<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">Hi all,</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">I ran into a small bug in pamqp where it tries to determine the best data type for an AMQP field table when packing data. I found that when I allow it to use a short int value, RabbitMQ can not properly decode it. I just went back and looked at the AMQP errata for field types at <a href="http://www.rabbitmq.com/amqp-0-9-1-errata.html#section_3">http://www.rabbitmq.com/amqp-0-9-1-errata.html#section_3</a>. Seems my mistake was using the AMQP-0-9-1 standard for field types with regard to short integers.</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">According to that table for 0-9-1, <i>U</i> should indicate a signed 16-bit integer value and <i>s</i> should indicate a short string. These are the values I used, however RabbitMQ chokes on the <i>U</i>.</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">In looking at the code for the encoder and decoder in Rabbit, I see that <i>s</i> is used for short ints.</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><a href="https://github.com/rabbitmq/rabbitmq-server/blob/master/src/rabbit_binary_generator.erl#L133">https://github.com/rabbitmq/rabbitmq-server/blob/master/src/rabbit_binary_generator.erl#L133</a></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><a href="https://github.com/rabbitmq/rabbitmq-server/blob/master/src/rabbit_binary_parser.erl#L78">https://github.com/rabbitmq/rabbitmq-server/blob/master/src/rabbit_binary_parser.erl#L78</a></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">And that the AMQP-0-9-1 specified <i>U</i> is not supported at all. Additionally, the 0-9-1 <i>s</i> is only used for short ints. This is mentioned in the remarks.</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">Will RabbitMQ be staying with the misuse of <i>s</i> for shorts for the foreseeable future? Is there any intention or desire to add the specified <i>U</i> into the decoder and never support <i>s</i> for anything but short-int instead of short-string?</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">Regards,</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">Gavin</div><div id="bloop_sign_1389919133155708928" class="bloop_sign"></div></body></html>