WxJava使用lettuce的redis实现access_token的共享

使用WxJava微信开发时，调用接口获取access_token，如果多个服务部署，就需要使用到缓存来保存access_token以达到重复利用，WxJava 也提供了相关的实现类WxMaRedisConfigImpl，但是这个是基于jedis客户端的实现，最新版本的springboot-redis都开始采用lettuce客户端进行连接了，所以我们只能自己手动实现一个类似于WxMaRedisConfigImpl的类

使用的版本

<dependency><groupId>com.github.binarywang</groupId><artifactId>weixin-java-miniapp</artifactId><version>3.5.0</version>
</dependency>

 WxMaLettuceRedisConfigImpl基于lettuce的工具类

package cn.shiyue.config.ma;import cn.binarywang.wx.miniapp.config.impl.WxMaDefaultConfigImpl;
import org.apache.commons.lang3.ObjectUtils;
import org.springframework.data.redis.core.StringRedisTemplate;import java.util.concurrent.TimeUnit;public class WxMaLettuceRedisConfigImpl extends WxMaDefaultConfigImpl {private StringRedisTemplate stringRedisTemplate;private static final String ACCESS_TOKEN_KEY = "wa:access_token:";private String accessTokenKey;public WxMaLettuceRedisConfigImpl(StringRedisTemplate stringRedisTemplate){this.stringRedisTemplate = stringRedisTemplate;}/*** 每个公众号生成独有的存储key.*/@Overridepublic void setAppid(String appId) {super.setAppid(appId);this.accessTokenKey = ACCESS_TOKEN_KEY.concat(appId);}@Overridepublic String getAccessToken() {return stringRedisTemplate.opsForValue().get(accessTokenKey);}@Overridepublic boolean isAccessTokenExpired() {Long expireTime = stringRedisTemplate.getExpire(accessTokenKey);if (ObjectUtils.isEmpty(expireTime)) {return true;}// 到期时间小于2秒就算作过期了，就重新调用接口获取return expireTime < 2;}@Overridepublic synchronized void updateAccessToken(String accessToken, int expiresInSeconds) {stringRedisTemplate.opsForValue().set(accessTokenKey, accessToken, expiresInSeconds - 200, TimeUnit.SECONDS);}@Overridepublic void expireAccessToken() {stringRedisTemplate.expire(accessTokenKey, 0, TimeUnit.SECONDS);}@Overridepublic long getExpiresTime() {Long expire = stringRedisTemplate.getExpire(accessTokenKey);return expire == null ? 0 : expire;}@Overridepublic void setExpiresTime(long expiresTime) {stringRedisTemplate.expire(accessTokenKey, expiresTime, TimeUnit.SECONDS);}
}

WxMaConfiguration配置

package cn.shiyue.config.ma;import cn.binarywang.wx.miniapp.api.WxMaService;
import cn.binarywang.wx.miniapp.api.impl.WxMaServiceImpl;
import cn.binarywang.wx.miniapp.bean.WxMaKefuMessage;
import cn.binarywang.wx.miniapp.bean.WxMaTemplateData;
import cn.binarywang.wx.miniapp.bean.WxMaTemplateMessage;
import cn.binarywang.wx.miniapp.config.impl.WxMaDefaultConfigImpl;
import cn.binarywang.wx.miniapp.message.WxMaMessageHandler;
import cn.binarywang.wx.miniapp.message.WxMaMessageRouter;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import me.chanjar.weixin.common.bean.result.WxMediaUploadResult;
import me.chanjar.weixin.common.error.WxErrorException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.core.StringRedisTemplate;import javax.annotation.PostConstruct;
import java.io.File;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;@Configuration
@EnableConfigurationProperties(WxMaProperties.class)
public class WxMaConfiguration {private WxMaProperties properties;private static Map<String, WxMaMessageRouter> routers = Maps.newHashMap();private static Map<String, WxMaService> maServices = Maps.newHashMap();// 注入StringRedisTemplate @Autowiredprivate StringRedisTemplate stringRedisTemplate;@Autowiredpublic WxMaConfiguration(WxMaProperties properties) {this.properties = properties;}public static WxMaService getMaService(String appid) {WxMaService wxService = maServices.get(appid);if (wxService == null) {throw new IllegalArgumentException(String.format("未找到对应appid=[%s]的配置，请核实！", appid));}return wxService;}public static WxMaMessageRouter getRouter(String appid) {return routers.get(appid);}@PostConstructpublic void init() {List<WxMaProperties.Config> configs = this.properties.getConfigs();if (configs == null) {throw new RuntimeException("大哥，拜托先看下项目首页的说明（readme文件），添加下相关配置，注意别配错了！");}maServices = configs.stream().map(a -> {// 在当前引用WxMaDefaultConfigImpl config = new WxMaLettuceRedisConfigImpl(stringRedisTemplate);//WxMaDefaultConfigImpl config = new WxMaDefaultConfigImpl ();config.setAppid(a.getAppid());config.setSecret(a.getSecret());config.setToken(a.getToken());config.setAesKey(a.getAesKey());config.setMsgDataFormat(a.getMsgDataFormat());WxMaService service = new WxMaServiceImpl();service.setWxMaConfig(config);routers.put(a.getAppid(), this.newRouter(service));return service;}).collect(Collectors.toMap(s -> s.getWxMaConfig().getAppid(), a -> a));}private WxMaMessageRouter newRouter(WxMaService service) {final WxMaMessageRouter router = new WxMaMessageRouter(service);router.rule().handler(logHandler).next().rule().async(false).content("模板").handler(templateMsgHandler).end().rule().async(false).content("文本").handler(textHandler).end().rule().async(false).content("图片").handler(picHandler).end().rule().async(false).content("二维码").handler(qrcodeHandler).end();return router;}private final WxMaMessageHandler templateMsgHandler = (wxMessage, context, service, sessionManager) ->{service.getMsgService().sendTemplateMsg(WxMaTemplateMessage.builder().templateId("此处更换为自己的模板id").formId("自己替换可用的formid").data(Lists.newArrayList(new WxMaTemplateData("keyword1", "339208499", "#173177"))).toUser(wxMessage.getFromUser()).build());return null;};private final WxMaMessageHandler logHandler = (wxMessage, context, service, sessionManager) -> {System.out.println("收到消息：" + wxMessage.toString());service.getMsgService().sendKefuMsg(WxMaKefuMessage.newTextBuilder().content("收到信息为：" + wxMessage.toJson()).toUser(wxMessage.getFromUser()).build());return null;};private final WxMaMessageHandler textHandler = (wxMessage, context, service, sessionManager) ->{service.getMsgService().sendKefuMsg(WxMaKefuMessage.newTextBuilder().content("回复文本消息").toUser(wxMessage.getFromUser()).build());return null;};private final WxMaMessageHandler picHandler = (wxMessage, context, service, sessionManager) -> {try {WxMediaUploadResult uploadResult = service.getMediaService().uploadMedia("image", "png",ClassLoader.getSystemResourceAsStream("tmp.png"));service.getMsgService().sendKefuMsg(WxMaKefuMessage.newImageBuilder().mediaId(uploadResult.getMediaId()).toUser(wxMessage.getFromUser()).build());} catch (WxErrorException e) {e.printStackTrace();}return null;};private final WxMaMessageHandler qrcodeHandler = (wxMessage, context, service, sessionManager) -> {try {final File file = service.getQrcodeService().createQrcode("123", 430);WxMediaUploadResult uploadResult = service.getMediaService().uploadMedia("image", file);service.getMsgService().sendKefuMsg(WxMaKefuMessage.newImageBuilder().mediaId(uploadResult.getMediaId()).toUser(wxMessage.getFromUser()).build());} catch (WxErrorException e) {e.printStackTrace();}return null;};}

WxMaProperties文件

package cn.shiyue.config.ma;import org.springframework.boot.context.properties.ConfigurationProperties;import java.util.List;@ConfigurationProperties(prefix = "wx.miniapp")
public class WxMaProperties {private List<Config> configs;public static class Config {/*** 设置微信小程序的appid*/private String appid;/*** 设置微信小程序的Secret*/private String secret;/*** 设置微信小程序消息服务器配置的token*/private String token;/*** 设置微信小程序消息服务器配置的EncodingAESKey*/private String aesKey;/*** 消息格式，XML或者JSON*/private String msgDataFormat;public String getAppid() {return appid;}public void setAppid(String appid) {this.appid = appid;}public String getSecret() {return secret;}public void setSecret(String secret) {this.secret = secret;}public String getToken() {return token;}public void setToken(String token) {this.token = token;}public String getAesKey() {return aesKey;}public void setAesKey(String aesKey) {this.aesKey = aesKey;}public String getMsgDataFormat() {return msgDataFormat;}public void setMsgDataFormat(String msgDataFormat) {this.msgDataFormat = msgDataFormat;}}public List<Config> getConfigs() {return configs;}public void setConfigs(List<Config> configs) {this.configs = configs;}
}

 还有一种方式在WxMaConfiguration 文件中配置，这个WxMaRedisBetterConfigImpl类需要高版本的weixin-java-miniapp的jar

@Autowired

private StringRedisTemplate stringRedisTemplate;

// 方式二才需要用上

@Bean

public WxRedisOps getWxRedisOps() {

return new RedisTemplateWxRedisOps(stringRedisTemplate);

}

// 方式一：自己实现一个lettuce的redis配置对象

WxMaDefaultConfigImpl config = new WxMaLettuceRedisConfigImpl(stringRedisTemplate);

// 方式二: 使用wxRedisOps对象来包装redis连接

// WxMaDefaultConfigImpl config = new WxMaRedisBetterConfigImpl(getWxRedisOps(), "wa:access_token:");