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diff --git a/src/frontend/query.c b/src/frontend/query.c
index b3bf05e3bc83939d85b5de86faf099df49d392d1..97698fd300be6af87607c13d9b7c2336cea54b48 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
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
#include "sysdb.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>
/*
- * public API
+ * private helper functions
*/
-int
-sdb_fe_list(sdb_conn_t *conn)
+static char *
+sstrdup(const char *s)
+{
+ return s ? strdup(s) : NULL;
+} /* sstrdup */
+
+static int
+query_exec(sdb_conn_t *conn, sdb_ast_node_t *ast)
{
+ sdb_store_query_t *q;
sdb_strbuf_t *buf;
+ int status;
- buf = sdb_strbuf_create(1024);
- if (! buf) {
- char errbuf[1024];
- sdb_log(SDB_LOG_ERR, "frontend: Failed to create "
- "buffer to handle LIST command: %s",
- sdb_strerror(errno, errbuf, sizeof(errbuf)));
+ if (! ast) {
+ sdb_strbuf_sprintf(conn->errbuf, "out of memory");
+ return -1;
+ }
- sdb_strbuf_sprintf(conn->errbuf, "Out of memory");
- sdb_strbuf_destroy(buf);
+ 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");
return -1;
}
- if (sdb_store_tojson(buf)) {
- sdb_log(SDB_LOG_ERR, "frontend: Failed to serialize "
- "store to JSON");
+ buf = sdb_strbuf_create(1024);
+ if (! buf) {
sdb_strbuf_sprintf(conn->errbuf, "Out of memory");
- sdb_strbuf_destroy(buf);
+ 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);
+ }
+ else
+ sdb_connection_send(conn, status,
+ (uint32_t)sdb_strbuf_len(buf), sdb_strbuf_string(buf));
- sdb_connection_send(conn, CONNECTION_OK,
- (uint32_t)sdb_strbuf_len(buf), sdb_strbuf_string(buf));
sdb_strbuf_destroy(buf);
- return 0;
-} /* session_start */
+ sdb_object_deref(SDB_OBJ(q));
+ return status < 0 ? status : 0;
+} /* query_exec */
+
+/*
+ * public API
+ */
+
+int
+sdb_fe_query(sdb_conn_t *conn)
+{
+ sdb_llist_t *parsetree;
+ sdb_ast_node_t *ast = 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));
+ }
+ }
+
+ if (ast) {
+ status = query_exec(conn, ast);
+ sdb_object_deref(SDB_OBJ(ast));
+ }
+ sdb_llist_destroy(parsetree);
+ return status;
+} /* sdb_fe_query */
+
+int
+sdb_fe_fetch(sdb_conn_t *conn)
+{
+ sdb_ast_node_t *ast;
+ char hostname[conn->cmd_len + 1];
+ char name[conn->cmd_len + 1];
+ uint32_t type;
+ int status;
+
+ 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;
+ }
+
+ /* TODO: support other types besides hosts */
+ hostname[0] = '\0';
+
+ 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';
+
+ ast = sdb_ast_fetch_create((int)type,
+ hostname[0] ? strdup(hostname) : NULL,
+ name[0] ? strdup(name) : NULL,
+ /* filter = */ NULL);
+ status = query_exec(conn, ast);
+ sdb_object_deref(SDB_OBJ(ast));
+ return status;
+} /* sdb_fe_fetch */
+
+int
+sdb_fe_list(sdb_conn_t *conn)
+{
+ sdb_ast_node_t *ast;
+ uint32_t type = SDB_HOST;
+ int status;
+
+ 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;
+ }
+
+ ast = sdb_ast_list_create((int)type, /* filter = */ NULL);
+ status = query_exec(conn, ast);
+ sdb_object_deref(SDB_OBJ(ast));
+ return status;
+} /* sdb_fe_list */
+
+int
+sdb_fe_lookup(sdb_conn_t *conn)
+{
+ sdb_ast_node_t *ast, *m;
+ const char *matcher;
+ size_t matcher_len;
+
+ uint32_t type;
+ int status;
+
+ 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_parser_parse_conditional(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;
+ }
+
+ ast = sdb_ast_lookup_create((int)type, m, /* filter = */ NULL);
+ /* run analyzer using the full context */
+ if (ast && sdb_parser_analyze(ast, 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 = query_exec(conn, ast);
+ if (! ast)
+ sdb_object_deref(SDB_OBJ(m));
+ sdb_object_deref(SDB_OBJ(ast));
+ return status;
+} /* sdb_fe_lookup */
+
+int
+sdb_fe_store(sdb_conn_t *conn)
+{
+ sdb_ast_node_t *ast;
+ const char *buf = sdb_strbuf_string(conn->buf);
+ size_t len = conn->cmd_len;
+ uint32_t type;
+ ssize_t n;
+ int status;
+
+ if ((! conn) || (conn->cmd != SDB_CONNECTION_STORE))
+ return -1;
+
+ if ((n = sdb_proto_unmarshal_int32(buf, len, &type)) < 0) {
+ sdb_log(SDB_LOG_ERR, "frontend: Invalid command length %zu for "
+ "STORE command", len);
+ sdb_strbuf_sprintf(conn->errbuf,
+ "STORE: Invalid command length %zu", len);
+ return -1;
+ }
+
+ switch (type) {
+ case SDB_HOST:
+ {
+ sdb_proto_host_t host;
+ if (sdb_proto_unmarshal_host(buf, len, &host) < 0) {
+ sdb_strbuf_sprintf(conn->errbuf,
+ "STORE: Failed to unmarshal host object");
+ return -1;
+ }
+ ast = sdb_ast_store_create(SDB_HOST, /* host */ NULL,
+ /* parent */ 0, NULL, sstrdup(host.name), host.last_update,
+ /* metric store */ NULL, NULL, SDB_DATA_NULL);
+ }
+ break;
+
+ case SDB_SERVICE:
+ {
+ sdb_proto_service_t svc;
+ if (sdb_proto_unmarshal_service(buf, len, &svc) < 0) {
+ sdb_strbuf_sprintf(conn->errbuf,
+ "STORE: Failed to unmarshal service object");
+ return -1;
+ }
+ ast = sdb_ast_store_create(SDB_SERVICE, sstrdup(svc.hostname),
+ /* parent */ 0, NULL, sstrdup(svc.name), svc.last_update,
+ /* metric store */ NULL, NULL, SDB_DATA_NULL);
+ }
+ break;
+
+ case SDB_METRIC:
+ {
+ sdb_proto_metric_t metric;
+ if (sdb_proto_unmarshal_metric(buf, len, &metric) < 0) {
+ sdb_strbuf_sprintf(conn->errbuf,
+ "STORE: Failed to unmarshal metric object");
+ return -1;
+ }
+ ast = sdb_ast_store_create(SDB_METRIC, sstrdup(metric.hostname),
+ /* parent */ 0, NULL, sstrdup(metric.name), metric.last_update,
+ sstrdup(metric.store_type), sstrdup(metric.store_id),
+ SDB_DATA_NULL);
+ }
+ break;
+ }
+
+ if (type & SDB_ATTRIBUTE) {
+ sdb_proto_attribute_t attr;
+ const char *hostname, *parent;
+ int parent_type;
+ if (sdb_proto_unmarshal_attribute(buf, len, &attr) < 0) {
+ sdb_strbuf_sprintf(conn->errbuf,
+ "STORE: Failed to unmarshal attribute object");
+ return -1;
+ }
+ if (attr.parent_type == SDB_HOST) {
+ hostname = attr.parent;
+ parent_type = 0;
+ parent = NULL;
+ }
+ else {
+ hostname = attr.hostname;
+ parent_type = attr.parent_type;
+ parent = attr.parent;
+ }
+ ast = sdb_ast_store_create(SDB_ATTRIBUTE, sstrdup(hostname),
+ parent_type, sstrdup(parent), sstrdup(attr.key),
+ attr.last_update, /* metric store */ NULL, NULL,
+ attr.value);
+ }
+
+ if (! ast) {
+ sdb_log(SDB_LOG_ERR, "frontend: Invalid object type %d for "
+ "STORE COMMAND", type);
+ sdb_strbuf_sprintf(conn->errbuf, "STORE: Invalid object type %d", type);
+ return -1;
+ }
+
+ status = sdb_parser_analyze(ast, conn->errbuf);
+ if (! status)
+ status = query_exec(conn, ast);
+ sdb_object_deref(SDB_OBJ(ast));
+ return status;
+} /* sdb_fe_store */
/* vim: set tw=78 sw=4 ts=4 noexpandtab : */