org.springframework.security.core.userdetails.MapReactiveUserDetailsService.java Source code

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Here is the source code for org.springframework.security.core.userdetails.MapReactiveUserDetailsService.java

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/*
 * Copyright 2002-2017 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.core.userdetails;

import java.util.Arrays;
import java.util.Collection;
import java.util.Map;
import java.util.function.Function;
import java.util.stream.Collectors;

import org.springframework.util.Assert;
import reactor.core.publisher.Mono;

/**
 * A {@link Map} based implementation of {@link ReactiveUserDetailsService}
 *
 * @author Rob Winch
 * @since 5.0
 */
public class MapReactiveUserDetailsService
        implements ReactiveUserDetailsService, ReactiveUserDetailsPasswordService {
    private final Map<String, UserDetails> users;

    /**
     * Creates a new instance using a {@link Map} that must be non blocking.
     * @param users a {@link Map} of users to use.
     */
    public MapReactiveUserDetailsService(Map<String, UserDetails> users) {
        this.users = users;
    }

    /**
     * Creates a new instance
     * @param users the {@link UserDetails} to use
     */
    public MapReactiveUserDetailsService(UserDetails... users) {
        this(Arrays.asList(users));
    }

    /**
     * Creates a new instance
     * @param users the {@link UserDetails} to use
     */
    public MapReactiveUserDetailsService(Collection<UserDetails> users) {
        Assert.notEmpty(users, "users cannot be null or empty");
        this.users = users.stream()
                .collect(Collectors.toConcurrentMap(u -> getKey(u.getUsername()), Function.identity()));
    }

    @Override
    public Mono<UserDetails> findByUsername(String username) {
        String key = getKey(username);
        UserDetails result = users.get(key);
        return result == null ? Mono.empty() : Mono.just(User.withUserDetails(result).build());
    }

    @Override
    public Mono<UserDetails> updatePassword(UserDetails user, String newPassword) {
        return Mono.just(user).map(u -> User.withUserDetails(u).password(newPassword).build()).doOnNext(u -> {
            String key = getKey(user.getUsername());
            this.users.put(key, u);
        });
    }

    private String getKey(String username) {
        return username.toLowerCase();
    }
}