[POC] Replaced document-manager by event-sourcing and CQRS

[wachterjohannes]

THIS IS AN EXPERIMENT AND FAR AWAY FROM BEEING PERFECT.

Q	A
Bug fix?	no
New feature?	no
BC breaks?	no
Deprecations?	no
Fixed tickets	none
Related issues/PRs	none
License	MIT

What's in this PR?

This PR wraps the document-manager functionality into a projection for CQRS and Event-Sourcing.

Why?

This could be a replacement for the document-manager. All the functionality which is covered by the document-manager will be moved to an AggregateRoot.

Database Schema

DROP TABLE IF EXISTS `event_streams`;
CREATE TABLE `event_streams` (
  `no` bigint(20) NOT NULL AUTO_INCREMENT,
  `real_stream_name` varchar(150) COLLATE utf8_bin NOT NULL,
  `stream_name` char(41) COLLATE utf8_bin NOT NULL,
  `metadata` json DEFAULT NULL,
  `category` varchar(150) COLLATE utf8_bin DEFAULT NULL,
  PRIMARY KEY (`no`),
  UNIQUE KEY `ix_rsn` (`real_stream_name`),
  KEY `ix_cat` (`category`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin;
 
DROP TABLE IF EXISTS `projections`;
CREATE TABLE `projections` (
  `no` bigint(20) NOT NULL AUTO_INCREMENT,
  `name` varchar(150) COLLATE utf8_bin NOT NULL,
  `position` json DEFAULT NULL,
  `state` json DEFAULT NULL,
  `status` varchar(28) COLLATE utf8_bin NOT NULL,
  `locked_until` char(26) COLLATE utf8_bin DEFAULT NULL,
  PRIMARY KEY (`no`),
  UNIQUE KEY `ix_name` (`name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin;
 
DROP TABLE IF EXISTS `snapshots`;
CREATE TABLE `snapshots` (
  `aggregate_id` varchar(150) COLLATE utf8_bin NOT NULL,
  `aggregate_type` varchar(150) COLLATE utf8_bin NOT NULL,
  `last_version` int(11) NOT NULL,
  `created_at` char(26) COLLATE utf8_bin NOT NULL,
  `aggregate_root` blob,
  UNIQUE KEY `ix_aggregate_id` (`aggregate_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin;

To Do

• Article-Pages

[chirimoya]

ModifyArticle

[chirimoya]

$articleDocumentProjector

[niklasnatter]

Replaced by #553