From: Kai Moritz Date: Sat, 31 Oct 2020 15:59:17 +0000 (+0100) Subject: Added data-jdbc as git submodule jdbc X-Git-Tag: part-2~10 X-Git-Url: http://juplo.de/gitweb/?a=commitdiff_plain;h=64251b8eafa2534c359e8e2fc243c17b5a97a61a;p=demos%2Fkafka%2Foutbox Added data-jdbc as git submodule jdbc --- 64251b8eafa2534c359e8e2fc243c17b5a97a61a diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..612c5bc --- /dev/null +++ b/.gitignore @@ -0,0 +1,3 @@ +target +.idea +*.iml diff --git a/.gitmodules b/.gitmodules new file mode 100644 index 0000000..a9ff7f6 --- /dev/null +++ b/.gitmodules @@ -0,0 +1,4 @@ +[submodule "data-jdbc"] + path = jdbc + url = https://juplo.de/git/demos/spring/data-jdbc + branch = outbox diff --git a/README.md b/README.md new file mode 100644 index 0000000..2748ed9 --- /dev/null +++ b/README.md @@ -0,0 +1,40 @@ +# Implementation of the Outbox-Pattern for Apache Kafka + +This Repository holds the source code for +[a blog-series that explains a technically complete implementation of the outbox-pattern for Apache Kafka](https://juplo.de/implementing-the-outbox-pattern-with-kafka-part-1-the-outbox-table/). + +Execute [README.sh](README.sh) in a shell to demonstrate the example: + + ./README.sh + +The script will... + +* compile the component, +* package it as Docker-Images, +* start up the component and a PostreSQL as containers in a [Compose-Setup](docker-compose.yml), +* execute example-queries (CREATE / DELETE) against the API of [the example-project](https://juplo.de/implementing-the-outbox-pattern-with-kafka-part-0-the-example/) and +* tail the logs of the containers `jdbc` to show what is going on. + +You can verify the expected outcome of the demonstration by running a command like the following: + + $ docker-compose exec postgres psql -Uoutbox -c'SELECT * FROM outbox;' -Ppager=0 outbox | grep peter + 1 | peter1 | "CREATED" | 2021-05-16 13:20:36.849 + 10 | peter2 | "CREATED" | 2021-05-16 13:20:42.141 + 19 | peter3 | "CREATED" | 2021-05-16 13:20:47.136 + 28 | peter4 | "CREATED" | 2021-05-16 13:20:52.087 + 37 | peter5 | "CREATED" | 2021-05-16 13:20:57.512 + 46 | peter6 | "CREATED" | 2021-05-16 13:21:02.493 + 55 | peter7 | "CREATED" | 2021-05-16 13:21:07.503 + $ + +The example-output shows, that the CREATE-event for users with "peter" in their username are only stored exactly once in the outbox-table, although the script issues several requests for each of these users. + +Be aware, that the outcome of the script will be different, if you run it several times. +In order to reproduce the same behaviour, you have to shut down the Compose-Setup before rerunning the script: + + docker-compose down -v + ./README.sh + +To clean up all created artifacts one can run: + + ./README.sh cleanup diff --git a/README.sh b/README.sh new file mode 100755 index 0000000..89aa269 --- /dev/null +++ b/README.sh @@ -0,0 +1,52 @@ +#!/bin/bash + +if [ "$1" = "cleanup" ] +then + docker-compose down -v + mvn clean + docker image rm juplo/data-jdbc:polling-outbox-2-SNAPSHOT + exit +fi + +if [[ + $(docker image ls -q juplo/data-jdbc:polling-outbox-2-SNAPSHOT) == "" || + "$1" = "build" +]] +then + mvn install || exit +else + echo "Using image existing images:" + docker image ls juplo/data-jdbc:polling-outbox-2-SNAPSHOT +fi + +docker-compose up -d jdbc + +while ! [[ $(http :8080/actuator/health 2>/dev/null | jq -r .status) == "UP" ]]; +do + echo "Waiting for User-Service..."; + sleep 1; +done + + +docker-compose logs --tail=0 -f jdbc & + +for i in `seq 1 7`; +do + echo peter$i | http :8080/users + echo uwe$i | http :8080/users + echo peter$i | http :8080/users + echo simone$i | http :8080/users + echo beate$i | http :8080/users + http DELETE :8080/users/franz$i + http DELETE :8080/users/simone$i + echo beate$i | http :8080/users + http DELETE :8080/users/beate$i + echo franz$i | http :8080/users + echo franz$i | http :8080/users + echo beate$i | http :8080/users + http DELETE :8080/users/uwe$i + sleep 1 +done; + +docker-compose exec postgres psql -Uoutbox -c'SELECT * FROM outbox;' -Ppager=0 outbox +docker-compose stop diff --git a/docker-compose.yml b/docker-compose.yml new file mode 100644 index 0000000..d04c665 --- /dev/null +++ b/docker-compose.yml @@ -0,0 +1,27 @@ +version: "3" + +services: + + jdbc: + image: juplo/data-jdbc:polling-outbox-2-SNAPSHOT + ports: + - 8080:8080 + environment: + spring.profiles.active: prod + depends_on: + - postgres + + + postgres: + image: postgres:13 + ports: + - 5432:5432 + environment: + POSTGRES_USER: outbox + POSTGRES_PASSWORD: outbox + POSTGRES_DB: outbox + volumes: + - pgdata:/var/lib/postgresql/data/ + +volumes: + pgdata: diff --git a/jdbc b/jdbc new file mode 160000 index 0000000..d2fbbf0 --- /dev/null +++ b/jdbc @@ -0,0 +1 @@ +Subproject commit d2fbbf029e151e37fcd48cbbdb90c3c14a48aa8d diff --git a/pom.xml b/pom.xml new file mode 100644 index 0000000..3e46567 --- /dev/null +++ b/pom.xml @@ -0,0 +1,20 @@ + + + + 4.0.0 + + de.juplo.kafka.outbox + polling-outbox-parent + polling-outbox-2-SNAPSHOT + pom + polling-outbox-parent + Simple example-implementation of the Polling-Outbox-Pattern + + + jdbc + + +