index bdebe7d1f9f0d3ba70222893ee73b810cec55b7a..16ad39a28a51f5c8be014a89ad0714b410806a5c 100644 (file)
#define SDB_FRONTEND_CONNECTION_H 1
#include "frontend/proto.h"
+#include "core/store.h"
+#include "utils/llist.h"
#include "utils/strbuf.h"
#include <inttypes.h>
typedef struct sdb_conn sdb_conn_t;
+/*
+ * sdb_conn_node_t represents an interface for the result of parsing a command
+ * string. The first field of an actual implementation of the interface is a
+ * sdb_conn_state_t in order to fascilitate casting to and from the interface
+ * type to the implementation type.
+ */
+typedef struct {
+ sdb_object_t super;
+ sdb_conn_state_t cmd;
+} sdb_conn_node_t;
+#define SDB_CONN_NODE(obj) ((sdb_conn_node_t *)(obj))
+
+/*
+ * sdb_connection_enable_logging:
+ * Enable logging of connection-related messages to the current client
+ * connection. After this function has been called all log messages
+ * originating from the thread handling the current client connection will
+ * also be sent to the client.
+ *
+ * Returns:
+ * - 0 on success
+ * - a negative value else
+ */
+int
+sdb_connection_enable_logging(void);
+
/*
* sdb_connection_accpet:
* Accept a new connection on the specified file-descriptor 'fd' and return a
/*
* sdb_fe_parse:
- * Parse the query text specified in 'query'.
+ * Parse the query text specified in 'query' of length 'len' and return a list
+ * of parse trees (for each command) to be executed by sdb_fe_exec. The list
+ * has to be freed by the caller. If 'len' is less than zero, parse the whole
+ * (nul-terminated) string.
+ *
+ * Returns:
+ * - an sdb_llist_t object of sdb_conn_node_t on success
+ * - NULL in case of an error
+ */
+sdb_llist_t *
+sdb_fe_parse(const char *query, int len);
+
+/*
+ * sdb_fe_exec:
+ * Execute the command identified by 'node' on the specified connection.
+ *
+ * Returns:
+ * - 0 on success
+ * - a negative value else
*/
int
-sdb_fe_parse(const char *query);
+sdb_fe_exec(sdb_conn_t *conn, sdb_conn_node_t *node);
/*
* session handling
*/
/*
- * sdb_fe_list:
- * Send a complete listing of the store, serialized as JSON, to the client.
+ * sdb_fe_query, sdb_fe_fetch, sdb_fe_list, sdb_fe_lookup:
+ * Handle the CONNECTION_QUERY, CONNECTION_FETCH, CONNECTION_LIST, and
+ * CONNECTION_LOOKUP commands respectively. It is expected that the current
+ * command has been initialized already.
*
* Returns:
* - 0 on success
* - a negative value else
*/
int
+sdb_fe_query(sdb_conn_t *conn);
+int
+sdb_fe_fetch(sdb_conn_t *conn);
+int
sdb_fe_list(sdb_conn_t *conn);
+int
+sdb_fe_lookup(sdb_conn_t *conn);
+
+/*
+ * sdb_fe_exec_fetch:
+ * Execute the 'FETCH' command. Send the named host, serialized as JSON, to
+ * the client. If specified, only objects matching the filter will be
+ * included. See sdb_store_tojson for details.
+ *
+ * Returns:
+ * - 0 on success
+ * - a negative value else
+ */
+int
+sdb_fe_exec_fetch(sdb_conn_t *conn, const char *name,
+ sdb_store_matcher_t *filter);
+
+/*
+ * sdb_fe_exec_list:
+ * Execute the 'LIST' command. Send a complete listing of the store,
+ * serialized as JSON, to the client. If specified, only objects matching the
+ * filter will be included. See sdb_store_tojson for details.
+ *
+ * Returns:
+ * - 0 on success
+ * - a negative value else
+ */
+int
+sdb_fe_exec_list(sdb_conn_t *conn, sdb_store_matcher_t *filter);
+
+/*
+ * sdb_fe_exec_lookup:
+ * Execute the 'LOOKUP' command. Send a list of hosts matching 'm', serialized
+ * as JSON, to the client. If specified, only objects matching the filter will
+ * be included. See sdb_store_tojson for details.
+ *
+ * Returns:
+ * - 0 on success
+ * - a negative value else
+ */
+int
+sdb_fe_exec_lookup(sdb_conn_t *conn, sdb_store_matcher_t *m,
+ sdb_store_matcher_t *filter);
#ifdef __cplusplus
} /* extern "C" */