java.lang.Object
- rx.observers.SerializedObserver<T>

Type Parameters:

T - the type of items expected to be observed by the Observer

All Implemented Interfaces:

Observer<T>
```
public class SerializedObserver<T>
extends java.lang.Object
implements Observer<T>
```
Enforces single-threaded, serialized, ordered execution of onNext(T), onCompleted(), and onError(java.lang.Throwable).
When multiple threads are emitting and/or notifying they will be serialized by:
- Allowing only one thread at a time to emit
- Adding notifications to a queue if another thread is already emitting
- Not holding any locks or blocking any threads while emitting

Nested Class Summary

Nested Classes
Modifier and Type Class Description

(package private) static class SerializedObserver.FastList

Field Summary

Fields
Modifier and Type	Field	Description
`private Observer<? super T>`	`actual`
`private boolean`	`emitting`
`private NotificationLite<T>`	`nl`
`private SerializedObserver.FastList`	`queue`	If not null, it indicates more work.
`private boolean`	`terminated`	Set to true if a terminal event was received.

Constructor Summary

Constructors
Constructor Description

SerializedObserver(Observer<? super T> s)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`onCompleted()`	Notifies the Observer that the `Observable` has finished sending push-based notifications.
`void`	`onError(java.lang.Throwable e)`	Notifies the Observer that the `Observable` has experienced an error condition.
`void`	`onNext(T t)`	Provides the Observer with a new item to observe.

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

- Field Detail
  - actual
```
private final Observer<? super T> actual
```
  - emitting
```
private boolean emitting
```
  - terminated
```
private volatile boolean terminated
```
    Set to true if a terminal event was received.
  - queue
```
private SerializedObserver.FastList queue
```
    If not null, it indicates more work.
  - nl
```
private final NotificationLite<T> nl
```
- Constructor Detail
  - SerializedObserver
```
public SerializedObserver(Observer<? super T> s)
```
- Method Detail
  - onNext
```
public void onNext(T t)
```
    Description copied from interface: Observer
    
    Provides the Observer with a new item to observe.
    The Observable may call this method 0 or more times.
    The Observable will not call this method again after it calls either Observer.onCompleted() or Observer.onError(java.lang.Throwable).
    
    Specified by:
    
    onNext in interface Observer<T>
    
    Parameters:
    
    t - the item emitted by the Observable
  - onError
```
public void onError(java.lang.Throwable e)
```
    Description copied from interface: Observer
    
    Notifies the Observer that the Observable has experienced an error condition.
    If the Observable calls this method, it will not thereafter call Observer.onNext(T) or Observer.onCompleted().
    
    Specified by:
    
    onError in interface Observer<T>
    
    Parameters:
    
    e - the exception encountered by the Observable
  - onCompleted
```
public void onCompleted()
```
    Description copied from interface: Observer
    
    Notifies the Observer that the Observable has finished sending push-based notifications.
    The Observable will not call this method if it calls Observer.onError(java.lang.Throwable).
    
    Specified by:
    
    onCompleted in interface Observer<T>

Class SerializedObserver<T>

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

actual

emitting

terminated

queue

nl

Constructor Detail

SerializedObserver

Method Detail

onNext

onError

onCompleted