Support DomaEventHandler

[making]

Pros and Cons compared to org.seasar.doma.jdbc.entity.EntityListener

Pros

• POJO
• Support multiple handlers on one entity
• Support generic handler (ex. Audit Handler on all entities)
• Entity does not need to know the name of listener class
• Can also leverage Spring's @EventListener

Cons

• Need to keep up with Doma
• Ugly hack exists because @Entity with default parameters uses NullEntityListener and forces EntityListenerProvider to provide NullEntityListener instance.

---

Sample project

[making]

Comments are welcome!

[nakamura-to]

Great idea!
I think that it is more useful to make EntityListenerProvider implementation configureable with properties file.

[nakamura-to]

Is it necessary to extend the NullEntityListener class?
You can implement the EntityListener interface directly.

[making]

Here are examples

doma-spring-boot/doma-spring-boot-autoconfigure/src/test/java/org/seasar/doma/boot/event/DomaEventEntityListenerTest.java

Lines 371 to 582 in 71d191a

	@org.seasar.doma.Entity
	public static class Entity {
	}
	@org.seasar.doma.Entity
	public static class Entity2 {
	}
	@DomaEventHandler
	static class PreInsertHandler {
	Entity entity;
	@HandlePreInsert
	public void handlePreInsert(Entity entity) {
	this.entity = entity;
	}
	}
	@DomaEventHandler
	static class PreInsertHandler2 {
	Entity2 entity;
	@HandlePreInsert
	public void handlePreInsert(Entity2 entity) {
	this.entity = entity;
	}
	}
	@DomaEventHandler
	static class PreInsertHandlerWithContext {
	Entity entity;
	PreInsertContext ctx;
	@HandlePreInsert
	public void handlePreInsert(Entity entity, PreInsertContext ctx) {
	this.entity = entity;
	this.ctx = ctx;
	}
	}
	@DomaEventHandler
	static class PreUpdateHandler {
	Entity entity;
	@HandlePreUpdate
	public void handlePreUpdate(Entity entity) {
	this.entity = entity;
	}
	}
	@DomaEventHandler
	static class PreUpdateHandlerWithContext {
	Entity entity;
	PreUpdateContext ctx;
	@HandlePreUpdate
	public void handlePreUpdate(Entity entity, PreUpdateContext ctx) {
	this.entity = entity;
	this.ctx = ctx;
	}
	}
	@DomaEventHandler
	static class PreDeleteHandler {
	Entity entity;
	@HandlePreDelete
	public void handlePreDelete(Entity entity) {
	this.entity = entity;
	}
	}
	@DomaEventHandler
	static class PreDeleteHandlerWithContext {
	Entity entity;
	PreDeleteContext ctx;
	@HandlePreDelete
	public void handlePreDelete(Entity entity, PreDeleteContext ctx) {
	this.entity = entity;
	this.ctx = ctx;
	}
	}
	@DomaEventHandler
	static class PostInsertHandler {
	Entity entity;
	@HandlePostInsert
	public void handlePostInsert(Entity entity) {
	this.entity = entity;
	}
	}
	@DomaEventHandler
	static class PostInsertHandlerWithContext {
	Entity entity;
	PostInsertContext ctx;
	@HandlePostInsert
	public void handlePostInsert(Entity entity, PostInsertContext ctx) {
	this.entity = entity;
	this.ctx = ctx;
	}
	}
	@DomaEventHandler
	static class PostUpdateHandler {
	Entity entity;
	@HandlePostUpdate
	public void handlePostUpdate(Entity entity) {
	this.entity = entity;
	}
	}
	@DomaEventHandler
	static class PostUpdateHandlerWithContext {
	Entity entity;
	PostUpdateContext ctx;
	@HandlePostUpdate
	public void handlePostUpdate(Entity entity, PostUpdateContext ctx) {
	this.entity = entity;
	this.ctx = ctx;
	}
	}
	@DomaEventHandler
	static class PostDeleteHandler {
	Entity entity;
	@HandlePostDelete
	public void handlePostDelete(Entity entity) {
	this.entity = entity;
	}
	}
	@DomaEventHandler
	static class PostDeleteHandlerWithContext {
	Entity entity;
	PostDeleteContext ctx;
	@HandlePostDelete
	public void handlePostDelete(Entity entity, PostDeleteContext ctx) {
	this.entity = entity;
	this.ctx = ctx;
	}
	}
	@DomaEventHandler
	static class PrePostInsertHandler {
	Entity preEntity;
	Entity postEntity;
	@HandlePreInsert
	public void handlePreInsert(Entity entity) {
	this.preEntity = entity;
	}
	@HandlePostInsert
	public void handlePostInsert(Entity entity) {
	this.postEntity = entity;
	}
	}
	@DomaEventHandler
	static class InsertHandler {
	Entity entity;
	@HandlePreInsert
	@HandlePostInsert
	public void handleInsert(Entity entity) {
	this.entity = entity;
	}
	}
	@DomaEventHandler
	static class NoArgHandler {
	@HandlePreInsert
	public void noarg() {
	}
	}
	static class SpringListener {
	DomaEvent event;
	@EventListener
	public void listen(DomaEvent event) {
	this.event = event;
	}
	}
	@org.seasar.doma.Entity
	public static class Todo {
	String createdBy;
	public String getCreatedBy() {
	return createdBy;
	}
	}
	static class TodoListener {
	Todo todo;
	@EventListener(condition = "#root.event.source.createdBy == 'making'")
	public void handlePreInsert(PreInsertEvent<Todo> event) {
	this.todo = event.getSource();
	}
	}