In this series of pages, I will discuss project reactor and reactive programming from basic concepts to reactor internal implementation details. This discussion is based on the official reference documentation, the java-doc, talks by maintainers of reactor e.g. at the spring I/O and other distributed material, and should summarise and connect all this information. It should complement the official reference documentation and java-doc. Although the name says "from zero to hero", basic knowledge about the library is advised to fully benefit from it.
As a short disclaimer, I am a professional software engineer with some years of experience in using reactor, but not a maintainer or creator of the library. Information and knowledge in this post are based on the official documentation and talks, but I cannot exclude misconceptions on my side.
- [Why and when to use Reactor](https://gist.github.com/Lukas-Krickl/50f1daebebaa72c7e944b7c319e3c073#file-01-why-and-when-to-use
Create a template service file at /etc/systemd/system/[email protected]. The template parameter will correspond to the name
of target host:
[Unit]
Description=Setup a secure tunnel to %I
After=network.target
| /* | |
| JPA (Java Persistence API) | |
| Transaction Management with an Entity-Mananger: | |
| --- | |
| entityManager.getTransaction().begin(); | |
| entityManager.persist(<some-entity>); | |
| entityManager.getTransaction().commit(); | |
| entityManager.clear(); |
| #!/bin/bash | |
| # save the file as <git_directory>/.git/hooks/pre-commit | |
| echo "Running Maven clean test for errors" | |
| # retrieving current working directory | |
| CWD=`pwd` | |
| MAIN_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )" | |
| # go to main project dir | |
| cd $MAIN_DIR/../../ |
| package com.peeyush.common.utils; | |
| import com.fasterxml.jackson.annotation.JsonInclude.Include; | |
| import com.fasterxml.jackson.core.JsonGenerationException; | |
| import com.fasterxml.jackson.core.JsonParseException; | |
| import com.fasterxml.jackson.core.JsonProcessingException; | |
| import com.fasterxml.jackson.core.type.TypeReference; | |
| import com.fasterxml.jackson.databind.DeserializationFeature; | |
| import com.fasterxml.jackson.databind.JsonMappingException; | |
| import com.fasterxml.jackson.databind.JsonNode; |
| postgres: | |
| image: postgres:9.4 | |
| volumes: | |
| - ./init.sql:/docker-entrypoint-initdb.d/init.sql |