#define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE"
#include "logging/comp-logging.h"
-#include <glib.h>
#include <inttypes.h>
+#include <stdbool.h>
#include <unistd.h>
+#include <glib.h>
+
#include "common/assert.h"
#include <babeltrace2/babeltrace.h>
#include "compat/compiler.h"
#include <babeltrace2/types.h>
#include "plugins/common/muxing/muxing.h"
+#include "plugins/common/param-validation/param-validation.h"
#include "data-stream.h"
#include "metadata.h"
#define print_dbg(fmt, ...) BT_COMP_LOGD(fmt, ## __VA_ARGS__)
static
-const char *print_live_iterator_status(enum lttng_live_iterator_status status)
+const char *lttng_live_iterator_status_string(
+ enum lttng_live_iterator_status status)
{
switch (status) {
case LTTNG_LIVE_ITERATOR_STATUS_CONTINUE:
case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED:
return "LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED";
default:
- abort();
+ bt_common_abort();
}
}
trace = g_new0(struct lttng_live_trace, 1);
if (!trace) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Failed to allocate live trace");
goto error;
}
trace->log_level = session->log_level;
trace->trace_class = NULL;
trace->trace = NULL;
trace->stream_iterators = g_ptr_array_new_with_free_func(
- (GDestroyNotify) lttng_live_stream_iterator_destroy);
+ (GDestroyNotify) lttng_live_stream_iterator_destroy);
BT_ASSERT(trace->stream_iterators);
trace->new_metadata_needed = true;
g_ptr_array_add(session->traces, trace);
session = g_new0(struct lttng_live_session, 1);
if (!session) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Failed to allocate live session");
goto error;
}
session->self_comp = lttng_live_msg_iter->self_comp;
session->id = session_id;
session->traces = g_ptr_array_new_with_free_func(
- (GDestroyNotify) lttng_live_destroy_trace);
+ (GDestroyNotify) lttng_live_destroy_trace);
BT_ASSERT(session->traces);
session->lttng_live_msg_iter = lttng_live_msg_iter;
session->new_streams_needed = true;
g_ptr_array_add(lttng_live_msg_iter->sessions, session);
goto end;
error:
- BT_COMP_LOGE("Error adding session");
g_free(session);
ret = -1;
end:
BT_COMP_LOGD("Destroy lttng live session");
if (session->id != -1ULL) {
if (lttng_live_detach_session(session)) {
- if (session->lttng_live_msg_iter &&
- !lttng_live_graph_is_canceled(
- session->lttng_live_msg_iter)) {
+ if (!lttng_live_graph_is_canceled(
+ session->lttng_live_msg_iter)) {
/* Old relayd cannot detach sessions. */
BT_COMP_LOGD("Unable to detach lttng live session %" PRIu64,
session->id);
g_ptr_array_free(lttng_live_msg_iter->sessions, TRUE);
}
- BT_OBJECT_PUT_REF_AND_RESET(lttng_live_msg_iter->viewer_connection);
+ if (lttng_live_msg_iter->viewer_connection) {
+ live_viewer_connection_destroy(lttng_live_msg_iter->viewer_connection);
+ }
BT_ASSERT(lttng_live_msg_iter->lttng_live_comp);
BT_ASSERT(lttng_live_msg_iter->lttng_live_comp->has_msg_iter);
case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA:
/* Invalid state. */
BT_COMP_LOGF("Unexpected stream state \"ACTIVE_NO_DATA\"");
- abort();
+ bt_common_abort();
case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA:
/* Invalid state. */
BT_COMP_LOGF("Unexpected stream state \"QUIESCENT_NO_DATA\"");
- abort();
+ bt_common_abort();
case LTTNG_LIVE_STREAM_EOF:
break;
}
{
bt_logging_level log_level = lttng_live_msg_iter->log_level;
bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
- enum lttng_live_iterator_status ret =
- LTTNG_LIVE_ITERATOR_STATUS_OK;
- struct packet_index index;
+ enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK;
enum lttng_live_stream_state orig_state = lttng_live_stream->state;
+ struct packet_index index;
if (lttng_live_stream->trace->new_metadata_needed) {
ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
if (ret != LTTNG_LIVE_ITERATOR_STATUS_OK) {
goto end;
}
- BT_ASSERT(lttng_live_stream->state != LTTNG_LIVE_STREAM_EOF);
+ BT_ASSERT_DBG(lttng_live_stream->state != LTTNG_LIVE_STREAM_EOF);
if (lttng_live_stream->state == LTTNG_LIVE_STREAM_QUIESCENT) {
uint64_t last_inact_ts = lttng_live_stream->last_inactivity_ts,
curr_inact_ts = lttng_live_stream->current_inactivity_ts;
struct lttng_live_msg_iter *lttng_live_msg_iter,
struct lttng_live_session *session)
{
+ bt_logging_level log_level = lttng_live_msg_iter->log_level;
+ bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
enum lttng_live_iterator_status status;
uint64_t trace_idx;
- int ret = 0;
if (!session->attached) {
- ret = lttng_live_attach_session(session);
- if (ret) {
- if (lttng_live_msg_iter && lttng_live_graph_is_canceled(
- lttng_live_msg_iter)) {
+ enum lttng_live_viewer_status attach_status =
+ lttng_live_attach_session(session,
+ lttng_live_msg_iter->self_msg_iter);
+ if (attach_status != LTTNG_LIVE_VIEWER_STATUS_OK) {
+ if (lttng_live_graph_is_canceled(lttng_live_msg_iter)) {
+ /*
+ * Clear any causes appended in
+ * `lttng_live_attach_session()` as we want to
+ * return gracefully since the graph was
+ * cancelled.
+ */
+ bt_current_thread_clear_error();
status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
} else {
status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Error attaching to LTTng live session");
}
goto end;
}
}
- status = lttng_live_get_new_streams(session);
+ status = lttng_live_get_new_streams(session,
+ lttng_live_msg_iter->self_msg_iter);
if (status != LTTNG_LIVE_ITERATOR_STATUS_OK &&
status != LTTNG_LIVE_ITERATOR_STATUS_END) {
goto end;
}
- for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) {
+ trace_idx = 0;
+ while (trace_idx < session->traces->len) {
struct lttng_live_trace *trace =
g_ptr_array_index(session->traces, trace_idx);
status = lttng_live_metadata_update(trace);
- if (status != LTTNG_LIVE_ITERATOR_STATUS_OK &&
- status != LTTNG_LIVE_ITERATOR_STATUS_END) {
+ switch (status) {
+ case LTTNG_LIVE_ITERATOR_STATUS_OK:
+ trace_idx++;
+ break;
+ case LTTNG_LIVE_ITERATOR_STATUS_END:
+ /*
+ * The trace has ended. Remove it of the array an
+ * continue the iteration.
+ * We can remove the trace safely when using the
+ * g_ptr_array_remove_index_fast because it replaces
+ * the element at trace_idx with the array's last
+ * element. trace_idx is not incremented because of
+ * that.
+ */
+ (void) g_ptr_array_remove_index_fast(session->traces,
+ trace_idx);
+ break;
+ default:
goto end;
}
}
- status = lttng_live_lazy_msg_init(session);
+ status = lttng_live_lazy_msg_init(session,
+ lttng_live_msg_iter->self_msg_iter);
end:
return status;
lttng_live_iterator_handle_new_streams_and_metadata(
struct lttng_live_msg_iter *lttng_live_msg_iter)
{
- enum lttng_live_iterator_status ret =
- LTTNG_LIVE_ITERATOR_STATUS_OK;
+ enum lttng_live_iterator_status status;
+ enum lttng_live_viewer_status viewer_status;
+ bt_logging_level log_level = lttng_live_msg_iter->log_level;
+ bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
uint64_t session_idx = 0, nr_sessions_opened = 0;
struct lttng_live_session *session;
enum session_not_found_action sess_not_found_act =
*/
if (lttng_live_msg_iter->sessions->len == 0) {
if (sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE) {
- ret = LTTNG_LIVE_ITERATOR_STATUS_END;
+ status = LTTNG_LIVE_ITERATOR_STATUS_END;
goto end;
} else {
/*
* Retry to create a viewer session for the requested
* session name.
*/
- if (lttng_live_create_viewer_session(lttng_live_msg_iter)) {
- ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
+ viewer_status = lttng_live_create_viewer_session(lttng_live_msg_iter);
+ if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) {
+ if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) {
+ status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Error creating LTTng live viewer session");
+ } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) {
+ status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
+ } else {
+ bt_common_abort();
+ }
goto end;
}
}
session_idx++) {
session = g_ptr_array_index(lttng_live_msg_iter->sessions,
session_idx);
- ret = lttng_live_get_session(lttng_live_msg_iter, session);
- switch (ret) {
+ status = lttng_live_get_session(lttng_live_msg_iter, session);
+ switch (status) {
case LTTNG_LIVE_ITERATOR_STATUS_OK:
break;
case LTTNG_LIVE_ITERATOR_STATUS_END:
- ret = LTTNG_LIVE_ITERATOR_STATUS_OK;
+ status = LTTNG_LIVE_ITERATOR_STATUS_OK;
break;
default:
goto end;
nr_sessions_opened++;
}
}
-end:
- if (ret == LTTNG_LIVE_ITERATOR_STATUS_OK &&
- sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE &&
+
+ if (sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE &&
nr_sessions_opened == 0) {
- ret = LTTNG_LIVE_ITERATOR_STATUS_END;
+ status = LTTNG_LIVE_ITERATOR_STATUS_END;
+ } else {
+ status = LTTNG_LIVE_ITERATOR_STATUS_OK;
}
- return ret;
+
+end:
+ return status;
}
static
struct lttng_live_stream_iterator *stream_iter,
bt_message **message, uint64_t timestamp)
{
- enum lttng_live_iterator_status ret =
- LTTNG_LIVE_ITERATOR_STATUS_OK;
+ enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK;
+ bt_logging_level log_level = lttng_live_msg_iter->log_level;
+ bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
bt_message *msg = NULL;
BT_ASSERT(stream_iter->trace->clock_class);
msg = bt_message_message_iterator_inactivity_create(
- lttng_live_msg_iter->self_msg_iter,
- stream_iter->trace->clock_class,
- timestamp);
+ lttng_live_msg_iter->self_msg_iter,
+ stream_iter->trace->clock_class, timestamp);
if (!msg) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Error emitting message iterator inactivity message");
goto error;
}
struct lttng_live_stream_iterator *lttng_live_stream,
bt_message **message)
{
- enum lttng_live_iterator_status ret =
- LTTNG_LIVE_ITERATOR_STATUS_OK;
+ enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK;
if (lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT) {
return LTTNG_LIVE_ITERATOR_STATUS_OK;
}
ret = emit_inactivity_message(lttng_live_msg_iter, lttng_live_stream,
- message, lttng_live_stream->current_inactivity_ts);
+ message, lttng_live_stream->current_inactivity_ts);
lttng_live_stream->last_inactivity_ts =
- lttng_live_stream->current_inactivity_ts;
+ lttng_live_stream->current_inactivity_ts;
end:
return ret;
}
bt_logging_level log_level = lttng_live_msg_iter->log_level;
bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
- BT_ASSERT(msg);
- BT_ASSERT(ts_ns);
+ BT_ASSERT_DBG(msg);
+ BT_ASSERT_DBG(ts_ns);
BT_COMP_LOGD("Getting message's timestamp: iter-data-addr=%p, msg-addr=%p, "
"last-msg-ts=%" PRId64, lttng_live_msg_iter, msg,
switch (bt_message_get_type(msg)) {
case BT_MESSAGE_TYPE_EVENT:
- clock_class =
- bt_message_event_borrow_stream_class_default_clock_class_const(
+ clock_class = bt_message_event_borrow_stream_class_default_clock_class_const(
msg);
- BT_ASSERT(clock_class);
+ BT_ASSERT_DBG(clock_class);
clock_snapshot = bt_message_event_borrow_default_clock_snapshot_const(
msg);
break;
case BT_MESSAGE_TYPE_PACKET_BEGINNING:
- clock_class =
- bt_message_packet_beginning_borrow_stream_class_default_clock_class_const(
+ clock_class = bt_message_packet_beginning_borrow_stream_class_default_clock_class_const(
msg);
BT_ASSERT(clock_class);
msg);
break;
case BT_MESSAGE_TYPE_PACKET_END:
- clock_class =
- bt_message_packet_end_borrow_stream_class_default_clock_class_const(
+ clock_class = bt_message_packet_end_borrow_stream_class_default_clock_class_const(
msg);
BT_ASSERT(clock_class);
msg);
break;
case BT_MESSAGE_TYPE_DISCARDED_EVENTS:
- clock_class =
- bt_message_discarded_events_borrow_stream_class_default_clock_class_const(
+ clock_class = bt_message_discarded_events_borrow_stream_class_default_clock_class_const(
msg);
BT_ASSERT(clock_class);
msg);
break;
case BT_MESSAGE_TYPE_DISCARDED_PACKETS:
- clock_class =
- bt_message_discarded_packets_borrow_stream_class_default_clock_class_const(
+ clock_class = bt_message_discarded_packets_borrow_stream_class_default_clock_class_const(
msg);
BT_ASSERT(clock_class);
msg);
break;
case BT_MESSAGE_TYPE_MESSAGE_ITERATOR_INACTIVITY:
- clock_snapshot =
- bt_message_message_iterator_inactivity_borrow_default_clock_snapshot_const(
- msg);
+ clock_snapshot = bt_message_message_iterator_inactivity_borrow_default_clock_snapshot_const(
+ msg);
break;
default:
/* All the other messages have a higher priority */
}
clock_class = bt_clock_snapshot_borrow_clock_class_const(clock_snapshot);
- BT_ASSERT(clock_class);
+ BT_ASSERT_DBG(clock_class);
ret = bt_clock_snapshot_get_ns_from_origin(clock_snapshot, ts_ns);
if (ret) {
- BT_COMP_LOGE("Cannot get nanoseconds from Epoch of clock snapshot: "
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Cannot get nanoseconds from Epoch of clock snapshot: "
"clock-snapshot-addr=%p", clock_snapshot);
goto error;
}
bt_message **message)
{
enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK;
- enum bt_msg_iter_status status;
- uint64_t session_idx, trace_idx;
bt_logging_level log_level = lttng_live_msg_iter->log_level;
bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
+ enum ctf_msg_iter_status status;
+ uint64_t session_idx, trace_idx;
for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len;
session_idx++) {
goto end;
}
- status = bt_msg_iter_get_next_message(lttng_live_stream->msg_iter,
- lttng_live_msg_iter->self_msg_iter, message);
+ status = ctf_msg_iter_get_next_message(
+ lttng_live_stream->msg_iter, message);
switch (status) {
- case BT_MSG_ITER_STATUS_EOF:
+ case CTF_MSG_ITER_STATUS_EOF:
ret = LTTNG_LIVE_ITERATOR_STATUS_END;
break;
- case BT_MSG_ITER_STATUS_OK:
+ case CTF_MSG_ITER_STATUS_OK:
ret = LTTNG_LIVE_ITERATOR_STATUS_OK;
break;
- case BT_MSG_ITER_STATUS_AGAIN:
+ case CTF_MSG_ITER_STATUS_AGAIN:
/*
* Continue immediately (end of packet). The next
* get_index may return AGAIN to delay the following
*/
ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
break;
- case BT_MSG_ITER_STATUS_INVAL:
+ case CTF_MSG_ITER_STATUS_INVAL:
/* No argument provided by the user, so don't return INVAL. */
- case BT_MSG_ITER_STATUS_ERROR:
+ case CTF_MSG_ITER_STATUS_ERROR:
default:
ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
- BT_COMP_LOGW("CTF msg iterator return an error or failed msg_iter=%p",
- lttng_live_stream->msg_iter);
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "CTF message iterator return an error or failed: "
+ "msg_iter=%p", lttng_live_stream->msg_iter);
break;
}
{
enum lttng_live_iterator_status live_status =
LTTNG_LIVE_ITERATOR_STATUS_OK;
+ bt_logging_level log_level = lttng_live_msg_iter->log_level;
+ bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
/*
* The viewer has hung up on us so we are closing the stream. The
- * `bt_msg_iter` should simply realize that it needs to close the
+ * `ctf_msg_iter` should simply realize that it needs to close the
* stream properly by emitting the necessary stream end message.
*/
- enum bt_msg_iter_status status =
- bt_msg_iter_get_next_message(stream_iter->msg_iter,
- lttng_live_msg_iter->self_msg_iter, curr_msg);
+ enum ctf_msg_iter_status status = ctf_msg_iter_get_next_message(
+ stream_iter->msg_iter, curr_msg);
- if (status == BT_MSG_ITER_STATUS_ERROR) {
+ if (status == CTF_MSG_ITER_STATUS_ERROR) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Error getting the next message from CTF message iterator");
live_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
goto end;
}
- BT_ASSERT(status == BT_MSG_ITER_STATUS_OK);
+ BT_ASSERT(status == CTF_MSG_ITER_STATUS_OK);
end:
return live_status;
retry:
print_stream_state(stream_iter);
live_status = lttng_live_iterator_handle_new_streams_and_metadata(
- lttng_live_msg_iter);
+ lttng_live_msg_iter);
if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
goto end;
}
live_status = lttng_live_iterator_next_handle_one_no_data_stream(
- lttng_live_msg_iter, stream_iter);
+ lttng_live_msg_iter, stream_iter);
if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
if (live_status == LTTNG_LIVE_ITERATOR_STATUS_END) {
goto end;
}
live_status = lttng_live_iterator_next_handle_one_quiescent_stream(
- lttng_live_msg_iter, stream_iter, curr_msg);
+ lttng_live_msg_iter, stream_iter, curr_msg);
if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
BT_ASSERT(!*curr_msg);
goto end;
goto end;
}
live_status = lttng_live_iterator_next_handle_one_active_data_stream(
- lttng_live_msg_iter, stream_iter, curr_msg);
+ lttng_live_msg_iter, stream_iter, curr_msg);
if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
BT_ASSERT(!*curr_msg);
}
struct lttng_live_stream_iterator **youngest_trace_stream_iter)
{
struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL;
+ bt_logging_level log_level = lttng_live_msg_iter->log_level;
+ bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
enum lttng_live_iterator_status stream_iter_status;;
int64_t youngest_candidate_msg_ts = INT64_MAX;
uint64_t stream_iter_idx;
- bt_logging_level log_level = lttng_live_msg_iter->log_level;
- bt_self_component *self_comp = lttng_live_msg_iter->self_comp;
- BT_ASSERT(live_trace);
- BT_ASSERT(live_trace->stream_iterators);
+ BT_ASSERT_DBG(live_trace);
+ BT_ASSERT_DBG(live_trace->stream_iterators);
/*
* Update the current message of every stream iterators of this trace.
* The current msg of every stream must have a timestamp equal or
bool stream_iter_is_ended = false;
struct lttng_live_stream_iterator *stream_iter =
g_ptr_array_index(live_trace->stream_iterators,
- stream_iter_idx);
-
- /*
- * Since we may remove elements from the GPtrArray as we
- * iterate over it, it's possible to see the same element more
- * than once.
- */
- if (stream_iter == youngest_candidate_stream_iter) {
- stream_iter_idx++;
- continue;
- }
+ stream_iter_idx);
/*
* Find if there is are now current message for this stream
bt_message *msg = NULL;
int64_t curr_msg_ts_ns = INT64_MAX;
stream_iter_status = lttng_live_iterator_next_msg_on_stream(
- lttng_live_msg_iter, stream_iter, &msg);
+ lttng_live_msg_iter, stream_iter, &msg);
BT_COMP_LOGD("live stream iterator returned status :%s",
- print_live_iterator_status(stream_iter_status));
+ lttng_live_iterator_status_string(stream_iter_status));
if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) {
stream_iter_is_ended = true;
break;
goto end;
}
- BT_ASSERT(msg);
+ BT_ASSERT_DBG(msg);
/*
* Get the timestamp in nanoseconds from origin of this
* We received a message in the past. To ensure
* monotonicity, we can't send it forward.
*/
- BT_COMP_LOGE("Message's timestamp is less than "
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Message's timestamp is less than "
"lttng-live's message iterator's last "
"returned timestamp: "
"lttng-live-msg-iter-addr=%p, ts=%" PRId64 ", "
}
}
- BT_ASSERT(stream_iter != youngest_candidate_stream_iter);
+ BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter);
if (!stream_iter_is_ended) {
if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) ||
* Order the messages in an arbitrary but
* deterministic way.
*/
- BT_ASSERT(stream_iter != youngest_candidate_stream_iter);
+ BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter);
int ret = common_muxing_compare_messages(
stream_iter->current_msg,
youngest_candidate_stream_iter->current_msg);
stream_iter_idx++;
} else {
/*
- * The live stream iterator is ENDed. We remove that
- * iterator from the list and we restart the iteration
- * at the beginning of the live stream iterator array
- * to because the removal will shuffle the array.
+ * The live stream iterator has ended. That
+ * iterator is removed from the array, but
+ * there is no need to increment
+ * stream_iter_idx as
+ * g_ptr_array_remove_index_fast replaces the
+ * removed element with the array's last
+ * element.
*/
- g_ptr_array_remove_index_fast(live_trace->stream_iterators,
+ g_ptr_array_remove_index_fast(
+ live_trace->stream_iterators,
stream_iter_idx);
- stream_iter_idx = 0;
}
}
goto end;
}
- BT_ASSERT(session->traces);
+ BT_ASSERT_DBG(session->traces);
- /*
- * Use while loops here rather then for loops so we can restart the
- * iteration if an element is removed from the array during the
- * looping.
- */
while (trace_idx < session->traces->len) {
bool trace_is_ended = false;
struct lttng_live_stream_iterator *stream_iter;
}
if (!trace_is_ended) {
- BT_ASSERT(stream_iter);
+ BT_ASSERT_DBG(stream_iter);
if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) ||
stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) {
}
trace_idx++;
} else {
- g_ptr_array_remove_index_fast(session->traces, trace_idx);
- trace_idx = 0;
+ /*
+ * trace_idx is not incremented since
+ * g_ptr_array_remove_index_fast replaces the
+ * element at trace_idx with the array's last element.
+ */
+ g_ptr_array_remove_index_fast(session->traces,
+ trace_idx);
}
}
if (youngest_candidate_stream_iter) {
uint64_t *count)
{
bt_component_class_message_iterator_next_method_status status;
+ enum lttng_live_viewer_status viewer_status;
struct lttng_live_msg_iter *lttng_live_msg_iter =
bt_self_message_iterator_get_data(self_msg_it);
struct lttng_live_component *lttng_live =
*count = 0;
- BT_ASSERT(lttng_live_msg_iter);
+ BT_ASSERT_DBG(lttng_live_msg_iter);
+
+ if (G_UNLIKELY(lttng_live_msg_iter->was_interrupted)) {
+ /*
+ * The iterator was interrupted in a previous call to the
+ * `_next()` method. We currently do not support generating
+ * messages after such event. The babeltrace2 CLI should never
+ * be running the graph after being interrupted. So this check
+ * is to prevent other graph users from using this live
+ * iterator in an messed up internal state.
+ */
+ status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR;
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Message iterator was interrupted during a previous call to the `next()` and currently does not support continuing after such event.");
+ goto end;
+ }
/*
* Clear all the invalid message reference that might be left over in
if (lttng_live->params.sess_not_found_act !=
SESSION_NOT_FOUND_ACTION_CONTINUE) {
status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_END;
- goto no_session;
+ goto end;
} else {
/*
* The are no more active session for this session
* name. Retry to create a viewer session for the
* requested session name.
*/
- if (lttng_live_create_viewer_session(lttng_live_msg_iter)) {
- status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR;
- goto no_session;
+ viewer_status = lttng_live_create_viewer_session(lttng_live_msg_iter);
+ if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) {
+ if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) {
+ status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR;
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Error creating LTTng live viewer session");
+ } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) {
+ status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_AGAIN;
+ } else {
+ bt_common_abort();
+ }
+ goto end;
}
}
}
*candidate_stream_iter = NULL;
int64_t youngest_msg_ts_ns = INT64_MAX;
- BT_ASSERT(lttng_live_msg_iter->sessions);
+ BT_ASSERT_DBG(lttng_live_msg_iter->sessions);
session_idx = 0;
- /*
- * Use a while loop instead of a for loop so we can restart the
- * iteration if we remove an element. We can safely call
- * next_stream_iterator_for_session() multiple times on the
- * same session as we only fetch a new message if there is no
- * current next message for each live stream iterator.
- * If all live stream iterator of that session already have a
- * current next message, the function will simply exit return
- * the same candidate live stream iterator every time.
- */
while (session_idx < lttng_live_msg_iter->sessions->len) {
struct lttng_live_session *session =
g_ptr_array_index(lttng_live_msg_iter->sessions,
if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) {
if (session->closed && session->traces->len == 0) {
/*
- * Remove the session from the list and restart the
- * iteration at the beginning of the array since the
- * removal shuffle the elements of the array.
+ * Remove the session from the list.
+ * session_idx is not modified since
+ * g_ptr_array_remove_index_fast
+ * replaces the the removed element with
+ * the array's last element.
*/
g_ptr_array_remove_index_fast(
lttng_live_msg_iter->sessions,
session_idx);
- session_idx = 0;
} else {
session_idx++;
}
}
if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) {
- goto end;
+ goto return_status;
}
if (G_UNLIKELY(youngest_stream_iter == NULL) ||
if (!youngest_stream_iter) {
stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
- goto end;
+ goto return_status;
}
- BT_ASSERT(youngest_stream_iter->current_msg);
+ BT_ASSERT_DBG(youngest_stream_iter->current_msg);
/* Ensure monotonicity. */
- BT_ASSERT(lttng_live_msg_iter->last_msg_ts_ns <=
+ BT_ASSERT_DBG(lttng_live_msg_iter->last_msg_ts_ns <=
youngest_stream_iter->current_msg_ts_ns);
/*
stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK;
}
-end:
+
+return_status:
switch (stream_iter_status) {
case LTTNG_LIVE_ITERATOR_STATUS_OK:
case LTTNG_LIVE_ITERATOR_STATUS_AGAIN:
+ /*
+ * If we gathered messages, return _OK even if the graph was
+ * interrupted. This allows for the components downstream to at
+ * least get the thoses messages. If the graph was indeed
+ * interrupted there should not be another _next() call as the
+ * application will tear down the graph. This component class
+ * doesn't support restarting after an interruption.
+ */
if (*count > 0) {
- /*
- * We received a again status but we have some messages
- * to send downstream. We send them and return OK for
- * now. On the next call we return again if there are
- * still no new message to send.
- */
status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_OK;
} else {
status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_AGAIN;
status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_END;
break;
case LTTNG_LIVE_ITERATOR_STATUS_NOMEM:
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Memory error preparing the next batch of messages: "
+ "live-iter-status=%s",
+ lttng_live_iterator_status_string(stream_iter_status));
status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_MEMORY_ERROR;
break;
case LTTNG_LIVE_ITERATOR_STATUS_ERROR:
case LTTNG_LIVE_ITERATOR_STATUS_INVAL:
case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED:
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Error preparing the next batch of messages: "
+ "live-iter-status=%s",
+ lttng_live_iterator_status_string(stream_iter_status));
+
status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR;
/* Put all existing messages on error. */
put_messages(msgs, *count);
break;
default:
- abort();
+ bt_common_abort();
}
-no_session:
+end:
return status;
}
+static
+struct lttng_live_msg_iter *lttng_live_msg_iter_create(
+ struct lttng_live_component *lttng_live_comp,
+ bt_self_message_iterator *self_msg_it)
+{
+ bt_self_component *self_comp = lttng_live_comp->self_comp;
+ bt_logging_level log_level = lttng_live_comp->log_level;
+
+ struct lttng_live_msg_iter *lttng_live_msg_iter =
+ g_new0(struct lttng_live_msg_iter, 1);
+ if (!lttng_live_msg_iter) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Failed to allocate lttng_live_msg_iter");
+ goto end;
+ }
+
+ lttng_live_msg_iter->log_level = lttng_live_comp->log_level;
+ lttng_live_msg_iter->self_comp = lttng_live_comp->self_comp;
+ lttng_live_msg_iter->lttng_live_comp = lttng_live_comp;
+ lttng_live_msg_iter->self_msg_iter = self_msg_it;
+
+ lttng_live_msg_iter->active_stream_iter = 0;
+ lttng_live_msg_iter->last_msg_ts_ns = INT64_MIN;
+ lttng_live_msg_iter->was_interrupted = false;
+
+ lttng_live_msg_iter->sessions = g_ptr_array_new_with_free_func(
+ (GDestroyNotify) lttng_live_destroy_session);
+ BT_ASSERT(lttng_live_msg_iter->sessions);
+
+end:
+ return lttng_live_msg_iter;
+
+}
+
BT_HIDDEN
bt_component_class_message_iterator_initialize_method_status lttng_live_msg_iter_init(
bt_self_message_iterator *self_msg_it,
bt_self_component_source *self_comp_src,
bt_self_component_port_output *self_port)
{
- bt_component_class_message_iterator_initialize_method_status ret =
- BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_OK;
+ bt_component_class_message_iterator_initialize_method_status status;
bt_self_component *self_comp =
bt_self_component_source_as_self_component(self_comp_src);
struct lttng_live_component *lttng_live;
struct lttng_live_msg_iter *lttng_live_msg_iter;
+ enum lttng_live_viewer_status viewer_status;
bt_logging_level log_level;
BT_ASSERT(self_msg_it);
log_level = lttng_live->log_level;
self_comp = lttng_live->self_comp;
+
/* There can be only one downstream iterator at the same time. */
BT_ASSERT(!lttng_live->has_msg_iter);
lttng_live->has_msg_iter = true;
- lttng_live_msg_iter = g_new0(struct lttng_live_msg_iter, 1);
+ lttng_live_msg_iter = lttng_live_msg_iter_create(lttng_live,
+ self_msg_it);
if (!lttng_live_msg_iter) {
- ret = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_ERROR;
- goto end;
+ status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_MEMORY_ERROR;
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Failed to create lttng_live_msg_iter");
+ goto error;
}
- lttng_live_msg_iter->log_level = lttng_live->log_level;
- lttng_live_msg_iter->self_comp = lttng_live->self_comp;
- lttng_live_msg_iter->lttng_live_comp = lttng_live;
- lttng_live_msg_iter->self_msg_iter = self_msg_it;
-
- lttng_live_msg_iter->active_stream_iter = 0;
- lttng_live_msg_iter->last_msg_ts_ns = INT64_MIN;
- lttng_live_msg_iter->sessions = g_ptr_array_new_with_free_func(
- (GDestroyNotify) lttng_live_destroy_session);
- BT_ASSERT(lttng_live_msg_iter->sessions);
-
- lttng_live_msg_iter->viewer_connection =
- live_viewer_connection_create(lttng_live->params.url->str, false,
- lttng_live_msg_iter, log_level);
- if (!lttng_live_msg_iter->viewer_connection) {
+ viewer_status = live_viewer_connection_create(self_comp, NULL,
+ log_level, lttng_live->params.url->str, false,
+ lttng_live_msg_iter, <tng_live_msg_iter->viewer_connection);
+ if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) {
+ if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Failed to create viewer connection");
+ } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) {
+ /*
+ * Interruption in the _iter_init() method is not
+ * supported. Return an error.
+ */
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Interrupted while creating viewer connection");
+ }
goto error;
}
- if (lttng_live_create_viewer_session(lttng_live_msg_iter)) {
+ viewer_status = lttng_live_create_viewer_session(lttng_live_msg_iter);
+ if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) {
+ if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Failed to create viewer session");
+ } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) {
+ /*
+ * Interruption in the _iter_init() method is not
+ * supported. Return an error.
+ */
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Interrupted when creating viewer session");
+ }
goto error;
}
+
if (lttng_live_msg_iter->sessions->len == 0) {
switch (lttng_live->params.sess_not_found_act) {
case SESSION_NOT_FOUND_ACTION_CONTINUE:
- BT_COMP_LOGI("Unable to connect to the requested live viewer "
- "session. Keep trying to connect because of "
+ BT_COMP_LOGI("Unable to connect to the requested live viewer session. Keep trying to connect because of "
"%s=\"%s\" component parameter: url=\"%s\"",
SESS_NOT_FOUND_ACTION_PARAM,
SESS_NOT_FOUND_ACTION_CONTINUE_STR,
lttng_live->params.url->str);
break;
case SESSION_NOT_FOUND_ACTION_FAIL:
- BT_COMP_LOGE("Unable to connect to the requested live viewer "
- "session. Fail the message iterator"
- "initialization because of %s=\"%s\" "
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp,
+ "Unable to connect to the requested live viewer session. Fail the message iterator initialization because of %s=\"%s\" "
"component parameter: url =\"%s\"",
SESS_NOT_FOUND_ACTION_PARAM,
SESS_NOT_FOUND_ACTION_FAIL_STR,
lttng_live->params.url->str);
goto error;
case SESSION_NOT_FOUND_ACTION_END:
- BT_COMP_LOGI("Unable to connect to the requested live viewer "
- "session. End gracefully at the first _next() "
+ BT_COMP_LOGI("Unable to connect to the requested live viewer session. End gracefully at the first _next() "
"call because of %s=\"%s\" component parameter: "
"url=\"%s\"", SESS_NOT_FOUND_ACTION_PARAM,
SESS_NOT_FOUND_ACTION_END_STR,
lttng_live->params.url->str);
break;
- case SESSION_NOT_FOUND_ACTION_UNKNOWN:
default:
- /* Fallthrough */
- BT_COMP_LOGE("Unknown action for session not found"
- "error. Fail the message iterator"
- "initialization because of %s=\"%s\" "
- "component parameter: url =\"%s\"",
- SESS_NOT_FOUND_ACTION_PARAM,
- SESS_NOT_FOUND_ACTION_FAIL_STR,
- lttng_live->params.url->str);
- break;
+ bt_common_abort();
}
}
bt_self_message_iterator_set_data(self_msg_it, lttng_live_msg_iter);
-
+ status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_OK;
goto end;
+
error:
- ret = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_ERROR;
+ status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_ERROR;
lttng_live_msg_iter_destroy(lttng_live_msg_iter);
end:
- return ret;
+ return status;
}
+static struct bt_param_validation_map_value_entry_descr list_sessions_params[] = {
+ { URL_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY, { .type = BT_VALUE_TYPE_STRING } },
+ BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END
+};
+
static
bt_component_class_query_method_status lttng_live_query_list_sessions(
const bt_value *params, const bt_value **result,
+ bt_self_component_class *self_comp_class,
bt_logging_level log_level)
{
- bt_component_class_query_method_status status =
- BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK;
+ bt_component_class_query_method_status status;
const bt_value *url_value = NULL;
const char *url;
struct live_viewer_connection *viewer_connection = NULL;
- bt_self_component *self_comp = NULL;
+ enum lttng_live_viewer_status viewer_status;
+ enum bt_param_validation_status validation_status;
+ gchar *validate_error = NULL;
- url_value = bt_value_map_borrow_entry_value_const(params, URL_PARAM);
- if (!url_value) {
- BT_COMP_LOGE("Mandatory `%s` parameter missing", URL_PARAM);
- status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR;
+ validation_status = bt_param_validation_validate(params,
+ list_sessions_params, &validate_error);
+ if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) {
+ status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR;
goto error;
- }
-
- if (!bt_value_is_string(url_value)) {
- BT_COMP_LOGE("`%s` parameter is required to be a string value",
- URL_PARAM);
+ } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) {
status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR;
+ BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, "%s",
+ validate_error);
goto error;
}
+ url_value = bt_value_map_borrow_entry_value_const(params, URL_PARAM);
url = bt_value_string_get(url_value);
- viewer_connection = live_viewer_connection_create(url, true, NULL,
- log_level);
- if (!viewer_connection) {
+ viewer_status = live_viewer_connection_create(NULL, self_comp_class,
+ log_level, url, true, NULL, &viewer_connection);
+ if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) {
+ if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) {
+ BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class,
+ "Failed to create viewer connection");
+ status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR;
+ } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) {
+ status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN;
+ } else {
+ bt_common_abort();
+ }
goto error;
}
status = live_viewer_connection_list_sessions(viewer_connection,
- result);
+ result);
if (status != BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK) {
+ BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class,
+ "Failed to list viewer sessions");
goto error;
}
if (viewer_connection) {
live_viewer_connection_destroy(viewer_connection);
}
+
+ g_free(validate_error);
+
return status;
}
static
bt_component_class_query_method_status lttng_live_query_support_info(
const bt_value *params, const bt_value **result,
+ bt_self_component_class *self_comp_class,
bt_logging_level log_level)
{
bt_component_class_query_method_status status =
input_type_value = bt_value_map_borrow_entry_value_const(params,
"type");
if (!input_type_value) {
- BT_COMP_LOGE("Missing expected `type` parameter.");
+ BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class,
+ "Missing expected `type` parameter.");
goto error;
}
if (!bt_value_is_string(input_type_value)) {
- BT_COMP_LOGE("`type` parameter is not a string value.");
+ BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class,
+ "`type` parameter is not a string value.");
goto error;
}
input_value = bt_value_map_borrow_entry_value_const(params, "input");
if (!input_value) {
- BT_COMP_LOGE("Missing expected `input` parameter.");
+ BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class,
+ "Missing expected `input` parameter.");
goto error;
}
if (!bt_value_is_string(input_value)) {
- BT_COMP_LOGE("`input` parameter is not a string value.");
+ BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class,
+ "`input` parameter is not a string value.");
goto error;
}
bt_component_class_query_method_status status =
BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK;
bt_self_component *self_comp = NULL;
+ bt_self_component_class *self_comp_class =
+ bt_self_component_class_source_as_self_component_class(comp_class);
bt_logging_level log_level = bt_query_executor_get_logging_level(
bt_private_query_executor_as_query_executor_const(
priv_query_exec));
if (strcmp(object, "sessions") == 0) {
status = lttng_live_query_list_sessions(params, result,
- log_level);
+ self_comp_class, log_level);
} else if (strcmp(object, "babeltrace.support-info") == 0) {
status = lttng_live_query_support_info(params, result,
- log_level);
+ self_comp_class, log_level);
} else {
BT_COMP_LOGI("Unknown query object `%s`", object);
status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_UNKNOWN_OBJECT;
void lttng_live_component_finalize(bt_self_component_source *component)
{
void *data = bt_self_component_get_data(
- bt_self_component_source_as_self_component(component));
+ bt_self_component_source_as_self_component(component));
if (!data) {
return;
const bt_value *no_session_param)
{
enum session_not_found_action action;
- const char *no_session_act_str;
- no_session_act_str = bt_value_string_get(no_session_param);
+ const char *no_session_act_str = bt_value_string_get(no_session_param);
+
if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_CONTINUE_STR) == 0) {
action = SESSION_NOT_FOUND_ACTION_CONTINUE;
} else if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_FAIL_STR) == 0) {
action = SESSION_NOT_FOUND_ACTION_FAIL;
- } else if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_END_STR) == 0) {
- action = SESSION_NOT_FOUND_ACTION_END;
} else {
- action = SESSION_NOT_FOUND_ACTION_UNKNOWN;
+ BT_ASSERT(strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_END_STR) == 0);
+ action = SESSION_NOT_FOUND_ACTION_END;
}
return action;
}
+static struct bt_param_validation_value_descr inputs_elem_descr = {
+ .type = BT_VALUE_TYPE_STRING,
+};
+
+static const char *sess_not_found_action_choices[] = {
+ SESS_NOT_FOUND_ACTION_CONTINUE_STR,
+ SESS_NOT_FOUND_ACTION_FAIL_STR,
+ SESS_NOT_FOUND_ACTION_END_STR,
+};
+
+static struct bt_param_validation_map_value_entry_descr params_descr[] = {
+ { INPUTS_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY, { BT_VALUE_TYPE_ARRAY, .array = {
+ .min_length = 1,
+ .max_length = 1,
+ .element_type = &inputs_elem_descr,
+ } } },
+ { SESS_NOT_FOUND_ACTION_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_OPTIONAL, { BT_VALUE_TYPE_STRING, .string = {
+ .choices = sess_not_found_action_choices,
+ } } },
+ BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END
+};
+
static
-struct lttng_live_component *lttng_live_component_create(const bt_value *params,
- bt_logging_level log_level, bt_self_component *self_comp)
+bt_component_class_initialize_method_status lttng_live_component_create(
+ const bt_value *params,
+ bt_logging_level log_level,
+ bt_self_component *self_comp,
+ struct lttng_live_component **component)
{
- struct lttng_live_component *lttng_live;
+ struct lttng_live_component *lttng_live = NULL;
const bt_value *inputs_value;
const bt_value *url_value;
const bt_value *value;
const char *url;
+ enum bt_param_validation_status validation_status;
+ gchar *validation_error = NULL;
+ bt_component_class_initialize_method_status status;
+
+ validation_status = bt_param_validation_validate(params, params_descr,
+ &validation_error);
+ if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) {
+ status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR;
+ goto error;
+ } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) {
+ BT_COMP_LOGE_APPEND_CAUSE(self_comp, "%s", validation_error);
+ status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR;
+ goto error;
+ }
lttng_live = g_new0(struct lttng_live_component, 1);
if (!lttng_live) {
+ status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR;
goto end;
}
lttng_live->log_level = log_level;
lttng_live->max_query_size = MAX_QUERY_SIZE;
lttng_live->has_msg_iter = false;
- inputs_value = bt_value_map_borrow_entry_value_const(params,
- INPUTS_PARAM);
- if (!inputs_value) {
- BT_COMP_LOGE("Mandatory `%s` parameter missing", INPUTS_PARAM);
- goto error;
- }
-
- if (!bt_value_is_array(inputs_value)) {
- BT_COMP_LOGE("`%s` parameter is required to be an array value",
- INPUTS_PARAM);
- goto error;
- }
-
- if (bt_value_array_get_length(inputs_value) != 1) {
- BT_COMP_LOGE("`%s` parameter's length is required to be 1",
- INPUTS_PARAM);
- goto error;
- }
-
- url_value = bt_value_array_borrow_element_by_index_const(inputs_value,
- 0);
- BT_ASSERT(url_value);
-
- if (!bt_value_is_string(url_value)) {
- BT_COMP_LOGE("First element of `%s` parameter is required to be a string value (URL)",
- INPUTS_PARAM);
- goto error;
- }
-
+ inputs_value =
+ bt_value_map_borrow_entry_value_const(params, INPUTS_PARAM);
+ url_value =
+ bt_value_array_borrow_element_by_index_const(inputs_value, 0);
url = bt_value_string_get(url_value);
+
lttng_live->params.url = g_string_new(url);
if (!lttng_live->params.url) {
+ status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR;
goto error;
}
value = bt_value_map_borrow_entry_value_const(params,
SESS_NOT_FOUND_ACTION_PARAM);
if (value) {
- if (!bt_value_is_string(value)) {
- BT_COMP_LOGE("`%s` parameter is required to be a string value",
- SESS_NOT_FOUND_ACTION_PARAM);
- goto error;
- }
-
lttng_live->params.sess_not_found_act =
parse_session_not_found_action_param(value);
- if (lttng_live->params.sess_not_found_act == SESSION_NOT_FOUND_ACTION_UNKNOWN) {
- BT_COMP_LOGE("Unexpected value for `%s` parameter: "
- "value=\"%s\"", SESS_NOT_FOUND_ACTION_PARAM,
- bt_value_string_get(value));
- goto error;
- }
} else {
BT_COMP_LOGI("Optional `%s` parameter is missing: "
"defaulting to `%s`.",
SESSION_NOT_FOUND_ACTION_CONTINUE;
}
+ status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK;
goto end;
error:
lttng_live_component_destroy_data(lttng_live);
lttng_live = NULL;
end:
- return lttng_live;
+ g_free(validation_error);
+
+ *component = lttng_live;
+ return status;
}
BT_HIDDEN
__attribute__((unused)) void *init_method_data)
{
struct lttng_live_component *lttng_live;
- bt_component_class_initialize_method_status ret =
- BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK;
+ bt_component_class_initialize_method_status ret;
bt_self_component *self_comp =
bt_self_component_source_as_self_component(self_comp_src);
bt_logging_level log_level = bt_component_get_logging_level(
bt_self_component_as_component(self_comp));
bt_self_component_add_port_status add_port_status;
- lttng_live = lttng_live_component_create(params, log_level, self_comp);
- if (!lttng_live) {
- ret = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR;
+ ret = lttng_live_component_create(params, log_level, self_comp, <tng_live);
+ if (ret != BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK) {
goto error;
}
add_port_status = bt_self_component_source_add_output_port(
self_comp_src, "out", NULL, NULL);
- switch (add_port_status) {
- case BT_SELF_COMPONENT_ADD_PORT_STATUS_ERROR:
- ret = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR;
- goto error;
- case BT_SELF_COMPONENT_ADD_PORT_STATUS_MEMORY_ERROR:
- ret = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR;
- goto error;
- default:
- break;
+ if (add_port_status != BT_SELF_COMPONENT_ADD_PORT_STATUS_OK) {
+ ret = (int) add_port_status;
+ goto end;
}
bt_self_component_set_data(self_comp, lttng_live);
projects / babeltrace.git / blobdiff