Docs: adapt the rotation client example to the API changes
authorJérémie Galarneau <jeremie.galarneau@efficios.com>
Wed, 15 Aug 2018 20:42:43 +0000 (16:42 -0400)
committerJérémie Galarneau <jeremie.galarneau@efficios.com>
Thu, 16 Aug 2018 20:01:30 +0000 (16:01 -0400)
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
doc/examples/rotation/rotate-client-example.c

index 9dcbdfbacf26d260703b5a747cadc3771f72d842..a9d8b9f311a7edbbb1a94c642075134724a1d83c 100644 (file)
@@ -87,7 +87,7 @@ int setup_session(const char *session_name, const char *path)
        ret = lttng_enable_event_with_exclusions(chan_handle, &ev, "mychan", NULL,
                        0, NULL);
        if (ret < 0) {
-               fprintf(stderr, "Failed to enable events\n");
+               fprintf(stderr, "Failed to enable events (ret = %i)\n", ret);
                goto end;
        }
        printf("Enabled all system call kernel events\n");
@@ -155,83 +155,88 @@ static
 int rotate_session(const char *session_name, const char *ext_program)
 {
        int ret;
-       char *path = NULL;
-       struct lttng_rotation_manual_attr *attr = NULL;
        struct lttng_rotation_handle *handle = NULL;
        enum lttng_rotation_status rotation_status;
+       enum lttng_rotation_state rotation_state = LTTNG_ROTATION_STATE_ONGOING;
        char cmd[PATH_MAX];
 
-       attr = lttng_rotation_manual_attr_create();
-       if (!attr) {
-               fprintf(stderr, "Failed to create rotate attr\n");
-               ret = -1;
-               goto end;
-       }
-
-       ret = lttng_rotation_manual_attr_set_session_name(attr, session_name);
-       if (ret < 0) {
-               fprintf(stderr, "Failed to set rotate attr session name\n");
-               goto end;
-       }
-
        printf("Rotating the output files of session %s", session_name);
 
-       ret = lttng_rotate_session(attr, &handle);
+       ret = lttng_rotate_session(session_name, NULL, &handle);
        if (ret < 0) {
                fprintf(stderr, "Failed to rotate session, %s\n", lttng_strerror(ret));
                goto end;
        }
 
        fflush(stdout);
+
        do {
-               ret = lttng_rotation_is_pending(handle);
-               if (ret < 0) {
-                       fprintf(stderr, "Rotate pending failed\n");
+               rotation_status = lttng_rotation_handle_get_state(handle,
+                               &rotation_state);
+               if (rotation_status != LTTNG_ROTATION_STATUS_OK) {
+                       ret = -1;
+                       fprintf(stderr, "Failed to get the current rotation's state\n");
                        goto end;
                }
 
                /*
-                * Data sleep time before retrying (in usec). Don't sleep if the call
-                * returned value indicates availability.
+                * Data sleep time before retrying (in usec). Don't
+                * sleep if the call returned value indicates
+                * availability.
                 */
-               if (ret) {
+               if (rotation_state == LTTNG_ROTATION_STATE_ONGOING) {
                        usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME);
                        printf(".");
                        fflush(stdout);
                }
-       } while (ret == 1);
+       } while (rotation_state == LTTNG_ROTATION_STATE_ONGOING);
        printf("\n");
 
-       rotation_status = lttng_rotation_handle_get_status(handle);
-       switch(rotation_status) {
-       case LTTNG_ROTATION_STATUS_COMPLETED:
-               lttng_rotation_handle_get_output_path(handle, &path);
-               printf("Output files of session %s rotated to %s\n", session_name, path);
-               ret = snprintf(cmd, PATH_MAX, "%s %s", ext_program, path);
+       switch (rotation_state) {
+       case LTTNG_ROTATION_STATE_COMPLETED:
+       {
+               const struct lttng_trace_archive_location *location;
+               const char *absolute_path;
+               enum lttng_trace_archive_location_status location_status;
+
+               rotation_status = lttng_rotation_handle_get_archive_location(
+                               handle, &location);
+               if (rotation_status != LTTNG_ROTATION_STATUS_OK) {
+                       fprintf(stderr, "Failed to retrieve the rotation's completed chunk archive location\n");
+                       ret = -1;
+                       goto end;
+               }
+
+               location_status = lttng_trace_archive_location_local_get_absolute_path(
+                               location, &absolute_path);
+               if (location_status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
+                       fprintf(stderr, "Failed to get absolute path of completed chunk archive");
+                       ret = -1;
+                       goto end;
+               }
+
+               printf("Output files of session %s rotated to %s\n",
+                               session_name, absolute_path);
+               ret = snprintf(cmd, PATH_MAX, "%s %s", ext_program, absolute_path);
                if (ret < 0) {
                        fprintf(stderr, "Failed to prepare command string\n");
                        goto end;
                }
                ret = system(cmd);
                goto end;
-       case LTTNG_ROTATION_STATUS_STARTED:
-               /* Should not happen after a rotate_pending. */
-               printf("Rotation started for session %s\n", session_name);
-               ret = 0;
-               goto end;
-       case LTTNG_ROTATION_STATUS_EXPIRED:
-               printf("Output files of session %s rotated, but handle expired", session_name);
+       }
+       case LTTNG_ROTATION_STATE_EXPIRED:
+               printf("Output files of session %s rotated, but the handle expired\n", session_name);
                ret = 0;
                goto end;
-       case LTTNG_ROTATION_STATUS_ERROR:
-               fprintf(stderr, "An error occurred with the rotation of session %s", session_name);
+       case LTTNG_ROTATION_STATE_ERROR:
+               fprintf(stderr, "An error occurred with the rotation of session %s\n", session_name);
                ret = -1;
                goto end;
        }
 
 end:
        lttng_rotation_handle_destroy(handle);
-       lttng_rotation_manual_attr_destroy(attr);
        return ret;
 }
 
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