| Package | Description | 
|---|---|
| com.itextpdf.kernel.counter | |
| com.itextpdf.kernel.counter.data | 
| Class and Description | 
|---|
| EventData 
           The data that class that contains event signature (in simple cases it can be just event type) and count. 
          | 
| EventDataHandler 
           This class is intended for some heavy concurrent event operations (like writing to database or file). 
          | 
| Class and Description | 
|---|
| EventData 
           The data that class that contains event signature (in simple cases it can be just event type) and count. 
          | 
| EventDataHandler 
           This class is intended for some heavy concurrent event operations (like writing to database or file). 
          | 
| IEventDataCache 
           Interface responsible for caching  EventData. | 
| IEventDataFactory 
           Interface that is responsible for creating new instance of  EventData. | 
| WaitTime | 
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