Add method for connection pool configuration

Author: denis256

ok-http/src/main/java/com/unidev/httpclient/okhttp/OkHttp.java

@@ -1,9 +1,6 @@
 package com.unidev.httpclient.okhttp;
 
-import okhttp3.OkHttpClient;
-import okhttp3.Request;
-import okhttp3.RequestBody;
-import okhttp3.Response;
+import okhttp3.*;
 
 import java.io.IOException;
 import java.net.InetSocketAddress;
@@ -16,7 +13,8 @@
 public class OkHttp {
 
     public static OkHttpClient.Builder builder() {
-        return new OkHttpClient.Builder();
+        OkHttpClient.Builder builder = new OkHttpClient.Builder();
+        return builder;
     }
 
     /**
@@ -26,6 +24,7 @@ public static OkHttpClient.Builder socksProxy(OkHttpClient.Builder builder, Stri
         builder.proxy(new Proxy(Proxy.Type.SOCKS, new InetSocketAddress(ip, port)));
         return builder;
     }
+
     /**
      * Set request timeout in MS
      */
@@ -37,6 +36,9 @@ public static OkHttpClient.Builder timeout(OkHttpClient.Builder builder, int tim
         return builder;
     }
 
+    /**
+     * Configure User Agent
+     */
     public static OkHttpClient.Builder userAgent(OkHttpClient.Builder builder, String userAgent) {
         builder.addNetworkInterceptor(chain -> chain.proceed(
                 chain.request()
@@ -47,6 +49,14 @@ public static OkHttpClient.Builder userAgent(OkHttpClient.Builder builder, Strin
         return builder;
     }
 
+    /**
+     * Set default connection pool
+     */
+    public static OkHttpClient.Builder connectionPool(OkHttpClient.Builder builder, int connections, int keepAliveSeconds) {
+        builder.connectionPool(new ConnectionPool(connections, keepAliveSeconds, TimeUnit.SECONDS));
+        return builder;
+    }
+
     public static OkHttpClient httpClient(OkHttpClient.Builder builder) {
         return new OkHttpClient(builder);
     }
@@ -100,5 +110,4 @@ public String post(String url, RequestBody body) {
     }
 
 
-
 }