From d94866a89dc2217fc64fd4f6f8504dc5b8e5a1c4 Mon Sep 17 00:00:00 2001
From: Fangbin Sun <sunfangbin@gmail.com>
Date: Sun, 20 Jan 2019 11:10:04 +0800
Subject: [PATCH] Support CLI pulsar-client for concise description. (#3381)

### Motivation
Fixes [#3364](https://github.com/apache/pulsar/issues/3364)

### Modifications

Print corresponding usage according to the parsed command.
---
 .../java/org/apache/pulsar/client/cli/PulsarClientTool.java    | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pulsar-client-tools/src/main/java/org/apache/pulsar/client/cli/PulsarClientTool.java b/pulsar-client-tools/src/main/java/org/apache/pulsar/client/cli/PulsarClientTool.java
index 67b421afa7803..e10caf0d7e18a 100644
--- a/pulsar-client-tools/src/main/java/org/apache/pulsar/client/cli/PulsarClientTool.java
+++ b/pulsar-client-tools/src/main/java/org/apache/pulsar/client/cli/PulsarClientTool.java
@@ -134,8 +134,9 @@ public int run(String[] args) {
             }
         } catch (Exception e) {
             System.out.println(e.getMessage());
+            String chosenCommand = commandParser.getParsedCommand();
             if (e instanceof ParameterException) {
-                commandParser.usage();
+                commandParser.usage(chosenCommand);
             } else {
                 e.printStackTrace();
             }