--- parser3/src/include/pa_sql_connection.h	2001/08/24 07:04:52	1.12
+++ parser3/src/include/pa_sql_connection.h	2003/11/20 15:35:30	1.32
@@ -1,75 +1,176 @@
 /** @file
 	Parser: sql fconnection decl.
 
-	Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
-
-	Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
-
-	$Id: pa_sql_connection.h,v 1.12 2001/08/24 07:04:52 parser Exp $
+	Copyright (c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com)
+	Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
 */
 
 #ifndef PA_SQL_CONNECTION_H
 #define PA_SQL_CONNECTION_H
 
-#include "pa_config_includes.h"
-#include "pa_pool.h"
+static const char* IDENT_SQL_CONNECTION_H="$Date: 2003/11/20 15:35:30 $";
+
+
 #include "pa_sql_driver.h"
 #include "pa_sql_driver_manager.h"
 
-/// SQL fconnection. handy wrapper around low level SQL_Driver
-class SQL_Connection : public Pooled {
+// defines
 
+/// @see SQL_Driver_services_impl::_throw
+#ifdef PA_WITH_SJLJ_EXCEPTIONS
+	#define SQL_CONNECTION_SERVICED_FUNC_GUARDED(actions) actions
+#else
+	#define SQL_CONNECTION_SERVICED_FUNC_GUARDED(actions) \
+		if(!setjmp(fservices.mark)) { \
+			actions; \
+		} else \
+			fservices.propagate_exception();
+#endif
+
+/// SQL_Driver_services Pooled implementation
+class SQL_Driver_services_impl: public SQL_Driver_services {
+	const String* furl;
+	Exception fexception;
 public:
+	SQL_Driver_services_impl(): furl(0) {}
+	void set_url(const String& aurl) { furl=&aurl;}
+
+	override void *malloc(size_t size) { return pa_malloc(size); }
+	override void *malloc_atomic(size_t size) { return pa_malloc_atomic(size); }
+	override void *realloc(void *ptr, size_t size) { return pa_realloc(ptr, size); }
+
+	/**
+		normally we can't 'throw' from dynamic library, so
+		the idea is to #1 jump to C++ some function to main body, where
+		every function stack frame has exception unwind information
+		and from there... #2 propagate_exception()
+
+        but when parser configured --with-sjlj-exceptions
+		one can simply 'throw' from dynamic library.
+		[sad story: one can not longjump/throw due to some bug in gcc as of 3.2.1 version]
+	*/
+	override void _throw(const SQL_Error& aexception) { 
+		// converting SQL_exception to parser Exception
+		// hiding passwords and addresses from accidental show [imagine user forgot @exception]
+#ifdef PA_WITH_SJLJ_EXCEPTIONS
+		throw
+#else
+		fexception=
+#endif
+		Exception(aexception.type(), 
+				&url_without_login(),
+				aexception.comment()); 
+
+#ifndef PA_WITH_SJLJ_EXCEPTIONS
+		longjmp(mark, 1);
+#endif
+	}
+	virtual void propagate_exception() {
+#ifndef PA_WITH_SJLJ_EXCEPTIONS
+		throw fexception;
+#endif
+	}
+
+private:
+	const String& url_without_login() const;
+};
 
-	SQL_Connection(Pool& pool, const String& aurl, SQL_Driver& adriver) : Pooled(pool),
+/// SQL connection. handy wrapper around low level SQL_Driver
+class SQL_Connection: public PA_Object {
+	const String&  furl;
+	SQL_Driver& fdriver;
+	SQL_Driver_services_impl fservices;
+	void *fconnection;
+	time_t time_used;
+	bool marked_to_rollback;
+
+public:
+
+	SQL_Connection(const String& aurl, SQL_Driver& adriver):
 		furl(aurl),
 		fdriver(adriver),
 		fconnection(0),
-		time_stamp(0) {
+		time_used(0), 
+		marked_to_rollback(false) {
 	}
 	
-	const String& url() { return furl; }
+	const String& get_url() { return furl; }
 
-	void set_services(SQL_Driver_services *aservices) {
-		time_stamp=time(0); // they started to use at this time
-		fservices=aservices;
+	void set_url() {
+		fservices.set_url(furl);
 	}
-	bool expired(time_t older_dies) {
-		return time_stamp<older_dies;
+	void use() {
+		time_used=time(0); // they started to use at this time
 	}
-
-	void close() {
-		SQL_driver_manager->close_connection(furl, *this);
+	bool expired(time_t older_dies) {
+		return /*!freferences && */time_used<older_dies;
 	}
+	time_t get_time_used() { return time_used; }
 
 	bool connected() { return fconnection!=0; }
 	void connect(char *used_only_in_connect_url_cstr) { 
-		fdriver.connect(used_only_in_connect_url_cstr, *fservices, &fconnection);
-	}
-	void disconnect() { fdriver.disconnect(fconnection); fconnection=0; }
-	void commit() { fdriver.commit(*fservices, fconnection); }
-	void rollback() { fdriver.rollback(*fservices, fconnection); }
-	bool ping() { return fdriver.ping(*fservices, fconnection); }
-	uint quote(char *to, const char *from, unsigned int length) {
-		return fdriver.quote(*fservices, fconnection, to, from, length);
+		SQL_CONNECTION_SERVICED_FUNC_GUARDED(
+			fdriver.connect(used_only_in_connect_url_cstr, fservices, &fconnection)
+		);
+	}
+	void disconnect() { 
+		fdriver.disconnect(fconnection); fconnection=0; 
+	}
+	bool ping() { 
+		SQL_CONNECTION_SERVICED_FUNC_GUARDED(
+			return fdriver.ping(fservices, fconnection)
+		);
+	}
+	const char* quote(const char* str, unsigned int length) {
+		SQL_CONNECTION_SERVICED_FUNC_GUARDED(
+			return fdriver.quote(fservices, fconnection, str, length)
+		);
+//		return 0; // never reached
 	}
 
 	void query(
-		const char *statement, unsigned long offset, unsigned long limit,
-		SQL_Driver_query_event_handlers& handlers) { 
-		fdriver.query(*fservices, fconnection, 
-			statement, offset, limit, 
-			handlers);
+		const char* statement, unsigned long offset, unsigned long limit,
+		SQL_Driver_query_event_handlers& handlers, 
+		const String& source) {
+		try {
+			SQL_CONNECTION_SERVICED_FUNC_GUARDED(
+				fdriver.query(fservices, fconnection, 
+					statement, offset, limit, 
+					handlers)
+			);	
+		} catch(const Exception& e) { // query problem
+			if(strcmp(e.type(), "sql.connect")==0) { // if it is _throw exception, 
+				// give more specific source [were url]
+				throw Exception("sql.execute",
+					&source, 
+					"%s", e.comment());
+			} else
+				rethrow;
+		}
+	}
+
+	void commit() { 
+		SQL_CONNECTION_SERVICED_FUNC_GUARDED(
+			fdriver.commit(fservices, fconnection) 
+		);
+	}
+	void rollback() { 
+		SQL_CONNECTION_SERVICED_FUNC_GUARDED(
+			fdriver.rollback(fservices, fconnection)
+		);
 	}
 
+	/// return to cache
+	void close() {
+		if(marked_to_rollback) {
+			rollback();
+			marked_to_rollback=false;
+		} else
+			commit();
 
-private:
+		SQL_driver_manager.close_connection(furl, this);
+	}
 
-	const String& furl;
-	SQL_Driver& fdriver;
-	SQL_Driver_services *fservices;
-	void *fconnection;
-	time_t time_stamp;
 };
 
 #endif