Implements #30.
Fixes #29.

Patching of child objects is now handled.

This was broken by refactoring of events.

Tom Käsler authored 6 years ago and Daniel Gerhardt committed 6 years ago

See merge request !96

A new event for full updates has been added.

The entity is now stored in a separate property.

Additionally, roomId is used instead of Room object for legacy
RoomEvents.

@EventListener is used for handler methods instead of implementing
a visitor interface.

* Prefer simple IDs over entity types for method parameters
* Avoid use of obsolete v2 classes in service and repository layers
* Optimize imports

The format for answers is now set based on the content's format.

Tom Käsler authored 6 years ago and Daniel Gerhardt committed 6 years ago

See merge request !94

Migration version now falls back to -1 if no document exists.

A log file path can now be set via `arsnova.log.file` Java system
property. If a log file path is set, the threshold for STDOUT logging is
increased to WARN.

Support for java system properties to tune logging have been added:
* arsnova.log.exceptions
* arsnova.log.level
* arsnova.log.level.root
* arsnova.log.level.spring
* arsnova.log.properties

Tom Käsler authored 7 years ago and Daniel Gerhardt committed 6 years ago

Currently supports finding contents by `roomId`.

Consistently use singular for packages which contain mixed kinds of
classes. Moved a few classes to packages that better fit them.

We now use the format property instead as type ID for Jackson. A custom
TypeIdResolver is used for the mapping.

`skip` has a huge impact on performance and is not intended for
pagination. Bookmarks perform much better.

Additionally, increased socket timeout for migrations.

Additionally, added log warnings for skipped entities.

Before migrations are run we now make sure that the database is empty or
that a MigrationState document exists. If that is not the case,
maintanence mode is activated to prevent data loss.

Startup failed before if no second database for migration was available.

Fixes #19.