X-Git-Url: https://git.tokkee.org/?p=sysdb.git;a=blobdiff_plain;f=src%2Finclude%2Fcore%2Fstore.h;h=179b5d05a470a9f59e13b73c9826edfed9fa184e;hp=2253d55a417ed65f75a422c244810bbdd02e6f8f;hb=740f1a8839faaf3033ea23f4cf2eea0dc0209d13;hpb=13fe0f9ec3d161fab7a015054649910541d75f5e diff --git a/src/include/core/store.h b/src/include/core/store.h index 2253d55..179b5d0 100644 --- a/src/include/core/store.h +++ b/src/include/core/store.h @@ -33,6 +33,7 @@ #include "core/data.h" #include "core/time.h" #include "core/timeseries.h" +#include "parser/ast.h" #include "utils/strbuf.h" #include @@ -60,19 +61,26 @@ enum { SDB_FIELD_AGE, /* type: datetime */ SDB_FIELD_INTERVAL, /* type: datetime */ SDB_FIELD_BACKEND, /* type: array of strings */ + SDB_FIELD_VALUE, /* attributes only; type: type of the value */ }; #define SDB_STORE_TYPE_TO_NAME(t) \ (((t) == SDB_HOST) ? "host" \ : ((t) == SDB_SERVICE) ? "service" \ : ((t) == SDB_METRIC) ? "metric" \ - : ((t) == SDB_ATTRIBUTE) ? "attribute" : "unknown") + : ((t) == SDB_ATTRIBUTE) ? "attribute" \ + : ((t) == (SDB_ATTRIBUTE | SDB_HOST)) ? "host attribute" \ + : ((t) == (SDB_ATTRIBUTE | SDB_SERVICE)) ? "service attribute" \ + : ((t) == (SDB_ATTRIBUTE | SDB_METRIC)) ? "metric attribute" \ + : "unknown") #define SDB_FIELD_TO_NAME(f) \ (((f) == SDB_FIELD_NAME) ? "name" \ : ((f) == SDB_FIELD_LAST_UPDATE) ? "last-update" \ : ((f) == SDB_FIELD_AGE) ? "age" \ : ((f) == SDB_FIELD_INTERVAL) ? "interval" \ - : ((f) == SDB_FIELD_BACKEND) ? "backend" : "unknown") + : ((f) == SDB_FIELD_BACKEND) ? "backend" \ + : ((f) == SDB_FIELD_VALUE) ? "value" \ + : "unknown") #define SDB_FIELD_TYPE(f) \ (((f) == SDB_FIELD_NAME) ? SDB_TYPE_STRING \ @@ -80,6 +88,7 @@ enum { : ((f) == SDB_FIELD_AGE) ? SDB_TYPE_DATETIME \ : ((f) == SDB_FIELD_INTERVAL) ? SDB_TYPE_DATETIME \ : ((f) == SDB_FIELD_BACKEND) ? (SDB_TYPE_ARRAY | SDB_TYPE_STRING) \ + : ((f) == SDB_FIELD_VALUE) ? -1 /* unknown */ \ : -1) /* @@ -90,6 +99,14 @@ enum { struct sdb_store_obj; typedef struct sdb_store_obj sdb_store_obj_t; +/* + * A metric store describes how to access a metric's data. + */ +typedef struct { + const char *type; + const char *id; +} sdb_metric_store_t; + /* * Expressions represent arithmetic expressions based on stored objects and * their various attributes. @@ -101,6 +118,13 @@ struct sdb_store_expr; typedef struct sdb_store_expr sdb_store_expr_t; #define SDB_STORE_EXPR(obj) ((sdb_store_expr_t *)(obj)) +/* + * An expression iterator iterates over the values of an iterable expression + * (see sdb_store_expr_iterable). + */ +struct sdb_store_expr_iter; +typedef struct sdb_store_expr_iter sdb_store_expr_iter_t; + /* * Store matchers may be used to lookup hosts from the store based on their * various attributes. Service and attribute matchers are applied to a host's @@ -121,6 +145,28 @@ typedef struct sdb_store_matcher sdb_store_matcher_t; struct sdb_store_json_formatter; typedef struct sdb_store_json_formatter sdb_store_json_formatter_t; +/* + * A store writer describes the interface for plugins implementing a store. + */ +typedef struct { + int (*store_host)(const char *name, sdb_time_t last_update, + sdb_object_t *user_data); + int (*store_service)(const char *hostname, const char *name, + sdb_time_t last_update, sdb_object_t *user_data); + int (*store_metric)(const char *hostname, const char *name, + sdb_metric_store_t *store, sdb_time_t last_update, + sdb_object_t *user_data); + int (*store_attribute)(const char *hostname, + const char *key, const sdb_data_t *value, sdb_time_t last_update, + sdb_object_t *user_data); + int (*store_service_attr)(const char *hostname, const char *service, + const char *key, const sdb_data_t *value, sdb_time_t last_update, + sdb_object_t *user_data); + int (*store_metric_attr)(const char *hostname, const char *metric, + const char *key, const sdb_data_t *value, sdb_time_t last_update, + sdb_object_t *user_data); +} sdb_store_writer_t; + /* * sdb_store_clear: * Clear the entire store and remove all stored objects. @@ -216,14 +262,6 @@ int sdb_store_service_attr(const char *hostname, const char *service, const char *key, const sdb_data_t *value, sdb_time_t last_update); -/* - * A metric store describes how to access a metric's data. - */ -typedef struct { - const char *type; - const char *id; -} sdb_metric_store_t; - /* * sdb_store_metric: * Add/update a metric in the store. If the metric, identified by its name, @@ -322,6 +360,30 @@ int sdb_store_get_attr(sdb_store_obj_t *obj, const char *name, sdb_data_t *res, sdb_store_matcher_t *filter); +/* + * sdb_store_query_prepare: + * Prepare the query described by 'ast' for execution in a store. + * + * Returns: + * - a store matcher on success + * - NULL else + */ +sdb_store_matcher_t * +sdb_store_query_prepare(sdb_ast_node_t *ast); + +/* + * sdb_store_query_execute: + * Execute a previously prepared query. The query result will be written to + * 'buf' and any errors to 'errbuf'. + * + * Returns: + * - the result type (to be used by the server reply) + * - a negative value on error + */ +int +sdb_store_query_execute(sdb_store_matcher_t *m, + sdb_strbuf_t *buf, sdb_strbuf_t *errbuf); + /* * sdb_store_expr_create: * Creates an arithmetic expression implementing the specified operator on the @@ -399,6 +461,34 @@ int sdb_store_expr_eval(sdb_store_expr_t *expr, sdb_store_obj_t *obj, sdb_data_t *res, sdb_store_matcher_t *filter); +/* + * sdb_store_expr_iterable: + * Check whether an expression, evaluated in the specified context (HOST, + * SERVICE, METRIC) is iterable, that is, if it may evaluate to multiple + * values. + */ +bool +sdb_store_expr_iterable(sdb_store_expr_t *expr, int context); + +/* + * sdb_store_expr_iter: + * Iterate over the elements of an iterable expression. sdb_store_expr_iter + * returns NULL if the expression is not iterable (for the specified object). + * See also sdb_store_expr_iterable. + * + * sdb_store_expr_iter_get_next returns NULL if there is no next element. + */ +sdb_store_expr_iter_t * +sdb_store_expr_iter(sdb_store_expr_t *expr, sdb_store_obj_t *obj, + sdb_store_matcher_t *filter); +void +sdb_store_expr_iter_destroy(sdb_store_expr_iter_t *iter); + +bool +sdb_store_expr_iter_has_next(sdb_store_expr_iter_t *iter); +sdb_data_t +sdb_store_expr_iter_get_next(sdb_store_expr_iter_t *iter); + /* * sdb_store_dis_matcher: * Creates a matcher matching the disjunction (logical OR) of two matchers. @@ -422,19 +512,21 @@ sdb_store_inv_matcher(sdb_store_matcher_t *m); /* * sdb_store_any_matcher: - * Creates a matcher iterating over objects of the specified type. It matches - * if *any* of those objects match 'm'. + * Creates a matcher iterating over values of the first expression (which has + * to be iterable). It matches if *any* of those elements match 'm'. 'm' has + * to be an ary operation with the left operand unset. */ sdb_store_matcher_t * -sdb_store_any_matcher(int type, sdb_store_matcher_t *m); +sdb_store_any_matcher(sdb_store_expr_t *iter, sdb_store_matcher_t *m); /* * sdb_store_all_matcher: - * Creates a matcher iterating over objects of the specified type. It matches - * if *all* of those objects match 'm'. + * Creates a matcher iterating over values of the first expression (which has + * to be iterable). It matches if *all* of those elements match 'm'. 'm' has + * to be an ary operation with the left operand unset. */ sdb_store_matcher_t * -sdb_store_all_matcher(int type, sdb_store_matcher_t *m); +sdb_store_all_matcher(sdb_store_expr_t *iter, sdb_store_matcher_t *m); /* * sdb_store_in_matcher: @@ -445,6 +537,14 @@ sdb_store_all_matcher(int type, sdb_store_matcher_t *m); sdb_store_matcher_t * sdb_store_in_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right); +/* + * sdb_store_nin_matcher: + * Like sdb_store_in_matcher but matches if the left value is not included in + * the right value. + */ +sdb_store_matcher_t * +sdb_store_nin_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right); + /* * sdb_store_lt_matcher, sdb_store_le_matcher, sdb_store_eq_matcher, * sdb_store_ge_matcher, sdb_store_gt_matcher: