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Resilience4j is a lightweight, easy-to-use fault tolerance library designed for Java8 and functional programming

There is a newer version: 2.2.0

/*
 *
 *  Copyright 2017 Robert Winkler, Lucas Lech
 *
 *  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.github.resilience4j.bulkhead.operator;


import io.github.resilience4j.bulkhead.Bulkhead;
import io.reactivex.CompletableObserver;
import io.reactivex.CompletableOperator;
import io.reactivex.FlowableOperator;
import io.reactivex.MaybeObserver;
import io.reactivex.MaybeOperator;
import io.reactivex.ObservableOperator;
import io.reactivex.Observer;
import io.reactivex.SingleObserver;
import io.reactivex.SingleOperator;
import org.reactivestreams.Subscriber;

/**
 * A RxJava operator which wraps a reactive type in a bulkhead.
 *
 * @param  the value type of the upstream and downstream
 */
public class BulkheadOperator implements ObservableOperator, FlowableOperator, SingleOperator, CompletableOperator, MaybeOperator {
    private final Bulkhead bulkhead;

    private BulkheadOperator(Bulkhead bulkhead) {
        this.bulkhead = bulkhead;
    }

    /**
     * Creates a BulkheadOperator.
     *
     * @param       the value type of the upstream and downstream
     * @param bulkhead the Bulkhead
     * @return a BulkheadOperator
     */
    public static  BulkheadOperator of(Bulkhead bulkhead) {
        return new BulkheadOperator<>(bulkhead);
    }

    @Override
    public Subscriber apply(Subscriber childSubscriber) throws Exception {
        return new BulkheadSubscriber<>(bulkhead, childSubscriber);
    }

    @Override
    public Observer apply(Observer childObserver) throws Exception {
        return new BulkheadObserver<>(bulkhead, childObserver);
    }

    @Override
    public SingleObserver apply(SingleObserver childObserver) throws Exception {
        return new BulkheadSingleObserver<>(bulkhead, childObserver);
    }

    @Override
    public CompletableObserver apply(CompletableObserver childObserver) throws Exception {
        return new BulkheadCompletableObserver(bulkhead, childObserver);
    }

    @Override
    public MaybeObserver apply(MaybeObserver childObserver) throws Exception {
        return new BulkheadMaybeObserver<>(bulkhead, childObserver);
    }
}