feat(agent): properly handle idle laravel queue workers (#1126)

This PR ensures idle laravel queue workers are properly handled by
ending the current transaction and starting a new one.

Author: hahuja2

agent/fw_laravel.c

@@ -1208,6 +1208,19 @@ NR_PHP_WRAPPER(nr_laravel_horizon_end_txn) {
 }
 NR_PHP_WRAPPER_END
 
+/*
+ * End transaction for idle laravel queue workers and then start
+ * a new transaction.
+ */
+NR_PHP_WRAPPER(nr_laravel_queue_restart_transaction) {
+  NR_UNUSED_SPECIALFN;
+  (void)wraprec;
+
+  nr_php_txn_end(1, 0 TSRMLS_CC);
+  nr_php_txn_begin(NULL, NULL TSRMLS_CC);
+}
+NR_PHP_WRAPPER_END
+
 void nr_laravel_enable(TSRMLS_D) {
   /*
    * We set the path to 'unknown' to prevent having to name routing errors.
@@ -1259,6 +1272,15 @@ void nr_laravel_enable(TSRMLS_D) {
   nr_php_wrap_user_function_before_after_clean(
       NR_PSTR("Laravel\\Horizon\\Console\\SupervisorCommand::handle"),
       nr_laravel_horizon_end_txn, NULL, NULL);
+
+  /*
+   * The following function has been added to ensure idle laravel queue workers
+   * are properly handled by ending the current transaction and starting a new
+   * one.
+   */
+  nr_php_wrap_user_function_before_after_clean(
+      NR_PSTR("Illuminate\\Queue\\Worker::daemonShouldRun"),
+      nr_laravel_queue_restart_transaction, NULL, NULL);
 #else
   nr_php_wrap_user_function(NR_PSTR("Symfony\\Component\\Console\\Application::doRun"),
                             nr_laravel_console_application_dorun TSRMLS_CC);