1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
|
#include "redismodule.h"
#include <string.h>
#include <assert.h>
/* Module configuration, save aux or not? */
long long conf_aux_count = 0;
/* Registered type */
RedisModuleType *testrdb_type = NULL;
/* Global values to store and persist to aux */
RedisModuleString *before_str = NULL;
RedisModuleString *after_str = NULL;
/* Global values used to keep aux from db being loaded (in case of async_loading) */
RedisModuleString *before_str_temp = NULL;
RedisModuleString *after_str_temp = NULL;
/* Indicates whether there is an async replication in progress.
* We control this value from RedisModuleEvent_ReplAsyncLoad events. */
int async_loading = 0;
void replAsyncLoadCallback(RedisModuleCtx *ctx, RedisModuleEvent e, uint64_t sub, void *data)
{
REDISMODULE_NOT_USED(e);
REDISMODULE_NOT_USED(data);
switch (sub) {
case REDISMODULE_SUBEVENT_REPL_ASYNC_LOAD_STARTED:
assert(async_loading == 0);
async_loading = 1;
break;
case REDISMODULE_SUBEVENT_REPL_ASYNC_LOAD_ABORTED:
/* Discard temp aux */
if (before_str_temp)
RedisModule_FreeString(ctx, before_str_temp);
if (after_str_temp)
RedisModule_FreeString(ctx, after_str_temp);
before_str_temp = NULL;
after_str_temp = NULL;
async_loading = 0;
break;
case REDISMODULE_SUBEVENT_REPL_ASYNC_LOAD_COMPLETED:
if (before_str)
RedisModule_FreeString(ctx, before_str);
if (after_str)
RedisModule_FreeString(ctx, after_str);
before_str = before_str_temp;
after_str = after_str_temp;
before_str_temp = NULL;
after_str_temp = NULL;
async_loading = 0;
break;
default:
assert(0);
}
}
void *testrdb_type_load(RedisModuleIO *rdb, int encver) {
int count = RedisModule_LoadSigned(rdb);
RedisModuleString *str = RedisModule_LoadString(rdb);
float f = RedisModule_LoadFloat(rdb);
long double ld = RedisModule_LoadLongDouble(rdb);
if (RedisModule_IsIOError(rdb)) {
RedisModuleCtx *ctx = RedisModule_GetContextFromIO(rdb);
if (str)
RedisModule_FreeString(ctx, str);
return NULL;
}
/* Using the values only after checking for io errors. */
assert(count==1);
assert(encver==1);
assert(f==1.5f);
assert(ld==0.333333333333333333L);
return str;
}
void testrdb_type_save(RedisModuleIO *rdb, void *value) {
RedisModuleString *str = (RedisModuleString*)value;
RedisModule_SaveSigned(rdb, 1);
RedisModule_SaveString(rdb, str);
RedisModule_SaveFloat(rdb, 1.5);
RedisModule_SaveLongDouble(rdb, 0.333333333333333333L);
}
void testrdb_aux_save(RedisModuleIO *rdb, int when) {
if (conf_aux_count==1) assert(when == REDISMODULE_AUX_AFTER_RDB);
if (conf_aux_count==0) assert(0);
if (when == REDISMODULE_AUX_BEFORE_RDB) {
if (before_str) {
RedisModule_SaveSigned(rdb, 1);
RedisModule_SaveString(rdb, before_str);
} else {
RedisModule_SaveSigned(rdb, 0);
}
} else {
if (after_str) {
RedisModule_SaveSigned(rdb, 1);
RedisModule_SaveString(rdb, after_str);
} else {
RedisModule_SaveSigned(rdb, 0);
}
}
}
int testrdb_aux_load(RedisModuleIO *rdb, int encver, int when) {
assert(encver == 1);
if (conf_aux_count==1) assert(when == REDISMODULE_AUX_AFTER_RDB);
if (conf_aux_count==0) assert(0);
RedisModuleCtx *ctx = RedisModule_GetContextFromIO(rdb);
if (when == REDISMODULE_AUX_BEFORE_RDB) {
if (async_loading == 0) {
if (before_str)
RedisModule_FreeString(ctx, before_str);
before_str = NULL;
int count = RedisModule_LoadSigned(rdb);
if (RedisModule_IsIOError(rdb))
return REDISMODULE_ERR;
if (count)
before_str = RedisModule_LoadString(rdb);
} else {
if (before_str_temp)
RedisModule_FreeString(ctx, before_str_temp);
before_str_temp = NULL;
int count = RedisModule_LoadSigned(rdb);
if (RedisModule_IsIOError(rdb))
return REDISMODULE_ERR;
if (count)
before_str_temp = RedisModule_LoadString(rdb);
}
} else {
if (async_loading == 0) {
if (after_str)
RedisModule_FreeString(ctx, after_str);
after_str = NULL;
int count = RedisModule_LoadSigned(rdb);
if (RedisModule_IsIOError(rdb))
return REDISMODULE_ERR;
if (count)
after_str = RedisModule_LoadString(rdb);
} else {
if (after_str_temp)
RedisModule_FreeString(ctx, after_str_temp);
after_str_temp = NULL;
int count = RedisModule_LoadSigned(rdb);
if (RedisModule_IsIOError(rdb))
return REDISMODULE_ERR;
if (count)
after_str_temp = RedisModule_LoadString(rdb);
}
}
if (RedisModule_IsIOError(rdb))
return REDISMODULE_ERR;
return REDISMODULE_OK;
}
void testrdb_type_free(void *value) {
if (value)
RedisModule_FreeString(NULL, (RedisModuleString*)value);
}
int testrdb_set_before(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
if (argc != 2) {
RedisModule_WrongArity(ctx);
return REDISMODULE_OK;
}
if (before_str)
RedisModule_FreeString(ctx, before_str);
before_str = argv[1];
RedisModule_RetainString(ctx, argv[1]);
RedisModule_ReplyWithLongLong(ctx, 1);
return REDISMODULE_OK;
}
int testrdb_get_before(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
REDISMODULE_NOT_USED(argv);
if (argc != 1){
RedisModule_WrongArity(ctx);
return REDISMODULE_OK;
}
if (before_str)
RedisModule_ReplyWithString(ctx, before_str);
else
RedisModule_ReplyWithStringBuffer(ctx, "", 0);
return REDISMODULE_OK;
}
/* For purpose of testing module events, expose variable state during async_loading. */
int testrdb_async_loading_get_before(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
REDISMODULE_NOT_USED(argv);
if (argc != 1){
RedisModule_WrongArity(ctx);
return REDISMODULE_OK;
}
if (before_str_temp)
RedisModule_ReplyWithString(ctx, before_str_temp);
else
RedisModule_ReplyWithStringBuffer(ctx, "", 0);
return REDISMODULE_OK;
}
int testrdb_set_after(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
if (argc != 2){
RedisModule_WrongArity(ctx);
return REDISMODULE_OK;
}
if (after_str)
RedisModule_FreeString(ctx, after_str);
after_str = argv[1];
RedisModule_RetainString(ctx, argv[1]);
RedisModule_ReplyWithLongLong(ctx, 1);
return REDISMODULE_OK;
}
int testrdb_get_after(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
REDISMODULE_NOT_USED(argv);
if (argc != 1){
RedisModule_WrongArity(ctx);
return REDISMODULE_OK;
}
if (after_str)
RedisModule_ReplyWithString(ctx, after_str);
else
RedisModule_ReplyWithStringBuffer(ctx, "", 0);
return REDISMODULE_OK;
}
int testrdb_set_key(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
if (argc != 3){
RedisModule_WrongArity(ctx);
return REDISMODULE_OK;
}
RedisModuleKey *key = RedisModule_OpenKey(ctx, argv[1], REDISMODULE_WRITE);
RedisModuleString *str = RedisModule_ModuleTypeGetValue(key);
if (str)
RedisModule_FreeString(ctx, str);
RedisModule_ModuleTypeSetValue(key, testrdb_type, argv[2]);
RedisModule_RetainString(ctx, argv[2]);
RedisModule_CloseKey(key);
RedisModule_ReplyWithLongLong(ctx, 1);
return REDISMODULE_OK;
}
int testrdb_get_key(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
if (argc != 2){
RedisModule_WrongArity(ctx);
return REDISMODULE_OK;
}
RedisModuleKey *key = RedisModule_OpenKey(ctx, argv[1], REDISMODULE_READ);
RedisModuleString *str = RedisModule_ModuleTypeGetValue(key);
RedisModule_CloseKey(key);
RedisModule_ReplyWithString(ctx, str);
return REDISMODULE_OK;
}
int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
if (RedisModule_Init(ctx,"testrdb",1,REDISMODULE_APIVER_1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
RedisModule_SetModuleOptions(ctx, REDISMODULE_OPTIONS_HANDLE_IO_ERRORS | REDISMODULE_OPTIONS_HANDLE_REPL_ASYNC_LOAD);
if (argc > 0)
RedisModule_StringToLongLong(argv[0], &conf_aux_count);
if (conf_aux_count==0) {
RedisModuleTypeMethods datatype_methods = {
.version = 1,
.rdb_load = testrdb_type_load,
.rdb_save = testrdb_type_save,
.aof_rewrite = NULL,
.digest = NULL,
.free = testrdb_type_free,
};
testrdb_type = RedisModule_CreateDataType(ctx, "test__rdb", 1, &datatype_methods);
if (testrdb_type == NULL)
return REDISMODULE_ERR;
} else {
RedisModuleTypeMethods datatype_methods = {
.version = REDISMODULE_TYPE_METHOD_VERSION,
.rdb_load = testrdb_type_load,
.rdb_save = testrdb_type_save,
.aof_rewrite = NULL,
.digest = NULL,
.free = testrdb_type_free,
.aux_load = testrdb_aux_load,
.aux_save = testrdb_aux_save,
.aux_save_triggers = (conf_aux_count == 1 ?
REDISMODULE_AUX_AFTER_RDB :
REDISMODULE_AUX_BEFORE_RDB | REDISMODULE_AUX_AFTER_RDB)
};
testrdb_type = RedisModule_CreateDataType(ctx, "test__rdb", 1, &datatype_methods);
if (testrdb_type == NULL)
return REDISMODULE_ERR;
}
if (RedisModule_CreateCommand(ctx,"testrdb.set.before", testrdb_set_before,"deny-oom",0,0,0) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"testrdb.get.before", testrdb_get_before,"",0,0,0) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"testrdb.async_loading.get.before", testrdb_async_loading_get_before,"",0,0,0) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"testrdb.set.after", testrdb_set_after,"deny-oom",0,0,0) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"testrdb.get.after", testrdb_get_after,"",0,0,0) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"testrdb.set.key", testrdb_set_key,"deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"testrdb.get.key", testrdb_get_key,"",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
RedisModule_SubscribeToServerEvent(ctx,
RedisModuleEvent_ReplAsyncLoad, replAsyncLoadCallback);
return REDISMODULE_OK;
}
int RedisModule_OnUnload(RedisModuleCtx *ctx) {
if (before_str)
RedisModule_FreeString(ctx, before_str);
if (after_str)
RedisModule_FreeString(ctx, after_str);
if (before_str_temp)
RedisModule_FreeString(ctx, before_str_temp);
if (after_str_temp)
RedisModule_FreeString(ctx, after_str_temp);
return REDISMODULE_OK;
}
|
