Fix[mqbs::FileStore]: Do not remove purge record even if app is deleted (#425)

Signed-off-by: Yuan Jing Vincent Yan <[email protected]>

Author: kaikulimu

src/groups/mqb/mqbc/mqbc_storageutil.cpp

@@ -1957,7 +1957,9 @@ void StorageUtil::recoveredQueuesCb(
                 // (something like 'inRecovery=true'), based on which storage
                 // implementation may or may not invoke certain business logic.
 
-                rs->purge(appKey);
+                if (rs->hasVirtualStorage(appKey)) {
+                    rs->purge(appKey);
+                }
             }
 
             // TBD: check if adding 'else if' clauses for 'ADDITION',

src/groups/mqb/mqbs/mqbs_filestore.cpp

@@ -1732,23 +1732,7 @@ int FileStore::recoverMessages(QueueKeyInfoMap*     queueKeyInfoMap,
                     }
                 }
 
-                if (!appKey.isNull()) {
-                    // Specific appKey is purged.
-                    StorageKeysOffsetsConstIter appKeyIt =
-                        deletedAppKeysOffsets.find(appKey);
-
-                    if (appKeyIt != deletedAppKeysOffsets.end()) {
-                        BSLS_ASSERT_SAFE(jit->recordOffset() !=
-                                         appKeyIt->second);
-                        if (jit->recordOffset() < appKeyIt->second) {
-                            // This record appears before the QueueOp.DELETION
-                            // record for this appKey so should be ignored.
-
-                            continue;  // CONTINUE
-                        }
-                    }
-                }
-                else {
+                if (appKey.isNull()) {
                     // Entire queue is purged.
                     purgedQueueKeys.insert(queueKey);
                 }