X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=src%2Finclude%2Fcore%2Fstore.h;h=cde6ad0b8c2763dd15b4759b27f005b87441db5a;hb=c3cffe0ff4c8d37cbe2df874743a59e1ec514c71;hp=46cd53643a7ec8b1d63a5431d4fde5dc3b94c2fb;hpb=ec7449c79712d8fa29d63b7e8f1f08e183b916a1;p=sysdb.git diff --git a/src/include/core/store.h b/src/include/core/store.h index 46cd536..cde6ad0 100644 --- a/src/include/core/store.h +++ b/src/include/core/store.h @@ -30,8 +30,10 @@ #include "sysdb.h" #include "core/object.h" -#include "utils/time.h" +#include "core/data.h" +#include "core/time.h" #include "utils/llist.h" +#include "utils/strbuf.h" #include @@ -39,59 +41,28 @@ extern "C" { #endif -typedef struct { - sdb_object_t parent; - - sdb_time_t last_update; - char *name; -} sdb_store_obj_t; -#define SDB_STORE_OBJ_INIT { SDB_OBJECT_INIT, 0, NULL } -#define SDB_STORE_OBJ(obj) ((sdb_store_obj_t *)(obj)) - -typedef struct { - sdb_store_obj_t parent; - - char *hostname; -} sdb_service_t; -#define SDB_SVC_INIT { SDB_STORE_OBJ_INIT, NULL } -#define SDB_SVC(obj) ((sdb_service_t *)(obj)) - -typedef struct { - sdb_store_obj_t parent; - - char *attr_value; - char *hostname; -} sdb_attribute_t; -#define SDB_ATTR_INIT { SDB_STORE_OBJ_INIT, NULL, NULL } -#define SDB_ATTR(obj) ((sdb_attribute_t *)(obj)) - -typedef struct { - sdb_store_obj_t parent; - - sdb_llist_t *attributes; - sdb_llist_t *services; -} sdb_host_t; -#define SDB_HOST_INIT { SDB_STORE_OBJ_INIT, NULL, NULL } -#define SDB_HOST(obj) ((sdb_host_t *)(obj)) - -/* shortcuts for accessing the sdb_store_obj_t attributes of inheriting - * objects */ -#define _last_update parent.last_update -#define _name parent.name - -sdb_host_t * -sdb_host_create(const char *name); +/* + * sdb_store_base_t represents the super-class of any object stored in the + * database. It inherits from sdb_object_t and may safely be cast to a generic + * object to access its name. + */ +struct sdb_store_base; +typedef struct sdb_store_base sdb_store_base_t; -sdb_host_t * -sdb_host_clone(const sdb_host_t *host); +/* + * sdb_store_clear: + * Clear the entire store and remove all stored objects. + */ +void +sdb_store_clear(void); /* * sdb_store_host: - * Add/update a host in the store. If the host, identified by its name, - * already exists, it will be updated according to the specified 'host' - * object. Else, a new entry will be created in the store. Any memory required - * for storing the entry will be allocated an managed by the store itself. The - * specified host-object will not be referenced or further accessed. + * Add/update a host in the store. If the host, identified by its + * canonicalized name, already exists, it will be updated according to the + * specified name and timestamp. Else, a new entry will be created in the + * store. Any memory required for storing the entry will be allocated an + * managed by the store itself. * * Returns: * - 0 on success @@ -100,27 +71,30 @@ sdb_host_clone(const sdb_host_t *host); * - a negative value on error */ int -sdb_store_host(const sdb_host_t *host); - -const sdb_host_t * -sdb_store_get_host(const char *name); +sdb_store_host(const char *name, sdb_time_t last_update); -sdb_attribute_t * -sdb_attribute_create(const char *hostname, - const char *name, const char *value); +/* + * sdb_store_has_host: + * sdb_store_get_host: + * Query the store for a host by its (canonicalized) name. + * + * sdb_store_get_host increments the ref count of the host object. The caller + * needs to deref it when no longer using it. + */ +_Bool +sdb_store_has_host(const char *name); -sdb_attribute_t * -sdb_attribute_clone(const sdb_attribute_t *attr); +sdb_store_base_t * +sdb_store_get_host(const char *name); /* * sdb_store_attribute: * Add/update a host's attribute in the store. If the attribute, identified by - * its name, already exists for the specified host, it will be updated - * according to the specified 'attr' object. If the referenced host does not - * exist, an error will be reported. Else, a new entry will be created in the - * store. Any memory required for storing the entry will be allocated and - * managed by the store itself. The specified attribute-object will not be - * referenced or further accessed. + * its key, already exists for the specified host, it will be updated to the + * specified values. If the referenced host does not exist, an error will be + * reported. Else, a new entry will be created in the store. Any memory + * required for storing the entry will be allocated and managed by the store + * itself. * * Returns: * - 0 on success @@ -129,13 +103,9 @@ sdb_attribute_clone(const sdb_attribute_t *attr); * - a negative value on error */ int -sdb_store_attribute(const sdb_attribute_t *attr); - -sdb_service_t * -sdb_service_create(const char *hostname, const char *name); - -sdb_service_t * -sdb_service_clone(const sdb_service_t *svc); +sdb_store_attribute(const char *hostname, + const char *key, const sdb_data_t *value, + sdb_time_t last_update); /* * sdb_store_service: @@ -154,13 +124,170 @@ sdb_service_clone(const sdb_service_t *svc); * - a negative value on error */ int -sdb_store_service(const sdb_service_t *svc); +sdb_store_service(const char *hostname, const char *name, + sdb_time_t last_update); -const sdb_service_t * -sdb_store_get_service(const sdb_host_t *host, const char *name); +/* + * Store matchers may be used to lookup objects from the host based on their + * various attributes. Each type of matcher evaluates attributes of the + * respective object type. + * + * For each matcher object, *all* specified attributes have to match. + * + * A store matcher object inherits from sdb_object_t and, thus, may safely be + * cast to a generic object. + */ +struct sdb_store_matcher; +typedef struct sdb_store_matcher sdb_store_matcher_t; +#define SDB_STORE_MATCHER(obj) ((sdb_store_matcher_t *)(obj)) + +/* + * sdb_store_attr_matcher: + * Creates a matcher matching attributes based on their name or value. Either + * a complete name (which will have to match completely but case-independent) + * or an extended POSIX regular expression may be specified. + */ +sdb_store_matcher_t * +sdb_store_attr_matcher(const char *attr_name, const char *attr_name_re, + const char *attr_value, const char *attr_value_re); + +/* + * sdb_store_service_matcher: + * Creates a matcher matching services based on their name or attributes. + */ +sdb_store_matcher_t * +sdb_store_service_matcher(const char *service_name, const char *service_name_re, + sdb_store_matcher_t *attr_matcher); + +/* + * sdb_store_host_matcher: + * Creates a matcher matching hosts based on their name, services assigned to + * the host, or its attributes. + */ +sdb_store_matcher_t * +sdb_store_host_matcher(const char *host_name, const char *host_name_re, + sdb_store_matcher_t *service_matcher, + sdb_store_matcher_t *attr_matcher); +/* + * sdb_store_matcher_parse_cmp: + * Parse a simple compare expression (. ). + * + * Returns: + * - a matcher object on success + * - NULL else + */ +sdb_store_matcher_t * +sdb_store_matcher_parse_cmp(const char *obj_type, const char *attr, + const char *op, const char *value); + +/* + * sdb_store_dis_matcher: + * Creates a matcher matching the disjunction (logical OR) of two matchers. + */ +sdb_store_matcher_t * +sdb_store_dis_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right); + +/* + * sdb_store_con_matcher: + * Creates a matcher matching the conjunction (logical AND) of two matchers. + */ +sdb_store_matcher_t * +sdb_store_con_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right); + +/* + * sdb_store_con_matcher:: + * Creates a matcher matching the inverse (logical NOT) of a matcher. + */ +sdb_store_matcher_t * +sdb_store_inv_matcher(sdb_store_matcher_t *m); + +/* + * sdb_store_matcher_matches: + * Check whether the specified matcher matches the specified store object. + * + * Returns: + * - 1 if the object matches + * - 0 else + */ +int +sdb_store_matcher_matches(sdb_store_matcher_t *m, sdb_store_base_t *obj); + +/* + * sdb_store_lookup_cb: + * Lookup callback. It is called for each matching object when looking up data + * in the store. The lookup aborts if the callback returns non-zero. + */ +typedef int (*sdb_store_lookup_cb)(sdb_store_base_t *obj, void *user_data); + +/* + * sdb_store_lookup: + * Look up objects in the store. The specified callback function is called for + * each object in the store matching 'm'. + * + * Returns: + * - 0 on success + * - a negative value else + */ +int +sdb_store_lookup(sdb_store_matcher_t *m, sdb_store_lookup_cb cb, + void *user_data); + +/* + * Flags for serialization functions. + * + * By default, the full object will be included in the serialized output. When + * specifying any of the flags, the respective information will be left out. + */ +enum { + SDB_SKIP_ATTRIBUTES = 1 << 0, + SDB_SKIP_SERVICES = 1 << 1, + SDB_SKIP_SERVICE_ATTRIBUTES = 1 << 2, + + SDB_SKIP_ALL = 0xffff, +}; + +/* + * sdb_store_tojson: + * Serialize the entire store to JSON and append the result to the specified + * buffer. + * + * Returns: + * - 0 on success + * - a negative value on error + */ +int +sdb_store_tojson(sdb_strbuf_t *buf, int flags); + +/* + * sdb_store_host_tojson: + * Serialize a host object to JSON and append the result to the specified + * buffer. + * + * Returns: + * - 0 on success + * - a negative value on error + */ +int +sdb_store_host_tojson(sdb_store_base_t *host, sdb_strbuf_t *buf, int flags); + +/* + * sdb_store_iter_cb: + * Store iterator callback. Iteration stops if the callback returns non-zero. + */ +typedef int (*sdb_store_iter_cb)(sdb_store_base_t *obj, void *user_data); + +/* + * sdb_store_iterate: + * Iterate the entire store, calling the specified callback for each object. + * The user_data pointer is passed on to each call of the callback. + * + * Returns: + * - 0 on success + * - a negative value else + */ int -sdb_store_dump(FILE *fh); +sdb_store_iterate(sdb_store_iter_cb cb, void *user_data); #ifdef __cplusplus } /* extern "C" */