java.lang.Object
- java.lang.Enum<Listener.Observation>
- - org.infinispan.notifications.Listener.Observation

All Implemented Interfaces:

Serializable, Comparable<Listener.Observation>

Enclosing class:

Listener
```
public static enum Listener.Observation
extends Enum<Listener.Observation>
```
Enumeration that defines when a listener event can be observed. A listener can receive an event before and/or after an operation has occurred. If the user wishes to be notified just before the operation completes the listener should observe using PRE level. If the user wishes to be notified only after the operation completes the listener should observe using POST level. If the user wishes to have an event before and after they should observe using BOTH level.

Enum Constant Summary

Enum Constants
Enum Constant	Description
`BOTH`	Observation level used to be notified of an operation before and after it occurs
`POST`	Observation level used to only be notified of an operation after it has completed
`PRE`	Observation level used to only be notified of an operation before it completes

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`abstract boolean`	`shouldInvoke(boolean pre)`
`static Listener.Observation`	`valueOf(String name)`	Returns the enum constant of this type with the specified name.
`static Listener.Observation[]`	`values()`	Returns an array containing the constants of this enum type, in the order they are declared.

- Enum Constant Detail
  - PRE
```
public static final Listener.Observation PRE
```
    Observation level used to only be notified of an operation before it completes
  - POST
```
public static final Listener.Observation POST
```
    Observation level used to only be notified of an operation after it has completed
  - BOTH
```
public static final Listener.Observation BOTH
```
    Observation level used to be notified of an operation before and after it occurs
- Method Detail
  - values
```
public static Listener.Observation[] values()
```
    Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
    for (Listener.Observation c : Listener.Observation.values()) System.out.println(c);
    Returns:
    
    an array containing the constants of this enum type, in the order they are declared
  - valueOf
```
public static Listener.Observation valueOf(String name)
```
    Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
    
    Parameters:
    
    name - the name of the enum constant to be returned.
    
    Returns:
    
    the enum constant with the specified name
    
    Throws:
    
    IllegalArgumentException - if this enum type has no constant with the specified name
    
    NullPointerException - if the argument is null
  - shouldInvoke
```
public abstract boolean shouldInvoke(boolean pre)
```

Enum Listener.Observation

Enum Constant Summary

Method Summary

Enum Constant Detail

PRE

POST

BOTH

Method Detail

values

valueOf

shouldInvoke