io.micronaut.reactive.rxjava2.RxInstrumentedSingleObserver 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.SingleObserver;
import io.reactivex.disposables.Disposable;
/**
* 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 RxInstrumentedSingleObserver implements SingleObserver, RxInstrumentedComponent {
private final SingleObserver source;
private final InvocationInstrumenter instrumenter;
/**
* Default constructor.
*
* @param source The source observer
* @param instrumenterFactory The instrumenterFactory
*/
RxInstrumentedSingleObserver(SingleObserver source, RxInstrumenterFactory instrumenterFactory) {
this.source = source;
this.instrumenter = instrumenterFactory.create();
}
@Override
public void onSubscribe(Disposable d) {
if (instrumenter == null) {
source.onSubscribe(d);
} else {
try {
instrumenter.beforeInvocation();
source.onSubscribe(d);
} finally {
instrumenter.afterInvocation(false);
}
}
}
@Override
public void onError(Throwable t) {
if (instrumenter == null) {
source.onError(t);
} else {
try {
instrumenter.beforeInvocation();
source.onError(t);
} finally {
instrumenter.afterInvocation(false);
}
}
}
@Override
public void onSuccess(T value) {
if (instrumenter == null) {
source.onSuccess(value);
} else {
try {
instrumenter.beforeInvocation();
source.onSuccess(value);
} finally {
instrumenter.afterInvocation(false);
}
}
}
}