PriorityTaskManager (ExoPlayer library)

java.lang.Object
- com.google.android.exoplayer2.util.PriorityTaskManager

```
public final class PriorityTaskManager
extends Object
```
Allows tasks with associated priorities to control how they proceed relative to one another.
A task should call add(int) to register with the manager and remove(int) to unregister. A registered task will prevent tasks of lower priority from proceeding, and should call proceed(int), proceedNonBlocking(int) or proceedOrThrow(int) each time it wishes to check whether it is itself allowed to proceed.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static class`	`PriorityTaskManager.PriorityTooLowException`	Thrown when task attempts to proceed when another registered task has a higher priority.

Constructor Summary

Constructors
Constructor Description

PriorityTaskManager()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`add(int priority)`	Register a new task.
`void`	`proceed(int priority)`	Blocks until the task is allowed to proceed.
`boolean`	`proceedNonBlocking(int priority)`	A non-blocking variant of `proceed(int)`.
`void`	`proceedOrThrow(int priority)`	A throwing variant of `proceed(int)`.
`void`	`remove(int priority)`	Unregister a task.

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

- Constructor Detail
  - PriorityTaskManager
```
public PriorityTaskManager()
```
- Method Detail
  - add
```
public void add(int priority)
```
    Register a new task. The task must call remove(int) when done.
    
    Parameters:
    
    priority - The priority of the task. Larger values indicate higher priorities.
  - proceed
```
public void proceed(int priority)
             throws InterruptedException
```
    Blocks until the task is allowed to proceed.
    
    Parameters:
    
    priority - The priority of the task.
    
    Throws:
    
    InterruptedException - If the thread is interrupted.
  - proceedNonBlocking
```
public boolean proceedNonBlocking(int priority)
```
    A non-blocking variant of proceed(int).
    
    Parameters:
    
    priority - The priority of the task.
    
    Returns:
    
    Whether the task is allowed to proceed.
  - proceedOrThrow
```
public void proceedOrThrow(int priority)
                    throws PriorityTaskManager.PriorityTooLowException
```
    A throwing variant of proceed(int).
    
    Parameters:
    
    priority - The priority of the task.
    
    Throws:
    
    PriorityTaskManager.PriorityTooLowException - If the task is not allowed to proceed.
  - remove
```
public void remove(int priority)
```
    Unregister a task.
    
    Parameters:
    
    priority - The priority of the task.