[improve][admin][branch-3.0] Expose the offload threshold in seconds …

…to the admin (apache#22169)

(cherry picked from commit 21660bd)

pulsar-client-tools/src/main/java/org/apache/pulsar/admin/cli/CmdNamespaces.java

@@ -1961,7 +1961,8 @@ private class GetOffloadThreshold extends CliCommand {
         @Override
         void run() throws PulsarAdminException {
             String namespace = validateNamespace(params);
-            print(getAdmin().namespaces().getOffloadThreshold(namespace));
+            print("offloadThresholdInBytes: " + getAdmin().namespaces().getOffloadThreshold(namespace));
+            print("offloadThresholdInSeconds: " + getAdmin().namespaces().getOffloadThresholdInSeconds(namespace));
         }
     }
 
@@ -1979,11 +1980,18 @@ private class SetOffloadThreshold extends CliCommand {
                    required = true)
         private String thresholdStr = "-1";
 
+        @Parameter(names = {"--time", "-t"},
+            description = "Maximum number of seconds stored on the pulsar cluster for a topic"
+                + " before the broker will start offloading to longterm storage (eg: 10m, 5h, 3d, 2w).")
+        private String thresholdInSeconds = "-1";
+
         @Override
         void run() throws PulsarAdminException {
             String namespace = validateNamespace(params);
             long threshold = validateSizeString(thresholdStr);
+            long timeInSeconds = RelativeTimeUtil.parseRelativeTimeInSeconds(thresholdInSeconds);
             getAdmin().namespaces().setOffloadThreshold(namespace, threshold);
+            getAdmin().namespaces().setOffloadThresholdInSeconds(namespace, timeInSeconds);
         }
     }