*/
#include <stdbool.h>
+#include <stdint.h>
+
+#include <glib.h>
-#include "common/macros.h"
#include <babeltrace2/babeltrace.h>
+#include "common/macros.h"
#include "../common/metadata/decoder.h"
#include "../common/msg-iter/msg-iter.h"
-
#include "viewer-connection.h"
struct lttng_live_component;
* Since only a single iterator per viewer connection, we have
* only a single message iterator per stream.
*/
- struct bt_msg_iter *msg_iter;
+ struct ctf_msg_iter *msg_iter;
uint64_t viewer_stream_id;
/* Owned by this. */
GString *name;
+
+ bool has_stream_hung_up;
};
struct lttng_live_metadata {
bt_logging_level log_level;
bt_self_component *self_comp;
- /* Weak reference. */
- struct lttng_live_trace *trace;
-
uint64_t stream_id;
/* Weak reference. */
struct ctf_metadata_decoder *decoder;
+};
- bool closed;
+enum lttng_live_metadata_stream_state {
+ /*
+ * The metadata needs to be updated. This is either because we just
+ * created the trace and haven't asked yet, or the relay specifically
+ * told us that new metadata is available.
+ */
+ LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED,
+ /*
+ * The metadata was updated and the relay has not told us we need to
+ * update it yet.
+ */
+ LTTNG_LIVE_METADATA_STREAM_STATE_NOT_NEEDED,
+ /*
+ * The relay has closed this metadata stream. We set this in reaction
+ * to a LTTNG_VIEWER_METADATA_ERR reply to a LTTNG_VIEWER_GET_METADATA
+ * command to the relay. If this field is set, we have received all the
+ * metadata that we are ever going to get for that metadata stream.
+ */
+ LTTNG_LIVE_METADATA_STREAM_STATE_CLOSED,
};
struct lttng_live_trace {
/* Owned by this. */
GPtrArray *stream_iterators;
- bool new_metadata_needed;
+ enum lttng_live_metadata_stream_state metadata_stream_state;
};
struct lttng_live_session {
/* Timestamp in nanosecond of the last message sent downstream. */
int64_t last_msg_ts_ns;
+
+ /* True if the iterator was interrupted. */
+ bool was_interrupted;
};
enum lttng_live_iterator_status {
LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED = -4,
};
-bt_component_class_init_method_status lttng_live_component_init(
+bt_component_class_initialize_method_status lttng_live_component_init(
bt_self_component_source *self_comp,
+ bt_self_component_source_configuration *config,
const bt_value *params, void *init_method_data);
bt_component_class_query_method_status lttng_live_query(
bt_self_component_class_source *comp_class,
- const bt_query_executor *query_exec,
+ bt_private_query_executor *priv_query_exec,
const char *object, const bt_value *params,
- bt_logging_level log_level,
- const bt_value **result);
+ void *method_data, const bt_value **result);
void lttng_live_component_finalize(bt_self_component_source *component);
bt_message_array_const msgs, uint64_t capacity,
uint64_t *count);
-bt_component_class_message_iterator_init_method_status lttng_live_msg_iter_init(
+bt_component_class_message_iterator_initialize_method_status lttng_live_msg_iter_init(
bt_self_message_iterator *self_msg_it,
+ bt_self_message_iterator_configuration *config,
bt_self_component_source *self_comp,
bt_self_component_port_output *self_port);
void lttng_live_msg_iter_finalize(bt_self_message_iterator *it);
-int lttng_live_create_viewer_session(struct lttng_live_msg_iter *lttng_live_msg_iter);
-int lttng_live_attach_session(struct lttng_live_session *session);
-int lttng_live_detach_session(struct lttng_live_session *session);
-enum lttng_live_iterator_status lttng_live_get_new_streams(
+enum lttng_live_viewer_status lttng_live_create_viewer_session(
+ struct lttng_live_msg_iter *lttng_live_msg_iter);
+
+enum lttng_live_viewer_status lttng_live_attach_session(
+ struct lttng_live_session *session,
+ bt_self_message_iterator *self_msg_iter);
+
+enum lttng_live_viewer_status lttng_live_detach_session(
struct lttng_live_session *session);
+enum lttng_live_iterator_status lttng_live_get_new_streams(
+ struct lttng_live_session *session,
+ bt_self_message_iterator *self_msg_iter);
+
int lttng_live_add_session(struct lttng_live_msg_iter *lttng_live_msg_iter,
uint64_t session_id,
const char *hostname,
const char *session_name);
-ssize_t lttng_live_get_one_metadata_packet(struct lttng_live_trace *trace,
- FILE *fp);
+/*
+ * lttng_live_get_one_metadata_packet() asks the Relay Daemon for new metadata.
+ * If new metadata is received, the function writes it to the provided file
+ * handle and updates the reply_len output parameter. This function should be
+ * called in loop until _END status is received to ensure all metadata is
+ * written to the file.
+ */
+enum lttng_live_get_one_metadata_status lttng_live_get_one_metadata_packet(
+ struct lttng_live_trace *trace, FILE *fp, size_t *reply_len);
+
enum lttng_live_iterator_status lttng_live_get_next_index(
struct lttng_live_msg_iter *lttng_live_msg_iter,
struct lttng_live_stream_iterator *stream,
struct packet_index *index);
-enum bt_msg_iter_medium_status lttng_live_get_stream_bytes(
+enum ctf_msg_iter_medium_status lttng_live_get_stream_bytes(
struct lttng_live_msg_iter *lttng_live_msg_iter,
struct lttng_live_stream_iterator *stream, uint8_t *buf,
uint64_t offset, uint64_t req_len, uint64_t *recv_len);
struct lttng_live_session *session, uint64_t trace_id);
void lttng_live_need_new_streams(struct lttng_live_msg_iter *lttng_live_msg_iter);
-bool lttng_live_graph_is_canceled(struct lttng_live_component *lttng_live);
+bool lttng_live_graph_is_canceled(struct lttng_live_msg_iter *msg_iter);
#endif /* BABELTRACE_PLUGIN_CTF_LTTNG_LIVE_H */