🆕 #1562企业微信自研应用增加Redisson的存储实现，支持分布式锁

* 企业微信自研应用，增加Redisson的存储实现，支持分布式锁

* 增加redisson的依赖。

Co-authored-by: 袁启勋 <xun.yuan@infoship.cn>

weixin-java-cp/src/main/java/me/chanjar/weixin/cp/api/impl/WxCpServiceImpl.java

@@ -1,12 +1,125 @@
 package me.chanjar.weixin.cp.api.impl;
 
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
+import me.chanjar.weixin.common.WxType;
+import me.chanjar.weixin.common.bean.WxAccessToken;
+import me.chanjar.weixin.common.error.WxError;
+import me.chanjar.weixin.common.error.WxErrorException;
+import me.chanjar.weixin.cp.constant.WxCpApiPathConsts;
+import org.apache.http.client.config.RequestConfig;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.impl.client.BasicResponseHandler;
+import org.apache.http.impl.client.CloseableHttpClient;
+
+import java.io.IOException;
+import java.util.concurrent.locks.Lock;
+
+import static me.chanjar.weixin.cp.constant.WxCpApiPathConsts.GET_AGENT_CONFIG_TICKET;
+import static me.chanjar.weixin.cp.constant.WxCpApiPathConsts.GET_JSAPI_TICKET;
+
 /**
  * <pre>
  *  默认接口实现类，使用apache httpclient实现
  * Created by Binary Wang on 2017-5-27.
  * </pre>
+ * <pre>
+ * 增加分布式锁（基于WxCpConfigStorage实现）的支持
+ * Updated by yuanqixun on 2020-05-13
+ * </pre>
+ *
  *
  * @author <a href="https://github.com/binarywang">Binary Wang</a>
  */
 public class WxCpServiceImpl extends WxCpServiceApacheHttpClientImpl {
+  @Override
+  public String getAccessToken(boolean forceRefresh) throws WxErrorException {
+    if (!getWxCpConfigStorage().isAccessTokenExpired() && !forceRefresh) {
+      return getWxCpConfigStorage().getAccessToken();
+    }
+    Lock lock = getWxCpConfigStorage().getAccessTokenLock();
+    lock.lock();
+    try {
+      // 拿到锁之后，再次判断一下最新的token是否过期，避免重刷
+      if (!getWxCpConfigStorage().isAccessTokenExpired() && !forceRefresh) {
+        return getWxCpConfigStorage().getAccessToken();
+      }
+      String url = String.format(getWxCpConfigStorage().getApiUrl(WxCpApiPathConsts.GET_TOKEN), this.configStorage.getCorpId(), this.configStorage.getCorpSecret());
+      try {
+        HttpGet httpGet = new HttpGet(url);
+        if (getRequestHttpProxy() != null) {
+          RequestConfig config = RequestConfig.custom()
+            .setProxy(getRequestHttpProxy()).build();
+          httpGet.setConfig(config);
+        }
+        String resultContent;
+        try (CloseableHttpClient httpClient = getRequestHttpClient();
+             CloseableHttpResponse response = httpClient.execute(httpGet)) {
+          resultContent = new BasicResponseHandler().handleResponse(response);
+        } finally {
+          httpGet.releaseConnection();
+        }
+        WxError error = WxError.fromJson(resultContent, WxType.CP);
+        if (error.getErrorCode() != 0) {
+          throw new WxErrorException(error);
+        }
+
+        WxAccessToken accessToken = WxAccessToken.fromJson(resultContent);
+        getWxCpConfigStorage().updateAccessToken(accessToken.getAccessToken(), accessToken.getExpiresIn());
+      } catch (IOException e) {
+        throw new RuntimeException(e);
+      }
+    } finally {
+      lock.unlock();
+    }
+    return getWxCpConfigStorage().getAccessToken();
+  }
+
+  @Override
+  public String getAgentJsapiTicket(boolean forceRefresh) throws WxErrorException {
+    if (forceRefresh) {
+      getWxCpConfigStorage().expireAgentJsapiTicket();
+    }
+    if (getWxCpConfigStorage().isAgentJsapiTicketExpired()) {
+      Lock lock = getWxCpConfigStorage().getAgentJsapiTicketLock();
+      lock.lock();
+      try {
+        // 拿到锁之后，再次判断一下最新的token是否过期，避免重刷
+        if (getWxCpConfigStorage().isAgentJsapiTicketExpired()) {
+          String responseContent = this.get(getWxCpConfigStorage().getApiUrl(GET_AGENT_CONFIG_TICKET), null);
+          JsonObject jsonObject = new JsonParser().parse(responseContent).getAsJsonObject();
+          getWxCpConfigStorage().updateAgentJsapiTicket(jsonObject.get("ticket").getAsString(),
+            jsonObject.get("expires_in").getAsInt());
+        }
+      } finally {
+        lock.unlock();
+      }
+    }
+    return getWxCpConfigStorage().getAgentJsapiTicket();
+  }
+
+  @Override
+  public String getJsapiTicket(boolean forceRefresh) throws WxErrorException {
+    if (forceRefresh) {
+      getWxCpConfigStorage().expireJsapiTicket();
+    }
+
+    if (getWxCpConfigStorage().isJsapiTicketExpired()) {
+      Lock lock = getWxCpConfigStorage().getJsapiTicketLock();
+      lock.lock();
+      try {
+        // 拿到锁之后，再次判断一下最新的token是否过期，避免重刷
+        if (getWxCpConfigStorage().isJsapiTicketExpired()) {
+          String responseContent = this.get(getWxCpConfigStorage().getApiUrl(GET_JSAPI_TICKET), null);
+          JsonObject tmpJsonObject = new JsonParser().parse(responseContent).getAsJsonObject();
+          getWxCpConfigStorage().updateJsapiTicket(tmpJsonObject.get("ticket").getAsString(),
+            tmpJsonObject.get("expires_in").getAsInt());
+        }
+      } finally {
+        lock.unlock();
+      }
+    }
+    return getWxCpConfigStorage().getJsapiTicket();
+  }
 }