org.springframework.security.authentication.ReactiveAuthenticationManagerAdapter Maven / Gradle / Ivy
/*
* 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 reactor.core.publisher.Mono;
import reactor.core.scheduler.Scheduler;
import reactor.core.scheduler.Schedulers;
import org.springframework.security.core.Authentication;
import org.springframework.util.Assert;
/**
* 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.boundedElastic();
public ReactiveAuthenticationManagerAdapter(AuthenticationManager authenticationManager) {
Assert.notNull(authenticationManager, "authenticationManager cannot be null");
this.authenticationManager = authenticationManager;
}
@Override
public Mono authenticate(Authentication token) {
// @formatter:off
return Mono.just(token)
.publishOn(this.scheduler)
.flatMap(this::doAuthenticate)
.filter(Authentication::isAuthenticated);
// @formatter:on
}
private Mono doAuthenticate(Authentication authentication) {
try {
return Mono.just(this.authenticationManager.authenticate(authentication));
}
catch (Throwable ex) {
return Mono.error(ex);
}
}
/**
* 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;
}
}