improved exception handling.

Civi/FormProcessor/API/Exception.php

+<?php
+/**
+ * @author Jaap Jansma <jaap.jansma@civicoop.org>
+ * @license AGPL-3.0
+ */
+
+namespace Civi\FormProcessor\API;
+
+use Throwable;
+
+class Exception extends \Exception {
+
+  public function __construct($actionName, Throwable $previous = NULL) {
+    $message = "Action ".$actionName." failed.";
+    if ($previous) {
+      $message .= " Caused by ".$previous->getMessage();
+    }
+    parent::__construct($message, null, $previous);
+  }
+
+}
\ No newline at end of file

Civi/FormProcessor/API/FormProcessor.php

@@ -204,9 +204,13 @@
       } else {
         // There is no delay. Execute the action immediately
         // Now execute the action
-        $outputBag = $actionClass->execute($mappedParameterBag, $mappedConditionParameterBag, $mappedConditionOutputParameterBag);
-        // Add the output of the action to the data bag of this action.
-        $dataBag->setActionDataFromActionProviderParameterBag($objAction, $outputBag);
+        try {
+          $outputBag = $actionClass->execute($mappedParameterBag, $mappedConditionParameterBag, $mappedConditionOutputParameterBag);
+          // Add the output of the action to the data bag of this action.
+          $dataBag->setActionDataFromActionProviderParameterBag($objAction, $outputBag);
+        } catch (\Exception $e) {
+          throw new Exception($action['title'], $e);
+        }
       }
 		}
 		

Civi/FormProcessor/API/FormProcessorDefaults.php

@@ -177,11 +177,14 @@
       $condition = \CRM_FormProcessor_Condition::getConditionClass($action['condition_configuration']);
       $actionClass->setCondition($condition);
 
-      // Now execute the action
-      $outputBag = $actionClass->execute($mappedParameterBag, $mappedConditionParameterBag, $mappedConditionOutputParameterBag);
-
-			// Add the output of the action to the data bag of this action.
-			$dataBag->setActionDataFromActionProviderParameterBag($objAction, $outputBag);
+      try {
+        // Now execute the action
+        $outputBag = $actionClass->execute($mappedParameterBag, $mappedConditionParameterBag, $mappedConditionOutputParameterBag);
+        // Add the output of the action to the data bag of this action.
+        $dataBag->setActionDataFromActionProviderParameterBag($objAction, $outputBag);
+      } catch (\Exception $e) {
+        throw new Exception($action['title'], $e);
+      }
 		}
 		
 		$return = array();