OutputStream
> with a Writer?
>
> On Wed, Jan 28, 2015 at 6:41 PM, Marek Potociar <marek.potociar_at_oracle.com
> > wrote:
> IMO, you should not be flushing anything and just let the framework flush
> the content for you once it is done processing the outbound message…
>
> Marek
>
> On 23 Jan 2015, at 17:07, Mikael Ståldal <
> mikael.staldal_at_appearnetworks.com> wrote:
>
> I have a javax.ws.rs.ext.MessageBodyWriter like this:
>
> @Provider
> @Produces({MediaType.APPLICATION_JSON})
> public class JsonMessageBodyWriter extends MessageBodyWriter<Object> {
>
> @Override
> public boolean isWriteable(Class<?> type, Type genericType, Annotation[]
> annotations, MediaType mediaType) {
> return true;
> }
>
> @Override
> public long getSize(Object t, Class<?> type, Type genericType,
> Annotation[] annotations, mediaType) {
> return -1;
> }
>
> public void writeTo(Object t, Class<?> type, Type genericType,
> Annotation[] annotations,
> MediaType mediaType,
> MultivaluedMap<String, Object> httpHeaders,
> OutputStream entityStream)
> throws java.io.IOException,
> javax.ws.rs.WebApplicationException {
>
> OutputStreamWriter writer = new OutputStreamWriter(entityStream,
> "UTF-8");
>
> // this will not flush() nor close() writer
> SuperCoolJsonLibrary.serializeObjectToWriter(t, writer);
>
> writer.flush(); // problem here
> }
>
> }
>
> I think I need to do something at the end of MessageBodyWriter.writeTo(),
> otherwise there may be some data left buffered inside the
> OutputStreamWriter. But OutputStreamWriter.flush() will flush the
> entityStream I get from Jersey runtime a well, and that seems to cause this
> problem for me:
>
>
> http://w3facility.org/question/java-is-flush-needed-before-close-of-a-printwriter-buffer-stream/
>
> How should this be done? OutputStreamWriter have a flushBuffer() method
> which seems to do what I need, but it is not public :-(
>
> I use Linux, Oracle JDK 1.8.0_20, jetty-9.0.3.v20130506, Jersey 2.15.
>
> --
> Mikael Ståldal
> Chief Software Architect
> Appear
> Phone: +46 8 545 91 572
> Email: mikael.staldal_at_appearnetworks.com
>
>
>
>
>
> --
> Mikael Ståldal
> Chief Software Architect
> Appear
> Phone: +46 8 545 91 572
> Email: mikael.staldal_at_appearnetworks.com
>
>
>
--
Mikael Ståldal
Chief Software Architect
*Appear*
Phone: +46 8 545 91 572
Email: mikael.staldal_at_appearnetworks.com