+/*
+ * Depending on the event, return a newly allocated JUL filter expression or
+ * NULL if not applicable.
+ *
+ * An event with NO loglevel and the name is * will return NULL.
+ */
+static char *set_jul_filter(const char *filter, struct lttng_event *ev)
+{
+ int err;
+ char *jul_filter = NULL;
+
+ assert(ev);
+
+ /* Don't add filter for the '*' event. */
+ if (ev->name[0] != '*') {
+ if (filter) {
+ err = asprintf(&jul_filter, "%s && logger_name == \"%s\"", filter,
+ ev->name);
+ } else {
+ err = asprintf(&jul_filter, "logger_name == \"%s\"", ev->name);
+ }
+ if (err < 0) {
+ PERROR("asprintf");
+ goto end;
+ }
+ }
+
+ /* Add loglevel filtering if any for the JUL domain. */
+ if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) {
+ char *op;
+
+ if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) {
+ op = ">=";
+ } else {
+ op = "==";
+ }
+
+ if (filter) {
+ err = asprintf(&jul_filter, "%s && int_loglevel %s %d", filter, op,
+ ev->loglevel);
+ } else {
+ err = asprintf(&jul_filter, "int_loglevel %s %d", op,
+ ev->loglevel);
+ }
+ if (err < 0) {
+ PERROR("asprintf");
+ free(jul_filter);
+ jul_filter = NULL;
+ goto end;
+ }
+ }
+
+end:
+ return jul_filter;
+}
+