Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance. Project price only 1 $
You can buy this project and download/modify it how often you want.
/*
* Copyright (c) 2014-2015 by its authors. Some rights reserved.
* See the project homepage at: http://www.monifu.org
*
* 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 monifu.reactive.channels
import monifu.concurrent.Scheduler
import monifu.reactive.OverflowStrategy.WithSignal
import monifu.reactive._
import monifu.reactive.observers.BufferedSubscriber
/**
* Wraps any [[Subject]] into a [[Channel]].
*/
class SubjectChannel[I,+O] private[reactive]
(subject: Subject[I, O], overflowStrategy: OverflowStrategy.Synchronous, onOverflow: Long => I)
(implicit scheduler: Scheduler)
extends ObservableChannel[I,O] {
assert(onOverflow == null || overflowStrategy.isInstanceOf[WithSignal],
"onOverflow is only supported for `OverflowStrategy.WithSignal`")
private[this] val channel =
BufferedSubscriber(subject, overflowStrategy, onOverflow)
final def onSubscribe(subscriber: Subscriber[O]): Unit = {
subject.onSubscribe(subscriber)
}
final def pushNext(elems: I*): Unit = {
for (elem <- elems) channel.observer.onNext(elem)
}
final def pushComplete(): Unit = {
channel.observer.onComplete()
}
final def pushError(ex: Throwable): Unit = {
channel.observer.onError(ex)
}
}
object SubjectChannel {
/**
* Wraps any [[Subject]] into a [[Channel]].
*
* @param strategy - the [[OverflowStrategy overflow strategy]]
* used for buffering, which specifies what to do in case
* we're dealing with slow consumers: should an unbounded
* buffer be used, should back-pressure be applied, should
* the pipeline drop newer or older events, should it drop
* the whole buffer? See [[OverflowStrategy]] for more
* details.
*/
def apply[I,O](subject: Subject[I, O], strategy: OverflowStrategy.Synchronous)
(implicit s: Scheduler): SubjectChannel[I, O] = {
new SubjectChannel[I,O](subject, strategy, null)
}
/**
* Wraps any [[Subject]] into a [[Channel]].
*
* @param strategy - the [[OverflowStrategy overflow strategy]]
* used for buffering, which specifies what to do in case
* we're dealing with slow consumers: should an unbounded
* buffer be used, should back-pressure be applied, should
* the pipeline drop newer or older events, should it drop
* the whole buffer? See [[OverflowStrategy]] for more
* details.
*
* @param onOverflow - a function that is used for signaling a special
* event used to inform the consumers that an overflow event
* happened, function that receives the number of dropped
* events as a parameter (see [[OverflowStrategy.WithSignal]])
*/
def apply[I,O](subject: Subject[I, O], strategy: OverflowStrategy.WithSignal, onOverflow: Long => I)
(implicit s: Scheduler): SubjectChannel[I, O] = {
new SubjectChannel[I,O](subject, strategy, onOverflow)
}
}
