DefaultIoEventSizeEstimator

java.lang.Object
- org.apache.mina.filter.executor.DefaultIoEventSizeEstimator

All Implemented Interfaces:

IoEventSizeEstimator
```
public class DefaultIoEventSizeEstimator
extends java.lang.Object
implements IoEventSizeEstimator
```
A default IoEventSizeEstimator implementation.
Martin's Java Notes was used for estimation. For unknown types, it inspects declaring fields of the class of the specified event and the parameter of the event. The size of unknown declaring fields are approximated to the specified averageSizePerField (default: 64).
All the estimated sizes of classes are cached for performance improvement.

Field Summary

Fields
Modifier and Type	Field	Description
`private java.util.concurrent.ConcurrentMap<java.lang.Class<?>,java.lang.Integer>`	`class2size`	A map containing the estimated size of each Java objects we know for

Constructor Summary

Constructors
Constructor Description

DefaultIoEventSizeEstimator()
Create a new instance of this class, injecting the known size of basic java types.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`private static int`	`align(int size)`
`private int`	`estimateSize(java.lang.Class<?> clazz, java.util.Set<java.lang.Class<?>> visitedClasses)`
`int`	`estimateSize(java.lang.Object message)`	Estimate the size of an Object in number of bytes
`int`	`estimateSize(IoEvent event)`	Estimate the IoEvent size in number of bytes

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - class2size
```
private final java.util.concurrent.ConcurrentMap<java.lang.Class<?>,java.lang.Integer> class2size
```
    A map containing the estimated size of each Java objects we know for
- Constructor Detail
  - DefaultIoEventSizeEstimator
```
public DefaultIoEventSizeEstimator()
```
    Create a new instance of this class, injecting the known size of basic java types.
- Method Detail
  - estimateSize
```
public int estimateSize(IoEvent event)
```
    Estimate the IoEvent size in number of bytes
    
    Specified by:
    
    estimateSize in interface IoEventSizeEstimator
    
    Parameters:
    
    event - The event we want to estimate the size of
    
    Returns:
    
    The estimated size of this event
  - estimateSize
```
public int estimateSize(java.lang.Object message)
```
    Estimate the size of an Object in number of bytes
    
    Parameters:
    
    message - The object to estimate
    
    Returns:
    
    The estimated size of the object
  - estimateSize
```
private int estimateSize(java.lang.Class<?> clazz,
                         java.util.Set<java.lang.Class<?>> visitedClasses)
```
  - align
```
private static int align(int size)
```