SelectStrategy (Netty API Reference (4.2.7.Final))

```
public interface SelectStrategy
```
Select strategy interface. Provides the ability to control the behavior of the select loop. For example a blocking select operation can be delayed or skipped entirely if there are events to process immediately.

Field Summary

Fields
Modifier and Type	Field	Description
`static int`	`BUSY_WAIT`	Indicates the IO loop to poll for new events without blocking.
`static int`	`CONTINUE`	Indicates the IO loop should be retried, no blocking select to follow directly.
`static int`	`SELECT`	Indicates a blocking select should follow.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`int`	`calculateStrategy(IntSupplier selectSupplier, boolean hasTasks)`	The `SelectStrategy` can be used to steer the outcome of a potential select call.

- Field Detail
  - SELECT
```
static final int SELECT
```
    Indicates a blocking select should follow.
    
    See Also:
    
    Constant Field Values
  - CONTINUE
```
static final int CONTINUE
```
    Indicates the IO loop should be retried, no blocking select to follow directly.
    
    See Also:
    
    Constant Field Values
  - BUSY_WAIT
```
static final int BUSY_WAIT
```
    Indicates the IO loop to poll for new events without blocking.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - calculateStrategy
```
int calculateStrategy(IntSupplier selectSupplier,
                      boolean hasTasks)
               throws java.lang.Exception
```
    The SelectStrategy can be used to steer the outcome of a potential select call.
    
    Parameters:
    
    selectSupplier - The supplier with the result of a select result.
    
    hasTasks - true if tasks are waiting to be processed.
    
    Returns:
    
    SELECT if the next step should be blocking select CONTINUE if the next step should be to not select but rather jump back to the IO loop and try again. Any value >= 0 is treated as an indicator that work needs to be done.
    
    Throws:
    
    java.lang.Exception