tweak exports to allow decoupling of backend plugins

Signed-off-by: Brian Fletcher <brian@roadie.io>

plugins/events-backend/api-report.md

@@ -5,6 +5,7 @@
 ```ts
 import { Config } from '@backstage/config';
 import { EventBroker } from '@backstage/plugin-events-node';
+import { EventParams } from '@backstage/plugin-events-node';
 import { EventPublisher } from '@backstage/plugin-events-node';
 import { EventSubscriber } from '@backstage/plugin-events-node';
 import express from 'express';
@@ -42,4 +43,15 @@ export class HttpPostIngressEventPublisher implements EventPublisher {
   // (undocumented)
   setEventBroker(eventBroker: EventBroker): Promise<void>;
 }
+
+// @public
+export class InMemoryEventBroker implements EventBroker {
+  constructor(logger: Logger);
+  // (undocumented)
+  publish(params: EventParams): Promise<void>;
+  // (undocumented)
+  subscribe(
+    ...subscribers: Array<EventSubscriber | Array<EventSubscriber>>
+  ): void;
+}
 ```

plugins/events-backend/src/index.ts

@@ -22,3 +22,4 @@
 
 export { EventsBackend } from './service/EventsBackend';
 export { HttpPostIngressEventPublisher } from './service/http';
+export { InMemoryEventBroker } from './service/InMemoryEventBroker';

plugins/events-backend/src/service/InMemoryEventBroker.ts

@@ -25,6 +25,8 @@ import { Logger } from 'winston';
  * In-memory event broker which will pass the event to all registered subscribers
  * interested in it.
  * Events will not be persisted in any form.
+ *
+ * @public
  */
 // TODO(pjungermann): add prom metrics? (see plugins/catalog-backend/src/util/metrics.ts, etc.)
 export class InMemoryEventBroker implements EventBroker {

plugins/events-backend/src/service/http/HttpPostIngressEventPublisher.ts

@@ -107,7 +107,7 @@ export class HttpPostIngressEventPublisher implements EventPublisher {
         return;
       }
 
-      const eventPayload = request.body;
+      const eventPayload = request;
       await this.eventBroker!.publish({
         topic,
         eventPayload,