1 /*
2 * SysDB - src/core/memstore-private.h
3 * Copyright (C) 2012-2013 Sebastian 'tokkee' Harl <sh@tokkee.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
28 /*
29 * private data structures used by the memstore module
30 */
32 #ifndef SDB_CORE_MEMSTORE_PRIVATE_H
33 #define SDB_CORE_MEMSTORE_PRIVATE_H 1
35 #include "core/memstore.h"
36 #include "core/store.h"
37 #include "utils/avltree.h"
39 #include <sys/types.h>
40 #include <regex.h>
42 #ifdef __cplusplus
43 extern "C" {
44 #endif
46 /*
47 * core types
48 */
50 struct sdb_memstore_obj {
51 sdb_object_t super;
52 #define _name super.name
54 /* object type */
55 int type;
57 /* common meta information */
58 sdb_time_t last_update;
59 sdb_time_t interval; /* moving average */
60 char **backends;
61 size_t backends_num;
62 sdb_memstore_obj_t *parent;
63 };
64 #define STORE_OBJ(obj) ((sdb_memstore_obj_t *)(obj))
65 #define STORE_CONST_OBJ(obj) ((const sdb_memstore_obj_t *)(obj))
67 typedef struct {
68 sdb_memstore_obj_t super;
70 sdb_data_t value;
71 } attr_t;
72 #define ATTR(obj) ((attr_t *)(obj))
73 #define CONST_ATTR(obj) ((const attr_t *)(obj))
75 typedef struct {
76 sdb_memstore_obj_t super;
78 sdb_avltree_t *attributes;
79 } service_t;
80 #define SVC(obj) ((service_t *)(obj))
81 #define CONST_SVC(obj) ((const service_t *)(obj))
83 typedef struct {
84 sdb_memstore_obj_t super;
86 sdb_avltree_t *attributes;
87 struct {
88 char *type;
89 char *id;
90 sdb_time_t last_update;
91 } store;
92 } metric_t;
93 #define METRIC(obj) ((metric_t *)(obj))
95 typedef struct {
96 sdb_memstore_obj_t super;
98 sdb_avltree_t *services;
99 sdb_avltree_t *metrics;
100 sdb_avltree_t *attributes;
101 } host_t;
102 #define HOST(obj) ((host_t *)(obj))
103 #define CONST_HOST(obj) ((const host_t *)(obj))
105 /* shortcuts for accessing service/host attributes */
106 #define _last_update super.last_update
107 #define _interval super.interval
109 /*
110 * querying
111 */
113 struct sdb_memstore_query {
114 sdb_object_t super;
115 sdb_ast_node_t *ast;
116 sdb_memstore_matcher_t *matcher;
117 sdb_memstore_matcher_t *filter;
118 };
119 #define QUERY(m) ((sdb_memstore_query_t *)(m))
121 /*
122 * expressions
123 */
125 enum {
126 TYPED_EXPR = -3, /* obj type stored in data.data.integer */
127 ATTR_VALUE = -2, /* attr name stored in data.data.string */
128 FIELD_VALUE = -1, /* field type stored in data.data.integer */
129 /* 0: const value (stored in data) */
130 /* >0: operator id */
131 };
133 struct sdb_memstore_expr {
134 sdb_object_t super;
136 int type; /* see above */
137 int data_type;
139 sdb_memstore_expr_t *left;
140 sdb_memstore_expr_t *right;
142 sdb_data_t data;
143 };
144 #define CONST_EXPR(v) { SDB_OBJECT_INIT, 0, (v).type, NULL, NULL, (v) }
145 #define EXPR_TO_STRING(e) \
146 (((e)->type == TYPED_EXPR) ? "<typed>" \
147 : ((e)->type == ATTR_VALUE) ? "attribute" \
148 : ((e)->type == FIELD_VALUE) ? SDB_FIELD_TO_NAME((e)->data.data.integer) \
149 : ((e)->type == 0) ? "<constant>" \
150 : ((e)->type > 0) ? SDB_DATA_OP_TO_STRING((e)->type) \
151 : "<unknown>")
153 /*
154 * matchers
155 */
157 /* when adding to this, also update 'MATCHER_SYM' below and 'matchers' in
158 * memstore_lookup.c */
159 enum {
160 MATCHER_OR,
161 MATCHER_AND,
162 MATCHER_NOT,
163 MATCHER_ANY,
164 MATCHER_ALL,
165 MATCHER_IN,
167 /* unary operators */
168 MATCHER_ISNULL,
169 MATCHER_ISTRUE,
170 MATCHER_ISFALSE,
172 /* ary operators */
173 MATCHER_LT,
174 MATCHER_LE,
175 MATCHER_EQ,
176 MATCHER_NE,
177 MATCHER_GE,
178 MATCHER_GT,
179 MATCHER_REGEX,
180 MATCHER_NREGEX,
182 /* a generic query */
183 MATCHER_QUERY,
184 };
186 #define MATCHER_SYM(t) \
187 (((t) == MATCHER_OR) ? "OR" \
188 : ((t) == MATCHER_AND) ? "AND" \
189 : ((t) == MATCHER_NOT) ? "NOT" \
190 : ((t) == MATCHER_ANY) ? "ANY" \
191 : ((t) == MATCHER_ALL) ? "ALL" \
192 : ((t) == MATCHER_IN) ? "IN" \
193 : ((t) == MATCHER_ISNULL) ? "IS NULL" \
194 : ((t) == MATCHER_ISTRUE) ? "IS TRUE" \
195 : ((t) == MATCHER_ISFALSE) ? "IS FALSE" \
196 : ((t) == MATCHER_LT) ? "<" \
197 : ((t) == MATCHER_LE) ? "<=" \
198 : ((t) == MATCHER_EQ) ? "=" \
199 : ((t) == MATCHER_NE) ? "!=" \
200 : ((t) == MATCHER_GE) ? ">=" \
201 : ((t) == MATCHER_GT) ? ">" \
202 : ((t) == MATCHER_REGEX) ? "=~" \
203 : ((t) == MATCHER_NREGEX) ? "!~" \
204 : ((t) == MATCHER_QUERY) ? "QUERY" \
205 : "UNKNOWN")
207 /* matcher base type */
208 struct sdb_memstore_matcher {
209 sdb_object_t super;
210 /* type of the matcher */
211 int type;
212 };
213 #define M(m) ((sdb_memstore_matcher_t *)(m))
215 /* infix operator matcher */
216 typedef struct {
217 sdb_memstore_matcher_t super;
219 /* left and right hand operands */
220 sdb_memstore_matcher_t *left;
221 sdb_memstore_matcher_t *right;
222 } op_matcher_t;
223 #define OP_M(m) ((op_matcher_t *)(m))
225 /* unary operator matcher */
226 typedef struct {
227 sdb_memstore_matcher_t super;
229 /* operand */
230 sdb_memstore_matcher_t *op;
231 } uop_matcher_t;
232 #define UOP_M(m) ((uop_matcher_t *)(m))
234 /* iter matcher */
235 typedef struct {
236 sdb_memstore_matcher_t super;
237 sdb_memstore_expr_t *iter;
238 sdb_memstore_matcher_t *m;
239 } iter_matcher_t;
240 #define ITER_M(m) ((iter_matcher_t *)(m))
242 /* compare operator matcher */
243 typedef struct {
244 sdb_memstore_matcher_t super;
246 /* left and right hand expressions */
247 sdb_memstore_expr_t *left;
248 sdb_memstore_expr_t *right;
249 } cmp_matcher_t;
250 #define CMP_M(m) ((cmp_matcher_t *)(m))
252 typedef struct {
253 sdb_memstore_matcher_t super;
254 sdb_memstore_expr_t *expr;
255 } unary_matcher_t;
256 #define UNARY_M(m) ((unary_matcher_t *)(m))
258 #ifdef __cplusplus
259 } /* extern "C" */
260 #endif
262 #endif /* ! SDB_CORE_MEMSTORE_H */
264 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */