X-Git-Url: https://git.tokkee.org/?p=sysdb.git;a=blobdiff_plain;f=src%2Ffrontend%2Fquery.c;h=9a157fb892d10888e35a74c84d77d5a18e635599;hp=56cd4ec86638ef537d8bdc09fabc15e4b90ed0b0;hb=9a96acd759c31211aa512e174339a9c178c4eb83;hpb=b60d581597cc0210f2eb57f60b612bc182a44865 diff --git a/src/frontend/query.c b/src/frontend/query.c index 56cd4ec..9a157fb 100644 --- a/src/frontend/query.c +++ b/src/frontend/query.c @@ -43,6 +43,51 @@ #include #include +/* + * 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 */ @@ -59,6 +104,45 @@ sstrlen(const char *s) 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) { @@ -145,7 +229,58 @@ 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; @@ -160,10 +295,14 @@ exec_query(sdb_conn_t *conn, sdb_ast_node_t *ast) 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); @@ -176,7 +315,7 @@ exec_query(sdb_conn_t *conn, sdb_ast_node_t *ast) sdb_strbuf_destroy(buf); return status < 0 ? status : 0; -} /* exec_query */ +} /* exec_cmd */ /* * public API @@ -227,7 +366,7 @@ sdb_conn_query(sdb_conn_t *conn) } if (ast) { - status = exec_query(conn, ast); + status = exec_cmd(conn, ast); sdb_object_deref(SDB_OBJ(ast)); } sdb_llist_destroy(parsetree); @@ -266,7 +405,7 @@ sdb_conn_fetch(sdb_conn_t *conn) 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 */ @@ -292,7 +431,7 @@ sdb_conn_list(sdb_conn_t *conn) } 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 */ @@ -336,7 +475,7 @@ sdb_conn_lookup(sdb_conn_t *conn) } 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)); @@ -443,7 +582,7 @@ sdb_conn_store(sdb_conn_t *conn) 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 */