Merge pull request #215 from optimizely/tightenDownEventDispatchInterval

(chore): Tighten down event dispatch interval

Author: jaeopt

CHANGELOG.md

@@ -10,7 +10,7 @@ This modernized version of the SDK is meant to replace the Objective-C SDK.
 ### New Features
 * By default the datafile handler does updates every 10 minutes when the application is in the foreground.  To disable this, set the periodicUpdateInterval to zero.  If you do allow for polling, the project will update automatically when a new datafile change is received. 
 * On top of the above functionality, the developer may register for a datafile change notification.  This notification will be called anytime a new datafile is downloaded to cache and is used to reinitialize the optimizely client automatically.
-* The event handler batches events and will run every 5 minutes in the foreground to send events. 
+* The event handler batches events and will run every minute in the foreground to send events.  If there are no events in the queue it will not reschedule.
 
 ### Bug Fixes:
 

OptimizelySDK/Customization/DefaultEventDispatcher.swift

@@ -28,17 +28,17 @@ open class DefaultEventDispatcher : BackgroundingCallbacks, OPTEventDispatcher {
     static let MAX_FAILURE_COUNT = 3
 
     // default timerInterval
-    var timerInterval:TimeInterval = 60 * 5 // every five minutes
+    var timerInterval:TimeInterval // every minute
     // default batchSize.
     // attempt to send events in batches with batchSize number of events combined
-    var batchSize:Int = 10
+    var batchSize:Int
     // start trimming the front of the queue when we get to over maxQueueSize
     // TODO: implement
     var maxQueueSize:Int = 30000
 
     lazy var logger = OPTLoggerFactory.getLogger()
-    var backingStore:DataStoreType = .file
-    var backingStoreName:String = "OPTEventQueue"
+    var backingStore:DataStoreType
+    var backingStoreName:String
 
     // for dispatching events
     let dispatcher = DispatchQueue(label: "DefaultEventDispatcherQueue")
@@ -47,7 +47,7 @@ open class DefaultEventDispatcher : BackgroundingCallbacks, OPTEventDispatcher {
     // timer as a atomic property.
     var timer:AtomicProperty<Timer> = AtomicProperty<Timer>()
 
-    public init(batchSize:Int = 10, backingStore:DataStoreType = .file, dataStoreName:String = "OPTEventQueue", timerInterval:TimeInterval = 60*5 ) {
+    public init(batchSize:Int = 10, backingStore:DataStoreType = .file, dataStoreName:String = "OPTEventQueue", timerInterval:TimeInterval = 60*1 ) {
         self.batchSize = batchSize > 0 ? batchSize : 1
         self.backingStore = backingStore
         self.backingStoreName = dataStoreName