add case-ognl-practise-en. #1743

site/src/site/sphinx/_include_html/arthas-tutorials.html

@@ -755,6 +755,18 @@
                         cn: "case-watch-method-exception-cn",
                     }
                 },
+                {
+                    id: "case-ognl-practise",
+                    type: "USERCASE",
+                    names: {
+                        en: "Debug ognl express",
+                        cn: "调试ognl表达式",
+                    },
+                    ids: {
+                        en: "case-ognl-practise-en",
+                        cn: "case-ognl-practise-cn",
+                    }
+                },
                 {
                     id: "case-thread",
                     type: "USERCASE",

tutorials/katacoda/case-ognl-practise-cn/README.md

@@ -1,25 +0,0 @@
-# Katacoda Hello World
-This is an example repository. Starting building your own scenario by editing the files in this directory. Create additional scenarios by adding additional directories to the top level folder.
-
-
-## index.json
-The file _index.json_ contains all the information about the scenario. It has the title, description and a heading for each step.
-
-The file also contains an imageid. This refers to the Katacoda environment. Here are some environment image IDs you may find useful:
-
-| **Environment**  | **Image ID**  |
-|------------------|---------------|
-| Docker           | docker        |
-| Kubernetes       | kubernetes    |
-| CoreOS           | coreos        |
-| Node.js v6       | node6         |
-| Go               | go            |
-| C#               | c#            |
-| Java             | java8         |
-| Bash             | bash          |
-
-## Pro Author Accounts
-Interested in metrics, private repositories and environments for classroom teaching? Update to become a Pro Author at https://katacoda.com/teach
-
-## Interactive Developer Portals
-Want to take your scenarios to the next level? Visit https://katacoda.com/embed

tutorials/katacoda/case-ognl-practise-cn/index.json

@@ -1,5 +1,4 @@
 {
-  "noindex": true,
   "title": "调试 Arthas 的 ognl 表达式",
   "description": "调试 Arthas 的 ognl 表达式",
   "details": {
@@ -10,8 +9,7 @@
           }
       ],
       "intro": {
-          "text": "intro.md",
+          "text": "intro.md"
-          "credits": ""
       },
       "finish": {
         "text": "finish.md"
@@ -20,10 +18,9 @@
   "files": [
   ],
   "environment": {
-      "hidefinish": true,
       "hideHiddenFiles": true,
       "uilayout": "editor-terminal",
-      "uisettings": "javascript",
+      "uisettings": "java",
       "uieditorpath": "/root/example/ognl-demo"
   },
   "backend": {

tutorials/katacoda/case-ognl-practise-en/finish.md

@@ -0,0 +1,12 @@
+The tutorial demonstrates how to debug `ognl` express in Arthas. If you have more tips or questions, please feel free to tell or ask in Issue.
+
+* For special usage of OGNL, please refer to: https://github.com/alibaba/arthas/issues/71
+* Official Guide to OGNL Expressions: https://commons.apache.org/proper/commons-ognl/language-guide.html
+
+---
+
+* Issues: https://github.com/alibaba/arthas/issues
+* Documentation: https://arthas.aliyun.com/doc/en
+
+If you are using Arthas, please let us know that. Your use is very important to us: [View](https://github.com/alibaba/arthas/issues/111)
+

tutorials/katacoda/case-ognl-practise-en/index.json

@@ -0,0 +1,29 @@
+{
+  "title": "Debug ognl express in Arthas",
+  "description": "Debug ognl express in Arthas",
+  "details": {
+      "steps": [
+          {
+              "text": "step1.md",
+              "code": "setup.sh"
+          }
+      ],
+      "intro": {
+          "text": "intro.md"
+      },
+      "finish": {
+        "text": "finish.md"
+      }
+  },
+  "files": [
+  ],
+  "environment": {
+      "hideHiddenFiles": true,
+      "uilayout": "editor-terminal",
+      "uisettings": "java",
+      "uieditorpath": "/root/example/ognl-demo"
+  },
+  "backend": {
+      "imageid": "openjdk:15"
+  }
+}

tutorials/katacoda/case-ognl-practise-en/intro.md

@@ -0,0 +1,8 @@
+![Arthas](https://arthas.aliyun.com/doc/_images/arthas.png)
+
+`Arthas` is a Java diagnostic tool open-sourced by Alibaba middleware team. Arthas helps developers in trouble-shooting issues in production environment for Java based applications without modifying code or restarting servers.
+
+This tutorial show how to debug `ognl` express in Arths.
+
+* Github: https://github.com/alibaba/arthas
+* Docs: https://arthas.aliyun.com/doc/en

tutorials/katacoda/case-ognl-practise-en/setup.sh

@@ -0,0 +1 @@
+mkdir -p example; cd example/; git clone https://github.com/hengyunabc/ognl-demo.git ; cd ognl-demo

tutorials/katacoda/case-ognl-practise-en/step1.md

@@ -0,0 +1,42 @@
+
+Demonstrate the workflow of the `ognl` expression in the `watch` command in Arthas. You can modify the expressions in `Demo.java`, and compile and run the code.
+
+Project: https://github.com/hengyunabc/ognl-demo
+
+# Open the Demo.java file
+
+`src/main/java/com/example/ognl/Demo.java`{{open}}
+
+# Compile and run the code
+
+`mvn compile exec:java`{{execute}}
+
+Expression in the code:
+
+```java
+String watchExpress = "{target, params, returnObj, #cost}";
+String conditionExpress = "params[0] > 1 && #cost > 0.1";
+```
+
+The result is similar to the following expression:
+
+```bash
+watch com.example.ognl.TestService test "{target, params, returnObj, #cost}" "params[0] > 1 && #cost > 0.1" -x 3
+```
+
+# View the expression result when the method throws an exception
+
+`mvn compile exec:java -DexceptionCase=true`{{execute}}
+
+Expression in the code:
+
+```java
+String watchExpress = "{target, params, throwExp}";
+String conditionExpress = "params[0] > 1";
+```
+
+The result is similar to the following expression:
+
+```bash
+watch com.example.ognl.TestService test "{target, params, throwExp}" "params[0] > 1" -e -x 2
+```