Annotation of parser3/src/types/pa_vmemcached.C, revision 1.6
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:
1.6 ! moko 16: volatile const char * IDENT_PA_VMEMCACHED_C="$Id: pa_vmemcached.C,v 1.5 2012-04-12 22:44:47 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:
1.6 ! moko 35: inline void check_key(const String& akey) {
! 36: if(akey.is_empty())
! 37: throw Exception("memcached", 0, "key must not be empty");
! 38: if(akey.length() > MEMCACHED_MAX_KEY)
! 39: throw Exception("memcached", &akey, "key length %d exceeds limit (%d bytes)", akey.length(), MEMCACHED_MAX_KEY);
! 40: }
! 41:
1.2 moko 42: void VMemcached::open(const String& connect_string, time_t attl){
1.1 moko 43: const char *library = memcached_library;
44: const char *memcached_status = memcached_load(library);
45:
46: if(memcached_status)
47: throw Exception("memcached", 0, "failed to load memcached library %s: %s", library, memcached_status);
48:
49: if(connect_string.is_empty())
50: throw Exception("memcached", 0, "server name must not be empty");
51:
1.2 moko 52: fttl=attl;
1.1 moko 53:
54: fm=f_memcached_create(NULL);
55:
56: memcached_server_st* fservers = f_memcached_servers_parse(connect_string.cstr());
57: check("server_push", fm, f_memcached_server_push(fm, fservers));
58: }
59:
1.6 ! moko 60: void VMemcached::flush(time_t attl) {
1.2 moko 61: check("flush", fm, f_memcached_flush(fm, attl));
62: }
63:
1.6 ! moko 64: void VMemcached::remove(const String& aname) {
! 65: check_key(aname);
! 66:
! 67: memcached_return rc=f_memcached_delete(fm, aname.cstr(), aname.length(), (time_t)0);
1.1 moko 68:
69: if(rc != MEMCACHED_SUCCESS && rc != MEMCACHED_NOTFOUND)
70: error("delete", fm, rc);
71: }
72:
73: Value* VMemcached::get_element(const String& aname) {
74: if(Value *result=VStateless_object::get_element(aname))
75: return result;
76:
1.6 ! moko 77: check_key(aname);
1.1 moko 78:
79: memcached_return rc;
1.5 moko 80: Serialization_data data;
81: data.ptr=f_memcached_get(fm, aname.cstr(), aname.length(), &data.length, &data.flags, &rc);
1.1 moko 82:
1.5 moko 83: if(rc==MEMCACHED_SUCCESS){
84: data.ptr=pa_strdup(data.ptr, data.length);
85: return &memcached_deserialize(data);
86: }
1.4 moko 87:
1.2 moko 88: if(rc==MEMCACHED_NOTFOUND)
1.1 moko 89: return new VVoid();
90:
91: error("get", fm, rc);
92: return 0; // calm down compiler
93: }
94:
1.2 moko 95: Value &VMemcached::mget(ArrayString& akeys) {
96: VHash &hresult = *new VHash();
97:
98: size_t kl = akeys.count();
99:
100: if(kl==0)
101: return hresult;
102:
103: const char **keys = new const char *[kl];
1.3 moko 104: size_t *key_lengths = new size_t[kl];
1.2 moko 105:
1.6 ! moko 106: for(size_t i=0; i<kl; i++){
! 107: const String &skey = *(akeys[i]);
! 108: check_key(skey);
! 109: keys[i] = skey.cstr();
! 110: key_lengths[i] = skey.length();
1.2 moko 111: }
112:
1.3 moko 113: check("mget", fm, f_memcached_mget(fm, keys, key_lengths, kl));
1.2 moko 114:
115: memcached_result_st *results=f_memcached_result_create(fm, 0);
116:
1.4 moko 117: memcached_return rc;
118:
119: while(f_memcached_fetch_result(fm, results, &rc) && (rc == MEMCACHED_SUCCESS)){
120: const char *hkey = pa_strdup(f_memcached_result_key_value(results), f_memcached_result_key_length(results));
1.5 moko 121:
122: Serialization_data value(f_memcached_result_flags(results));
123: value.length = f_memcached_result_length(results);
124: value.ptr = pa_strdup(f_memcached_result_value(results), value.length);
125:
126: hresult.hash().put(hkey, &memcached_deserialize(value));
1.2 moko 127: }
1.4 moko 128:
129: if (rc != MEMCACHED_END && rc != MEMCACHED_NOTFOUND)
130: error("mget", fm, rc);
1.2 moko 131:
1.3 moko 132: delete keys;
133: delete key_lengths;
134:
1.2 moko 135: // f_memcached_result_free(results);
136:
137: return hresult;
138: }
1.1 moko 139:
140: const VJunction* VMemcached::put_element(const String& aname, Value* avalue, bool /*replace*/){
1.6 ! moko 141: check_key(aname);
1.1 moko 142:
1.2 moko 143: time_t ttl=fttl;
144: Value* lvalue;
1.1 moko 145:
146: if(HashStringValue* hash=avalue->get_hash()) {
147: if(Value* ttl_value=hash->get(expires_name))
148: ttl=ttl_value->as_int();
149: if(lvalue=hash->get(value_name)){
150: if(lvalue->get_junction())
151: throw Exception("memcached", 0, VALUE_NAME " must not be code");
152: } else
1.2 moko 153: throw Exception("memcached", &aname, "value hash must contain ." VALUE_NAME);
1.1 moko 154: } else {
155: lvalue=avalue;
156: }
157:
1.5 moko 158: Serialization_data value;
159: avalue->serialize(value);
1.1 moko 160:
161: check("set", fm, f_memcached_set(
162: fm,
1.6 ! moko 163: aname.cstr(),
! 164: aname.length(),
1.5 moko 165: value.ptr,
166: value.length,
1.1 moko 167: ttl,
1.5 moko 168: value.flags));
1.1 moko 169:
170: return PUT_ELEMENT_REPLACED_ELEMENT;
171: }
172:
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