com.taotao.cloud.useragent.reactive.ReactiveUserAgentContextHolder Maven / Gradle / Ivy

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/*
 * Copyright (c) 2020-2030, Shuigedeng ([email protected] & https://blog.taotaocloud.top/).
 *
 * 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 com.taotao.cloud.useragent.reactive;

import com.taotao.cloud.useragent.domain.UserAgent;
import java.util.function.Function;
import reactor.core.publisher.Mono;
import reactor.util.context.Context;

/**
 * The type Reactive user agent context holder.
 *
 * @author shuigedeng
 * @version 2023.04
 * @since 2023-06-15 09:20:31
 */
public class ReactiveUserAgentContextHolder {

    private static final Class USER_AGENT_KEY = ReactiveUserAgentContextHolder.class;

    /**
     * Get mono.
     *
     * @return the mono
     */
    public static Mono get() {
        return Mono.deferContextual(Mono::just)
                .cast(Context.class)
                .filter(ReactiveUserAgentContextHolder::hasContext)
                .flatMap(ReactiveUserAgentContextHolder::getContext);
    }

    private static boolean hasContext(Context context) {
        return context.hasKey(USER_AGENT_KEY);
    }

    private static Mono getContext(Context context) {
        return context.>get(USER_AGENT_KEY);
    }

    /**
     * Clear context function.
     *
     * @return the function
     */
    public static Function clearContext() {
        return (context) -> context.delete(USER_AGENT_KEY);
    }

    /**
     * With context context.
     *
     * @param useragentWrapper the useragent wrapper
     * @return the context
     */
    public static Context withContext(Mono useragentWrapper) {
        return Context.of(USER_AGENT_KEY, useragentWrapper);
    }

    /**
     * With context context.
     *
     * @param userAgent the useragent wrapper
     * @return the context
     */
    public static Context withContext(UserAgent userAgent) {
        return withContext(Mono.just(userAgent));
    }
}