All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`addPages(TaskId taskId, List<io.airlift.slice.Slice> pages)`
`void`	`addTask(TaskId taskId)`
`void`	`close()`
`int`	`getBufferedPageCount()`
`long`	`getMaxRetainedSizeInBytes()`
`long`	`getRemainingCapacityInBytes()`
`long`	`getRetainedSizeInBytes()`
`long`	`getSpilledBytes()`
`int`	`getSpilledPageCount()`
`com.google.common.util.concurrent.ListenableFuture<Void>`	`isBlocked()`	This method may be called by multiple independent client concurrently.
`boolean`	`isFailed()`
`boolean`	`isFinished()`
`void`	`noMoreTasks()`
`io.airlift.slice.Slice`	`pollPage()`
`void`	`taskFailed(TaskId taskId, Throwable t)`
`void`	`taskFinished(TaskId taskId)`

isBlocked
```
com.google.common.util.concurrent.ListenableFuture<Void> isBlocked()
```
This method may be called by multiple independent client concurrently. Implementations must ensure the cancellation of a future by one of the clients doesn't cancel futures obtained by other clients.

void addPages(TaskId taskId,
              List<io.airlift.slice.Slice> pages)

void taskFailed(TaskId taskId,
                Throwable t)

Interface DirectExchangeBuffer