RxJava 2 2.2.21 · io.reactivex.internal.subscriptions.SubscriptionHelper

Modifier and Type	Field and Description
public static final SubscriptionHelper	CANCELLED Represents a cancelled Subscription.

Access	Constructor and Description
private	SubscriptionHelper()

Method Summary

Modifier and Type	Method and Description
public void	cancel() Implements org.reactivestreams.Subscription.cancel. Request the `Publisher` to stop sending data and clean up resources.
public static boolean	Returns: true if the swap from the non-cancelled instance to the common cancelled instance happened in the caller's thread (allows further one-time actions). cancel(AtomicReference<Subscription> the target field to dispose the contents of field) Atomically swaps in the common cancelled subscription instance and cancels the previous subscription if any.
public static void	deferredRequest(AtomicReference<Subscription> the target field that may already contain a Subscription field, AtomicLong the current requested amount requested, long the request amount, positive (verified) n) Atomically requests from the Subscription in the field if not null, otherwise accumulates the request amount in the requested field to be requested once the field is set to non-null.
public static boolean	Returns: true if the Subscription was set the first time deferredSetOnce(AtomicReference<Subscription> the target field for the new Subscription field, AtomicLong the current requested amount requested, Subscription the new Subscription, not null (verified) s) Atomically sets the new Subscription on the field and requests any accumulated amount from the requested field.
public static boolean	Returns: true if the operation succeeded, false if the target field holds the `CANCELLED` instance. replace(AtomicReference<Subscription> the target field to set the new subscription on field, Subscription the new subscription s) Atomically sets the subscription on the field but does not cancel the previous subscription.
public static void	reportMoreProduced(long the overproduction amount n) Reports to the plugin error handler that there were more values produced than requested, which is a sign of internal backpressure handling bug.
public static void	reportSubscriptionSet() Reports that the subscription is already set to the RxJavaPlugins error handler, which is an indication of a onSubscribe management bug.
public void	request(long the strictly positive number of elements to requests to the upstream `Publisher` n) Implements org.reactivestreams.Subscription.request. No events will be sent by a `Publisher` until demand is signaled via this method.
public static boolean	Returns: true if the operation succeeded, false if the target field holds the `CANCELLED` instance. set(AtomicReference<Subscription> the target field to set the new subscription on field, Subscription the new subscription s) Atomically sets the subscription on the field and cancels the previous subscription if any.
public static boolean	Returns: true if the operation succeeded, false if the target field was not null. setOnce(AtomicReference<Subscription> the target field field, Subscription the new subscription to set s) Atomically sets the subscription on the field if it is still null.
public static boolean	Returns: true if the operation succeeded, false if the target field was not null. setOnce(AtomicReference<Subscription> the target field field, Subscription the new subscription to set s, long the amount to request, positive (not verified) request) Atomically sets the subscription on the field if it is still null and issues a positive request to the given `Subscription`.
public static boolean	Returns: true if the validation succeeded validate(Subscription the current Subscription, expected to be null current, Subscription the next Subscription, expected to be non-null next) Verifies that current is null, next is not null, otherwise signals errors to the RxJavaPlugins and returns false.
public static boolean	Returns: false if n is non-positive. validate(long the request amount n) Validates that the n is positive.
public static SubscriptionHelper	valueOf(String name)
public static SubscriptionHelper[]	values()

Inherited from java.lang.Enum:: clone compareTo describeConstable equals finalize getDeclaringClass hashCode name ordinal toString valueOf

CANCELLED	back to summary
public static final SubscriptionHelper CANCELLED Represents a cancelled Subscription. Don't leak this instance!

SubscriptionHelper	back to summary
private SubscriptionHelper()

Method Detail

cancel back to summary

cancel	back to summary
public void cancel() Implements org.reactivestreams.Subscription.cancel. Doc from org.reactivestreams.Subscription.cancel. Request the `Publisher` to stop sending data and clean up resources. Data may still be sent to meet previously signalled demand after calling cancel. Annotations @Override

public void cancel()

Implements org.reactivestreams.Subscription.cancel.

Doc from org.reactivestreams.Subscription.cancel.

Request the Publisher to stop sending data and clean up resources.

Data may still be sent to meet previously signalled demand after calling cancel.

Annotations

@Override

cancel	back to summary
public static boolean cancel(AtomicReference<Subscription> field) Atomically swaps in the common cancelled subscription instance and cancels the previous subscription if any. Parameters field:AtomicReference<Subscription> the target field to dispose the contents of Returns:boolean true if the swap from the non-cancelled instance to the common cancelled instance happened in the caller's thread (allows further one-time actions).

cancel

back to summary

public static boolean cancel(AtomicReference<Subscription> field)

Atomically swaps in the common cancelled subscription instance and cancels the previous subscription if any.

Parameters

field:AtomicReference<Subscription>: the target field to dispose the contents of

Returns:boolean

true if the swap from the non-cancelled instance to the common cancelled instance happened in the caller's thread (allows further one-time actions).

deferredRequest	back to summary
public static void deferredRequest(AtomicReference<Subscription> field, AtomicLong requested, long n) Atomically requests from the Subscription in the field if not null, otherwise accumulates the request amount in the requested field to be requested once the field is set to non-null. Parameters field:AtomicReference<Subscription> the target field that may already contain a Subscription requested:AtomicLong the current requested amount n:long the request amount, positive (verified)

deferredRequest

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public static void deferredRequest(AtomicReference<Subscription> field, AtomicLong requested, long n)

Atomically requests from the Subscription in the field if not null, otherwise accumulates the request amount in the requested field to be requested once the field is set to non-null.

Parameters

field:AtomicReference<Subscription>: the target field that may already contain a Subscription
requested:AtomicLong: the current requested amount
n:long: the request amount, positive (verified)

deferredSetOnce	back to summary
public static boolean deferredSetOnce(AtomicReference<Subscription> field, AtomicLong requested, Subscription s) Atomically sets the new Subscription on the field and requests any accumulated amount from the requested field. Parameters field:AtomicReference<Subscription> the target field for the new Subscription requested:AtomicLong the current requested amount s:Subscription the new Subscription, not null (verified) Returns:boolean true if the Subscription was set the first time

deferredSetOnce

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public static boolean deferredSetOnce(AtomicReference<Subscription> field, AtomicLong requested, Subscription s)

Atomically sets the new Subscription on the field and requests any accumulated amount from the requested field.

Parameters

field:AtomicReference<Subscription>: the target field for the new Subscription
requested:AtomicLong: the current requested amount
s:Subscription: the new Subscription, not null (verified)

Returns:boolean

true if the Subscription was set the first time

replace back to summary

replace	back to summary
public static boolean replace(AtomicReference<Subscription> field, Subscription s) Atomically sets the subscription on the field but does not cancel the previous subscription. Parameters field:AtomicReference<Subscription> the target field to set the new subscription on s:Subscription the new subscription Returns:boolean true if the operation succeeded, false if the target field holds the `CANCELLED` instance. See Also `set(AtomicReference, Subscription)`

public static boolean replace(AtomicReference<Subscription> field, Subscription s)

Atomically sets the subscription on the field but does not cancel the previous subscription.

Parameters

field:AtomicReference<Subscription>: the target field to set the new subscription on
s:Subscription: the new subscription

Returns:boolean

true if the operation succeeded, false if the target field holds the CANCELLED instance.

See Also

set(AtomicReference, Subscription)

reportMoreProduced	back to summary
public static void reportMoreProduced(long n) Reports to the plugin error handler that there were more values produced than requested, which is a sign of internal backpressure handling bug. Parameters n:long the overproduction amount

reportMoreProduced

back to summary

public static void reportMoreProduced(long n)

Reports to the plugin error handler that there were more values produced than requested, which is a sign of internal backpressure handling bug.

Parameters

n:long: the overproduction amount

reportSubscriptionSet	back to summary
public static void reportSubscriptionSet() Reports that the subscription is already set to the RxJavaPlugins error handler, which is an indication of a onSubscribe management bug.

request back to summary

request	back to summary
public void request(long n) Implements org.reactivestreams.Subscription.request. Doc from org.reactivestreams.Subscription.request. No events will be sent by a `Publisher` until demand is signaled via this method. It can be called however often and whenever needed—but if the outstanding cumulative demand ever becomes Long.MAX_VALUE or more, it may be treated by the `Publisher` as "effectively unbounded". Whatever has been requested can be sent by the `Publisher` so only signal demand for what can be safely handled. A `Publisher` can send less than is requested if the stream ends but then must emit either `Subscriber#onError(Throwable)` or `Subscriber#onComplete()`. Parameters n:long the strictly positive number of elements to requests to the upstream `Publisher` Annotations @Override

public void request(long n)

Implements org.reactivestreams.Subscription.request.

Doc from org.reactivestreams.Subscription.request.

No events will be sent by a Publisher until demand is signaled via this method.

It can be called however often and whenever needed—but if the outstanding cumulative demand ever becomes Long.MAX_VALUE or more, it may be treated by the Publisher as "effectively unbounded".

Whatever has been requested can be sent by the Publisher so only signal demand for what can be safely handled.

A Publisher can send less than is requested if the stream ends but then must emit either Subscriber#onError(Throwable) or Subscriber#onComplete().

Parameters

n:long: the strictly positive number of elements to requests to the upstream Publisher

Annotations

@Override

set back to summary

set	back to summary
public static boolean set(AtomicReference<Subscription> field, Subscription s) Atomically sets the subscription on the field and cancels the previous subscription if any. Parameters field:AtomicReference<Subscription> the target field to set the new subscription on s:Subscription the new subscription Returns:boolean true if the operation succeeded, false if the target field holds the `CANCELLED` instance. See Also `replace(AtomicReference, Subscription)`

public static boolean set(AtomicReference<Subscription> field, Subscription s)

Atomically sets the subscription on the field and cancels the previous subscription if any.

Parameters

field:AtomicReference<Subscription>: the target field to set the new subscription on
s:Subscription: the new subscription

Returns:boolean

true if the operation succeeded, false if the target field holds the CANCELLED instance.

setOnce back to summary

setOnce	back to summary
public static boolean setOnce(AtomicReference<Subscription> field, Subscription s) Atomically sets the subscription on the field if it is still null. If the field is not null and doesn't contain the `CANCELLED` instance, the `reportSubscriptionSet()` is called. Parameters field:AtomicReference<Subscription> the target field s:Subscription the new subscription to set Returns:boolean true if the operation succeeded, false if the target field was not null.

public static boolean setOnce(AtomicReference<Subscription> field, Subscription s)

Atomically sets the subscription on the field if it is still null.

If the field is not null and doesn't contain the CANCELLED instance, the reportSubscriptionSet() is called.

Parameters

field:AtomicReference<Subscription>: the target field
s:Subscription: the new subscription to set

Returns:boolean

true if the operation succeeded, false if the target field was not null.

setOnce back to summary

setOnce	back to summary
public static boolean setOnce(AtomicReference<Subscription> field, Subscription s, long request) Atomically sets the subscription on the field if it is still null and issues a positive request to the given `Subscription`. If the field is not null and doesn't contain the `CANCELLED` instance, the `reportSubscriptionSet()` is called. Parameters field:AtomicReference<Subscription> the target field s:Subscription the new subscription to set request:long the amount to request, positive (not verified) Returns:boolean true if the operation succeeded, false if the target field was not null. Since 2.1.11

public static boolean setOnce(AtomicReference<Subscription> field, Subscription s, long request)

Atomically sets the subscription on the field if it is still null and issues a positive request to the given Subscription.

If the field is not null and doesn't contain the CANCELLED instance, the reportSubscriptionSet() is called.

Parameters

field:AtomicReference<Subscription>: the target field
s:Subscription: the new subscription to set
request:long: the amount to request, positive (not verified)

Returns:boolean

true if the operation succeeded, false if the target field was not null.

Since

2.1.11

validate	back to summary
public static boolean validate(Subscription current, Subscription next) Verifies that current is null, next is not null, otherwise signals errors to the RxJavaPlugins and returns false. Parameters current:Subscription the current Subscription, expected to be null next:Subscription the next Subscription, expected to be non-null Returns:boolean true if the validation succeeded

validate

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public static boolean validate(Subscription current, Subscription next)

Verifies that current is null, next is not null, otherwise signals errors to the RxJavaPlugins and returns false.

Parameters

current:Subscription: the current Subscription, expected to be null
next:Subscription: the next Subscription, expected to be non-null

Returns:boolean

true if the validation succeeded

validate	back to summary
public static boolean validate(long n) Validates that the n is positive. Parameters n:long the request amount Returns:boolean false if n is non-positive.

validate

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public static boolean validate(long n)

Validates that the n is positive.

Parameters

n:long: the request amount

Returns:boolean

false if n is non-positive.

valueOf	back to summary
public static SubscriptionHelper valueOf(String name)

values	back to summary
public static SubscriptionHelper[] values()

public final Enum SubscriptionHelper

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Field Detail

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