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

/* -*- Mode: C++ -*- * Worldvisions Weaver Software: * Copyright (C) 2002 Net Integration Technologies, Inc. * * A UniConf generator that caches keys/values in memory. */ #ifndef __UNIREPLICATEGEN_H #define __UNIREPLICATEGEN_H #include "uniconftree.h" #include "wvlog.h" /** * A UniConf generator that replicates generators between an ordered list * of inner generators, with the priority given by the list. * * Replication of the data occurs when the generator is contructed, whenever * prepend() or append() is called, or whenever any of the generators in the * list goes from !isok() to isok(). If two inner generators contain different * values for the same before replication, then they will both have the value * of the earlier generator (as ordered in the moniker) after replication. * * If an asynchronous change occurs in any of the inner generators, the * new value will be set in all generators irrespective of priority. */ class UniReplicateGen : public UniConfGen { private: struct Gen { IUniConfGen *gen; bool was_ok; bool auto_free; Gen(IUniConfGen *_gen, bool _auto_free) : gen(_gen), was_ok(gen->isok()), auto_free(_auto_free) {} ~Gen() { if (auto_free) WVRELEASE(gen); } bool isok() { return was_ok = gen->isok(); } }; DeclareWvList(Gen); GenList gens; bool processing_callback; Gen *first_ok() const; void replicate_if_any_have_become_ok(); protected: void replicate(const UniConfKey &key = "/"); void deltacallback(Gen *src_gen, const UniConfKey &key, WvStringParm value); public: UniReplicateGen(); UniReplicateGen(const IUniConfGenList &_gens, bool autofree = true); virtual ~UniReplicateGen(); void prepend(IUniConfGen *gen, bool autofree = true); void append(IUniConfGen *gen, bool autofree = true); /***** Overridden members *****/ virtual bool isok(); virtual void commit(); virtual bool refresh(); virtual void flush_buffers() { } virtual void set(const UniConfKey &key, WvStringParm value); virtual void setv(const UniConfPairList &pairs); virtual WvString get(const UniConfKey &key); virtual Iter *iterator(const UniConfKey &key); }; #endif // __UNIREPLICATEGEN_H