include/unislowgen.h

   1 /* -*- Mode: C++ -*-
   2  * Worldvisions Weaver Software:
   3  *   Copyright (C) 2002 Net Integration Technologies, Inc.
   4  *
   5  * A UniConfGen that makes everything slow.
   6  */
   7 #ifndef __UNISLOWGEN_H
   8 #define __UNISLOWGEN_H
   9
  10 #include "unifiltergen.h"
  11
  12 /**
  13  * A UniConfGen that counts all "potentially synchronous" (ie. slow)
  14  * operations, so you'll know for sure if you're calling UniConf synchronous
  15  * operations when you shouldn't be.  Hint: wrapping this one in a
  16  * UniCacheGen is supposed to cut slow operations to a bare minimum, so a
  17  * good test is to try a moniker like this:
  18  *
  19  *   cache:slow:tcp:localhost
  20  *
  21  * ...and see if everything still works but there are no slow operations.
  22  *
  23  * (A previous version of this used to actually make things slow by doing
  24  * a deliberate sleep() on synchronous operations, but that wasn't really
  25  * needed.  Now it just logs them instead.)
  26  */
  27 class UniSlowGen : public UniFilterGen
  28 {
  29 public:
  30     UniSlowGen(IUniConfGen *inner);
  31     virtual ~UniSlowGen();
  32
  33     virtual void commit();
  34     virtual bool refresh();
  35     virtual void flush_buffers() { }
  36     virtual WvString get(const UniConfKey &key);
  37     virtual bool exists(const UniConfKey &key);
  38     virtual bool haschildren(const UniConfKey &key);
  39     virtual Iter *iterator(const UniConfKey &key);
  40     virtual Iter *recursiveiterator(const UniConfKey &key);
  41
  42     int how_slow() const
  43         { return slowcount; }
  44
  45     void reset_slow()
  46         { slowcount = 0; }
  47
  48 private:
  49     int slowcount;
  50
  51     void be_slow(WvStringParm what);
  52     void be_slow(WVSTRING_FORMAT_DECL)
  53         { be_slow(WvString(WVSTRING_FORMAT_CALL)); }
  54 };
  55
  56 #endif //__UNISLOWGEN_H