On Mon, 2015-11-09 at 17:12 +0530, Sanny wrote: > Hi, > > Using Proton C library. > > I am following the demo example "send.c" shared in the archive. > Currently > using the mqx OS. > > > 1. I have following function in *pn_error_code*(messenger->error); > always > returning *-2*. while calling the following function* > pn_messenger_put*(messenger, > message); > 2. In the following demo "send.c" when will the socket be open. As I > see > following function "*pn_messenger_start*(messenger);" doesnt have any > significance , since > if (*messenger->flags | PN_FLAGS_CHECK_ROUTES*) *messenger->flags is > never **PN_FLAGS_CHECK_ROUTES.* > > 3. Is there any basic code flow document that i can refer to start of > the > debug would be very helpful.
[oops, just discovered a new keyboard shortcut for "send" while typing this mail, will attempt to complete it now] You may want to consider the event-driven approach which is becoming more popular than messenger. Messenger has some limitations (particularly around error handling/reporting) and right now it appears like more development is going into the more flexible event-driven approach. The C doc for the event approach is not good but there are 2 C examples `proton/tests/tools/apps/c/reactor-*.c`. The C++ and python bindings have pretty good tutorials and examples and are very close analogues to the C API so you can also work backwards from them. On your original question: pn_error_text() may give you more of a clue about your error, -2 is PN_ERR which only really tells you that proton doesn't have a specific error code for whatever is going wrong. The line "if (*messenger->flags | PN_FLAGS_CHECK_ROUTES*)" means that the checks are *always* run if *any* of messenger->flags are set so that code might be an issue in your problem. (I believe the line is a proton bug, https://issues.apache.org/jira/browse/PROTON-1043) > > > Thanks in Advance > > On Thu, Oct 29, 2015 at 7:21 PM, Sanny <sanddune...@gmail.com> wrote: > > > Hi, > > > > Using Proton C library. > > > > I am following the demo example "send.c" shared in the archive. > > Currently > > using the mqx OS. > > > > > > 1. I have following function in *pn_error_code*(messenger->error); > > always > > returning *-2*. while calling the following function* > > pn_messenger_put*(messenger, > > message); > > 2. In the following demo "send.c" when will the socket be open. As > > I see > > following function "*pn_messenger_start*(messenger);" doesnt have > > any > > significance , since > > if (*messenger->flags | PN_FLAGS_CHECK_ROUTES*) *messenger->flags > > is > > never **PN_FLAGS_CHECK_ROUTES.* > > > > 3. Is there any basic code flow document that i can refer to start > > of the > > debug would be very helpful. > > > > > > Thanks in Advance
