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diff --git a/src/core/plugin.c b/src/core/plugin.c
index 3ba98df263cb7a3e257fbcac2a7dd364005ca979..83ef6ead9cb150aa447515ba60036691eedfd451 100644 (file)
--- a/src/core/plugin.c
+++ b/src/core/plugin.c
} writer_t;
#define WRITER(obj) ((writer_t *)(obj))
+typedef struct {
+ callback_t super; /* cb_callback will always be NULL */
+#define r_user_data super.cb_user_data
+#define r_ctx super.cb_ctx
+ sdb_store_reader_t impl;
+} reader_t;
+#define READER(obj) ((reader_t *)(obj))
+
/*
* private variables
*/
static sdb_llist_t *log_list = NULL;
static sdb_llist_t *ts_fetcher_list = NULL;
static sdb_llist_t *writer_list = NULL;
+static sdb_llist_t *reader_list = NULL;
static struct {
const char *type;
{ "log", &log_list },
{ "timeseries fetcher", &ts_fetcher_list },
{ "store writer", &writer_list },
+ { "store reader", &reader_list },
};
/*
assert(impl);
if ((! impl->store_host) || (! impl->store_service)
- || (! impl->store_metric) || (! impl->store_attribute)
- || (! impl->store_service_attr) || (! impl->store_metric_attr)) {
+ || (! impl->store_metric) || (! impl->store_attribute)) {
sdb_log(SDB_LOG_ERR, "core: store writer callback '%s' "
"does not fully implement the writer interface.",
obj->name);
plugin_writer_destroy
};
+static int
+plugin_reader_init(sdb_object_t *obj, va_list ap)
+{
+ sdb_store_reader_t *impl = va_arg(ap, sdb_store_reader_t *);
+ sdb_object_t *ud = va_arg(ap, sdb_object_t *);
+
+ assert(impl);
+
+ if ((! impl->prepare_query) || (! impl->execute_query)) {
+ sdb_log(SDB_LOG_ERR, "core: store reader callback '%s' "
+ "does not fully implement the reader interface.",
+ obj->name);
+ return -1;
+ }
+ if (sdb_llist_search_by_name(reader_list, obj->name)) {
+ sdb_log(SDB_LOG_WARNING, "core: store reader callback '%s' "
+ "has already been registered. Ignoring newly "
+ "registered version.", obj->name);
+ return -1;
+ }
+
+ /* ctx may be NULL if the callback was not registered by a plugin */
+
+ READER(obj)->impl = *impl;
+ READER(obj)->r_ctx = ctx_get();
+ sdb_object_ref(SDB_OBJ(READER(obj)->r_ctx));
+
+ sdb_object_ref(ud);
+ READER(obj)->r_user_data = ud;
+ return 0;
+} /* plugin_reader_init */
+
+static void
+plugin_reader_destroy(sdb_object_t *obj)
+{
+ assert(obj);
+ sdb_object_deref(READER(obj)->r_user_data);
+ sdb_object_deref(SDB_OBJ(READER(obj)->r_ctx));
+} /* plugin_reader_destroy */
+
+static sdb_type_t reader_type = {
+ sizeof(reader_t),
+
+ plugin_reader_init,
+ plugin_reader_destroy
+};
+
static int
module_init(const char *name, lt_dlhandle lh, sdb_plugin_info_t *info)
{
return 0;
} /* plugin_add_callback */
+static void
+get_backend(const char **backends, size_t *backends_num)
+{
+ const sdb_plugin_info_t *info;
+
+ info = sdb_plugin_current();
+ if ((! info) || (! info->plugin_name) || (! *info->plugin_name)) {
+ *backends_num = 0;
+ return;
+ }
+
+ backends[0] = info->plugin_name;
+ *backends_num = 1;
+} /* get_backend */
+
/*
* public API
*/
return 0;
} /* sdb_store_register_writer */
+int
+sdb_plugin_register_reader(const char *name,
+ sdb_store_reader_t *reader, sdb_object_t *user_data)
+{
+ char cb_name[1024];
+ sdb_object_t *obj;
+
+ if ((! name) || (! reader))
+ return -1;
+
+ if (! reader_list)
+ reader_list = sdb_llist_create();
+ if (! reader_list)
+ return -1;
+
+ plugin_get_name(name, cb_name, sizeof(cb_name));
+
+ obj = sdb_object_create(cb_name, reader_type,
+ reader, user_data);
+ if (! obj)
+ return -1;
+
+ if (sdb_llist_append(reader_list, obj)) {
+ sdb_object_deref(obj);
+ return -1;
+ }
+
+ /* pass control to the list */
+ sdb_object_deref(obj);
+
+ sdb_log(SDB_LOG_INFO, "core: Registered store reader callback '%s'.",
+ cb_name);
+ return 0;
+} /* sdb_plugin_register_reader */
+
void
sdb_plugin_unregister_all(void)
{
return ts;
} /* sdb_plugin_fetch_timeseries */
+int
+sdb_plugin_query(sdb_ast_node_t *ast, sdb_strbuf_t *buf, sdb_strbuf_t *errbuf)
+{
+ size_t n = sdb_llist_len(reader_list);
+ reader_t *reader;
+ sdb_object_t *q;
+ int status = 0;
+
+ if (! ast)
+ return 0;
+
+ if ((ast->type != SDB_AST_TYPE_FETCH)
+ && (ast->type != SDB_AST_TYPE_LIST)
+ && (ast->type != SDB_AST_TYPE_LOOKUP)
+ && (ast->type != SDB_AST_TYPE_TIMESERIES)) {
+ sdb_log(SDB_LOG_ERR, "core: Cannot execute query of type %s",
+ SDB_AST_TYPE_TO_STRING(ast));
+ sdb_strbuf_sprintf(errbuf, "Cannot execute query of type %s",
+ SDB_AST_TYPE_TO_STRING(ast));
+ return -1;
+ }
+
+ if (n != 1) {
+ char *msg = (n > 0)
+ ? "Cannot execute query: multiple readers not supported"
+ : "Cannot execute query: no readers registered";
+ sdb_strbuf_sprintf(errbuf, "%s", msg);
+ sdb_log(SDB_LOG_ERR, "core: %s", msg);
+ return -1;
+ }
+
+ reader = READER(sdb_llist_get(reader_list, 0));
+ assert(reader);
+
+ q = reader->impl.prepare_query(ast, errbuf, reader->r_user_data);
+ if (q)
+ status = reader->impl.execute_query(q, buf, errbuf, reader->r_user_data);
+ else
+ status = -1;
+
+ sdb_object_deref(SDB_OBJ(q));
+ sdb_object_deref(SDB_OBJ(reader));
+ return status;
+} /* sdb_plugin_query */
+
int
sdb_plugin_store_host(const char *name, sdb_time_t last_update)
{
+ sdb_store_host_t host = { 0 };
+ const char *backends[1];
+ char *cname;
+
sdb_llist_iter_t *iter;
int status = 0;
if (! name)
return -1;
+ if (! sdb_llist_len(writer_list)) {
+ sdb_log(SDB_LOG_ERR, "core: Cannot store host: "
+ "no writers registered");
+ return -1;
+ }
+
+ cname = sdb_plugin_cname(strdup(name));
+ if (! cname) {
+ sdb_log(SDB_LOG_ERR, "core: strdup failed");
+ return -1;
+ }
+
+ host.name = cname;
+ host.last_update = last_update;
+ host.backends = backends;
+ get_backend(host.backends, &host.backends_num);
+
iter = sdb_llist_get_iter(writer_list);
while (sdb_llist_iter_has_next(iter)) {
writer_t *writer = WRITER(sdb_llist_iter_get_next(iter));
int s;
assert(writer);
- s = writer->impl.store_host(name, last_update, writer->w_user_data);
+ s = writer->impl.store_host(&host, writer->w_user_data);
if (((s > 0) && (status >= 0)) || (s < 0))
status = s;
}
sdb_llist_iter_destroy(iter);
+ free(cname);
return status;
} /* sdb_plugin_store_host */
sdb_plugin_store_service(const char *hostname, const char *name,
sdb_time_t last_update)
{
+ sdb_store_service_t service = { 0 };
+ const char *backends[1];
+ char *cname;
+
sdb_llist_iter_t *iter;
+ sdb_data_t d;
+
int status = 0;
if ((! hostname) || (! name))
return -1;
+ if (! sdb_llist_len(writer_list)) {
+ sdb_log(SDB_LOG_ERR, "core: Cannot store service: "
+ "no writers registered");
+ return -1;
+ }
+
+ cname = sdb_plugin_cname(strdup(hostname));
+ if (! cname) {
+ sdb_log(SDB_LOG_ERR, "core: strdup failed");
+ return -1;
+ }
+
+ service.hostname = cname;
+ service.name = name;
+ service.last_update = last_update;
+ service.backends = backends;
+ get_backend(service.backends, &service.backends_num);
+
iter = sdb_llist_get_iter(writer_list);
while (sdb_llist_iter_has_next(iter)) {
writer_t *writer = WRITER(sdb_llist_iter_get_next(iter));
int s;
assert(writer);
- s = writer->impl.store_service(hostname, name, last_update,
- writer->w_user_data);
+ s = writer->impl.store_service(&service, writer->w_user_data);
if (((s > 0) && (status >= 0)) || (s < 0))
status = s;
}
sdb_llist_iter_destroy(iter);
+
+ if (! status) {
+ /* record the hostname as an attribute */
+ d.type = SDB_TYPE_STRING;
+ d.data.string = cname;
+ if (sdb_plugin_store_service_attribute(cname, name,
+ "hostname", &d, last_update))
+ status = -1;
+ }
+
+ free(cname);
return status;
} /* sdb_plugin_store_service */
sdb_plugin_store_metric(const char *hostname, const char *name,
sdb_metric_store_t *store, sdb_time_t last_update)
{
+ sdb_store_metric_t metric = { 0 };
+ const char *backends[1];
+ char *cname;
+
sdb_llist_iter_t *iter;
+ sdb_data_t d;
+
int status = 0;
if ((! hostname) || (! name))
return -1;
+ if (! sdb_llist_len(writer_list)) {
+ sdb_log(SDB_LOG_ERR, "core: Cannot store metric: "
+ "no writers registered");
+ return -1;
+ }
+
+ cname = sdb_plugin_cname(strdup(hostname));
+ if (! cname) {
+ sdb_log(SDB_LOG_ERR, "core: strdup failed");
+ return -1;
+ }
+
if (store && ((! store->type) || (! store->id)))
store = NULL;
+ metric.hostname = cname;
+ metric.name = name;
+ if (store) {
+ metric.store.type = store->type;
+ metric.store.id = store->id;
+ }
+ metric.last_update = last_update;
+ metric.backends = backends;
+ get_backend(metric.backends, &metric.backends_num);
+
iter = sdb_llist_get_iter(writer_list);
while (sdb_llist_iter_has_next(iter)) {
writer_t *writer = WRITER(sdb_llist_iter_get_next(iter));
int s;
assert(writer);
- s = writer->impl.store_metric(hostname, name, store, last_update,
- writer->w_user_data);
+ s = writer->impl.store_metric(&metric, writer->w_user_data);
if (((s > 0) && (status >= 0)) || (s < 0))
status = s;
}
sdb_llist_iter_destroy(iter);
+
+ if (! status) {
+ /* record the hostname as an attribute */
+ d.type = SDB_TYPE_STRING;
+ d.data.string = cname;
+ if (sdb_plugin_store_metric_attribute(cname, name,
+ "hostname", &d, last_update))
+ status = -1;
+ }
+
+ free(cname);
return status;
} /* sdb_plugin_store_metric */
sdb_plugin_store_attribute(const char *hostname, const char *key,
const sdb_data_t *value, sdb_time_t last_update)
{
+ sdb_store_attribute_t attr = { 0 };
+ const char *backends[1];
+ char *cname;
+
sdb_llist_iter_t *iter;
int status = 0;
if ((! hostname) || (! key) || (! value))
return -1;
+ if (! sdb_llist_len(writer_list)) {
+ sdb_log(SDB_LOG_ERR, "core: Cannot store attribute: "
+ "no writers registered");
+ return -1;
+ }
+
+ cname = sdb_plugin_cname(strdup(hostname));
+ if (! cname) {
+ sdb_log(SDB_LOG_ERR, "core: strdup failed");
+ return -1;
+ }
+
+ attr.parent_type = SDB_HOST;
+ attr.parent = cname;
+ attr.key = key;
+ attr.value = *value;
+ attr.last_update = last_update;
+ attr.backends = backends;
+ get_backend(attr.backends, &attr.backends_num);
+
iter = sdb_llist_get_iter(writer_list);
while (sdb_llist_iter_has_next(iter)) {
writer_t *writer = WRITER(sdb_llist_iter_get_next(iter));
int s;
assert(writer);
- s = writer->impl.store_attribute(hostname, key, value, last_update,
- writer->w_user_data);
+ s = writer->impl.store_attribute(&attr, writer->w_user_data);
if (((s > 0) && (status >= 0)) || (s < 0))
status = s;
}
sdb_llist_iter_destroy(iter);
+ free(cname);
return status;
} /* sdb_plugin_store_attribute */
sdb_plugin_store_service_attribute(const char *hostname, const char *service,
const char *key, const sdb_data_t *value, sdb_time_t last_update)
{
+ sdb_store_attribute_t attr = { 0 };
+ const char *backends[1];
+ char *cname;
+
sdb_llist_iter_t *iter;
int status = 0;
if ((! hostname) || (! service) || (! key) || (! value))
return -1;
+ if (! sdb_llist_len(writer_list)) {
+ sdb_log(SDB_LOG_ERR, "core: Cannot store service attribute: "
+ "no writers registered");
+ return -1;
+ }
+
+ cname = sdb_plugin_cname(strdup(hostname));
+ if (! cname) {
+ sdb_log(SDB_LOG_ERR, "core: strdup failed");
+ return -1;
+ }
+
+ attr.hostname = cname;
+ attr.parent_type = SDB_SERVICE;
+ attr.parent = service;
+ attr.key = key;
+ attr.value = *value;
+ attr.last_update = last_update;
+ attr.backends = backends;
+ get_backend(attr.backends, &attr.backends_num);
+
iter = sdb_llist_get_iter(writer_list);
while (sdb_llist_iter_has_next(iter)) {
writer_t *writer = WRITER(sdb_llist_iter_get_next(iter));
int s;
assert(writer);
- s = writer->impl.store_service_attr(hostname, service,
- key, value, last_update, writer->w_user_data);
+ s = writer->impl.store_attribute(&attr, writer->w_user_data);
if (((s > 0) && (status >= 0)) || (s < 0))
status = s;
}
sdb_llist_iter_destroy(iter);
+ free(cname);
return status;
} /* sdb_plugin_store_service_attribute */
sdb_plugin_store_metric_attribute(const char *hostname, const char *metric,
const char *key, const sdb_data_t *value, sdb_time_t last_update)
{
+ sdb_store_attribute_t attr = { 0 };
+ const char *backends[1];
+ char *cname;
+
sdb_llist_iter_t *iter;
int status = 0;
if ((! hostname) || (! metric) || (! key) || (! value))
return -1;
+ if (! sdb_llist_len(writer_list)) {
+ sdb_log(SDB_LOG_ERR, "core: Cannot store metric attribute: "
+ "no writers registered");
+ return -1;
+ }
+
+ cname = sdb_plugin_cname(strdup(hostname));
+ if (! cname) {
+ sdb_log(SDB_LOG_ERR, "core: strdup failed");
+ return -1;
+ }
+
+ attr.hostname = cname;
+ attr.parent_type = SDB_METRIC;
+ attr.parent = metric;
+ attr.key = key;
+ attr.value = *value;
+ attr.last_update = last_update;
+ attr.backends = backends;
+ get_backend(attr.backends, &attr.backends_num);
+
iter = sdb_llist_get_iter(writer_list);
while (sdb_llist_iter_has_next(iter)) {
writer_t *writer = WRITER(sdb_llist_iter_get_next(iter));
int s;
assert(writer);
- s = writer->impl.store_metric_attr(hostname, metric,
- key, value, last_update, writer->w_user_data);
+ s = writer->impl.store_attribute(&attr, writer->w_user_data);
if (((s > 0) && (status >= 0)) || (s < 0))
status = s;
}
sdb_llist_iter_destroy(iter);
+ free(cname);
return status;
} /* sdb_plugin_store_metric_attribute */