package com.ruoyi.outpatientvisit.config;
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import com.ruoyi.common.core.service.IConfigService;
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import com.ruoyi.outpatientvisit.OuthospVisitModule;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.beans.factory.ObjectProvider;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Component;
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/**
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* 门急诊随访模块<b>总开关</b>:值存放在 {@code sys_config} 参数配置表中,<b>运行时读取、可热切换</b>。
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*
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* <h3>参数配置</h3>
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* <pre>
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* 参数键名:outpatientvisit.enabled
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* 参数键值:true = 启用(默认)
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* false = 关闭(门诊随访不再生成子任务)
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* </pre>
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*
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* <h3>与出入院模块的开关对齐</h3>
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* 本类与 {@code InhospVisitSwitch} / {@code PublicitySwitch} 是同一套实现
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* (10 秒进程内缓存、fail-open、运行时热读),刻意保持形状一致,便于统一理解与排查。
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*
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* <h3>为什么读不到配置也按 true(fail-open)</h3>
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* 读 {@code sys_config} 要走数据库,数据库抖动时 fail-closed 会让当天门诊随访整体停摆;
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* 而要停随访的正确做法是显式把参数设为 false(或到「定时任务」里暂停对应 job)。
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*/
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@Slf4j
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@Component
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public class OuthospVisitSwitch {
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/**
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* sys_config 里的参数键名(与 {@link OuthospVisitModule#SWITCH_KEY} 保持一致)
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*/
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public static final String CONFIG_KEY = OuthospVisitModule.SWITCH_KEY;
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/**
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* 进程内缓存有效期(毫秒)
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*/
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private static final long CACHE_TTL_MILLIS = 10_000L;
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private final OuthospVisitProperties properties;
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private final ObjectProvider<IConfigService> configServiceProvider;
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private volatile Boolean cachedEnabled;
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private volatile long cachedAt;
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/**
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* Spring 使用的构造器。
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* <p>
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* ⚠️ <b>必须显式标注 {@code @Autowired}</b>:本类有两个公开构造器,
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* 不标注的话 Spring 会因"构造器不唯一"退回查找无参构造器,启动即报
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* {@code No default constructor found}。—— 这是满意度模块实机踩到的坑。
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*/
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@Autowired
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public OuthospVisitSwitch(OuthospVisitProperties properties,
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ObjectProvider<IConfigService> configServiceProvider) {
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this.properties = properties;
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this.configServiceProvider = configServiceProvider;
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}
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/**
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* 供<b>测试/非 Spring 环境</b>直接构造:{@code configValue} 就是 sys_config 里的键值,
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* 传 {@code null} 表示"参数行不存在"(此时回落到 {@link OuthospVisitProperties})。
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*/
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public OuthospVisitSwitch(OuthospVisitProperties properties, final String configValue) {
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this(properties, new FixedProvider(configValue));
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this.cachedEnabled = resolve();
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this.cachedAt = System.currentTimeMillis() + CACHE_TTL_MILLIS * 1000L;
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}
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/**
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* 门诊随访功能是否启用(运行时热读,最多 10 秒延迟)
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*/
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public boolean isEnabled() {
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long now = System.currentTimeMillis();
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Boolean cached = this.cachedEnabled;
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if (cached != null && now - this.cachedAt < CACHE_TTL_MILLIS) {
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return cached;
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}
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boolean resolved = resolve();
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this.cachedEnabled = resolved;
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this.cachedAt = now;
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return resolved;
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}
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/**
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* 清掉进程内缓存,下次调用立即重新读 sys_config(供测试/需要立即生效的场景)
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*/
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public void invalidateCache() {
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this.cachedEnabled = null;
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}
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private boolean resolve() {
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String value = readFromSysConfig();
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if (value != null) {
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if (!"true".equalsIgnoreCase(value) && !"false".equalsIgnoreCase(value)) {
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log.warn("【门急诊随访】sys_config 中 {} 的值不是 true/false(实际=「{}」),将按「不是 false 即启用」处理",
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CONFIG_KEY, value);
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}
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boolean enabled = !"false".equalsIgnoreCase(value);
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log.debug("【门急诊随访】开关取自 sys_config:{}={} -> enabled={}", CONFIG_KEY, value, enabled);
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return enabled;
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}
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boolean enabled = properties.isEnabled();
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log.debug("【门急诊随访】sys_config 中未配置 {},回落 outpatientvisit.enabled={}", CONFIG_KEY, enabled);
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return enabled;
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}
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/**
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* 读 sys_config 的原始键值;没有实现、没有这一行、或读库失败都返回 {@code null}
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*/
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private String readFromSysConfig() {
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if (configServiceProvider == null) {
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return null;
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}
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try {
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IConfigService configService = configServiceProvider.stream().findFirst().orElse(null);
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if (configService == null) {
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return null;
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}
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String value = configService.selectConfigByKey(CONFIG_KEY);
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if (value == null || value.trim().isEmpty()) {
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return null;
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}
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return value.trim();
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} catch (Exception e) {
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log.warn("【门急诊随访】读取 sys_config 的 {} 失败,本次按未配置处理(fail-open):{}",
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CONFIG_KEY, e.toString());
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return null;
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}
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}
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/**
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* 固定值的 {@code ObjectProvider}:只用于非 Spring 环境/测试
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*/
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private static final class FixedProvider implements ObjectProvider<IConfigService> {
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private final IConfigService configService;
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private FixedProvider(final String configValue) {
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this.configService = configValue == null ? null : configKey -> configValue;
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}
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@Override
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public IConfigService getObject(Object... args) {
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return configService;
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}
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@Override
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public IConfigService getIfAvailable() {
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return configService;
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}
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@Override
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public IConfigService getIfUnique() {
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return configService;
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}
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@Override
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public IConfigService getObject() {
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return configService;
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}
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@Override
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public java.util.stream.Stream<IConfigService> stream() {
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return configService == null ? java.util.stream.Stream.empty() : java.util.stream.Stream.of(configService);
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}
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}
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}
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