Service - Notification Manager

Overview

Consolidates and sends notifications to any number of receiver services. Will be used for user notifications but can have other types of receiver services added. Activities are received from Activity Switchboard service.

Notification groups set whether activities are considated (eg per day/per month/per x number of activities), if considated activities are stored here until sending is triggered, according to the considation rules. If not consolidated they are sent on immediately.

Repository

https://bitbucket.org/izara-core-shared/izara-core-shared-notification-manager

Object Schemas

Additional Information

Per Service Schemas

objType

notificationGroup

• Groups many triggerGroups together

{
  objectType: "notificationGroup",
  canDelete: false,
  storageResources: {
    myGraph: {
      storageType: "graph",
      graphServerTag: "GraphHandler"
    },
    dynamoDB: {
      storageType: "dynamoDB",
      tableName: "NotificationGroupProcessing"
    }
  },
  addOnDataStructure: [
    {
      type: "versionedData",
      versionedDataLabel: "notificationGroupSettings",
      storageResourceTag: "myGraph",
      fieldNames: {
	    "notificationGroupName": {
	      type: "string",
	      requiredOnCreate: true,
	      canUpdate: true,
	      validation: {
	        pattern: pattern
	      }
	    },
	    "consolidatedType": {
	      type: "string",
	      optionalOnCreate: true,
	      requiredOnCreate: false,
	      canUpdate: true,
	      validation: {
	        pattern: pattern
	      }
	    },
	    "consolidatedFrequency": {
	      type: "number",
	      optionalOnCreate: true,
	      requiredOnCreate: false,
	      canUpdate: true,
	      validation: {
	        pattern: pattern
	      }
	    },
	    "consolidatedSendIfEmpty": {
	      type: "boolean",
	      optionalOnCreate: true,
	      requiredOnCreate: false,
	      canUpdate: true,
	      validation: {
	        pattern: pattern
	      }
	    },
	    "consolidatedMessageCount": {
	      type: "number",
	      optionalOnCreate: true,
	      requiredOnCreate: false,
	      canUpdate: true,
	      validation: {
	        pattern: pattern
	      }
    	},
	    "consolidatedConfigs": {
	      type: "array",
    	  optionalOnCreate: true,
    	  requiredOnCreate: false,
    	  canUpdate: true,
	      validation: {
	        pattern: pattern
	      }
    	}
      }
    }
  ],
  fieldNames: {
    notificationGroupId: {
      type: "string",
      randomOnCreate: true,
      canUpdate: false,
      validation: {
	    pattern: pattern
      },
      storageResourceTags: ['myGraph', "dynamoDB"]
    },
    consolidatedLastTimeSent: {
      type: "number",
      optionalOnCreate: true,
      canUpdate: true,
      validation: {
	    pattern: pattern
      },
      storageResourceTags: ["dynamoDB"]
    },
  },	
  identifiers: [
    {
      type: "identifier",
      fieldName: "notificationGroupId"
    }
  ]
}

fieldNames

notificationGroupId (identifier)

comes from: randomOnCreate

consolidatedLastTimeSent

start time for recurring or last time for send consolidated message

notificationGroupName

string name set by user

consolidatedType

none | recurring | messageCount

none is not consolidated, process immediately

recurring process at a specific frequency

messageCount process when a specific number of messages have been received

consolidatedFrequency

for consolidatedType = recurring, number of milliseconds between each processing

consolidatedSendIfEmpty

setting for if have no consolidated message

true = send message out

false = not send message out

consolidatedMessageCount

send a consolidated message when the number of messages reaches

consolidatedConfigs

pattern for message to send data in consolidated message

consolidated

					
{
  objectType: "consolidated",
  canDelete: false,
  storageResources: {
    dynamoDB: {
      storageType: "dynamoDB",
      tableName: "PendingConsolidation"
    }
  },
  fieldNames: {
    notificationGroupId: {
      type: "string",
      canUpdate: false,
      storageResourceTags: ['dynamoDB'],
      fromObjType: {
	    serviceTag: "NotificationManager",
	    objectType: "notificationGroup"
      }
    },
    checkedTriggerTime: {
      type: "string",
      requiredOnCreate: true,
      canUpdate: false,
      validation: {
	    pattern: pattern
      },
      storageResourceTags: ['dynamoDB']
    },
    activityMsg: {
      type: "object",
      requiredOnCreate: true,
      canUpdate: false,
      validation: {
	    pattern: pattern
      },
      storageResourceTags: ['dynamoDB']
    },
    flowTag: {
      type: "string",
      requiredOnCreate: true,
      canUpdate: false,
      validation: {
	    pattern: pattern
      },
      storageResourceTags: ['dynamoDB']
    },
    flowStep: {
      type: "string",
      requiredOnCreate: true,
      canUpdate: false,
      validation: {
	    pattern: pattern
      },
      storageResourceTags: ['dynamoDB']
    }
  },
  identifiers: [
    {
      type: "partitionKey",
      fieldName: "notificationGroupId"
    },
    {
      type: "sortKey",
      fieldName: "checkedTriggerTime"
    }
  ]
}

fieldNames

notificationGroupId (partition key)

comes from: randomOnCreate

checkedTriggerTime (sort key)

comes from {timestamp activity handled in Activity Switchboard}_{small random UUID}

adding the UUID to ensure no clashing records with the same timestamp and notificationGroupId

activityMsg

the message delivered from Activity Switchboard

flowTag

defines the consolidated configuration for the notification group

flowType

defines the consolidated configuration for the notification group

Object Relationships

ownsNotificationGroup

{
  "ownsNotificationGroup": {
     fieldNames: {
       "originTimestamp": {
	     type: "number",
	     requiredOnCreate: true,  	// default = false
	    canUpdate: true,          	// default = true
	    validation: {}            	// ajv syntax
      }
    },
    storageResources: {
      myGraph: {
	    storageType: "graph",
	    graphServerTag: "GraphHandler"
      }
    },
    links: [
      {
	    storageResourceTags: ["myGraph"],
	    from: {
	      objType: {
	        serviceTag: "UserAccount",
	        objectType: "user"
	      },
	      linkType: "one",
	    },
	    to: {
	      objType: {
	        serviceTag: "NotificationManager",
	        objectType: "notificationGroup"
	      },
	      requiredOnCreate: true,
	      linkType: "many",
	      handler: true
	    }
      }
    ]
  }
}

links the user to their created notification group

hasTriggerGroup

{
  "hasTriggerGroup": {
    canChangeToRelTypes: [
      {
	    serviceTag: "NotificationManager",
	    relationshipTag: "disabledTriggerGroup"
      }
    ],
    fieldNames: {
      "originTimestamp": {
	    type: "number",            	// "string" | "number" ...
	    requiredOnCreate: true,  	// default = false
	    canUpdate: true,          	// default = true
	    validation: {}            	// ajv syntax
      }
    },
    storageResources: {
      myGraph: {
	    storageType: "graph",
	    graphServerTag: "GraphHandler"
      }
    },
    links: [
      {
	    storageResourceTags: ["myGraph"],
	    from: {
	      objType: {
	        serviceTag: "NotificationManager",
	        objectType: "notificationGroup"
    	  },
	      linkType: "many",
	      handler: true
    	},
	    to: {
	      objType: {
	        serviceTag: "ActivitySwitchboard",
	        objectType: "triggerGroup"
	      },
	      linkType: "many"
    	}
      }
    ]
  }
}

disabledTriggerGroup

{
  "disabledTriggerGroup": {
    canChangeToRelTypes: [
      {
	    serviceTag: "NotificationManager",
	    relationshipTag: "hasTriggerGroup"
      }
    ],
    fieldNames: {
      "originTimestamp": {
	    type: "number",            	// "string" | "number" ...
	    requiredOnCreate: true,  	// default = false
	    canUpdate: true,          	// default = true
	    validation: {}            	// ajv syntax
      }
    },
    storageResources: {
      myGraph: {
	    storageType: "graph",
	    graphServerTag: "GraphHandler"
      }
    },
    links: [
      {
	    storageResourceTags: ["myGraph"],
	    from: {
	      objType: {
	        serviceTag: "NotificationManager",
	        objectType: "notificationGroup"
	      },
	      linkType: "many",
	      handler: true
	    },
	    to: {
	      objType: {
	        serviceTag: "ActivitySwitchboard",
	        objectType: "triggerGroup"
	      },
	      linkType: "many"
    	}
      }
    ]
  }
}

value or values array

• Either 'value' or 'values' should be set, not both, if 'values' is used it means any of the elements in the 'values' array can match.

• To achieve this on Activity Switchboard a new trigger group is created for each element, each activity group has the full list of other triggers, and one option from this trigger's values array. If a notification has multiple values type triggers than a new trigger group on Activity Switchboard is created for each combination.

• "serviceName" and "topicName" valueTypes do not have propertyName

serviceName and topicName triggers

• Notifications do not have to set their serviceName and/or topicName, if not set then any message that matches the properties will pass
• Can set only the serviceName, then any message that passess the properties and is from that serviceName passes
• Can set serviceName+topicName, then only messages in that topic will pass
• serviceName and topicName can both be submitted as "values" array, creating multiple trigger groups for each combination

Consolidated notifications

How to trigger processing for time based consolidations

• ....
• maybe can use some sort of queue to store a list of NotificationGroup’s that are due to be sent (either because consolidatedSendIfEmpty == true or there are some activities waiting to be processed)

Formating the notification body

• Initially the format will be hardwired and simple, but in the future we could create templates for formating the notification body
• The notificationBody is currently sent to receiver as a JSON stringified object containing all activityMsgs

Ideas

• overview notifications currently count per notification, but could be extended to do aggregates on a per notification, per field level
• If set to overview maybe can store just aggregate/s needed for the consolidated notification, at the moment store entire messages, create the overview once when sending notification

Working documents

Working documents - Notification Manager