Annotation of parser3/src/main/pa_stylesheet_manager.C, revision 1.19
1.1 parser 1: /** @file
2: Parser: sql driver manager implementation.
3:
1.17 paf 4: Copyright (c) 2001-2003 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:
1.19 ! paf 10: static const char* IDENT_STYLESHEET_MANAGER_C="$Date: 2003/09/25 09:15:03 $";
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:
1.17 paf 22: Stylesheet_manager stylesheet_manager;
1.1 parser 23:
24: // consts
25:
1.17 paf 26: const time_t SECOND=1;
27: const time_t EXPIRE_UNUSED_CONNECTION_SECONDS=5*60;
28: const time_t CHECK_EXPIRED_CONNECTION_SECONDS=EXPIRE_UNUSED_CONNECTION_SECONDS*2;
1.1 parser 29:
30: // helpers
31:
1.17 paf 32: static void expire_connection(Stylesheet_connection& connection, time_t older_dies) {
1.1 parser 33: if(connection.connected() && connection.expired(older_dies))
34: connection.disconnect();
35: }
1.17 paf 36: static void expire_connections(
37: Stylesheet_manager::connection_cache_type::key_type /*key*/,
38: Stylesheet_manager::connection_cache_type::value_type stack,
39: time_t older_dies) {
1.19 ! paf 40: for(size_t i=0; i<stack->top_index(); i++)
1.17 paf 41: expire_connection(*stack->get(i), older_dies);
1.1 parser 42: }
43:
1.17 paf 44: // Stylesheet_connection methods
1.1 parser 45:
1.17 paf 46: void Stylesheet_connection::close() {
47: stylesheet_manager.close_connection(ffile_spec, *this);
1.1 parser 48: }
49:
1.17 paf 50: // Stylesheet_manager methods
1.1 parser 51:
1.17 paf 52: Stylesheet_manager::Stylesheet_manager(): prev_expiration_pass_time(0) {
1.1 parser 53:
1.18 paf 54: cache_managers.put(String::Body("stylesheet"), this);
1.17 paf 55: }
56:
57: Stylesheet_manager::~Stylesheet_manager() {
58: connection_cache.for_each(expire_connections, time(0)+SECOND/*=in future=expire all*/);
59: }
60:
61: Stylesheet_connection_ptr Stylesheet_manager::get_connection(const String& file_spec) {
62: Stylesheet_connection* result=get_connection_from_cache(file_spec);
63: if(!result)
64: result=new Stylesheet_connection(file_spec);
65: return Stylesheet_connection_ptr(result);
1.1 parser 66: }
67:
68: void Stylesheet_manager::close_connection(const String& file_spec,
69: Stylesheet_connection& connection) {
70: put_connection_to_cache(file_spec, connection);
71: }
72:
73: // stylesheet cache
74: /// @todo get rid of memory spending Stack [zeros deep inside got accumulated]
1.17 paf 75: Stylesheet_connection* Stylesheet_manager::get_connection_from_cache(const String& file_spec) {
1.1 parser 76: SYNCHRONIZED;
77:
1.17 paf 78: if(connection_cache_type::value_type connections=connection_cache.get(file_spec))
79: while(!connections->is_empty()) { // there are cached stylesheets to that 'file_spec'
80: Stylesheet_connection* result=connections->pop();
1.1 parser 81: if(result->connected()) // not expired?
82: return result;
83: }
84:
85: return 0;
86: }
87:
88: void Stylesheet_manager::put_connection_to_cache(const String& file_spec,
1.17 paf 89: Stylesheet_connection& connection) {
1.1 parser 90: SYNCHRONIZED;
91:
1.17 paf 92: connection_cache_type::value_type connections=connection_cache.get(file_spec);
1.1 parser 93: if(!connections) { // there are no cached stylesheets to that 'file_spec' yet?
1.17 paf 94: connections=new connection_cache_value_type;
1.1 parser 95: connection_cache.put(file_spec, connections);
96: }
97: connections->push(&connection);
98: }
99:
1.5 paf 100: void Stylesheet_manager::maybe_expire_cache() {
1.1 parser 101: time_t now=time(0);
102:
103: if(prev_expiration_pass_time<now-CHECK_EXPIRED_CONNECTION_SECONDS) {
1.17 paf 104: connection_cache.for_each(expire_connections, now-EXPIRE_UNUSED_CONNECTION_SECONDS);
1.1 parser 105:
106: prev_expiration_pass_time=now;
107: }
108: }
1.17 paf 109: /*
1.3 paf 110: static void add_connection_to_status_cache_table(Array::Item *value, void *info) {
111: Stylesheet_connection& connection=*static_cast<Stylesheet_connection *>(value);
112: Table& table=*static_cast<Table *>(info);
113:
114: if(connection.connected()) {
1.17 paf 115: =table.pool();
116: Array& row=*new Array();
1.3 paf 117:
1.4 paf 118: // file
1.3 paf 119: row+=&connection.file_spec();
1.4 paf 120: // time
1.3 paf 121: time_t time_stamp=connection.get_time_used();
1.17 paf 122: row+=new String(pool.copy(ctime(&time_stamp)));
1.3 paf 123:
124: table+=&row;
125: }
126: }
127: static void add_connections_to_status_cache_table(const Hash::Key& key, Hash::Val *value, void *info) {
128: Stack& stack=*static_cast<Stack *>(value);
129: Array_iter iter(stack);
130: for(int countdown=stack.top_index(); countdown-->=0; )
131: add_connection_to_status_cache_table(iter.next(), info);
132: }
1.17 paf 133: */
134: Value* Stylesheet_manager::get_status() {
135: VHash* result=new VHash;
136: /*
1.2 paf 137: // cache
138: {
1.17 paf 139: Array& columns=*new Array();
140: columns+=new String("file");
141: columns+=new String("time");
142: Table& table=*new Table(0, &columns, connection_cache.length());
1.2 paf 143:
144: connection_cache.for_each(add_connections_to_status_cache_table, &table);
145:
1.17 paf 146: result.hash(source).put(*new String("cache"), new VTable(&table));
1.2 paf 147: }
1.17 paf 148: */
1.2 paf 149: return result;
150: }
151:
1.1 parser 152: #endif
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