/*
 * Copyright 2017-2020 original authors
 *
 * 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
 *
 * https://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.micronaut.reactive.rxjava2;

import io.micronaut.core.annotation.Internal;
import io.micronaut.scheduling.instrument.Instrumentation;
import io.micronaut.scheduling.instrument.InvocationInstrumenter;
import io.reactivex.Flowable;
import io.reactivex.FlowableSubscriber;
import org.reactivestreams.Publisher;
import org.reactivestreams.Subscriber;


Inspired by code in Brave. Provides general instrumentation abstraction for RxJava2.
See https://github.com/openzipkin/brave/tree/master/context/rxjava2/src/main/java/brave/context/rxjava2/internal.
Author:
graemerocher
Type parameters:
<T> – The type
Since:
1.1/**
 * Inspired by code in Brave. Provides general instrumentation abstraction for RxJava2.
 * See https://github.com/openzipkin/brave/tree/master/context/rxjava2/src/main/java/brave/context/rxjava2/internal.
 *
 * @param <T> The type
 * @author graemerocher
 * @since 1.1
 */
@Internal
final class RxInstrumentedFlowable<T> extends Flowable<T> implements RxInstrumentedComponent {
    private final Publisher<T> source;
    private final InvocationInstrumenter instrumenter;

    
Default constructor.
Params:
source –       The source
instrumenter – The instrumenter/**
     * Default constructor.
     *
     * @param source       The source
     * @param instrumenter The instrumenter
     */
    RxInstrumentedFlowable(Publisher<T> source, InvocationInstrumenter instrumenter) {
        this.source = source;
        this.instrumenter = instrumenter;
    }

    @Override
    protected void subscribeActual(Subscriber<? super T> s) {
        if (!(s instanceof FlowableSubscriber)) {
            throw new IllegalArgumentException("Subscriber must be an instance of FlowableSubscriber");
        }
        try (Instrumentation ignored = instrumenter.newInstrumentation()) {
            source.subscribe(s);
        }
    }
}