io.micronaut.reactive.rxjava2.RxInstrumentedMaybe Maven / Gradle / Ivy
/*
* 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
*
* 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.micronaut.reactive.rxjava2;
import io.micronaut.core.annotation.Internal;
import io.micronaut.scheduling.instrument.InvocationInstrumenter;
import io.reactivex.Maybe;
import io.reactivex.MaybeObserver;
import io.reactivex.MaybeSource;
/**
* 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 The type
* @author graemerocher
* @since 1.1
*/
@Internal
final class RxInstrumentedMaybe extends Maybe implements RxInstrumentedComponent {
private final MaybeSource source;
private final InvocationInstrumenter instrumenter;
/**
* Default constructor.
*
* @param source The source
* @param instrumenter The instrumenter
*/
RxInstrumentedMaybe(MaybeSource source, InvocationInstrumenter instrumenter) {
this.source = source;
this.instrumenter = instrumenter;
}
@Override
protected void subscribeActual(MaybeObserver o) {
try {
instrumenter.beforeInvocation();
source.subscribe(o);
} finally {
instrumenter.afterInvocation(false);
}
}
}