http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/wvstreams/unifastregetgen.h

/* -*- Mode: C++ -*- * Worldvisions Weaver Software: * Copyright (C) 2002-2005 Net Integration Technologies, Inc. */ #ifndef __UNIFASTREGETGEN_H #define __UNIFASTREGETGEN_H #include "unifiltergen.h" class UniConfValueTree; /** * A lightwight but slightly dangerous variant of UniCacheGen. * * UniCacheGen tries to make all operations asynchronous, by storing a local * cache of absolutely everything in the entire UniConf subtree that it wraps. * UniFastRegetGen, on the other hand, tries to be helpful without actually * wasting too much memory, but leaves many operations still synchronous. * * This is useful for programs that may need to access a variety of different * UniConf keys, don't need to worry *too* much about blocking occasionally * while waiting for UniConf, but would like most get() operations to be * fast. * * UniFastRegetGen makes subsequent get() operations on a key, after the * first one, be guaranteed asynchronous. It caches keys which you've * previously done get() on, and accepts notifications for those keys * (so the value is always up to date, but you'll never have to wait for it * again). It makes no attempt to optimize any other operations, including * set(), refresh/commit, or iterate. It ignores notifications for any * keys you haven't explicitly done get() on in the past. */ class UniFastRegetGen : public UniFilterGen { public: UniFastRegetGen(IUniConfGen *_inner); virtual ~UniFastRegetGen(); /***** Overridden members *****/ virtual WvString get(const UniConfKey &key); virtual bool exists(const UniConfKey &key); virtual bool haschildren(const UniConfKey &key); private: IUniConfGen *inner; UniConfValueTree *tree; protected: virtual void gencallback(const UniConfKey &key, WvStringParm value); }; #endif // __UNIFASTREGETGEN_H