org.springframework.security.authentication.ReactiveAuthenticationManagerAdapter.java Source code

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Here is the source code for org.springframework.security.authentication.ReactiveAuthenticationManagerAdapter.java

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/*
 * Copyright 2002-2019 the original author or 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 org.springframework.security.authentication;

import org.springframework.security.core.Authentication;
import org.springframework.util.Assert;
import reactor.core.publisher.Mono;
import reactor.core.scheduler.Scheduler;
import reactor.core.scheduler.Schedulers;

/**
 * Adapts an AuthenticationManager to the reactive APIs. This is somewhat necessary because many of the ways that
 * credentials are stored (i.e.  JDBC, LDAP, etc) do not have reactive implementations. What's more is it is generally
 * considered best practice to store passwords in a hash that is intentionally slow which would block ever request
 * from coming in unless it was put on another thread.
 *
 * @author Rob Winch
 * @author Tadaya Tsuyukubo
 * @since 5.0
 */
public class ReactiveAuthenticationManagerAdapter implements ReactiveAuthenticationManager {
    private final AuthenticationManager authenticationManager;

    private Scheduler scheduler = Schedulers.elastic();

    public ReactiveAuthenticationManagerAdapter(AuthenticationManager authenticationManager) {
        Assert.notNull(authenticationManager, "authenticationManager cannot be null");
        this.authenticationManager = authenticationManager;
    }

    @Override
    public Mono<Authentication> authenticate(Authentication token) {
        return Mono.just(token).publishOn(this.scheduler).flatMap(t -> {
            try {
                return Mono.just(authenticationManager.authenticate(t));
            } catch (Throwable error) {
                return Mono.error(error);
            }
        }).filter(a -> a.isAuthenticated());
    }

    /**
     * Set a scheduler that will be published on to perform the authentication logic.
     * @param scheduler a scheduler to be published on
     * @throws IllegalArgumentException if the scheduler is {@code null}
     */
    public void setScheduler(Scheduler scheduler) {
        Assert.notNull(scheduler, "scheduler cannot be null");
        this.scheduler = scheduler;
    }

}