io.micronaut.reactive.rxjava2.RxInstrumenterFactory 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.context.annotation.Context;
import io.micronaut.context.annotation.Requires;
import io.micronaut.core.annotation.Internal;
import io.micronaut.core.util.CollectionUtils;
import io.micronaut.scheduling.instrument.InvocationInstrumenter;
import io.micronaut.scheduling.instrument.ReactiveInvocationInstrumenterFactory;
import io.reactivex.Flowable;
import edu.umd.cs.findbugs.annotations.Nullable;
import javax.inject.Singleton;
import java.util.ArrayList;
import java.util.List;
/**
* Factory of {@link InvocationInstrumenter} for reactive calls instrumentation.
*
* @author Denis Stepanov
* @since 1.3
*/
@Singleton
@Context
@Requires(classes = Flowable.class)
@Internal
final class RxInstrumenterFactory {
private final List reactiveInvocationInstrumenterFactories;
/**
* @param reactiveInvocationInstrumenterFactories invocation instrumenters
*/
public RxInstrumenterFactory(List reactiveInvocationInstrumenterFactories) {
this.reactiveInvocationInstrumenterFactories = reactiveInvocationInstrumenterFactories;
}
/**
* Check if there are any instumenters present.
*
* @return true if there are any instumenters present
*/
public boolean hasInstrumenters() {
return !reactiveInvocationInstrumenterFactories.isEmpty();
}
/**
* Created a new {@link InvocationInstrumenter}.
*
* @return new {@link InvocationInstrumenter} if instrumentation is required
*/
public @Nullable InvocationInstrumenter create() {
List invocationInstrumenter = getReactiveInvocationInstrumenters();
if (CollectionUtils.isNotEmpty(invocationInstrumenter)) {
return InvocationInstrumenter.combine(invocationInstrumenter);
}
return null;
}
/**
* @return The invocation instrumenters
*/
private List getReactiveInvocationInstrumenters() {
List instrumenters = new ArrayList<>(reactiveInvocationInstrumenterFactories.size());
for (ReactiveInvocationInstrumenterFactory instrumenterFactory : reactiveInvocationInstrumenterFactories) {
final InvocationInstrumenter instrumenter = instrumenterFactory.newReactiveInvocationInstrumenter();
if (instrumenter != null) {
instrumenters.add(instrumenter);
}
}
return instrumenters;
}
}