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diff --git a/src/frontend/query.c b/src/frontend/query.c
index fa493a6dd04be5a8139c0cae0485d2bea43703c6..149750b05782dc80311278f495fc994ad1b9cf1f 100644 (file)
--- a/src/frontend/query.c
+++ b/src/frontend/query.c
/*
* SysDB - src/frontend/query.c
- * Copyright (C) 2013 Sebastian 'tokkee' Harl <sh@tokkee.org>
+ * Copyright (C) 2013-2014 Sebastian 'tokkee' Harl <sh@tokkee.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#include "sysdb.h"
-#include "core/error.h"
#include "core/store.h"
#include "frontend/connection-private.h"
+#include "parser/ast.h"
+#include "parser/parser.h"
+#include "utils/error.h"
+#include "utils/proto.h"
#include "utils/strbuf.h"
#include <errno.h>
+#include <string.h>
+
+/*
+ * private helper functions
+ */
+
+static int
+list_tojson(sdb_store_obj_t *obj,
+ sdb_store_matcher_t __attribute__((unused)) *filter,
+ void *user_data)
+{
+ sdb_store_json_formatter_t *f = user_data;
+ return sdb_store_json_emit(f, obj);
+} /* list_tojson */
+
+static int
+lookup_tojson(sdb_store_obj_t *obj, sdb_store_matcher_t *filter,
+ void *user_data)
+{
+ sdb_store_json_formatter_t *f = user_data;
+ return sdb_store_json_emit_full(f, obj, filter);
+} /* lookup_tojson */
/*
* public API
*/
+int
+sdb_fe_query(sdb_conn_t *conn)
+{
+ sdb_llist_t *parsetree;
+ sdb_ast_node_t *ast = NULL;
+
+ sdb_store_matcher_t *q;
+ sdb_strbuf_t *buf = NULL;
+ int status = 0;
+
+ if ((! conn) || (conn->cmd != SDB_CONNECTION_QUERY))
+ return -1;
+
+ parsetree = sdb_parser_parse(sdb_strbuf_string(conn->buf),
+ (int)conn->cmd_len, conn->errbuf);
+ if (! parsetree) {
+ char query[conn->cmd_len + 1];
+ strncpy(query, sdb_strbuf_string(conn->buf), conn->cmd_len);
+ query[sizeof(query) - 1] = '\0';
+ sdb_log(SDB_LOG_ERR, "frontend: Failed to parse query '%s': %s",
+ query, sdb_strbuf_string(conn->errbuf));
+ return -1;
+ }
+
+ switch (sdb_llist_len(parsetree)) {
+ case 0:
+ /* skipping empty command; send back an empty reply */
+ sdb_connection_send(conn, SDB_CONNECTION_DATA, 0, NULL);
+ break;
+ case 1:
+ ast = SDB_AST_NODE(sdb_llist_get(parsetree, 0));
+ break;
+
+ default:
+ {
+ char query[conn->cmd_len + 1];
+ strncpy(query, sdb_strbuf_string(conn->buf), conn->cmd_len);
+ query[sizeof(query) - 1] = '\0';
+ sdb_log(SDB_LOG_WARNING, "frontend: Ignoring %zu command%s "
+ "in multi-statement query '%s'",
+ sdb_llist_len(parsetree) - 1,
+ sdb_llist_len(parsetree) == 2 ? "" : "s",
+ query);
+ ast = SDB_AST_NODE(sdb_llist_get(parsetree, 0));
+ }
+ }
+
+ q = sdb_store_query_prepare(ast);
+ if (! q) {
+ /* this shouldn't happen */
+ sdb_strbuf_sprintf(conn->errbuf, "failed to compile AST");
+ sdb_log(SDB_LOG_ERR, "frontend: failed to compile AST");
+ status = -1;
+ } else {
+ buf = sdb_strbuf_create(1024);
+ if (! buf) {
+ sdb_strbuf_sprintf(conn->errbuf, "Out of memory");
+ sdb_object_deref(SDB_OBJ(q));
+ return -1;
+ }
+ status = sdb_store_query_execute(q, buf, conn->errbuf);
+ if (status < 0) {
+ char query[conn->cmd_len + 1];
+ strncpy(query, sdb_strbuf_string(conn->buf), conn->cmd_len);
+ query[sizeof(query) - 1] = '\0';
+ sdb_log(SDB_LOG_ERR, "frontend: failed to execute query '%s'", query);
+ }
+ }
+ sdb_object_deref(SDB_OBJ(ast));
+ sdb_llist_destroy(parsetree);
+
+ if (status < 0) {
+ sdb_object_deref(SDB_OBJ(q));
+ sdb_strbuf_destroy(buf);
+ return status;
+ }
+
+ assert(buf);
+ sdb_connection_send(conn, status,
+ (uint32_t)sdb_strbuf_len(buf), sdb_strbuf_string(buf));
+
+ sdb_strbuf_destroy(buf);
+ sdb_object_deref(SDB_OBJ(q));
+ return 0;
+} /* sdb_fe_query */
+
+int
+sdb_fe_fetch(sdb_conn_t *conn)
+{
+ char name[conn->cmd_len + 1];
+ uint32_t type;
+
+ if ((! conn) || (conn->cmd != SDB_CONNECTION_FETCH))
+ return -1;
+
+ if (conn->cmd_len < sizeof(uint32_t)) {
+ sdb_log(SDB_LOG_ERR, "frontend: Invalid command length %d for "
+ "FETCH command", conn->cmd_len);
+ sdb_strbuf_sprintf(conn->errbuf, "FETCH: Invalid command length %d",
+ conn->cmd_len);
+ return -1;
+ }
+
+ sdb_proto_unmarshal_int32(SDB_STRBUF_STR(conn->buf), &type);
+ strncpy(name, sdb_strbuf_string(conn->buf) + sizeof(uint32_t),
+ conn->cmd_len - sizeof(uint32_t));
+ name[sizeof(name) - 1] = '\0';
+ /* TODO: support other types besides hosts */
+ return sdb_fe_exec_fetch(conn, (int)type, name, NULL, /* filter = */ NULL);
+} /* sdb_fe_fetch */
+
int
sdb_fe_list(sdb_conn_t *conn)
{
+ uint32_t type = SDB_HOST;
+
+ if ((! conn) || (conn->cmd != SDB_CONNECTION_LIST))
+ return -1;
+
+ if (conn->cmd_len == sizeof(uint32_t))
+ sdb_proto_unmarshal_int32(SDB_STRBUF_STR(conn->buf), &type);
+ else if (conn->cmd_len) {
+ sdb_log(SDB_LOG_ERR, "frontend: Invalid command length %d for "
+ "LIST command", conn->cmd_len);
+ sdb_strbuf_sprintf(conn->errbuf, "LIST: Invalid command length %d",
+ conn->cmd_len);
+ return -1;
+ }
+ return sdb_fe_exec_list(conn, (int)type, /* filter = */ NULL);
+} /* sdb_fe_list */
+
+int
+sdb_fe_lookup(sdb_conn_t *conn)
+{
+ sdb_store_matcher_t *m;
+ const char *matcher;
+ size_t matcher_len;
+
+ uint32_t type;
+ int status;
+
+ conn_matcher_t m_node = {
+ { SDB_OBJECT_INIT, SDB_CONNECTION_MATCHER }, NULL
+ };
+ conn_lookup_t node = {
+ { SDB_OBJECT_INIT, SDB_CONNECTION_LOOKUP },
+ -1, &m_node, NULL
+ };
+
+ if ((! conn) || (conn->cmd != SDB_CONNECTION_LOOKUP))
+ return -1;
+
+ if (conn->cmd_len < sizeof(uint32_t)) {
+ sdb_log(SDB_LOG_ERR, "frontend: Invalid command length %d for "
+ "LOOKUP command", conn->cmd_len);
+ sdb_strbuf_sprintf(conn->errbuf, "LOOKUP: Invalid command length %d",
+ conn->cmd_len);
+ return -1;
+ }
+ sdb_proto_unmarshal_int32(SDB_STRBUF_STR(conn->buf), &type);
+
+ matcher = sdb_strbuf_string(conn->buf) + sizeof(uint32_t);
+ matcher_len = conn->cmd_len - sizeof(uint32_t);
+ m = sdb_fe_parse_matcher(matcher, (int)matcher_len, conn->errbuf);
+ if (! m) {
+ char expr[matcher_len + 1];
+ strncpy(expr, matcher, sizeof(expr));
+ expr[sizeof(expr) - 1] = '\0';
+ sdb_log(SDB_LOG_ERR, "frontend: Failed to parse "
+ "lookup condition '%s': %s", expr,
+ sdb_strbuf_string(conn->errbuf));
+ return -1;
+ }
+
+ node.type = (int)type;
+ m_node.matcher = m;
+
+ /* run analyzer separately; parse_matcher is missing
+ * the right context to do so */
+ if (sdb_fe_analyze(SDB_CONN_NODE(&node), conn->errbuf)) {
+ char expr[matcher_len + 1];
+ char err[sdb_strbuf_len(conn->errbuf) + sizeof(expr) + 64];
+ strncpy(expr, matcher, sizeof(expr));
+ expr[sizeof(expr) - 1] = '\0';
+ snprintf(err, sizeof(err), "Failed to parse "
+ "lookup condition '%s': %s", expr,
+ sdb_strbuf_string(conn->errbuf));
+ sdb_strbuf_sprintf(conn->errbuf, "%s", err);
+ status = -1;
+ }
+ else
+ status = sdb_fe_exec_lookup(conn, (int)type, m, /* filter = */ NULL);
+ sdb_object_deref(SDB_OBJ(m));
+ return status;
+} /* sdb_fe_lookup */
+
+/*
+ * TODO: let the functions above build an AST; then drop sdb_fe_exec_*.
+ */
+
+int
+sdb_fe_exec_fetch(sdb_conn_t *conn, int type,
+ const char *hostname, const char *name, sdb_store_matcher_t *filter)
+{
+ uint32_t res_type = htonl(SDB_CONNECTION_FETCH);
+
+ sdb_store_obj_t *host;
+ sdb_store_obj_t *obj;
+
+ sdb_store_json_formatter_t *f;
+ sdb_strbuf_t *buf;
+
+ if ((! hostname) || ((type == SDB_HOST) && name)
+ || ((type != SDB_HOST) && (! name))) {
+ /* This is a programming error, not something the client did wrong */
+ sdb_strbuf_sprintf(conn->errbuf, "INTERNAL ERROR: invalid "
+ "arguments to sdb_fe_exec_fetch(%s, %s, %s)",
+ SDB_STORE_TYPE_TO_NAME(type), hostname, name);
+ return -1;
+ }
+ if (type == SDB_HOST)
+ name = hostname;
+
+ host = sdb_store_get_host(hostname);
+ if ((! host) || (filter
+ && (! sdb_store_matcher_matches(filter, host, NULL)))) {
+ sdb_strbuf_sprintf(conn->errbuf, "Failed to fetch %s %s: "
+ "host %s not found", SDB_STORE_TYPE_TO_NAME(type),
+ name, hostname);
+ sdb_object_deref(SDB_OBJ(host));
+ return -1;
+ }
+ if (type == SDB_HOST) {
+ obj = host;
+ }
+ else {
+ obj = sdb_store_get_child(host, type, name);
+ if ((! obj) || (filter
+ && (! sdb_store_matcher_matches(filter, obj, NULL)))) {
+ sdb_strbuf_sprintf(conn->errbuf, "Failed to fetch %s %s.%s: "
+ "%s not found", SDB_STORE_TYPE_TO_NAME(type),
+ hostname, name, name);
+ if (obj)
+ sdb_object_deref(SDB_OBJ(obj));
+ sdb_object_deref(SDB_OBJ(host));
+ return -1;
+ }
+ sdb_object_deref(SDB_OBJ(host));
+ }
+ host = NULL;
+
+ buf = sdb_strbuf_create(1024);
+ if (! buf) {
+ char errbuf[1024];
+ sdb_log(SDB_LOG_ERR, "frontend: Failed to create "
+ "buffer to handle FETCH command: %s",
+ sdb_strerror(errno, errbuf, sizeof(errbuf)));
+
+ sdb_strbuf_sprintf(conn->errbuf, "Out of memory");
+ sdb_strbuf_destroy(buf);
+ sdb_object_deref(SDB_OBJ(obj));
+ return -1;
+ }
+ f = sdb_store_json_formatter(buf, type, /* flags = */ 0);
+ if (! f) {
+ char errbuf[1024];
+ sdb_log(SDB_LOG_ERR, "frontend: Failed to create "
+ "JSON formatter to handle FETCH command: %s",
+ sdb_strerror(errno, errbuf, sizeof(errbuf)));
+
+ sdb_strbuf_sprintf(conn->errbuf, "Out of memory");
+ sdb_strbuf_destroy(buf);
+ sdb_object_deref(SDB_OBJ(obj));
+ return -1;
+ }
+
+ sdb_strbuf_memcpy(buf, &res_type, sizeof(uint32_t));
+ if (sdb_store_json_emit_full(f, obj, filter)) {
+ sdb_log(SDB_LOG_ERR, "frontend: Failed to serialize "
+ "%s %s.%s to JSON", SDB_STORE_TYPE_TO_NAME(type),
+ hostname, name);
+ sdb_strbuf_sprintf(conn->errbuf, "Out of memory");
+ sdb_strbuf_destroy(buf);
+ free(f);
+ sdb_object_deref(SDB_OBJ(obj));
+ return -1;
+ }
+ sdb_store_json_finish(f);
+
+ sdb_connection_send(conn, SDB_CONNECTION_DATA,
+ (uint32_t)sdb_strbuf_len(buf), sdb_strbuf_string(buf));
+ sdb_strbuf_destroy(buf);
+ free(f);
+ sdb_object_deref(SDB_OBJ(obj));
+ return 0;
+} /* sdb_fe_exec_fetch */
+
+int
+sdb_fe_exec_list(sdb_conn_t *conn, int type, sdb_store_matcher_t *filter)
+{
+ uint32_t res_type = htonl(SDB_CONNECTION_LIST);
+
+ sdb_store_json_formatter_t *f;
sdb_strbuf_t *buf;
buf = sdb_strbuf_create(1024);
sdb_strbuf_destroy(buf);
return -1;
}
+ f = sdb_store_json_formatter(buf, type, SDB_WANT_ARRAY);
+ if (! f) {
+ char errbuf[1024];
+ sdb_log(SDB_LOG_ERR, "frontend: Failed to create "
+ "JSON formatter to handle LIST command: %s",
+ sdb_strerror(errno, errbuf, sizeof(errbuf)));
- if (sdb_store_tojson(buf)) {
+ sdb_strbuf_sprintf(conn->errbuf, "Out of memory");
+ sdb_strbuf_destroy(buf);
+ return -1;
+ }
+
+ sdb_strbuf_memcpy(buf, &res_type, sizeof(uint32_t));
+ if (sdb_store_scan(type, /* m = */ NULL, filter, list_tojson, f)) {
sdb_log(SDB_LOG_ERR, "frontend: Failed to serialize "
"store to JSON");
sdb_strbuf_sprintf(conn->errbuf, "Out of memory");
sdb_strbuf_destroy(buf);
+ free(f);
+ return -1;
+ }
+ sdb_store_json_finish(f);
+
+ sdb_connection_send(conn, SDB_CONNECTION_DATA,
+ (uint32_t)sdb_strbuf_len(buf), sdb_strbuf_string(buf));
+ sdb_strbuf_destroy(buf);
+ free(f);
+ return 0;
+} /* sdb_fe_exec_list */
+
+int
+sdb_fe_exec_lookup(sdb_conn_t *conn, int type,
+ sdb_store_matcher_t *m, sdb_store_matcher_t *filter)
+{
+ uint32_t res_type = htonl(SDB_CONNECTION_LOOKUP);
+
+ sdb_store_json_formatter_t *f;
+ sdb_strbuf_t *buf;
+
+ buf = sdb_strbuf_create(1024);
+ if (! buf) {
+ char errbuf[1024];
+ sdb_log(SDB_LOG_ERR, "frontend: Failed to create "
+ "buffer to handle LOOKUP command: %s",
+ sdb_strerror(errno, errbuf, sizeof(errbuf)));
+
+ sdb_strbuf_sprintf(conn->errbuf, "Out of memory");
+ return -1;
+ }
+ f = sdb_store_json_formatter(buf, type, SDB_WANT_ARRAY);
+ if (! f) {
+ char errbuf[1024];
+ sdb_log(SDB_LOG_ERR, "frontend: Failed to create "
+ "JSON formatter to handle LOOKUP command: %s",
+ sdb_strerror(errno, errbuf, sizeof(errbuf)));
+
+ sdb_strbuf_sprintf(conn->errbuf, "Out of memory");
+ sdb_strbuf_destroy(buf);
+ return -1;
+ }
+
+ sdb_strbuf_memcpy(buf, &res_type, sizeof(uint32_t));
+
+ if (sdb_store_scan(type, m, filter, lookup_tojson, f)) {
+ sdb_log(SDB_LOG_ERR, "frontend: Failed to lookup %ss",
+ SDB_STORE_TYPE_TO_NAME(type));
+ sdb_strbuf_sprintf(conn->errbuf, "Failed to lookup %ss",
+ SDB_STORE_TYPE_TO_NAME(type));
+ sdb_strbuf_destroy(buf);
+ free(f);
+ return -1;
+ }
+ sdb_store_json_finish(f);
+
+ sdb_connection_send(conn, SDB_CONNECTION_DATA,
+ (uint32_t)sdb_strbuf_len(buf), sdb_strbuf_string(buf));
+ sdb_strbuf_destroy(buf);
+ free(f);
+ return 0;
+} /* sdb_fe_exec_lookup */
+
+int
+sdb_fe_exec_timeseries(sdb_conn_t *conn,
+ const char *hostname, const char *metric,
+ sdb_timeseries_opts_t *opts)
+{
+ sdb_strbuf_t *buf;
+ uint32_t res_type = htonl(SDB_CONNECTION_TIMESERIES);
+
+ buf = sdb_strbuf_create(1024);
+ if (! buf) {
+ char errbuf[1024];
+ sdb_log(SDB_LOG_ERR, "frontend: Failed to create "
+ "buffer to handle TIMESERIES command: %s",
+ sdb_strerror(errno, errbuf, sizeof(errbuf)));
+
+ sdb_strbuf_sprintf(conn->errbuf, "Out of memory");
+ return -1;
+ }
+
+ sdb_strbuf_memcpy(buf, &res_type, sizeof(uint32_t));
+ if (sdb_store_fetch_timeseries(hostname, metric, opts, buf)) {
+ sdb_log(SDB_LOG_ERR, "frontend: Failed to fetch time-series");
+ sdb_strbuf_sprintf(conn->errbuf, "Failed to fetch time-series");
+ sdb_strbuf_destroy(buf);
return -1;
}
- sdb_connection_send(conn, CONNECTION_OK,
+ sdb_connection_send(conn, SDB_CONNECTION_DATA,
(uint32_t)sdb_strbuf_len(buf), sdb_strbuf_string(buf));
sdb_strbuf_destroy(buf);
return 0;
-} /* session_start */
+} /* sdb_fe_exec_timeseries */
/* vim: set tw=78 sw=4 ts=4 noexpandtab : */