Annotation of parser3/src/main/pa_stylesheet_manager.C, revision 1.28
1.1 parser 1: /** @file
2: Parser: sql driver manager implementation.
3:
1.27 paf 4: Copyright (c) 2001-2005 ArtLebedev Group (http://www.artlebedev.com)
1.13 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1 parser 6: */
7: #include "pa_config_includes.h"
8: #ifdef XML
1.14 paf 9:
1.28 ! paf 10: static const char * const IDENT_STYLESHEET_MANAGER_C="$Date: 2006/04/09 12:25:04 $";
1.1 parser 11:
12: #include "pa_stylesheet_manager.h"
13: #include "pa_exception.h"
14: #include "pa_common.h"
15: #include "pa_threads.h"
16: #include "pa_stack.h"
1.2 paf 17: #include "pa_vhash.h"
1.3 paf 18: #include "pa_vtable.h"
1.1 parser 19:
20: // globals
21:
1.23 paf 22: Stylesheet_manager* stylesheet_manager=0;
1.1 parser 23:
24: // consts
25:
1.17 paf 26: const time_t EXPIRE_UNUSED_CONNECTION_SECONDS=5*60;
27: const time_t CHECK_EXPIRED_CONNECTION_SECONDS=EXPIRE_UNUSED_CONNECTION_SECONDS*2;
1.1 parser 28:
29: // helpers
30:
1.17 paf 31: static void expire_connection(Stylesheet_connection& connection, time_t older_dies) {
1.1 parser 32: if(connection.connected() && connection.expired(older_dies))
33: connection.disconnect();
34: }
1.17 paf 35: static void expire_connections(
36: Stylesheet_manager::connection_cache_type::key_type /*key*/,
37: Stylesheet_manager::connection_cache_type::value_type stack,
38: time_t older_dies) {
1.19 paf 39: for(size_t i=0; i<stack->top_index(); i++)
1.17 paf 40: expire_connection(*stack->get(i), older_dies);
1.1 parser 41: }
42:
1.17 paf 43: // Stylesheet_connection methods
1.1 parser 44:
1.17 paf 45: void Stylesheet_connection::close() {
1.24 paf 46: stylesheet_manager->close_connection(ffile_spec, *this);
1.1 parser 47: }
48:
1.17 paf 49: // Stylesheet_manager methods
1.1 parser 50:
1.17 paf 51: Stylesheet_manager::Stylesheet_manager(): prev_expiration_pass_time(0) {
52: }
53:
54: Stylesheet_manager::~Stylesheet_manager() {
1.28 ! paf 55: connection_cache.for_each<time_t>(expire_connections, time(0)+(time_t)10/*=in future=expire all*/);
1.17 paf 56: }
57:
1.21 paf 58: Stylesheet_connection_ptr Stylesheet_manager::get_connection(String::Body file_spec) {
1.17 paf 59: Stylesheet_connection* result=get_connection_from_cache(file_spec);
60: if(!result)
61: result=new Stylesheet_connection(file_spec);
62: return Stylesheet_connection_ptr(result);
1.1 parser 63: }
64:
1.21 paf 65: void Stylesheet_manager::close_connection(String::Body file_spec, Stylesheet_connection& connection) {
1.1 parser 66: put_connection_to_cache(file_spec, connection);
67: }
68:
69: // stylesheet cache
70: /// @todo get rid of memory spending Stack [zeros deep inside got accumulated]
1.21 paf 71: Stylesheet_connection* Stylesheet_manager::get_connection_from_cache(String::Body file_spec) {
1.1 parser 72: SYNCHRONIZED;
73:
1.17 paf 74: if(connection_cache_type::value_type connections=connection_cache.get(file_spec))
75: while(!connections->is_empty()) { // there are cached stylesheets to that 'file_spec'
76: Stylesheet_connection* result=connections->pop();
1.1 parser 77: if(result->connected()) // not expired?
78: return result;
79: }
80:
81: return 0;
82: }
83:
1.21 paf 84: void Stylesheet_manager::put_connection_to_cache(String::Body file_spec,
1.17 paf 85: Stylesheet_connection& connection) {
1.1 parser 86: SYNCHRONIZED;
87:
1.17 paf 88: connection_cache_type::value_type connections=connection_cache.get(file_spec);
1.1 parser 89: if(!connections) { // there are no cached stylesheets to that 'file_spec' yet?
1.17 paf 90: connections=new connection_cache_value_type;
1.1 parser 91: connection_cache.put(file_spec, connections);
92: }
93: connections->push(&connection);
94: }
95:
1.5 paf 96: void Stylesheet_manager::maybe_expire_cache() {
1.1 parser 97: time_t now=time(0);
98:
99: if(prev_expiration_pass_time<now-CHECK_EXPIRED_CONNECTION_SECONDS) {
1.28 ! paf 100: connection_cache.for_each<time_t>(expire_connections, now-EXPIRE_UNUSED_CONNECTION_SECONDS);
1.1 parser 101:
102: prev_expiration_pass_time=now;
103: }
104: }
1.3 paf 105:
1.22 paf 106: static void add_connection_to_status_cache_table(Stylesheet_connection& connection, Table* table) {
1.3 paf 107: if(connection.connected()) {
1.22 paf 108: ArrayString& row=*new ArrayString;
1.3 paf 109:
1.4 paf 110: // file
1.22 paf 111: row+=new String(connection.file_spec(), String::L_AS_IS);
1.4 paf 112: // time
1.22 paf 113: time_t time_used=connection.get_time_used();
114: row+=new String(pa_strdup(ctime(&time_used)));
1.3 paf 115:
1.22 paf 116: *table+=&row;
1.3 paf 117: }
118: }
1.22 paf 119: static void add_connections_to_status_cache_table(
120: Stylesheet_manager::connection_cache_type::key_type /*key*/,
121: Stylesheet_manager::connection_cache_type::value_type stack, Table* table)
122: {
123: for(Array_iterator<Stylesheet_connection*> i(*stack); i.has_next(); )
124: add_connection_to_status_cache_table(*i.next(), table);
1.3 paf 125: }
1.22 paf 126:
1.17 paf 127: Value* Stylesheet_manager::get_status() {
128: VHash* result=new VHash;
1.2 paf 129: // cache
130: {
1.22 paf 131: ArrayString& columns=*new ArrayString;
1.17 paf 132: columns+=new String("file");
133: columns+=new String("time");
1.22 paf 134: Table& table=*new Table(&columns, connection_cache.count());
1.2 paf 135:
1.28 ! paf 136: connection_cache.for_each<Table*>(add_connections_to_status_cache_table, &table);
1.2 paf 137:
1.22 paf 138: result->get_hash()->put(*new String("cache"), new VTable(&table));
1.2 paf 139: }
140: return result;
141: }
142:
1.1 parser 143: #endif
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