Top Description Fields Constructors Methods
io.reactivex.internal.operators.observable

public final Class ObservableFromCallable<T>

extends Observable<T>
implements Callable<T>
Class Inheritance
All Implemented Interfaces
java.util.concurrent.Callable
Type Parameters
<T>
the value type
Imports
java.util.concurrent.Callable, io.reactivex.*, io.reactivex.exceptions.Exceptions, io.reactivex.internal.functions.ObjectHelper, io.reactivex.internal.observers.DeferredScalarDisposable, io.reactivex.plugins.RxJavaPlugins

Calls a Callable and emits its resulting single value or signals its exception.

Field Summary

Modifier and TypeField and Description
pack-priv final Callable<? extends T>

Constructor Summary

AccessConstructor and Description
public
ObservableFromCallable(Callable<? extends T> callable)

Method Summary

Modifier and TypeMethod and Description
public T
call()

Implements java.util.concurrent.Callable.call.

Computes a result, or throws an exception if unable to do so.
public void
subscribeActual(Observer<? super T>
the incoming Observer, never null
observer
)

Implements abstract io.reactivex.Observable.subscribeActual.

Operator implementations (both source and intermediate) should implement this method that performs the necessary business logic and handles the incoming Observers.
Inherited from io.reactivex.Observable:
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Field Detail

callableback to summary
pack-priv final Callable<? extends T> callable

Constructor Detail

ObservableFromCallableback to summary
public ObservableFromCallable(Callable<? extends T> callable)

Method Detail

callback to summary
public T call() throws Exception

Implements java.util.concurrent.Callable.call.

Doc from java.util.concurrent.Callable.call.

Computes a result, or throws an exception if unable to do so.

Returns:T

computed result

Annotations
@Override
Exceptions
Exception:
if unable to compute a result
subscribeActualback to summary
public void subscribeActual(Observer<? super T> observer)

Implements abstract io.reactivex.Observable.subscribeActual.

Doc from io.reactivex.Observable.subscribeActual.

Operator implementations (both source and intermediate) should implement this method that performs the necessary business logic and handles the incoming Observers.

There is no need to call any of the plugin hooks on the current Observable instance or the Observer; all hooks and basic safeguards have been applied by subscribe(Observer) before this method gets called.

Parameters
observer:Observer<? super T>

the incoming Observer, never null

Annotations
@Override