WIP Resource event handling
[aquarium] / src / main / scala / gr / grnet / aquarium / actor / service / user / UserActor.scala
index 56f2695..23a9413 100644 (file)
@@ -39,15 +39,18 @@ package user
 
 import gr.grnet.aquarium.actor._
 
-import gr.grnet.aquarium.util.shortClassNameOf
 import akka.config.Supervision.Temporary
 import gr.grnet.aquarium.Aquarium
+import gr.grnet.aquarium.util.{shortClassNameOf, shortNameOfClass}
 import gr.grnet.aquarium.actor.message.event.{ProcessResourceEvent, ProcessIMEvent}
-import gr.grnet.aquarium.actor.message.{GetUserStateRequest, GetUserBalanceRequest}
 import gr.grnet.aquarium.computation.data.IMStateSnapshot
 import gr.grnet.aquarium.event.model.im.IMEventModel
-import gr.grnet.aquarium.computation.NewUserState
 import gr.grnet.aquarium.actor.message.config.{InitializeUserState, ActorProviderConfigured, AquariumPropertiesLoaded}
+import gr.grnet.aquarium.actor.message.{GetUserBalanceResponseData, GetUserBalanceResponse, GetUserStateRequest, GetUserBalanceRequest}
+import gr.grnet.aquarium.computation.{BillingMonthInfo, UserStateBootstrappingData, UserState}
+import gr.grnet.aquarium.util.date.TimeHelpers
+import gr.grnet.aquarium.logic.accounting.Policy
+import gr.grnet.aquarium.computation.reason.InitialUserStateSetup
 
 /**
  *
@@ -55,24 +58,23 @@ import gr.grnet.aquarium.actor.message.config.{InitializeUserState, ActorProvide
  */
 
 class UserActor extends ReflectiveRoleableActor {
+  private[this] var _userID: String = "<?>"
   private[this] var _imState: IMStateSnapshot = _
-//  private[this] var _userState: UserState = _
-//  private[this] var _newUserState: NewUserState = _
+  private[this] var _userState: UserState = _
 
   self.lifeCycle = Temporary
 
-//  private[this] def _userID = this._newUserState.userID
   private[this] def _shutmedown(): Unit = {
-//    if(_haveUserState) {
-//      UserActorCache.invalidate(_userID)
-//    }
+    if(_haveUserState) {
+      UserActorCache.invalidate(_userID)
+    }
 
     self.stop()
   }
 
   override protected def onThrowable(t: Throwable, message: AnyRef) = {
     logChainOfCauses(t)
-//    ERROR(t, "Terminating due to: %s(%s)", shortClassNameOf(t), t.getMessage)
+    ERROR(t, "Terminating due to: %s(%s)", shortClassNameOf(t), t.getMessage)
 
     _shutmedown()
   }
@@ -80,14 +82,15 @@ class UserActor extends ReflectiveRoleableActor {
   def role = UserActorRole
 
   private[this] def aquarium: Aquarium = Aquarium.Instance
+  private[this] def userStateComputations = aquarium.userStateComputations
 
-  private[this] def _timestampTheshold =
+  private[this] def _timestampTheshold = {
     aquarium.props.getLong(Aquarium.Keys.user_state_timestamp_threshold).getOr(10000)
+  }
 
-
-//  private[this] def _haveUserState = {
-//    this._newUserState ne null
-//  }
+  private[this] def _haveUserState = {
+    this._userState ne null
+  }
 
   private[this] def _haveIMState = {
     this._imState ne null
@@ -99,8 +102,11 @@ class UserActor extends ReflectiveRoleableActor {
   def onActorProviderConfigured(event: ActorProviderConfigured): Unit = {
   }
 
-  private[this] def reloadIMState(userID: String): Unit = {
+  private[this] def createIMState(event: InitializeUserState): Unit = {
+    val userID = event.userID
     val store = aquarium.imEventStore
+    // TODO: Optimization: Since IMState only records roles, we should incrementally
+    // TODO:               built it only for those IMEvents that changed the role.
     store.replayIMEventsInOccurrenceOrder(userID) { imEvent ⇒
       logger.debug("Replaying %s".format(imEvent))
 
@@ -109,23 +115,65 @@ class UserActor extends ReflectiveRoleableActor {
           IMStateSnapshot.initial(imEvent)
 
         case currentState ⇒
-          currentState.copyWithEvent(imEvent)
+          currentState.updateHistoryWithEvent(imEvent)
       }
 
       this._imState = newState
     }
 
-    logger.debug("Recomputed %s".format(this._imState))
+    DEBUG("Recomputed %s = %s", shortNameOfClass(classOf[IMStateSnapshot]), this._imState)
   }
 
-  def onInitializeUserState(event: InitializeUserState): Unit = {
-    logger.debug("Got %s".format(event))
-    reloadIMState(event.userID)
+  /**
+   * Resource events are processed only if the user has been activated.
+   */
+  private[this] def shouldProcessResourceEvents: Boolean = {
+    _haveIMState && this._imState.hasBeenActivated
   }
 
-  private[this] def _getAgreementNameForNewUser(imEvent: IMEventModel): String = {
-    // FIXME: Implement based on the role
-    "default"
+  private[this] def createUserState(event: InitializeUserState): Unit = {
+    val userID = event.userID
+    val referenceTime = event.referenceTimeMillis
+
+    if(!_haveIMState) {
+      // Should have been created from `createIMState()`
+      DEBUG("Cannot create user state from %s, since %s = %s", event, shortNameOfClass(classOf[IMStateSnapshot]), this._imState)
+      return
+    }
+
+    if(!this._imState.hasBeenActivated) {
+      // Cannot set the initial state!
+      DEBUG("Cannot create user state from %s, since user is inactive", event)
+      return
+    }
+
+    val userActivationMillis = this._imState.userActivationMillis.get
+    val initialRole = this._imState.roleHistory.firstRole.get.name
+
+    val userStateBootstrap = UserStateBootstrappingData(
+      this._userID,
+      userActivationMillis,
+      initialRole,
+      aquarium.initialAgreementForRole(initialRole, userActivationMillis),
+      aquarium.initialBalanceForRole(initialRole, userActivationMillis)
+    )
+
+    userStateComputations.doFullMonthlyBilling(
+      userStateBootstrap,
+      BillingMonthInfo.fromMillis(TimeHelpers.nowMillis()),
+      aquarium.currentResourcesMap,
+      InitialUserStateSetup,
+      None
+    )
+  }
+
+  def onInitializeUserState(event: InitializeUserState): Unit = {
+    val userID = event.userID
+    this._userID = userID
+    DEBUG("Got %s", event)
+
+    createIMState(event)
+    createUserState(event)
   }
 
   /**
@@ -135,29 +183,53 @@ class UserActor extends ReflectiveRoleableActor {
    */
   def onProcessIMEvent(processEvent: ProcessIMEvent): Unit = {
     val imEvent = processEvent.imEvent
-    val hadIMState = _haveIMState
-
-    if(hadIMState) {
-      if(this._imState.latestIMEvent.id == imEvent.id) {
-        // This happens when the actor is brought to life, then immediately initialized, and then
-        // sent the first IM event. But from the initialization procedure, this IM event will have
-        // already been loaded from DB!
-        logger.debug("Ignoring first %s after birth".format(imEvent.toDebugString))
-        return
-      }
 
-      this._imState = this._imState.copyWithEvent(imEvent)
-    } else {
-      this._imState = IMStateSnapshot.initial(imEvent)
+    if(!_haveIMState) {
+      // This is an error. Should have been initialized from somewhere ...
+      throw new Exception("Got %s while being uninitialized".format(processEvent))
     }
 
-//    DEBUG("%s %s = %s", if(hadIMState) "Update" else "Set", shortClassNameOf(this._imState), this._imState)
+    if(this._imState.latestIMEvent.id == imEvent.id) {
+      // This happens when the actor is brought to life, then immediately initialized, and then
+      // sent the first IM event. But from the initialization procedure, this IM event will have
+      // already been loaded from DB!
+      INFO("Ignoring first %s after birth", imEvent.toDebugString)
+      return
+    }
+
+    this._imState = this._imState.updateHistoryWithEvent(imEvent)
+
+    INFO("Update %s = %s", shortClassNameOf(this._imState), this._imState)
   }
 
+  def onProcessResourceEvent(event: ProcessResourceEvent): Unit = {
+    val rcEvent = event.rcEvent
+
+    if(!shouldProcessResourceEvents) {
+      // This means the user has not been activated. So, we do not process any resource event
+      DEBUG("Not processing %s", rcEvent.toJsonString)
+      return
+    }
+  }
+
+
   def onGetUserBalanceRequest(event: GetUserBalanceRequest): Unit = {
-    val userId = event.userID
-    // FIXME: Implement
-//    self reply GetUserBalanceResponse(userId, Right(_userState.creditsSnapshot.creditAmount))
+    val userID = event.userID
+
+    if(!_haveIMState) {
+      // No IMEvent has arrived, so this user is virtually unknown
+      self reply GetUserBalanceResponse(Left("User not found"), 404/*Not found*/)
+    }
+    else if(!_haveUserState) {
+      // The user is known but we have no state.
+      // Ridiculous. Should have been created at least during initialization.
+    }
+
+    if(!_haveUserState) {
+      self reply GetUserBalanceResponse(Left("Not found"), 404/*Not found*/)
+    } else {
+      self reply GetUserBalanceResponse(Right(GetUserBalanceResponseData(userID, this._userState.totalCredits)))
+    }
   }
 
   def onGetUserStateRequest(event: GetUserStateRequest): Unit = {
@@ -166,35 +238,22 @@ class UserActor extends ReflectiveRoleableActor {
 //    self reply GetUserStateResponse(userId, Right(this._userState))
   }
 
-  def onProcessResourceEvent(event: ProcessResourceEvent): Unit = {
-    val rcEvent = event.rcEvent
+  private[this] def D_userID = {
+    this._userID
+  }
+
+  private[this] def DEBUG(fmt: String, args: Any*) =
+    logger.debug("User[%s]: %s".format(D_userID, fmt.format(args: _*)))
+
+  private[this] def INFO(fmt: String, args: Any*) =
+    logger.info("User[%s]: %s".format(D_userID, fmt.format(args: _*)))
+
+  private[this] def WARN(fmt: String, args: Any*) =
+    logger.warn("User[%s]: %s".format(D_userID, fmt.format(args: _*)))
+
+  private[this] def ERROR(fmt: String, args: Any*) =
+    logger.error("User[%s]: %s".format(D_userID, fmt.format(args: _*)))
 
-    logger.info("Got\n{}", rcEvent.toJsonString)
-  }
-
-
-//  private[this] def D_userID = {
-//    if(this._newUserState eq null)
-//      if(this._imState eq null)
-//        "<NOT INITIALIZED>"
-//      else
-//        this._imState.latestIMEvent.userID
-//    else
-//      this._newUserState.userID
-//  }
-//
-//  private[this] def DEBUG(fmt: String, args: Any*) =
-//    logger.debug("UserActor[%s]: %s".format(D_userID, fmt.format(args: _*)))
-//
-//  private[this] def INFO(fmt: String, args: Any*) =
-//    logger.info("UserActor[%s]: %s".format(D_userID, fmt.format(args: _*)))
-//
-//  private[this] def WARN(fmt: String, args: Any*) =
-//    logger.warn("UserActor[%s]: %s".format(D_userID, fmt.format(args: _*)))
-//
-//  private[this] def ERROR(fmt: String, args: Any*) =
-//    logger.error("UserActor[%s]: %s".format(D_userID, fmt.format(args: _*)))
-//
-//  private[this] def ERROR(t: Throwable, fmt: String, args: Any*) =
-//    logger.error("UserActor[%s]: %s".format(D_userID, fmt.format(args: _*)), t)
+  private[this] def ERROR(t: Throwable, fmt: String, args: Any*) =
+    logger.error("User[%s]: %s".format(D_userID, fmt.format(args: _*)), t)
 }