yesamer commented on code in PR #3934:
URL: 
https://github.com/apache/incubator-kie-kogito-runtimes/pull/3934#discussion_r2104417293


##########
addons/common/persistence/filesystem/src/main/java/org/kie/kogito/persistence/filesystem/FileSystemProcessInstances.java:
##########
@@ -93,27 +95,32 @@ public Stream<ProcessInstance> 
stream(ProcessInstanceReadMode mode) {
 
     @Override
     public boolean exists(String id) {
-        return Files.exists(Paths.get(storage.toString(), id));
+        Path processInstanceStorage = PathUtils.getSecuredPath(storage, id);
+        return Files.exists(processInstanceStorage) && 
Files.isRegularFile(processInstanceStorage);
     }
 
     @SuppressWarnings("unchecked")
     @Override
+
     public void create(String id, ProcessInstance instance) {
         if (isActive(instance)) {
-            Path processInstanceStorage = Paths.get(storage.toString(), id);
-            if (Files.exists(processInstanceStorage)) {
+            Path processInstanceStorage = PathUtils.getSecuredPath(storage, 
id);
+            if (Files.notExists(processInstanceStorage) || 
!Files.isRegularFile(processInstanceStorage)) {
+                storeProcessInstance(processInstanceStorage, instance);
+            } else {
                 throw new ProcessInstanceDuplicatedException(id);
             }
-            storeProcessInstance(processInstanceStorage, instance);
         }
     }
 
     @SuppressWarnings("unchecked")
     @Override
     public void update(String id, ProcessInstance instance) {
         if (isActive(instance)) {
-            Path processInstanceStorage = Paths.get(storage.toString(), id);
-            if (Files.exists(processInstanceStorage)) {
+            Path processInstanceStorage = PathUtils.getSecuredPath(storage, 
id);
+            if (Files.notExists(processInstanceStorage) && 
!Files.isRegularFile(processInstanceStorage)) {

Review Comment:
   @gitgabrio 



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