RequestCoordinator (library 4.14.2 API)

All Known Implementing Classes:

ErrorRequestCoordinator, ThumbnailRequestCoordinator
```
public interface RequestCoordinator
```
An interface for coordinating multiple requests with the same Target.
To avoid deadlock, implemenations must not call into individual Requests to determine their state (ie do not call Request.isCleared() or Request.isRunning() etc). Instead use RequestCoordinator.RequestState and the various methods available on this interface and Request to track states manually.

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static class RequestCoordinator.RequestState
A simple state enum to keep track of the states of individual subrequests.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`canNotifyCleared(Request request)`	Returns `true` if the `Request` can clear the `Target`.
`boolean`	`canNotifyStatusChanged(Request request)`	Returns true if the `Request` can display a placeholder.
`boolean`	`canSetImage(Request request)`	Returns true if the `Request` can display a loaded bitmap.
`RequestCoordinator`	`getRoot()`	Returns the top most parent `RequestCoordinator`.
`boolean`	`isAnyResourceSet()`	Returns true if any coordinated `Request` has successfully completed.
`void`	`onRequestFailed(Request request)`	Must be called when a `Request` coordinated by this object fails.
`void`	`onRequestSuccess(Request request)`	Must be called when a `Request` coordinated by this object completes successfully.

- Method Detail
  - canSetImage
```
boolean canSetImage(Request request)
```
    Returns true if the Request can display a loaded bitmap.
    
    Parameters:
    
    request - The Request requesting permission to display a bitmap.
  - canNotifyStatusChanged
```
boolean canNotifyStatusChanged(Request request)
```
    Returns true if the Request can display a placeholder.
    
    Parameters:
    
    request - The Request requesting permission to display a placeholder.
  - canNotifyCleared
```
boolean canNotifyCleared(Request request)
```
    Returns true if the Request can clear the Target.
  - isAnyResourceSet
```
boolean isAnyResourceSet()
```
    Returns true if any coordinated Request has successfully completed.
    
    See Also:
    
    Request.isComplete()
  - onRequestSuccess
```
void onRequestSuccess(Request request)
```
    Must be called when a Request coordinated by this object completes successfully.
  - onRequestFailed
```
void onRequestFailed(Request request)
```
    Must be called when a Request coordinated by this object fails.
  - getRoot
```
RequestCoordinator getRoot()
```
    Returns the top most parent RequestCoordinator.