httpdns 缓存策略，特殊接口获取 httpdns 服务

foudations/httpdns-base/src/main/java/com/mogo/httpdns/HttpDnsConst.java

@@ -1,5 +1,7 @@
 package com.mogo.httpdns;
 
+import androidx.annotation.Keep;
+
 public
 /**
  * @author congtaowang
@@ -7,7 +9,9 @@ public
  *
  * 描述
  */
+@Keep
 class HttpDnsConst {
 
+    @Keep
     public static final String PATH = "/httpdns/api";
 }

foudations/httpdns-base/src/main/java/com/mogo/httpdns/IHttpDnsCallback.java

@@ -0,0 +1,18 @@
+package com.mogo.httpdns;
+
+import androidx.annotation.Keep;
+import androidx.annotation.Nullable;
+
+public
+/**
+ * @author congtaowang
+ * @since 2020/11/19
+ *
+ * dns 解析回调
+ */
+@Keep
+interface IHttpDnsCallback {
+
+    @Keep
+    void onParsed( @Nullable String ip );
+}

foudations/httpdns-base/src/main/java/com/mogo/httpdns/IHttpDnsTtlCallback.java

@@ -0,0 +1,17 @@
+package com.mogo.httpdns;
+
+import androidx.annotation.Keep;
+
+public
+/**
+ * @author congtaowang
+ * @since 2020/11/19
+ *
+ * dns ttl 通知
+ */
+@Keep
+interface IHttpDnsTtlCallback {
+
+    @Keep
+    void onTtl();
+}

foudations/httpdns-base/src/main/java/com/mogo/httpdns/IMogoHttpDns.java

@@ -1,5 +1,8 @@
 package com.mogo.httpdns;
 
+import androidx.annotation.Keep;
+import androidx.annotation.Nullable;
+
 import com.alibaba.android.arouter.facade.template.IProvider;
 import com.mogo.utils.network.HttpDns;
 
@@ -13,9 +16,47 @@ public
  *
  * http 请求做http dns转换
  */
+@Keep
 interface IMogoHttpDns extends IProvider {
 
+    /**
+     * 获取 dns 代理实例
+     *
+     * @return
+     */
+    @Nullable
     HttpDns dns();
 
-    Collection< String > getHttpDnsIps( String host );
+    /**
+     * 获取缓存中的 dns ip地址
+     *
+     * @param host
+     * @return
+     */
+    @Nullable
+    String getCachedHttpDnsIps( String host );
+
+    /**
+     * dns 解析
+     *
+     * @param host     域名
+     * @param useCache 是否使用缓存，是 - 如果没有缓存，则解析新地址、否 - 解析新地址，并将新地址缓存
+     * @param callback
+     */
+    void getHttpDnsIp( String host, boolean useCache, IHttpDnsCallback callback );
+
+    /**
+     * 监听 ttl 回调
+     *
+     * @param host     域名
+     * @param callback
+     */
+    void addHttpDnsTtlCallback( String host, IHttpDnsTtlCallback callback );
+
+    /**
+     * 注销 ttl 回调
+     *
+     * @param host 域名
+     */
+    void removeHttpDnsTtlCallback( String host );
 }

foudations/httpdns-base/src/main/java/com/mogo/httpdns/MogoHttpDnsHandler.java

@@ -0,0 +1,29 @@
+package com.mogo.httpdns;
+
+import androidx.annotation.Keep;
+
+import com.alibaba.android.arouter.launcher.ARouter;
+
+public
+/**
+ * @author congtaowang
+ * @since 2020/11/19
+ *
+ * 描述
+ */
+@Keep
+class MogoHttpDnsHandler {
+
+    private static IMogoHttpDns sHttpDns;
+
+    public static IMogoHttpDns getHttpDnsApi() {
+        if ( sHttpDns == null ) {
+            synchronized ( MogoHttpDnsHandler.class ) {
+                if ( sHttpDns == null ) {
+                    sHttpDns = ARouter.getInstance().navigation( IMogoHttpDns.class );
+                }
+            }
+        }
+        return sHttpDns;
+    }
+}