[isis-app-demo] 02/19: adds subscriber for Pets to cascade delete if PetOwner is deleted

[da...@apache.org]

This is an automated email from the ASF dual-hosted git repository.

danhaywood pushed a commit to branch main
in repository https://gitbox.apache.org/repos/asf/isis-app-demo.git

commit 47726c7e93ad07e7f2984d929d4068a00d8a6078
Author: Dan Haywood <da...@haywood-associates.co.uk>
AuthorDate: Tue Oct 5 18:31:06 2021 +0100

    adds subscriber for Pets to cascade delete if PetOwner is deleted
---
 .../pets/dom/pet/PetOwnerForPetsSubscriber.java    | 31 ++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/module-pets/src/main/java/petclinic/modules/pets/dom/pet/PetOwnerForPetsSubscriber.java b/module-pets/src/main/java/petclinic/modules/pets/dom/pet/PetOwnerForPetsSubscriber.java
new file mode 100644
index 0000000..1c94b98
--- /dev/null
+++ b/module-pets/src/main/java/petclinic/modules/pets/dom/pet/PetOwnerForPetsSubscriber.java
@@ -0,0 +1,31 @@
+package petclinic.modules.pets.dom.pet;
+
+import java.util.List;
+
+import javax.inject.Inject;
+
+import org.springframework.context.event.EventListener;
+import org.springframework.stereotype.Service;
+
+import org.apache.isis.applib.services.repository.RepositoryService;
+
+import petclinic.modules.pets.dom.petowner.PetOwner;
+import petclinic.modules.pets.dom.petowner.PetOwner_delete;
+
+@Service
+public class PetOwnerForPetsSubscriber {
+
+    @EventListener(PetOwner_delete.ActionEvent.class)
+    public void on(PetOwner_delete.ActionEvent ev) {
+        switch(ev.getEventPhase()) {
+            case EXECUTING:
+                PetOwner petOwner = ev.getSubject();
+                List<Pet> pets = petRepository.findByPetOwner(petOwner);
+                pets.forEach(repositoryService::remove);
+                break;
+        }
+    }
+
+    @Inject PetRepository petRepository;
+    @Inject RepositoryService repositoryService;
+}