add BaseDns

Author: yangsen

library/src/main/java/com/qiniu/android/http/dns/BaseDns.java

@@ -0,0 +1,12 @@
+package com.qiniu.android.http.dns;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+
+class BaseDns {
+    int timeout = 10;
+    static final ExecutorService executor = new ThreadPoolExecutor(0, 4,
+            60L, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
+}

library/src/main/java/com/qiniu/android/http/dns/HttpDns.java

@@ -15,14 +15,11 @@
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
 
-public class HttpDns implements Dns {
+public class HttpDns extends BaseDns implements Dns {
 
     private IResolver httpIpv4Resolver;
     private IResolver httpIpv6Resolver;
 
-    private static final ExecutorService executor = new ThreadPoolExecutor(0, 4,
-            60L, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
-
     public HttpDns(int timeout) {
         String[] dohIpv4Servers = GlobalConfiguration.getInstance().getDohIpv4Servers();
         if (dohIpv4Servers != null && dohIpv4Servers.length > 0) {

library/src/main/java/com/qiniu/android/http/dns/SystemDns.java

@@ -19,11 +19,7 @@
 /**
  * Created by yangsen on 2020/5/28
  */
-public class SystemDns implements Dns {
-
-    private int timeout = 10;
-    private static final ExecutorService executor = new ThreadPoolExecutor(0, 4,
-            60L, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
+public class SystemDns extends BaseDns implements Dns {
 
     public SystemDns() {
     }

library/src/main/java/com/qiniu/android/http/dns/UdpDns.java

@@ -15,13 +15,10 @@
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
 
-public class UdpDns implements Dns {
+public class UdpDns extends BaseDns implements Dns {
     private IResolver udpIpv4Resolver;
     private IResolver udpIpv6Resolver;
 
-    private static final ExecutorService executor = new ThreadPoolExecutor(0, 4,
-            60L, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
-
     public UdpDns(int timeout) {
         String[] udpIpv4Servers = GlobalConfiguration.getInstance().getUdpDnsIpv4Servers();
         if (udpIpv4Servers != null && udpIpv4Servers.length > 0) {