Add 'Duration' as flavor to configure TTL

docs/index.md

@@ -514,6 +514,7 @@ Changing Unirest's config should ideally be done once, or rarely. There are seve
 | ```clientCertificateStore(String,String)``` | Add a PKCS12 KeyStore by path for doing client certificates |  |
 | ```clientCertificateStore(KeyStore,String)``` | Add a PKCS12 KeyStore for doing client certificates |  |
 | ```connectionTTL(long,TimeUnit)``` | Total time to live (TTL)  defines maximum life span of persistent connections regardless of their expiration setting. No persistent connection will be re-used past its TTL value.| -1  |
+| ```connectionTTL(Duration)``` | Add total time to live (TTL) by [Duration](https://docs.oracle.com/javase/8/docs/api/java/time/Duration.html). Good for moderns Java APIs. | -1  |
 | ```errorHandler(Consumer<HttpResponse<?>> consumer)``` | Set a global error handler that will be invoked for any status > 400 or a parsing error | | 
 | ```interceptor(Interceptor value)``` | Set a global Interceptor handler that will be invoked before and after each request | | 
 | ```hostNameVerifier(HostNameVerifier value)``` | Set a custom HostNameVerifier for the security configuration | DefaultHostNameVerifier | 

unirest/src/main/java/kong/unirest/Config.java

@@ -36,6 +36,7 @@
 import java.io.InputStream;
 import java.nio.charset.StandardCharsets;
 import java.security.KeyStore;
+import java.time.Duration;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
@@ -561,6 +562,20 @@ public Config connectionTTL(long duration, TimeUnit unit) {
         return this;
     }
 
+
+    /**
+     * Sugar!
+     * Total time to live (TTL)  defines maximum life span of persistent connections regardless of their expiration setting.
+     * No persistent connection will be re-used past its TTL value.
+     *
+     * @param duration of ttl.
+     * @return this config object
+     */
+    public Config connectionTTL(Duration duration){
+        this.ttl = duration.toMillis();
+        return this;
+    }
+
     /**
      * Register the client with a system shutdown hook. Note that this creates up to two threads
      * (depending on if you use both sync and async clients). default is false

unirest/src/test/java/kong/unirest/ConfigTest.java

@@ -35,8 +35,6 @@
 import org.apache.http.impl.nio.client.CloseableHttpAsyncClient;
 import org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager;
 import org.apache.http.nio.client.HttpAsyncClient;
-import org.junit.After;
-import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.InjectMocks;
@@ -46,6 +44,7 @@
 import javax.net.ssl.SSLContext;
 import java.io.IOException;
 import java.security.KeyStore;
+import java.time.Duration;
 import java.util.concurrent.TimeUnit;
 
 import static org.junit.Assert.*;
@@ -149,8 +148,12 @@ public void testShutdown() throws IOException {
     @Test
     public void settingTTl() {
         assertEquals(-1, config.getTTL());
+
         assertEquals(42, config.connectionTTL(42, TimeUnit.MILLISECONDS).getTTL());
         assertEquals(2520000, config.connectionTTL(42, TimeUnit.MINUTES).getTTL());
+
+        assertEquals(43, config.connectionTTL(Duration.ofMillis(43)).getTTL());
+        assertEquals(2580000, config.connectionTTL(Duration.ofMinutes(43)).getTTL());
     }
 
     @Test