CommTh

This is my pet project where i try to learn spring-boot. This is beckend of messenger. But unfortunatelly it doesn't contain front-end, so there currently is only rest-api and some html pages for testing.

Technologies

1. Java 17
2. Spring-boot
3. postgres (for storing information about user and message metadata)
4. haproxy (load balancer)
5. redis (cache for storing sessions)
6. cassandra (document db for storing message content)

Scheme

Explanation (en)

• I just started this project and i'm not best at spring, so this is not ideal, but i'm trying to fix that :) (fell free to show me my issues).

• I use Just Oauth2, because i thought that it would be enough, so I'll add password registration outh some day.

• I store sessions in redis because my load balancer uses 'round robin' mechanism (i know i can use tokens, but it is more complicated, i wanna do this in future)

Explanation (ru)

• Я только начал этот проект и не очень хорошо разбираюсь в Spring, поэтому код не идеальный, но я пытаюсь это исправить :) (не стесняйтесь указывать на маи проблемы).

• Я использую только Oauth2, потому что думал, что этого будет достаточно, но когда-нибудь добавлю регистрацию с паролем.

• Я храню сессии в Redis, потому что мой балансировщик нагрузки использует механизм циклического перебора (round robin) (я знаю, что могу использовать токены, но это сложнее, я хочу сделать это в будущем)

Features

• You can register using oauth2
• You can send messages to another user
• You can see message history

Setup

If you want to run this project You can use docker, but You need to configure postgres and cassandra manually :( (i working on it)

1. open this repo by downloading it and unpacking .zip file or run this command if You have git:

git clone https://github.com/Ord1naryMan/CommTh/ && cd CommTh

2. build docker image:

   docker compose up --build

3. when everything is downloaded You can stop by pressing ctrl + c

4. now u need to go to postgress and cassandra and run this commands:

5. postgres

  docker exec -it commth-db-1 bash -c "psql -U postgres -d chat"

then paste this and press enter:

drop table if exists users;
drop table if exists message;

create table users (
                   id bigserial primary key ,
                   username char(128) not null unique,
                   mail char(128) not null unique
);

create table message (
 message_id uuid not null unique primary key ,
 users_id_from bigint not null,
 users_id_to bigint not null,
 time timestamp not null
);

6. cassandra

  docker exec -it commth-cassandra-1 bash -c "cqlsh -u cassandra -p cassandra"

then paste this and press enter

CREATE KEYSPACE spring_cassandra WITH replication = {'class' : 'SimpleStrategy', 'replication_factor' : 1};

then paste this and press enter

create table spring_cassandra.message_content(id UUID PRIMARY KEY, message_content text);

Now u can run

docker compose up

And this app is running

Sorry

I am really sorry for such setup proccess, i am working on automatisation. If You can help me o nautomatisation it would be really cool :)