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diff --git a/src/frontend/query.c b/src/frontend/query.c
index 56cd4ec86638ef537d8bdc09fabc15e4b90ed0b0..9a157fb892d10888e35a74c84d77d5a18e635599 100644 (file)
--- a/src/frontend/query.c
+++ b/src/frontend/query.c
#include <ctype.h>
#include <string.h>
+/*
+ * metric fetcher:
+ * Implements the callbacks necessary to read a metric object.
+ * TODO: FETCH should allow to ignore child elements (attributes); then, we'd
+ * only need store_host/store_metric.
+ */
+
+typedef struct {
+ char *type;
+ char *id;
+} metric_store_t;
+
+static int
+metric_fetcher_host(sdb_store_host_t __attribute__((unused)) *host,
+ sdb_object_t __attribute__((unused)) *user_data)
+{
+ return 0;
+} /* metric_fetcher_host */
+
+static int
+metric_fetcher_metric(sdb_store_metric_t *metric, sdb_object_t *user_data)
+{
+ metric_store_t *st = SDB_OBJ_WRAPPER(user_data)->data;
+
+ if ((! metric->store.type) || (! metric->store.id))
+ return 0;
+
+ st->type = strdup(metric->store.type);
+ st->id = strdup(metric->store.id);
+ if ((! st->type) || (! st->id))
+ return -1;
+ return 0;
+} /* metric_fetcher_metric */
+
+static int
+metric_fetcher_attr(sdb_store_attribute_t __attribute__((unused)) *attr,
+ sdb_object_t __attribute__((unused)) *user_data)
+{
+ return 0;
+} /* metric_fetcher_attr */
+
+static sdb_store_writer_t metric_fetcher = {
+ metric_fetcher_host, NULL, metric_fetcher_metric, metric_fetcher_attr,
+};
+
/*
* private helper functions
*/
return s ? strlen(s) : 0;
} /* sstrlen */
+static int
+exec_query(sdb_ast_node_t *ast, sdb_strbuf_t *buf, sdb_strbuf_t *errbuf)
+{
+ sdb_store_json_formatter_t *f;
+ int type = 0, flags = 0;
+ uint32_t res_type = 0;
+ int status;
+
+ switch (ast->type) {
+ case SDB_AST_TYPE_FETCH:
+ type = SDB_AST_FETCH(ast)->obj_type;
+ res_type = htonl(SDB_CONNECTION_FETCH);
+ break;
+ case SDB_AST_TYPE_LIST:
+ type = SDB_AST_LIST(ast)->obj_type;
+ flags = SDB_WANT_ARRAY;
+ res_type = htonl(SDB_CONNECTION_LIST);
+ break;
+ case SDB_AST_TYPE_LOOKUP:
+ type = SDB_AST_LOOKUP(ast)->obj_type;
+ flags = SDB_WANT_ARRAY;
+ res_type = htonl(SDB_CONNECTION_LOOKUP);
+ break;
+ default:
+ sdb_strbuf_sprintf(errbuf, "invalid command %s (%#x)",
+ SDB_AST_TYPE_TO_STRING(ast), ast->type);
+ return -1;
+ }
+
+ f = sdb_store_json_formatter(buf, type, flags);
+ sdb_strbuf_memcpy(buf, &res_type, sizeof(res_type));
+ status = sdb_plugin_query(ast, &sdb_store_json_writer, SDB_OBJ(f), errbuf);
+ if (status < 0)
+ sdb_strbuf_clear(buf);
+ sdb_store_json_finish(f);
+ sdb_object_deref(SDB_OBJ(f));
+ return status;
+} /* exec_query */
+
static int
exec_store(sdb_ast_store_t *st, sdb_strbuf_t *buf, sdb_strbuf_t *errbuf)
{
} /* exec_store */
static int
-exec_query(sdb_conn_t *conn, sdb_ast_node_t *ast)
+exec_timeseries(sdb_ast_timeseries_t *ts, sdb_strbuf_t *buf, sdb_strbuf_t *errbuf)
+{
+ metric_store_t st = { NULL, NULL };
+ sdb_object_wrapper_t obj = SDB_OBJECT_WRAPPER_STATIC(&st);
+ sdb_ast_fetch_t fetch = SDB_AST_FETCH_INIT;
+ sdb_timeseries_opts_t opts = { 0, 0 };
+ sdb_timeseries_t *series = NULL;
+ int status;
+
+ if ((! ts) || (! ts->hostname) || (! ts->metric))
+ return -1;
+
+ fetch.obj_type = SDB_METRIC;
+ fetch.hostname = strdup(ts->hostname);
+ fetch.name = strdup(ts->metric);
+ opts.start = ts->start;
+ opts.end = ts->end;
+
+ status = sdb_plugin_query(SDB_AST_NODE(&fetch),
+ &metric_fetcher, SDB_OBJ(&obj), errbuf);
+ if ((status < 0) || (! st.type) || (! st.id)) {
+ sdb_log(SDB_LOG_ERR, "frontend: Failed to fetch time-series '%s/%s' "
+ "- no data-store configured for the stored metric",
+ ts->hostname, ts->metric);
+ status = -1;
+ }
+ if (status >= 0) {
+ series = sdb_plugin_fetch_timeseries(st.type, st.id, &opts);
+ if (! series) {
+ sdb_log(SDB_LOG_ERR, "frontend: Failed to fetch time-series '%s/%s' "
+ "- %s fetcher callback returned no data for '%s'",
+ ts->hostname, ts->metric, st.type, st.id);
+ status = -1;
+ }
+ }
+
+ if (status >= 0) {
+ sdb_timeseries_tojson(series, buf);
+ sdb_timeseries_destroy(series);
+ }
+
+ free(fetch.hostname);
+ free(fetch.name);
+ if (st.type)
+ free(st.type);
+ if (st.id)
+ free(st.id);
+ return status;
+} /* exec_timeseries */
+
+static int
+exec_cmd(sdb_conn_t *conn, sdb_ast_node_t *ast)
{
sdb_strbuf_t *buf;
int status;
sdb_strbuf_sprintf(conn->errbuf, "Out of memory");
return -1;
}
+
if (ast->type == SDB_AST_TYPE_STORE)
status = exec_store(SDB_AST_STORE(ast), buf, conn->errbuf);
+ else if (ast->type == SDB_AST_TYPE_TIMESERIES)
+ status = exec_timeseries(SDB_AST_TIMESERIES(ast), buf, conn->errbuf);
else
- status = sdb_plugin_query(ast, buf, conn->errbuf);
+ status = exec_query(ast, buf, conn->errbuf);
+
if (status < 0) {
char query[conn->cmd_len + 1];
strncpy(query, sdb_strbuf_string(conn->buf), conn->cmd_len);
sdb_strbuf_destroy(buf);
return status < 0 ? status : 0;
-} /* exec_query */
+} /* exec_cmd */
/*
* public API
}
if (ast) {
- status = exec_query(conn, ast);
+ status = exec_cmd(conn, ast);
sdb_object_deref(SDB_OBJ(ast));
}
sdb_llist_destroy(parsetree);
hostname[0] ? strdup(hostname) : NULL,
name[0] ? strdup(name) : NULL,
/* filter = */ NULL);
- status = exec_query(conn, ast);
+ status = exec_cmd(conn, ast);
sdb_object_deref(SDB_OBJ(ast));
return status;
} /* sdb_conn_fetch */
}
ast = sdb_ast_list_create((int)type, /* filter = */ NULL);
- status = exec_query(conn, ast);
+ status = exec_cmd(conn, ast);
sdb_object_deref(SDB_OBJ(ast));
return status;
} /* sdb_conn_list */
}
ast = sdb_ast_lookup_create((int)type, m, /* filter = */ NULL);
- status = exec_query(conn, ast);
+ status = exec_cmd(conn, ast);
if (! ast)
sdb_object_deref(SDB_OBJ(m));
sdb_object_deref(SDB_OBJ(ast));
status = sdb_parser_analyze(ast, conn->errbuf);
if (! status)
- status = exec_query(conn, ast);
+ status = exec_cmd(conn, ast);
sdb_object_deref(SDB_OBJ(ast));
return status;
} /* sdb_conn_store */