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RxJava/src/main/java/io/reactivex/Completable.java at 2.x · hemanthgit/RxJava · GitHub
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/**
* Copyright (c) 2016-present, RxJava Contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is
* distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
* the License for the specific language governing permissions and limitations under the License.
*/
package
io
.
reactivex
;
import
java
.
util
.
concurrent
.*;
import
org
.
reactivestreams
.
Publisher
;
import
io
.
reactivex
.
annotations
.*;
import
io
.
reactivex
.
disposables
.
Disposable
;
import
io
.
reactivex
.
exceptions
.
Exceptions
;
import
io
.
reactivex
.
functions
.*;
import
io
.
reactivex
.
internal
.
functions
.*;
import
io
.
reactivex
.
internal
.
fuseable
.*;
import
io
.
reactivex
.
internal
.
observers
.*;
import
io
.
reactivex
.
internal
.
operators
.
completable
.*;
import
io
.
reactivex
.
internal
.
operators
.
flowable
.
FlowableDelaySubscriptionOther
;
import
io
.
reactivex
.
internal
.
operators
.
maybe
.*;
import
io
.
reactivex
.
internal
.
operators
.
observable
.
ObservableDelaySubscriptionOther
;
import
io
.
reactivex
.
internal
.
operators
.
single
.
SingleDelayWithCompletable
;
import
io
.
reactivex
.
internal
.
util
.
ExceptionHelper
;
import
io
.
reactivex
.
observers
.
TestObserver
;
import
io
.
reactivex
.
plugins
.
RxJavaPlugins
;
import
io
.
reactivex
.
schedulers
.
Schedulers
;
/**
* Represents a deferred computation without any value but only indication for completion or exception.
*
* The class follows a similar event pattern as Reactive-Streams: onSubscribe (onError|onComplete)?
*/
public
abstract
class
Completable
implements
CompletableSource
{
/**
* Returns a Completable which terminates as soon as one of the source Completables
* terminates (normally or with an error) and cancels all other Completables.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code ambArray} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param sources the array of source Completables. A subscription to each source will
* occur in the same order as in this array.
* @return the new Completable instance
* @throws NullPointerException if sources is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
ambArray
(
final
CompletableSource
...
sources
) {
ObjectHelper
.
requireNonNull
(
sources
,
"sources is null"
);
if
(
sources
.
length
==
0
) {
return
complete
();
}
if
(
sources
.
length
==
1
) {
return
wrap
(
sources
[
0
]);
}
return
RxJavaPlugins
.
onAssembly
(
new
CompletableAmb
(
sources
,
null
));
}
/**
* Returns a Completable which terminates as soon as one of the source Completables
* terminates (normally or with an error) and cancels all other Completables.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code amb} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param sources the array of source Completables. A subscription to each source will
* occur in the same order as in this Iterable.
* @return the new Completable instance
* @throws NullPointerException if sources is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
amb
(
final
Iterable
<?
extends
CompletableSource
>
sources
) {
ObjectHelper
.
requireNonNull
(
sources
,
"sources is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
CompletableAmb
(
null
,
sources
));
}
/**
* Returns a Completable instance that completes immediately when subscribed to.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code complete} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @return a Completable instance that completes immediately
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
complete
() {
return
RxJavaPlugins
.
onAssembly
(
CompletableEmpty
.
INSTANCE
);
}
/**
* Returns a Completable which completes only when all sources complete, one after another.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code concatArray} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param sources the sources to concatenate
* @return the Completable instance which completes only when all sources complete
* @throws NullPointerException if sources is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
concatArray
(
CompletableSource
...
sources
) {
ObjectHelper
.
requireNonNull
(
sources
,
"sources is null"
);
if
(
sources
.
length
==
0
) {
return
complete
();
}
else
if
(
sources
.
length
==
1
) {
return
wrap
(
sources
[
0
]);
}
return
RxJavaPlugins
.
onAssembly
(
new
CompletableConcatArray
(
sources
));
}
/**
* Returns a Completable which completes only when all sources complete, one after another.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code concat} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param sources the sources to concatenate
* @return the Completable instance which completes only when all sources complete
* @throws NullPointerException if sources is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
concat
(
Iterable
<?
extends
CompletableSource
>
sources
) {
ObjectHelper
.
requireNonNull
(
sources
,
"sources is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
CompletableConcatIterable
(
sources
));
}
/**
* Returns a Completable which completes only when all sources complete, one after another.
* <dl>
* <dt><b>Backpressure:</b><dt>
* <dd>The returned {@code Completable} honors the backpressure of the downstream consumer
* and expects the other {@code Publisher} to honor it as well.</dd>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code concat} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param sources the sources to concatenate
* @return the Completable instance which completes only when all sources complete
* @throws NullPointerException if sources is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
@
BackpressureSupport
(
BackpressureKind
.
FULL
)
public
static
Completable
concat
(
Publisher
<?
extends
CompletableSource
>
sources
) {
return
concat
(
sources
,
2
);
}
/**
* Returns a Completable which completes only when all sources complete, one after another.
* <dl>
* <dt><b>Backpressure:</b><dt>
* <dd>The returned {@code Completable} honors the backpressure of the downstream consumer
* and expects the other {@code Publisher} to honor it as well.</dd>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code concat} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param sources the sources to concatenate
* @param prefetch the number of sources to prefetch from the sources
* @return the Completable instance which completes only when all sources complete
* @throws NullPointerException if sources is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
@
BackpressureSupport
(
BackpressureKind
.
FULL
)
public
static
Completable
concat
(
Publisher
<?
extends
CompletableSource
>
sources
,
int
prefetch
) {
ObjectHelper
.
requireNonNull
(
sources
,
"sources is null"
);
ObjectHelper
.
verifyPositive
(
prefetch
,
"prefetch"
);
return
RxJavaPlugins
.
onAssembly
(
new
CompletableConcat
(
sources
,
prefetch
));
}
/**
* Provides an API (via a cold Completable) that bridges the reactive world with the callback-style world.
* <p>
* Example:
* <pre><code>
* Completable.create(emitter -> {
* Callback listener = new Callback() {
* @Override
* public void onEvent(Event e) {
* emitter.onComplete();
* }
*
* @Override
* public void onFailure(Exception e) {
* emitter.onError(e);
* }
* };
*
* AutoCloseable c = api.someMethod(listener);
*
* emitter.setCancellable(c::close);
*
* });
* </code></pre>
* <p>
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code create} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param source the emitter that is called when a CompletableObserver subscribes to the returned {@code Completable}
* @return the new Completable instance
* @see CompletableOnSubscribe
* @see Cancellable
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
create
(
CompletableOnSubscribe
source
) {
ObjectHelper
.
requireNonNull
(
source
,
"source is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
CompletableCreate
(
source
));
}
/**
* Constructs a Completable instance by wrapping the given source callback
* <strong>without any safeguards; you should manage the lifecycle and response
* to downstream cancellation/dispose</strong>.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code unsafeCreate} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param source the callback which will receive the CompletableObserver instances
* when the Completable is subscribed to.
* @return the created Completable instance
* @throws NullPointerException if source is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
unsafeCreate
(
CompletableSource
source
) {
ObjectHelper
.
requireNonNull
(
source
,
"source is null"
);
if
(
source
instanceof
Completable
) {
throw
new
IllegalArgumentException
(
"Use of unsafeCreate(Completable)!"
);
}
return
RxJavaPlugins
.
onAssembly
(
new
CompletableFromUnsafeSource
(
source
));
}
/**
* Defers the subscription to a Completable instance returned by a supplier.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code defer} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param completableSupplier the supplier that returns the Completable that will be subscribed to.
* @return the Completable instance
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
defer
(
final
Callable
<?
extends
CompletableSource
>
completableSupplier
) {
ObjectHelper
.
requireNonNull
(
completableSupplier
,
"completableSupplier"
);
return
RxJavaPlugins
.
onAssembly
(
new
CompletableDefer
(
completableSupplier
));
}
/**
* Creates a Completable which calls the given error supplier for each subscriber
* and emits its returned Throwable.
* <p>
* If the errorSupplier returns null, the child CompletableObservers will receive a
* NullPointerException.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code error} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param errorSupplier the error supplier, not null
* @return the new Completable instance
* @throws NullPointerException if errorSupplier is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
error
(
final
Callable
<?
extends
Throwable
>
errorSupplier
) {
ObjectHelper
.
requireNonNull
(
errorSupplier
,
"errorSupplier is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
CompletableErrorSupplier
(
errorSupplier
));
}
/**
* Creates a Completable instance that emits the given Throwable exception to subscribers.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code error} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param error the Throwable instance to emit, not null
* @return the new Completable instance
* @throws NullPointerException if error is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
error
(
final
Throwable
error
) {
ObjectHelper
.
requireNonNull
(
error
,
"error is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
CompletableError
(
error
));
}
/**
* Returns a Completable instance that runs the given Action for each subscriber and
* emits either an unchecked exception or simply completes.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code fromAction} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param run the runnable to run for each subscriber
* @return the new Completable instance
* @throws NullPointerException if run is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
fromAction
(
final
Action
run
) {
ObjectHelper
.
requireNonNull
(
run
,
"run is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
CompletableFromAction
(
run
));
}
/**
* Returns a Completable which when subscribed, executes the callable function, ignores its
* normal result and emits onError or onComplete only.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code fromCallable} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param callable the callable instance to execute for each subscriber
* @return the new Completable instance
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
fromCallable
(
final
Callable
<?>
callable
) {
ObjectHelper
.
requireNonNull
(
callable
,
"callable is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
CompletableFromCallable
(
callable
));
}
/**
* Returns a Completable instance that reacts to the termination of the given Future in a blocking fashion.
* <p>
* Note that cancellation from any of the subscribers to this Completable will cancel the future.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code fromFuture} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param future the future to react to
* @return the new Completable instance
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
fromFuture
(
final
Future
<?>
future
) {
ObjectHelper
.
requireNonNull
(
future
,
"future is null"
);
return
fromAction
(
Functions
.
futureAction
(
future
));
}
/**
* Returns a Completable instance that runs the given Runnable for each subscriber and
* emits either its exception or simply completes.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code fromRunnable} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param run the runnable to run for each subscriber
* @return the new Completable instance
* @throws NullPointerException if run is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
fromRunnable
(
final
Runnable
run
) {
ObjectHelper
.
requireNonNull
(
run
,
"run is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
CompletableFromRunnable
(
run
));
}
/**
* Returns a Completable instance that subscribes to the given Observable, ignores all values and
* emits only the terminal event.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code fromObservable} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param <T> the type of the Observable
* @param observable the Observable instance to subscribe to, not null
* @return the new Completable instance
* @throws NullPointerException if flowable is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
<
T
>
Completable
fromObservable
(
final
ObservableSource
<
T
>
observable
) {
ObjectHelper
.
requireNonNull
(
observable
,
"observable is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
CompletableFromObservable
<
T
>(
observable
));
}
/**
* Returns a Completable instance that subscribes to the given publisher, ignores all values and
* emits only the terminal event.
* <dl>
* <dt><b>Backpressure:</b><dt>
* <dd>The returned {@code Completable} honors the backpressure of the downstream consumer
* and expects the other {@code Publisher} to honor it as well.</dd>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code fromPublisher} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param <T> the type of the publisher
* @param publisher the Publisher instance to subscribe to, not null
* @return the new Completable instance
* @throws NullPointerException if publisher is null
*/
@
CheckReturnValue
@
BackpressureSupport
(
BackpressureKind
.
UNBOUNDED_IN
)
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
<
T
>
Completable
fromPublisher
(
final
Publisher
<
T
>
publisher
) {
ObjectHelper
.
requireNonNull
(
publisher
,
"publisher is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
CompletableFromPublisher
<
T
>(
publisher
));
}
/**
* Returns a Completable instance that when subscribed to, subscribes to the Single instance and
* emits a completion event if the single emits onSuccess or forwards any onError events.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code fromSingle} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param <T> the value type of the Single
* @param single the Single instance to subscribe to, not null
* @return the new Completable instance
* @throws NullPointerException if single is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
<
T
>
Completable
fromSingle
(
final
SingleSource
<
T
>
single
) {
ObjectHelper
.
requireNonNull
(
single
,
"single is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
CompletableFromSingle
<
T
>(
single
));
}
/**
* Returns a Completable instance that subscribes to all sources at once and
* completes only when all source Completables complete or one of them emits an error.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code mergeArray} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param sources the iterable sequence of sources.
* @return the new Completable instance
* @throws NullPointerException if sources is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
mergeArray
(
CompletableSource
...
sources
) {
ObjectHelper
.
requireNonNull
(
sources
,
"sources is null"
);
if
(
sources
.
length
==
0
) {
return
complete
();
}
else
if
(
sources
.
length
==
1
) {
return
wrap
(
sources
[
0
]);
}
return
RxJavaPlugins
.
onAssembly
(
new
CompletableMergeArray
(
sources
));
}
/**
* Returns a Completable instance that subscribes to all sources at once and
* completes only when all source Completables complete or one of them emits an error.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code merge} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param sources the iterable sequence of sources.
* @return the new Completable instance
* @throws NullPointerException if sources is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
merge
(
Iterable
<?
extends
CompletableSource
>
sources
) {
ObjectHelper
.
requireNonNull
(
sources
,
"sources is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
CompletableMergeIterable
(
sources
));
}
/**
* Returns a Completable instance that subscribes to all sources at once and
* completes only when all source Completables complete or one of them emits an error.
* <dl>
* <dt><b>Backpressure:</b><dt>
* <dd>The returned {@code Completable} honors the backpressure of the downstream consumer
* and expects the other {@code Publisher} to honor it as well.</dd>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code merge} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param sources the iterable sequence of sources.
* @return the new Completable instance
* @throws NullPointerException if sources is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
@
BackpressureSupport
(
BackpressureKind
.
UNBOUNDED_IN
)
public
static
Completable
merge
(
Publisher
<?
extends
CompletableSource
>
sources
) {
return
merge0
(
sources
,
Integer
.
MAX_VALUE
,
false
);
}
/**
* Returns a Completable instance that keeps subscriptions to a limited number of sources at once and
* completes only when all source Completables complete or one of them emits an error.
* <dl>
* <dt><b>Backpressure:</b><dt>
* <dd>The returned {@code Completable} honors the backpressure of the downstream consumer
* and expects the other {@code Publisher} to honor it as well.</dd>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code merge} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param sources the iterable sequence of sources.
* @param maxConcurrency the maximum number of concurrent subscriptions
* @return the new Completable instance
* @throws NullPointerException if sources is null
* @throws IllegalArgumentException if maxConcurrency is less than 1
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
@
BackpressureSupport
(
BackpressureKind
.
FULL
)
public
static
Completable
merge
(
Publisher
<?
extends
CompletableSource
>
sources
,
int
maxConcurrency
) {
return
merge0
(
sources
,
maxConcurrency
,
false
);
}
/**
* Returns a Completable instance that keeps subscriptions to a limited number of sources at once and
* completes only when all source Completables terminate in one way or another, combining any exceptions
* thrown by either the sources Observable or the inner Completable instances.
* <dl>
* <dt><b>Backpressure:</b><dt>
* <dd>The returned {@code Flowable} honors the backpressure of the downstream consumer
* and expects the other {@code Publisher} to honor it as well.
* <dt><b>Scheduler:</b></dt>
* <dd>{@code merge0} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param sources the iterable sequence of sources.
* @param maxConcurrency the maximum number of concurrent subscriptions
* @param delayErrors delay all errors from the main source and from the inner Completables?
* @return the new Completable instance
* @throws NullPointerException if sources is null
* @throws IllegalArgumentException if maxConcurrency is less than 1
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
@
BackpressureSupport
(
BackpressureKind
.
FULL
)
private
static
Completable
merge0
(
Publisher
<?
extends
CompletableSource
>
sources
,
int
maxConcurrency
,
boolean
delayErrors
) {
ObjectHelper
.
requireNonNull
(
sources
,
"sources is null"
);
ObjectHelper
.
verifyPositive
(
maxConcurrency
,
"maxConcurrency"
);
return
RxJavaPlugins
.
onAssembly
(
new
CompletableMerge
(
sources
,
maxConcurrency
,
delayErrors
));
}
/**
* Returns a CompletableConsumable that subscribes to all Completables in the source array and delays
* any error emitted by either the sources observable or any of the inner Completables until all of
* them terminate in a way or another.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code mergeArrayDelayError} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param sources the array of Completables
* @return the new Completable instance
* @throws NullPointerException if sources is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
mergeArrayDelayError
(
CompletableSource
...
sources
) {
ObjectHelper
.
requireNonNull
(
sources
,
"sources is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
CompletableMergeDelayErrorArray
(
sources
));
}
/**
* Returns a Completable that subscribes to all Completables in the source sequence and delays
* any error emitted by either the sources observable or any of the inner Completables until all of
* them terminate in a way or another.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code mergeDelayError} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param sources the sequence of Completables
* @return the new Completable instance
* @throws NullPointerException if sources is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
mergeDelayError
(
Iterable
<?
extends
CompletableSource
>
sources
) {
ObjectHelper
.
requireNonNull
(
sources
,
"sources is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
CompletableMergeDelayErrorIterable
(
sources
));
}
/**
* Returns a Completable that subscribes to all Completables in the source sequence and delays
* any error emitted by either the sources observable or any of the inner Completables until all of
* them terminate in a way or another.
* <dl>
* <dt><b>Backpressure:</b><dt>
* <dd>The returned {@code Completable} honors the backpressure of the downstream consumer
* and expects the other {@code Publisher} to honor it as well.</dd>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code mergeDelayError} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param sources the sequence of Completables
* @return the new Completable instance
* @throws NullPointerException if sources is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
@
BackpressureSupport
(
BackpressureKind
.
UNBOUNDED_IN
)
public
static
Completable
mergeDelayError
(
Publisher
<?
extends
CompletableSource
>
sources
) {
return
merge0
(
sources
,
Integer
.
MAX_VALUE
,
true
);
}
/**
* Returns a Completable that subscribes to a limited number of inner Completables at once in
* the source sequence and delays any error emitted by either the sources
* observable or any of the inner Completables until all of
* them terminate in a way or another.
* <dl>
* <dt><b>Backpressure:</b><dt>
* <dd>The returned {@code Completable} honors the backpressure of the downstream consumer
* and expects the other {@code Publisher} to honor it as well.</dd>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code mergeDelayError} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param sources the sequence of Completables
* @param maxConcurrency the maximum number of concurrent subscriptions to Completables
* @return the new Completable instance
* @throws NullPointerException if sources is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
@
BackpressureSupport
(
BackpressureKind
.
FULL
)
public
static
Completable
mergeDelayError
(
Publisher
<?
extends
CompletableSource
>
sources
,
int
maxConcurrency
) {
return
merge0
(
sources
,
maxConcurrency
,
true
);
}
/**
* Returns a Completable that never calls onError or onComplete.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code never} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @return the singleton instance that never calls onError or onComplete
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
never
() {
return
RxJavaPlugins
.
onAssembly
(
CompletableNever
.
INSTANCE
);
}
/**
* Returns a Completable instance that fires its onComplete event after the given delay elapsed.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code timer} does operate by default on the {@code computation} {@link Scheduler}.</dd>
* </dl>
* @param delay the delay time
* @param unit the delay unit
* @return the new Completable instance
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
COMPUTATION
)
public
static
Completable
timer
(
long
delay
,
TimeUnit
unit
) {
return
timer
(
delay
,
unit
,
Schedulers
.
computation
());
}
/**
* Returns a Completable instance that fires its onComplete event after the given delay elapsed
* by using the supplied scheduler.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code timer} operates on the {@link Scheduler} you specify.</dd>
* </dl>
* @param delay the delay time
* @param unit the delay unit
* @param scheduler the scheduler where to emit the complete event
* @return the new Completable instance
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
CUSTOM
)
public
static
Completable
timer
(
final
long
delay
,
final
TimeUnit
unit
,
final
Scheduler
scheduler
) {
ObjectHelper
.
requireNonNull
(
unit
,
"unit is null"
);
ObjectHelper
.
requireNonNull
(
scheduler
,
"scheduler is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
CompletableTimer
(
delay
,
unit
,
scheduler
));
}
/**
* Creates a NullPointerException instance and sets the given Throwable as its initial cause.
* @param ex the Throwable instance to use as cause, not null (not verified)
* @return the created NullPointerException
*/
private
static
NullPointerException
toNpe
(
Throwable
ex
) {
NullPointerException
npe
=
new
NullPointerException
(
"Actually not, but can't pass out an exception otherwise..."
);
npe
.
initCause
(
ex
);
return
npe
;
}
/**
* Returns a Completable instance which manages a resource along
* with a custom Completable instance while the subscription is active.
* <p>
* This overload disposes eagerly before the terminal event is emitted.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code using} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param <R> the resource type
* @param resourceSupplier the supplier that returns a resource to be managed.
* @param completableFunction the function that given a resource returns a Completable instance that will be subscribed to
* @param disposer the consumer that disposes the resource created by the resource supplier
* @return the new Completable instance
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
<
R
>
Completable
using
(
Callable
<
R
>
resourceSupplier
,
Function
<?
super
R
, ?
extends
CompletableSource
>
completableFunction
,
Consumer
<?
super
R
>
disposer
) {
return
using
(
resourceSupplier
,
completableFunction
,
disposer
,
true
);
}
/**
* Returns a Completable instance which manages a resource along
* with a custom Completable instance while the subscription is active and performs eager or lazy
* resource disposition.
* <p>
* If this overload performs a lazy cancellation after the terminal event is emitted.
* Exceptions thrown at this time will be delivered to RxJavaPlugins only.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code using} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param <R> the resource type
* @param resourceSupplier the supplier that returns a resource to be managed
* @param completableFunction the function that given a resource returns a non-null
* Completable instance that will be subscribed to
* @param disposer the consumer that disposes the resource created by the resource supplier
* @param eager if true, the resource is disposed before the terminal event is emitted, if false, the
* resource is disposed after the terminal event has been emitted
* @return the new Completable instance
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
<
R
>
Completable
using
(
final
Callable
<
R
>
resourceSupplier
,
final
Function
<?
super
R
, ?
extends
CompletableSource
>
completableFunction
,
final
Consumer
<?
super
R
>
disposer
,
final
boolean
eager
) {
ObjectHelper
.
requireNonNull
(
resourceSupplier
,
"resourceSupplier is null"
);
ObjectHelper
.
requireNonNull
(
completableFunction
,
"completableFunction is null"
);
ObjectHelper
.
requireNonNull
(
disposer
,
"disposer is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
CompletableUsing
<
R
>(
resourceSupplier
,
completableFunction
,
disposer
,
eager
));
}
/**
* Wraps the given CompletableSource into a Completable
* if not already Completable.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code wrap} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param source the source to wrap
* @return the source or its wrapper Completable
* @throws NullPointerException if source is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
static
Completable
wrap
(
CompletableSource
source
) {
ObjectHelper
.
requireNonNull
(
source
,
"source is null"
);
if
(
source
instanceof
Completable
) {
return
RxJavaPlugins
.
onAssembly
((
Completable
)
source
);
}
return
RxJavaPlugins
.
onAssembly
(
new
CompletableFromUnsafeSource
(
source
));
}
/**
* Returns a Completable that emits the a terminated event of either this Completable
* or the other Completable whichever fires first.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code ambWith} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param other the other Completable, not null. A subscription to this provided source will occur after subscribing
* to the current source.
* @return the new Completable instance
* @throws NullPointerException if other is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
final
Completable
ambWith
(
CompletableSource
other
) {
ObjectHelper
.
requireNonNull
(
other
,
"other is null"
);
return
ambArray
(
this
,
other
);
}
/**
* Returns an Observable which will subscribe to this Completable and once that is completed then
* will subscribe to the {@code next} ObservableSource. An error event from this Completable will be
* propagated to the downstream subscriber and will result in skipping the subscription of the
* Observable.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code andThen} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param <T> the value type of the next ObservableSource
* @param next the Observable to subscribe after this Completable is completed, not null
* @return Observable that composes this Completable and next
* @throws NullPointerException if next is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
final
<
T
>
Observable
<
T
>
andThen
(
ObservableSource
<
T
>
next
) {
ObjectHelper
.
requireNonNull
(
next
,
"next is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
ObservableDelaySubscriptionOther
<
T
,
Object
>(
next
,
toObservable
()));
}
/**
* Returns a Flowable which will subscribe to this Completable and once that is completed then
* will subscribe to the {@code next} Flowable. An error event from this Completable will be
* propagated to the downstream subscriber and will result in skipping the subscription of the
* Publisher.
* <dl>
* <dt><b>Backpressure:</b><dt>
* <dd>The returned {@code Flowable} honors the backpressure of the downstream consumer
* and expects the other {@code Publisher} to honor it as well.</dd>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code andThen} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param <T> the value type of the next Publisher
* @param next the Publisher to subscribe after this Completable is completed, not null
* @return Flowable that composes this Completable and next
* @throws NullPointerException if next is null
*/
@
CheckReturnValue
@
BackpressureSupport
(
BackpressureKind
.
FULL
)
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
final
<
T
>
Flowable
<
T
>
andThen
(
Publisher
<
T
>
next
) {
ObjectHelper
.
requireNonNull
(
next
,
"next is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
FlowableDelaySubscriptionOther
<
T
,
Object
>(
next
,
toFlowable
()));
}
/**
* Returns a Single which will subscribe to this Completable and once that is completed then
* will subscribe to the {@code next} SingleSource. An error event from this Completable will be
* propagated to the downstream subscriber and will result in skipping the subscription of the
* Single.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code andThen} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
*
* @param <T> the value type of the next SingleSource
* @param next the Single to subscribe after this Completable is completed, not null
* @return Single that composes this Completable and next
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
final
<
T
>
Single
<
T
>
andThen
(
SingleSource
<
T
>
next
) {
ObjectHelper
.
requireNonNull
(
next
,
"next is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
SingleDelayWithCompletable
<
T
>(
next
,
this
));
}
/**
* Returns a {@link Maybe} which will subscribe to this Completable and once that is completed then
* will subscribe to the {@code next} MaybeSource. An error event from this Completable will be
* propagated to the downstream subscriber and will result in skipping the subscription of the
* Maybe.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code andThen} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
*
* @param <T> the value type of the next MaybeSource
* @param next the Maybe to subscribe after this Completable is completed, not null
* @return Maybe that composes this Completable and next
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
final
<
T
>
Maybe
<
T
>
andThen
(
MaybeSource
<
T
>
next
) {
ObjectHelper
.
requireNonNull
(
next
,
"next is null"
);
return
RxJavaPlugins
.
onAssembly
(
new
MaybeDelayWithCompletable
<
T
>(
next
,
this
));
}
/**
* Returns a Completable that first runs this Completable
* and then the other completable.
* <p>
* This is an alias for {@link #concatWith(CompletableSource)}.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code andThen} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param next the other Completable, not null
* @return the new Completable instance
* @throws NullPointerException if other is null
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
final
Completable
andThen
(
CompletableSource
next
) {
return
concatWith
(
next
);
}
/**
* Subscribes to and awaits the termination of this Completable instance in a blocking manner and
* rethrows any exception emitted.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code blockingAwait} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @throws RuntimeException wrapping an InterruptedException if the current thread is interrupted
*/
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
final
void
blockingAwait
() {
BlockingMultiObserver
<
Void
>
observer
=
new
BlockingMultiObserver
<
Void
>();
subscribe
(
observer
);
observer
.
blockingGet
();
}
/**
* Subscribes to and awaits the termination of this Completable instance in a blocking manner
* with a specific timeout and rethrows any exception emitted within the timeout window.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code blockingAwait} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param timeout the timeout value
* @param unit the timeout unit
* @return true if the this Completable instance completed normally within the time limit,
* false if the timeout elapsed before this Completable terminated.
* @throws RuntimeException wrapping an InterruptedException if the current thread is interrupted
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
final
boolean
blockingAwait
(
long
timeout
,
TimeUnit
unit
) {
ObjectHelper
.
requireNonNull
(
unit
,
"unit is null"
);
BlockingMultiObserver
<
Void
>
observer
=
new
BlockingMultiObserver
<
Void
>();
subscribe
(
observer
);
return
observer
.
blockingAwait
(
timeout
,
unit
);
}
/**
* Subscribes to this Completable instance and blocks until it terminates, then returns null or
* the emitted exception if any.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code blockingGet} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @return the throwable if this terminated with an error, null otherwise
* @throws RuntimeException that wraps an InterruptedException if the wait is interrupted
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
final
Throwable
blockingGet
() {
BlockingMultiObserver
<
Void
>
observer
=
new
BlockingMultiObserver
<
Void
>();
subscribe
(
observer
);
return
observer
.
blockingGetError
();
}
/**
* Subscribes to this Completable instance and blocks until it terminates or the specified timeout
* elapses, then returns null for normal termination or the emitted exception if any.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code blockingGet} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param timeout the timeout value
* @param unit the time unit
* @return the throwable if this terminated with an error, null otherwise
* @throws RuntimeException that wraps an InterruptedException if the wait is interrupted or
* TimeoutException if the specified timeout elapsed before it
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
final
Throwable
blockingGet
(
long
timeout
,
TimeUnit
unit
) {
ObjectHelper
.
requireNonNull
(
unit
,
"unit is null"
);
BlockingMultiObserver
<
Void
>
observer
=
new
BlockingMultiObserver
<
Void
>();
subscribe
(
observer
);
return
observer
.
blockingGetError
(
timeout
,
unit
);
}
/**
* Subscribes to this Completable only once, when the first CompletableObserver
* subscribes to the result Completable, caches its terminal event
* and relays/replays it to observers.
* <p>
* Note that this operator doesn't allow disposing the connection
* of the upstream source.
* <dl>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code cache} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* <p>History: 2.0.4 - experimental
* @return the new Completable instance
* @since 2.1
*/
@
CheckReturnValue
@
SchedulerSupport
(
SchedulerSupport
.
NONE
)
public
final
Completable
cache
() {
return
RxJavaPlugins
.
onAssembly
(
new
CompletableCache
(
this
));
}
/**
* Calls the given transformer function with this instance and returns the function's resulting
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