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package org.osgi.util.pushstream;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Executor;
class PushStreamBuilderImpl<T, U extends BlockingQueue<PushEvent< ? extends T>>>
extends AbstractBufferBuilder<PushStream<T>,T,U>
implements PushStreamBuilder<T,U> {
private final PushStreamProvider psp;
private final PushEventSource<T> eventSource;
private final Executor previousExecutor;
private boolean unbuffered;
PushStreamBuilderImpl(PushStreamProvider psp, Executor defaultExecutor,
PushEventSource<T> eventSource) {
this.psp = psp;
this.previousExecutor = defaultExecutor;
this.eventSource = eventSource;
this.worker = defaultExecutor;
}
@Override
public PushStreamBuilder<T,U> withBuffer(U queue) {
unbuffered = false;
return (PushStreamBuilder<T,U>) super.withBuffer(queue);
}
@Override
public PushStreamBuilder<T,U> withQueuePolicy(
QueuePolicy<T,U> queuePolicy) {
unbuffered = false;
return (PushStreamBuilder<T,U>) super.withQueuePolicy(queuePolicy);
}
@Override
public PushStreamBuilder<T,U> withQueuePolicy(
QueuePolicyOption queuePolicyOption) {
unbuffered = false;
return (PushStreamBuilder<T,U>) super.withQueuePolicy(
queuePolicyOption);
}
@Override
public PushStreamBuilder<T,U> withPushbackPolicy(
PushbackPolicy<T,U> pushbackPolicy) {
unbuffered = false;
return (PushStreamBuilder<T,U>) super.withPushbackPolicy(
pushbackPolicy);
}
@Override
public PushStreamBuilder<T,U> withPushbackPolicy(
PushbackPolicyOption pushbackPolicyOption, long time) {
unbuffered = false;
return (PushStreamBuilder<T,U>) super.withPushbackPolicy(
pushbackPolicyOption, time);
}
@Override
public PushStreamBuilder<T,U> withParallelism(int parallelism) {
unbuffered = false;
return (PushStreamBuilder<T,U>) super.withParallelism(parallelism);
}
@Override
public PushStreamBuilder<T,U> withExecutor(Executor executor) {
unbuffered = false;
return (PushStreamBuilder<T,U>) super.withExecutor(executor);
}
@Override
public PushStreamBuilder<T,U> unbuffered() {
unbuffered = true;
return this;
}
@Override
public PushStream<T> create() {
if (unbuffered) {
return psp.createUnbufferedStream(eventSource, previousExecutor);
} else {
return psp.createStream(eventSource, concurrency, worker, buffer,
bufferingPolicy, backPressure);
}
}
}
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