Class: Jlog::Writer

Inherits:
Jlog
  • Object
show all
Defined in:
ext/jlog/jlog.c

Constant Summary

Constants inherited from Jlog

VERSION

Instance Method Summary collapse

Methods inherited from Jlog

#add_subscriber, #close, #destroy, #inspect, #list_subscribers, #raw_size, #remove_subscriber

Constructor Details

#initialize(*args) ⇒ Object 



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# File 'ext/jlog/jlog.c', line 58

VALUE rJlog_initialize(int argc, VALUE* argv, VALUE klass) 
{
   int options;
   Jlog jo;
   jlog_id zeroed = {0,0};
   VALUE path;
   VALUE optarg;
   VALUE size;

   rb_scan_args(argc, argv, "12", &path, &optarg, &size);

   if(NIL_P(optarg)) {
      options = O_CREAT;
   } else {
      options = (int)NUM2INT(optarg);
   }

   if(NIL_P(size)) {
      size = (size_t)INT2FIX(0);
   }

   Data_Get_Struct(klass, jlog_obj, jo);

   jo->ctx = jlog_new(StringValuePtr(path));
   jo->path = strdup(StringValuePtr(path));
   jo->auto_checkpoint = 0;
   jo->start = zeroed;
   jo->prev = zeroed;
   jo->last = zeroed;
   jo->end = zeroed;


   if(!jo->ctx) {
      rJlog_free(jo);
      rb_raise(eJlog, "jlog_new(%s) failed", StringValuePtr(path));
   }

   if(options & O_CREAT) {
      if(jlog_ctx_init(jo->ctx) != 0) {
         if(jlog_ctx_err(jo->ctx) == JLOG_ERR_CREATE_EXISTS) {
            if(options & O_EXCL) {
               rJlog_free(jo);
               rb_raise(eJlog, "file already exists: %s", StringValuePtr(path));
            }
         }else {
            rJlog_raise(jo, "Error initializing jlog");
         }
      }
      jlog_ctx_close(jo->ctx);
      jo->ctx = jlog_new(StringValuePtr(path));
      if(!jo->ctx) {
         rJlog_free(jo);
         rb_raise(eJlog, "jlog_new(%s) failed after successful init", StringValuePtr(path));
      }
      rJlog_populate_subscribers(klass);
   } 

   if(!jo) { 
      rb_raise(eJlog, "jo wasn't initialized.");
   }

   return klass;
}

Instance Method Details

#open ⇒ Object 



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# File 'ext/jlog/jlog.c', line 267

VALUE rJlog_W_open(VALUE self)
{
   Jlog_Writer jo;

   Data_Get_Struct(self, jlog_obj, jo);

   if(!jo || !jo->ctx) {
      rb_raise(eJlog, "Invalid jlog context");
   }

   if(jlog_ctx_open_writer(jo->ctx) != 0) {
      rJlog_raise(jo, "jlog_ctx_open_writer failed");
   }

   return Qtrue;
}

#write(msg) ⇒ Object 



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# File 'ext/jlog/jlog.c', line 284

VALUE rJlog_W_write(VALUE self, VALUE msg)
{
   int err;
   Jlog_Writer jo;

   Data_Get_Struct(self, jlog_obj, jo);

   if(!jo || !jo->ctx) {
      rb_raise(eJlog, "Invalid jlog context");
   }

#if !defined(RSTRING_LEN)
#  define RSTRING_LEN(x) (RSTRING(x)->len)
#endif
   err = jlog_ctx_write(jo->ctx, StringValuePtr(msg), (size_t) RSTRING_LEN(msg));
   if(err != 0) {
      return Qfalse;
   } else {
      return Qtrue;
   }
}