poorbarcode commented on code in PR #21664:
URL: https://github.com/apache/pulsar/pull/21664#discussion_r1419875489


##########
pulsar-client-tools/src/test/java/org/apache/pulsar/admin/cli/TestCmdTopics.java:
##########
@@ -160,4 +168,59 @@ public void testPartitionedLookupSortByBroker() throws 
Exception {
         partitionedLookup.sortByBroker = true;
         verify(mockLookup).lookupPartitionedTopic(eq(topic.toString()));
     }
+    @Test
+    public void testRunDeleteSingleTopic() throws PulsarAdminException, 
IOException {

Review Comment:
   Could you also add a test that some topics could not be deleted successfully?



##########
pulsar-client-tools/src/main/java/org/apache/pulsar/admin/cli/CmdTopics.java:
##########
@@ -726,10 +734,38 @@ private class DeleteCmd extends CliCommand {
                 + "but the parameter is invalid and the schema is always 
deleted", hidden = true)
         private boolean deleteSchema = false;
 
+        @Parameter(names = {"-r", "regex"},
+                description = "Use a regex expression to match multiple topics 
for deletion.")
+        boolean regex = false;
+
+        @Parameter(names = {"--from-file"}, description = "Read a list of 
topics from a file for deletion.")
+        boolean readFromFile;
+
+
         @Override
-        void run() throws PulsarAdminException {
-            String topic = validateTopicName(params);
-            getTopics().delete(topic, force);
+        void run() throws PulsarAdminException, IOException {
+            if (readFromFile && regex) {
+                throw new ParameterException("Could not apply regex when read 
topics from file.");
+            }
+            if (readFromFile) {
+                String path = checkArgument(params);
+                List<String> topicsFromFile = 
Files.readAllLines(Path.of(path));
+                for (String t : topicsFromFile) {
+                    getTopics().delete(t, force);

Review Comment:
   If one topic has been deleted before, what will happen here?



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