Conversion on Micha Kops' Tech Notes

Java Bean Mapping with MapStruct

Thu, 31 Mar 2022 00:00:00 +0200

MapStruct is a nice tool to generate mappers for converting one Java bean into another e.g. for projections, data-transfer-objects and so on …

As long as fields in source and target beans do match, the mapper is able to generate the data setting automatically .. else we may specify which source fields to map into which target fields or to register custom converters with ease.

Using Maven, we need to add dependencies and plugin integration to our pom.xml:

AsciiDoc Snippets

Fri, 10 May 2019 00:00:00 +0200

AsciiDoc Syntax and Features

Using AsciiMath

Include stem into document header

:stem:

Then use inline, e.g.:

stem:[sqrt(4) = 2]

or as block

[stem]
++++
sum_(i=1)^n i^3=((n(n+1))/2)^2
++++

AsciiMath Syntax

Collapsible Blocks/Sections

.Click to show the content
[%collapsible]
====
Long content here...
====

Source: Asciidoctor Docs

Tools and Ecosystem

Docker / Podman Container

Including stuff like:

Asciidoctor
Asciidoctor Diagram with ERD and Graphviz integration (supports plantuml and graphiz diagrams)
Asciidoctor PDF
Asciidoctor EPUB3
Asciidoctor FB2
Asciidoctor Mathematical
Asciidoctor reveal.js
AsciiMath
Source highlighting using Rouge, CodeRay or Pygments
Asciidoctor Confluence
Asciidoctor Bibtex
Asciidoctor Kroki
Asciidoctor Reducer

Docker Snippets

Mon, 01 Mar 2010 00:00:00 +0100

Restrict Network

Can be useful when using a third-party image that we do not trust

Run with no network

docker run --network none <image>

Run with private isolated network

At least containers attached to this network can talk with another

docker network create --internal my_isolated_network
docker run --network my_isolated_network <image>

Block using firewall

e.g. using iptables or ipfw

# Get container's IP
docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' <container_name>

# Block all outbound connections from that IP
sudo iptables -I DOCKER-USER -s <container_ip> -j DROP