Sample Enum

package com.example.test.framework.enums;

/**
 * Message matching type
 */
public enum MessageMatchType {
    /** The exact message will be checked. */
    EXACT(0),

    /** The partial of the original message text is matched. */
    PARTIAL(1);

    /** The key. */
    private int key;

    private MessageMatchType(int key) {
        this.key = key;

    }

    public int getKey() {
        return key;
    }

}

Java 9 : JShell

 1. How to run Jshell

    get a command prompt windows key + R --> type cmd

2. Check java version, should be higher than 9

    java -version

3. type "jshell"

4. Now you can write syntax and check validity , edit and play on with this

5. /help --> help command

6. /list   --> will list the command typed/executed

7. edit use edit command with command number, number you can select using /list . Once you use edit, it will prompt with shell to edit.

    /edit 2

Below you I have attached series of commands i tried with all mistakes

----------------------------------------------------------------------------------------------------------------------

Microsoft Windows [Version 10.0.22621.2715]

(c) Microsoft Corporation. All rights reserved.

C:\Users\USR>java -version

openjdk version "21" 2023-09-19

OpenJDK Runtime Environment Zulu21.28+85-CA (build 21+35)

OpenJDK 64-Bit Server VM Zulu21.28+85-CA (build 21+35, mixed mode, sharing)

C:\Users\USR>jshell

|  Welcome to JShell -- Version 21

|  For an introduction type: /help intro

jshell> System.out.println("Hello");

Hello

jshell> /help

|  Type a Java language expression, statement, or declaration.

|  Or type one of the following commands:

|  /list [<name or id>|-all|-start]

|       list the source you have typed

|  /edit <name or id>

|       edit a source entry

|  /drop <name or id>

|       delete a source entry

|  /save [-all|-history|-start] <file>

|       Save snippet source to a file

|  /open <file>

|       open a file as source input

|  /vars [<name or id>|-all|-start]

|       list the declared variables and their values

|  /methods [<name or id>|-all|-start]

|       list the declared methods and their signatures

|  /types [<name or id>|-all|-start]

|       list the type declarations

|  /imports

|       list the imported items

|  /exit [<integer-expression-snippet>]

|       exit the jshell tool

|  /env [-class-path <path>] [-module-path <path>] [-add-modules <modules>] ...

|       view or change the evaluation context

|  /reset [-class-path <path>] [-module-path <path>] [-add-modules <modules>]...

|       reset the jshell tool

|  /reload [-restore] [-quiet] [-class-path <path>] [-module-path <path>]...

|       reset and replay relevant history -- current or previous (-restore)

|  /history [-all]

|       history of what you have typed

|  /help [<command>|<subject>]

|       get information about using the jshell tool

|  /set editor|start|feedback|mode|prompt|truncation|format ...

|       set configuration information

|  /? [<command>|<subject>]

|       get information about using the jshell tool

|  /!

|       rerun last snippet -- see /help rerun

|  /<id>

|       rerun snippets by ID or ID range -- see /help rerun

|  /-<n>

|       rerun n-th previous snippet -- see /help rerun

|

|  For more information type '/help' followed by the name of a

|  command or a subject.

|  For example '/help /list' or '/help intro'.

|

|  Subjects:

|

|  intro

|       an introduction to the jshell tool

|  keys

|       a description of readline-like input editing

|  id

|       a description of snippet IDs and how use them

|  shortcuts

|       a description of keystrokes for snippet and command completion,

|       information access, and automatic code generation

|  context

|       a description of the evaluation context options for /env /reload and /reset

|  rerun

|       a description of ways to re-evaluate previously entered snippets

jshell>

/list

   1 : System.out.println("Hello");

jshell> void printMessage(){

   ...>     System.out.print;n("Hello")

   ...> }

|  Error:

|  not a statement

|      System.out.print;n("Hello")

|      ^--------------^

|  Error:

|  ';' expected

|      System.out.print;n("Hello")

|                                 ^

jshell> printMessage()

|  Error:

|  cannot find symbol

|    symbol:   method printMessage()

|  printMessage()

|  ^----------^

jshell> /lsit

|  Invalid command: /lsit

|  Type /help for help.

jshell> /list

   1 : System.out.println("Hello");

jshell>

        void printMessage(){

   ...>     System.out.print;n("Hello");

   ...> }

|  Error:

|  not a statement

|      System.out.print;n("Hello");

|      ^--------------^

|  Error:

|  cannot find symbol

|    symbol:   method n(java.lang.String)

|      System.out.print;n("Hello");

|                       ^

jshell> void printMessage(){

   ...>     System.out.println("Hello");

   ...> }

|  created method printMessage()

jshell> printMessage

|  Error:

|  cannot find symbol

|    symbol:   variable printMessage

|  printMessage

|  ^----------^

jshell> printMessage()

Hello

jshell> /list

   1 : System.out.println("Hello");

   2 : void printMessage(){

           System.out.println("Hello");

       }

   3 : printMessage()

jshell> edit 2

|  Error:

|  ';' expected

|  edit 2

|      ^

|  Error:

|  cannot find symbol

|    symbol:   variable edit

|  edit 2

|  ^--^

jshell> /edit 2

|  modified method printMessage()

jshell> printMessage()

Hello Edited

jshell>

Java 9

1. REPL Jshell

2.    Collection Factory Method

3. HTTP/2 Client

4. Jigsaw Project /Modularity

5. Other features

https://www.youtube.com/watch?v=NJY-D9JLLdQ

1. Test Jshell

Take a command prompt wind + R -> type "cmd"

2. Check java version, must be above 9

java -version 

3. type "jshell" in command prompt

4. This will help you to test simple syntax

-------------------------------------------------------------------------------------------------

C:\Users\USR>java -version

openjdk version "21" 2023-09-19

OpenJDK Runtime Environment Zulu21.28+85-CA (build 21+35)

OpenJDK 64-Bit Server VM Zulu21.28+85-CA (build 21+35, mixed mode, sharing)

C:\Users\USR>jshell

|  Welcome to JShell -- Version 21

|  For an introduction type: /help intro

jshell> System.out.println("Hello");

Hello

jshell>

API Management

Few things to know

Once you done with development and publishing your APIs, then 

How to secure this APIs

How to analyze usage of these APIs

Scale your APIs

Configure 

to rate limit -> eg: 10 requests per minute

Internal(Private)  and Public (APIs visible to others)

--

Public APIs need more

---

Due to visibility and scrutiny they have

If you have few, you may not bother

you might build embedding them with

security, logging , configuration,  into actual API code

So when more and more requirements coming

Specially where micro service --> where APIs get broken

Note : Micro service are not APIs.

smaller APIs focus with specialized operations

Legacy APIs , what to do

API managment is a process of 

1. Building
2. Publishing
3. Securing
4. Versioning
5. Observing
6. Scaling
7. Cataloging
8. Retiring

There can be more in future.....

We need to make a system to manage the lifecycle of APIs, so company can focus on adding value to core business (coding,..)

1. API Gateway

Handles the routing and management of all the APIs 

through policies that apply to individual API or set of APIs

2. Developer portal

serves as self service hub - developers to access API documentation, sdks, and other resources needed for consuming APIs

3. API dashboard

Observe API usage

view key API metrics

manage variety of API analytics

4. Unified API central catalogue

organizing, cataloging, indexing and presenting all the public and Private APIs use in Organization

API management will add Flexibility and Power where

you are managing each API independently, to a Unified system where you are orchestrating a complete set of APIs as  a product.

Create a API strategy align with your Companies goals - will save lot of resources and work efficiently

Mulesoft Training Public URLs are not working

http://mu.learn.mulesoft.com/delta?wsdl

http://mu.learn.mulesoft.com/united/flights/CLE 

Most of the time you find that, the URLs provided by the Mulesoft is not working or you are working in a company where you have restriction on access.

Solution to these issues is to set up those services running inside your machine.

Solution:

Open the jars folder fromStudents Files zip file where you have already downloaded from course resourses.

Locate "mulesoft-training-services-1.8.8.jar"

Just run this jar

java -jar mulesoft-training-services-1.8.8.jar

You will finally get an output on terminal as below

--------------------------------------------

┌───────────────────────────────────────────────────────────────────────────────────────┐

│ (\_/)          M U L E S O F T    T R A I N I N G   &   C E R T I F I C A T I O N     │

│ /   \          Anypoint Platform Development Fundamentals - Services & APIs           │

└───────────────────────────────────────────────────────────────────────────────────────┘

Starting resources:

- Database started.

- Database tables created.

- Database tables populated.

- JMS message broker started.

- United flights web service started.

- JMS service started.

- American flights RAML API started.

- Banking REST API started.

- Accounts REST API started.

- Delta flights web service started.

Published resources:

- Landing page                   : http://localhost:9090

- JMS message broker URL         : tcp://localhost:61616

- JMS default topic name         : apessentials

- JMS web form                   : http://localhost:9090/jmsform.html

- American flights database URL  : jdbc:derby://localhost:1527/memory:training

- Accounts API                   : http://localhost:9090/accounts/api

- Accounts web form              : http://localhost:9090/accounts/show.html

- American flights REST service  : http://localhost:9090/american/flights

- American flights REST API RAML : http://localhost:9090/american/american-flights-api.raml

- Banking API base URL           : http://localhost:9090/api/...

- Banking API RAML               : http://localhost:9090/api/banking-api.raml

- United flights REST service    : http://localhost:9090/united/flights

- Delta flights SOAP service     : http://localhost:9191/delta

- Delta flights SOAP WSDL        : http://localhost:9191/delta?wsdl

Press CTRL-C to terminate this application...

How to check Wifi password from Windows machine

 It is east to use shell commands to find the password

1. open power shell

2. find all the listed wifis

3. check the password of the selected wifi network

Step 2:

netsh wlan show profile "name=SLT wifi" key=clear

Step 3:

netsh wlan show profile "name=your wifi name" key=clear

3PRnfigqWlCS85vZkZmYa6zS

Springboot 3.1 - Spring security - Create Basic Oauth2 client - Continue

 Let's continue add security features for the basic application we have built. As you can see, we have used the basic inbuild features of the spring security where default username=user and with generated password.

So let's start configuring.

1. we will create class "SecurityConfig" and let's put that inside "config" package

2. Annotate with @Configuration and @EnableWebSecurity

import org.springframework.context.annotation.Configuration;

import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;

3. create new bean with "SecurityFilterChain" with "HttpSecurity"

below is the sample

@Bean
SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
    return http.build();
}

So up to now, the full continue code of the "SecurityConfig" class would looks like below.

Note: we need to add Exception

package com.example.danwega.outh2.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.web.SecurityFilterChain;

@Configuration
@EnableWebSecurity
public class SecurityConfig {

    @Bean
    SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
        return http.build();
    }
}

4. Now let's start adding security features or configure Spring security environment. We will start modifying bean we created "SecurityFilterChain"

let's authorize http requests.

• we use authorizeHttpRequests
• with this we use matchers requestMatchers
•     For home anybody can go -> auth.requestMatchers("/").permitAll()
•     For any other request use authentication --> auth.anyRequest().authenticated()

@Bean
SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
    return http
            .authorizeHttpRequests(auth -> {
                auth.requestMatchers("/").permitAll();
                auth.anyRequest().authenticated();
            })
            .build();
}

5. Now how are you going to login. So for now, let's give a formLogin with defaults

@Bean
SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
    return http
            .authorizeHttpRequests(auth -> {
                auth.requestMatchers("/").permitAll();
                auth.anyRequest().authenticated();
            })
            .formLogin(Customizer.withDefaults())
            .build();
}

let's change the code to static import for "withDefaults"

@Bean
SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
    return http
            .authorizeHttpRequests(auth -> {
                auth.requestMatchers("/").permitAll();
                auth.anyRequest().authenticated();
            })
            .formLogin(withDefaults())
            .build();
}

Now user have to log with user name and password to login

6. without just providing a formLogin, we need to provide a oauth2 login as we are using oauth2.

we add auth2Login with defaults for now.

.oauth2Login(withDefaults())

@Bean
SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
    return http
            .authorizeHttpRequests(auth -> {
                auth.requestMatchers("/").permitAll();
                auth.anyRequest().authenticated();
            })
            .oauth2Login(withDefaults())
            .formLogin(withDefaults())
            .build();
}

That's it for now

7. configure properties to say what oauth2 client, providers we provide.

let's use log level just to what's happening inside when we running the code

logging:
  level:
    org:
      springframework:
        security: TRACE

here we will try to configure for GitHub and Google. 

let's first try with GitHub

Github

click your top right corner icon showing you --> go to "settings" --> left side go to "developer settings" in left bottom corner --> select "OAuth2 app" in left panel

8. Let's Register new application. you can give your details as needed, below is sample set

Application name: Spring Security OAuth2 client

Homepage url : localhost:8210

Application description : optional for now

Authorization callback url : localhost:8210/login/oauth2/code/github

call back url is set according to documentation. when it is google  final part will be "google", instead of "github"

 localhost:8210/login/oauth2/code/google

Click Register Application to finish the process. This will go to page and show you "client secret" and some other information

9.