Annotation of parser3/src/types/pa_vmemcached.C, revision 1.3
1.1 moko 1: /** @file
2: Parser: memcached class.
3:
4: Copyright (c) 2001-2012 Art. Lebedev Studio (http://www.artlebedev.com)
5: Authors:
6: Ivan Poluyanov <ivan-poluyanov@yandex.ru>
7: Artem Stepanov <timofei1394@thesecure.in>
8: */
9:
10: #include "pa_vmemcached.h"
11: #include "pa_value.h"
12: #include "pa_vstring.h"
1.2 moko 13: #include "pa_vhash.h"
1.1 moko 14: #include "pa_vvoid.h"
15:
1.3 ! moko 16: volatile const char * IDENT_PA_VMEMCACHED_C="$Id: pa_vmemcached.C,v 1.2 2012-03-23 22:33:23 moko Exp $" IDENT_PA_VMEMCACHED_H;
1.1 moko 17:
18: #ifdef WIN32
19: const char *memcached_library="libmemcached.dll";
20: #else
21: const char *memcached_library="libmemcached.so";
22: #endif
23:
24: void error(const char *step, memcached_st* m, memcached_return rc) {
25: const char* str=f_memcached_strerror(m, rc);
26: throw Exception("memcached", 0, "%s error: %s (%d)", step, str ? str : "<unknown>", rc);
27: }
28:
1.2 moko 29: inline void check(const char *action, memcached_st* m, memcached_return rc) {
1.1 moko 30: if(rc==MEMCACHED_SUCCESS)
31: return;
1.2 moko 32: error(action, m, rc);
1.1 moko 33: }
34:
1.2 moko 35: void VMemcached::open(const String& connect_string, time_t attl){
1.1 moko 36: const char *library = memcached_library;
37: const char *memcached_status = memcached_load(library);
38:
39: if(memcached_status)
40: throw Exception("memcached", 0, "failed to load memcached library %s: %s", library, memcached_status);
41:
42: if(connect_string.is_empty())
43: throw Exception("memcached", 0, "server name must not be empty");
44:
1.2 moko 45: fttl=attl;
1.1 moko 46:
47: fm=f_memcached_create(NULL);
48:
49: memcached_server_st* fservers = f_memcached_servers_parse(connect_string.cstr());
50: check("server_push", fm, f_memcached_server_push(fm, fservers));
51: }
52:
1.2 moko 53: void VMemcached::flush(time_t attl){
54: check("flush", fm, f_memcached_flush(fm, attl));
55: }
56:
1.1 moko 57: void VMemcached::remove(const String& aname){
58: if(aname.is_empty())
59: throw Exception("memcached", 0, "key must not be empty");
60: const char* key_cstr=aname.cstr();
61:
62: memcached_return rc=f_memcached_delete(fm, key_cstr, strlen(key_cstr), (time_t)0);
63: if(rc != MEMCACHED_SUCCESS && rc != MEMCACHED_NOTFOUND)
64: error("delete", fm, rc);
65: }
66:
67: Value* VMemcached::get_element(const String& aname) {
68: if(Value *result=VStateless_object::get_element(aname))
69: return result;
70:
1.2 moko 71: if(aname.is_empty())
72: throw Exception("memcached", 0, "key must not be empty");
1.1 moko 73:
74: size_t length;
1.2 moko 75: uint32_t flags;
1.1 moko 76: memcached_return rc;
1.2 moko 77: const char* val=f_memcached_get(fm, aname.cstr(), aname.length(), &length, &flags, &rc);
1.1 moko 78:
79: if(rc==MEMCACHED_SUCCESS)
1.2 moko 80: // we can't use length from memcached as there can be '\0' inside
81: return new VString(*new String(val, String::L_TAINTED));
82: if(rc==MEMCACHED_NOTFOUND)
1.1 moko 83: return new VVoid();
84:
85: error("get", fm, rc);
86: return 0; // calm down compiler
87: }
88:
1.2 moko 89: Value &VMemcached::mget(ArrayString& akeys) {
90: VHash &hresult = *new VHash();
91:
92: size_t kl = akeys.count();
93:
94: if(kl==0)
95: return hresult;
96:
97: const char **keys = new const char *[kl];
1.3 ! moko 98: size_t *key_lengths = new size_t[kl];
1.2 moko 99:
100: for(int i=0; i<kl; i++){
101: const String *skey = akeys[i];
102: if(skey->is_empty())
103: throw Exception("memcached", 0, "key must not be empty");
104: keys[i] = skey->cstr();
1.3 ! moko 105: key_lengths[i] = skey->length();
1.2 moko 106: }
107:
1.3 ! moko 108: check("mget", fm, f_memcached_mget(fm, keys, key_lengths, kl));
1.2 moko 109:
110: memcached_result_st *results=f_memcached_result_create(fm, 0);
111:
112: for(;;){
113: memcached_return rc;
114: memcached_result_st *res = f_memcached_fetch_result(fm, results, &rc);
115: if (rc == MEMCACHED_SUCCESS){
1.3 ! moko 116: const char *hkey = pa_strdup(f_memcached_result_key_value(res));
! 117: const char *hvalue = pa_strdup(f_memcached_result_value(res));
! 118: // we can't use length from memcached for String there can be '\0' inside
! 119: hresult.hash().put(hkey, new VString(*new String(hvalue, String::L_TAINTED)));
1.2 moko 120: } else {
1.3 ! moko 121: if (rc == MEMCACHED_END || rc == MEMCACHED_NOTFOUND)
! 122: break;
! 123: error("mget", fm, rc);
1.2 moko 124: }
125: }
126:
1.3 ! moko 127: delete keys;
! 128: delete key_lengths;
! 129:
1.2 moko 130: // f_memcached_result_free(results);
131:
132: return hresult;
133: }
1.1 moko 134:
135: const VJunction* VMemcached::put_element(const String& aname, Value* avalue, bool /*replace*/){
136: if(aname.is_empty())
137: throw Exception("memcached", 0, "key must not be empty");
138:
1.2 moko 139: time_t ttl=fttl;
140: Value* lvalue;
1.1 moko 141:
142: if(HashStringValue* hash=avalue->get_hash()) {
143: if(Value* ttl_value=hash->get(expires_name))
144: ttl=ttl_value->as_int();
145: if(lvalue=hash->get(value_name)){
146: if(lvalue->get_junction())
147: throw Exception("memcached", 0, VALUE_NAME " must not be code");
148: } else
1.2 moko 149: throw Exception("memcached", &aname, "value hash must contain ." VALUE_NAME);
1.1 moko 150: } else {
151: lvalue=avalue;
152: }
153:
154: const char* key=aname.cstr();
1.2 moko 155: size_t key_length=aname.length();
1.1 moko 156:
1.2 moko 157: if(key_length > MEMCACHED_MAX_KEY)
158: throw Exception("memcached", &aname, "key length %d exceeds limit (%d bytes)", key_length, MEMCACHED_MAX_KEY);
1.1 moko 159:
1.2 moko 160: const String &value=avalue->as_string();
1.1 moko 161:
162: check("set", fm, f_memcached_set(
163: fm,
164: key,
1.2 moko 165: key_length,
166: value.cstr(),
167: value.length(),
1.1 moko 168: ttl,
1.2 moko 169: 0));
1.1 moko 170:
171: return PUT_ELEMENT_REPLACED_ELEMENT;
172: }
173:
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