aws_key_gen login for getting AWS Keys locally on command line

If you or your team is working with AWS, you might know how important it is to get the keys while dev or debugging the code.

Command is:

$ ~/ECPCP/aws_key_gen login

It will then promt you to enter your login credentials into corporate account:

Enter your password for MAJFTECH\mfaiz:

Duo two-factor login for MAJFTECH\mfaiz

Then it will ask you to select the method for verification:

For eg. Enter a passcode or select from one of the following options:

1. Duo Push to Android (+XX XXXXX X8847)

2. Phone Call to Android (+XX XXXXX X8847)

3. Duo Push to Android (+XX XXXXX X7658)

4. Phone Call to Android (+XX XXXXX X7658)

Passcode or option (1-4): 4

Dialing +XX XXXXX X7658...

Answered. Press any key on your phone to log in.

Success. Logging you in...

Then it will ask you to choose one of the many AWS accounts that your organization might be using:

Eg. Available AWS Accounts

  [ 1] majf-product--integration-test (12344567)

  [ 2] w3lc-test (123444567)

  [ 3] w3lc-techp-test (162344567)

  [ 4] majftech-lab (982344567)

Please choose an AWS Account: 3

Then it asks you to chosse the role :

Available AWS IAM Roles in w3lc-techp-test (162344567)

  [ 1] ReadOnly (arn:aws:iam:: 162344567:role/ReadOnly)

  [ 2] User (arn:aws:iam:: 162344567:role/User)

Please choose an AWS IAM Role: 2

Finally you get the keys as follows:

Generated new temporary access keys

Role:        arn:aws:iam::132343860784:role/User

Expiration:  Tue Jun 30 08:24:55 UTC 2020 (1 hour from now)

Cheers :)

First Hello World using Hack & HHVM from Facebook

1. Install HHVM on MacOS via Homebrew:

brew tap hhvm/hhvm
brew install hhvm

The out-of-the-box HHVM configuration won't need tweaking by most new users. Notably, the JIT compiler that gives HHVM its speed is on by default. If you want to take a look at the configuration used, it's at /usr/local/etc/hhvm/php.ini in MacOS.

2. Test: After installing HHVM, change to the directory where your code lives, and start up HHVM:

hhvm -m server -p 8080

-m represents the mode and here indicates that HHVM is running in HTTP server mode.

-p configures the TCP port that HHVM uses to listen to HTTP requests. The default port is 80, the standard HTTP port. However, that port requires root access, so for this example, we will use port 8080.

This will start the server as follows and then you can test on browser.

3. Write a simple "Hello World" program named hello.hack:

<<__entrypoint>> function main(): noreturn{ echo "Hello World in Hack Language! \nThis is Anwar Jamal Faiz"; exit(0); }

Save this hello.hack in the same directory that you ran the hhvm command from above. Then, load http://localhost:8080/hello.hack in your browser and verify you see "Hello World!" appear.


See in browser:

You may also write the program as:

<<__entrypoint>>
function main(): noreturn{
  echo "Hello World in Hack Language! \nThis is Anwar Jamal Faiz";
  exit(0);
}

4.  You can directly run file using hhvm itself.

$ hhvm hello.hack

Note: You can configure HHVM too. Running HHVM automatically at boot as a service (instead of just on the command line as above) unfortunately does require some configuration. See the proxygen documentation for details. However, default settings are okay for any average usecase.

Build using Maven - MVN and POM.xml

In order to build a Maven project you can use one of the following:

• mvn clean install
• mvn clean package etc.

This would build/compile and run the tests as well.

However, if you want to run the tests only then what would you do?

Sound similar? Yeah! we all often land up in this situation as an application developer. And, the solution is simple.

You can use mvn test to run unit test in Maven. Few examples :

# Run all the unit test classes.
$ mvn test

# Run a single test class.
$ mvn -Dtest=TestApp1 test

# Run multiple test classes.
$ mvn -Dtest=TestApp1,TestApp2 test

# Run a single test method from a test class.
$ mvn -Dtest=TestApp1#methodname test

# Run all test methods that match pattern 'testHello*' from a test class.
$ mvn -Dtest=TestApp1#testHello* test

# Run all test methods match pattern 'testHello*' and 'testMagic*' from a test class.
$ mvn -Dtest=TestApp1#testHello*+testMagic* test

The default maven-surefire-plugin is outdated, make sure update to the latest to support new features, like pattern matching or run a single test method, and etc.

pom.xml

 <build>
        <plugins>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.0</version>
            </plugin>

        </plugins>
    </build>

Unicode characters in Eclipse console : Resolving Eclipse IDE issue when console runner not shows Unicode and Multibyte characters.

First of all little gyaan:

What is Unicode character string:
Earlier we used ASCII etc to encode characters. But the limit of the number of characters were less. Obviously, you cannot capture world in 256 numbers!
Then we developed some more encoding to cater to all languages but many of them had issues like below:
1. A particular code value corresponds to different letters in the various language standards.
2. The encodings for languages with large character sets have variable length. Some common characters are encoded as single bytes, other require two or more byte.

Here enters our beloved Unicode. Our hero, a new language standard was developed and in this character holds 2 byte. Hence, java or C++ or any language, uses 2 byte for characters representation.

lowest value:\u0000
highest value:\uFFFF


My problem statement in this post is that sometimes the unicode characters are not visible in the output console of Eclipse IDE. This blog post aims to solve that.

Suppose our program is:
public class Simple{
public static void main(String... args){
System.out.println("Hi World!");

String arabicText = "اسمي أنور";
String banglaText = "আমার নাম আনোয়ার";
String urduText = "میرا نام انور ہے";
String hindiText = "मेरा नाम अनवर है";
String frenchText = "Je m'appelle Anwar";

System.out.println(arabicText);
System.out.println(banglaText);
System.out.println(urduText);
System.out.println(hindiText);
System.out.println(frenchText);
}
}

On running the output is:
Hi World!
???? ????
???? ??? ???????
???? ??? ???? ??
???? ??? ???? ??
Je m'appelle Anwar

See screenshot:






To resolve this you need to Modify your Run Configuration:
To Open Your Run Configuration. This can be achiebved by:
In Package Explorer, right click on your project
Run As-> Run Configurations

Here In the common Tab, check the Encoding used:

Change it to UTF8.
Click apply and Run

Now Run the program and you should find correct result. New output is:

Hi World!

اسمي أنور

আমার নাম আনোয়ার

میرا نام انور ہے

मेरा नाम अनवर है

Je m'appelle Anwar

See screenshot:

You can download the repository having the sample code from Gitup. See: https://github.com/Anwar-Faiz/Simple-Java-Unicode