I know that the SuperCoolJsonLibrary does not buffer anything by its own.
On Fri, Jan 23, 2015 at 5:23 PM, Eugen Cepoi <cepoi.eugen_at_gmail.com> wrote:
> Note that the lib you are using might also buffer some stuff and wrap your
> Writer.
> You maybe need to flush this "wrapper" (that will then flush his output to
> the writer) instead of flushing the writer.
>
> 2015-01-23 17:07 GMT+01:00 Mikael Ståldal <
> mikael.staldal_at_appearnetworks.com>:
>
>> 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