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Moving away from Blogger/Blogspot for blogging

Hello everyone, in recent years I didn't have time to actually blog and the reason was not only the lack of time. The real reason was that personal blogs are no longer this viable as ones were. In the current time, most people read medium or ghost or very development-aligned websites to get their content. In the past years when this blog was created, dzone.com was actually a blog aggregator, where you put your blog and people can vote for it, in a way similar to Reddit.  It was AWESOME having a front and back page and the blog links having a lot of votes sometimes made it to the front page. There was RSS for both pages and it was so so awesome and  Javalobby was a forum back then. I don't know how these guys fcked up that much but shame.  Anyway, all is over ... dzone is completely different, javalobby doesn't exist and to have a personal blog and just rely only on your Twitter or Reddit presence is just too much work for a developer, after all we have to also
Recent posts

NestJS + Mongo + Typegoose

The current state of Mongo with NestJS ( and Node) . Currently you have 3 options to use Mongo with Node (and NestJS). 1)  NestJS + Mongoose  where maybe the best tutorial I have found is here  https://scotch.io/tutorials/building-a-modern-app-using-nestjs-mongodb-and-vuejs  the issue is that I hate the fact I had to write the schema definitions and the typescript interfaces. If you are fine with writing everything 2 times ones the Schema and ones the Document as Typescript Interface maybe this is the best way to go. 2)  NestJS  + TypeORM where you can actually use TypeORM with MongoDB, however I do not recomment this if you want to learn more I would ask you to write this blog post  https://medium.com/articode/typeorm-mongodb-review-8855903228b1 3)   NestJS  + Typegoose - basically what it does is it uses your domain objects to get the schema from them. And this is what this post is all about. There is a lot of documentation how you can achieve that, however I didn't lik

Use Multiple JVM versions on Mac OS and Linux

Linux Download multiple Java versions and put them into /opt/ If you already have some JDK from ubuntu repo or etc not a big deal, just fix the paths bellow Register them as alternatives sudo update-alternatives --install /usr/bin/java java /opt/java-8-oracle/bin/java 1081 sudo update-alternatives --install /usr/bin/java java /opt/sap-machine-jdk-11.0.3/bin/java 1080 Edit your ~/.bashrc file alias java11='sudo update-alternatives --set java /opt/sapmachine-jdk-11.0.3/bin/java;export JAVA_HOME=/opt/sapmachine-jdk-11.0.3/' alias java8='sudo update-alternatives --set java /opt/java-8-oracle/bin/java;export JAVA_HOME=/usr/lib/java-8-oracle/' SAVE and start a new bash terminal execute java8 to use java8 java11 to use java11 the latest version you have set stays as system wide, but the JAVA_HOME is not :( you can put java8 or java11 as a last line in the bashrc but since it is sudo it will always require password when start and is not gr

Use Client Certificate Authentication with Java and RestTemplate

As a follow up of the  http://gochev.blogspot.com/2019/04/convert-pfx-certificate-to-jks-p12-crt.html  we now have a keystore and a truststore (if anyone needs) and we will use this keystore to send client side authentication using Spring's RestTemplate . First copy your keystore.jks and truststore.jks in your classpath, no one wants absolute paths right ?:) Again a reminder  The difference between truststore and keystore if you are not aware is(quote from the   JSSE ref guide ) :   TrustManager: Determines whether the remote authentication credentials (and thus the connection) should be trusted. KeyManager: Determines which authentication credentials to send to the remote host. The magic happens in the creation of SSLContext. Keep in mind the Spring Boot have a nice RestTemplateBuilder but I will not gonna use it, because someone of you might have an older version or like me, might just use a plain old amazing Spring. If you just want to use the keystore: final Stri

Convert PFX certificate to JKS, P12, CRT

I recently had to use a PFX certificate for client authentication (maybe another post will be coming) and for that reason I had to convert it to a Java keystore (JKS).  We will create BOTH a truststore and a keystore, because based on your needs you might need one or the other.  The difference between truststore and keystore if you are not aware is(quote from the JSSE ref guide : TrustManager: Determines whether the remote authentication credentials (and thus the connection) should be trusted. KeyManager: Determines which authentication credentials to send to the remote host. Ok that's enough what you will need is openssl and Java 7+ ;) ! First let's generate a key from the pfx file, this key is later used for p12 keystore. openssl pkcs12 -in example.pfx -nocerts -out  example .key   Enter Import Password: MAC verified OK Enter PEM pass phrase: Verifying - Enter PEM pass phrase: As shown here you will be asked for the password of the pfx file, l

Youtube video channel of the Bulgarian Java User Group

Bad news everyone, as you already have noticed I do not have time to write blogs :( However I would recommend you to check and keep an eye on the youtube channel of the Bulgarian Java User Group ( http://jug.bg ) which is https://www.youtube.com/user/BulgarianJUG/ You can enjoy all the jprime conference video recordings at  https://www.youtube.com/user/BulgarianJUG/playlists but also checkout the videos tab since we have a lot of non jprime videos uploaded as well and maybe at some point you can even see me ;)

jPrime 2018 videos freely available

Good news everyone, the videos of jPrime 2018 are freely available at  https://www.youtube.com/watch?v=xs3heuY21Z0&list=PLcqA4DRMgIYvGPZfrK0EcMxEQCrtSl9A3 Also in Youtube Bulgarian Java User Group channel you may find a lot of helpful Java related videos from jPrime 2017, 2016, 2015 or other Bulgarian Java User Group talks and activities :  https://www.youtube.com/user/BulgarianJUG/ Hope to see everyone of you at jPrime 2019 ! Or some of the Bulgarian Java User Group ( jug.bg ) or java beer events ( http://java.beer )