Events recovery

webapp/src/main/kotlin/org/jeudego/pairgoth/web/Event.kt

@@ -1,6 +1,7 @@
 package org.jeudego.pairgoth.web
 
 import info.macias.sse.events.MessageEvent
+import java.util.concurrent.atomic.AtomicLong
 
 enum class Event {
     tournamentAdded,
@@ -15,8 +16,10 @@ enum class Event {
     ;
 
     companion object {
+        private val nextMessageId = AtomicLong(0)
         private val sse: SSEServlet by lazy { SSEServlet.getInstance() }
         private fun <T> buildEvent(event: Event, data: T) = MessageEvent.Builder()
+            .setId("${nextMessageId.incrementAndGet()}".padStart(10, '0'))
             .setEvent(event.name)
             .setData(data.toString())
             .build()