diff --git a/config/checkstyle/checkstyle.xml b/config/checkstyle/checkstyle.xml
index b22b02d..3dc3e16 100644
--- a/config/checkstyle/checkstyle.xml
+++ b/config/checkstyle/checkstyle.xml
@@ -56,10 +56,10 @@ page at http://checkstyle.sourceforge.net/config.html -->
             <!-- Checks for out of order import statements. -->
 
             <property name="severity" value="warning"/>
-            <property name="groups" value="com,io,junit,net,org,java,javax"/>
+            <property name="groups" value="com,io,junit,net,org,javax,java"/>
             <!-- This ensures that static imports go last. -->
             <property name="option" value="under"/>
-            <property name="tokens" value="STATIC_IMPORT, IMPORT"/>
+            <property name="tokens" value="IMPORT, STATIC_IMPORT"/>
         </module>
 
         <!--
diff --git a/src/main/java/org/xbib/netty/http/client/Http2EventHandler.java b/src/main/java/org/xbib/netty/http/client/Http2EventHandler.java
index 7377d13..117e111 100644
--- a/src/main/java/org/xbib/netty/http/client/Http2EventHandler.java
+++ b/src/main/java/org/xbib/netty/http/client/Http2EventHandler.java
@@ -41,10 +41,6 @@ import io.netty.handler.codec.http2.HttpConversionUtil;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
-import static io.netty.handler.codec.http2.Http2Error.INTERNAL_ERROR;
-import static io.netty.handler.codec.http2.Http2Error.PROTOCOL_ERROR;
-import static io.netty.handler.codec.http2.Http2Exception.connectionError;
-
 /**
  * A HTTP/2 event adapter for a client.
  * This event adapter expects {@link Http2Settings} are sent from the server before the
@@ -80,7 +76,7 @@ public class Http2EventHandler extends Http2EventAdapter {
 
     /**
      * Handles an inbound {@code SETTINGS} frame.
-     * After frame is received, the reuqets is sent.
+     * After frame is received, the request is sent.
      *
      * @param ctx the context from the handler where the frame was read.
      * @param settings the settings received from the remote endpoint.
@@ -214,12 +210,13 @@ public class Http2EventHandler extends Http2EventAdapter {
         Http2Stream stream = connection.stream(streamId);
         FullHttpMessage msg = getMessage(stream);
         if (msg == null) {
-            throw connectionError(PROTOCOL_ERROR, "data frame received for unknown stream id %d", streamId);
+            throw Http2Exception.connectionError(Http2Error.PROTOCOL_ERROR,
+                    "data frame received for unknown stream id %d", streamId);
         }
         ByteBuf content = msg.content();
         final int dataReadableBytes = data.readableBytes();
         if (content.readableBytes() > maxContentLength - dataReadableBytes) {
-            throw connectionError(INTERNAL_ERROR,
+            throw Http2Exception.connectionError(Http2Error.INTERNAL_ERROR,
                     "content length exceeded maximum of %d for stream id %d", maxContentLength, streamId);
         }
         content.writeBytes(data, data.readerIndex(), dataReadableBytes);
@@ -349,7 +346,7 @@ public class Http2EventHandler extends Http2EventAdapter {
         }
     }
     /**
-     * The stream is out of scope for the HTTP message flow and will no longer be tracked
+     * The stream is out of scope for the HTTP message flow and will no longer be tracked.
      * @param stream The stream to remove associated state with
      * @param release {@code true} to call release on the value if it is present. {@code false} to not call release.
      */
@@ -361,7 +358,7 @@ public class Http2EventHandler extends Http2EventAdapter {
     }
 
     /**
-     * Set final headers and fire a channel read event
+     * Set final headers and fire a channel read event.
      *
      * @param ctx The context to fire the event on
      * @param msg The message to send
@@ -390,8 +387,7 @@ public class Http2EventHandler extends Http2EventAdapter {
         return msg;
     }
 
-    private void endHeader(ChannelHandlerContext ctx, Http2Stream stream, FullHttpMessage msg,
-                                   boolean endOfStream) {
+    private void endHeader(ChannelHandlerContext ctx, Http2Stream stream, FullHttpMessage msg, boolean endOfStream) {
         if (endOfStream) {
             fireChannelRead(ctx, msg, getMessage(stream) != msg, stream);
         } else {
diff --git a/src/main/java/org/xbib/netty/http/client/HttpClient.java b/src/main/java/org/xbib/netty/http/client/HttpClient.java
index 925d38a..ff7fa8d 100755
--- a/src/main/java/org/xbib/netty/http/client/HttpClient.java
+++ b/src/main/java/org/xbib/netty/http/client/HttpClient.java
@@ -35,12 +35,13 @@ import io.netty.handler.codec.http.HttpResponse;
 import io.netty.handler.codec.http.HttpVersion;
 import io.netty.handler.codec.http.cookie.ClientCookieEncoder;
 import io.netty.handler.codec.http.cookie.Cookie;
+import io.netty.handler.ssl.OpenSsl;
 import io.netty.util.concurrent.Future;
 import io.netty.util.concurrent.FutureListener;
 import org.xbib.netty.http.client.listener.CookieListener;
 import org.xbib.netty.http.client.listener.ExceptionListener;
-import org.xbib.netty.http.client.listener.HttpPushListener;
 import org.xbib.netty.http.client.listener.HttpHeadersListener;
+import org.xbib.netty.http.client.listener.HttpPushListener;
 import org.xbib.netty.http.client.listener.HttpResponseListener;
 import org.xbib.netty.http.client.util.InetAddressKey;
 import org.xbib.netty.http.client.util.NetworkUtils;
@@ -66,6 +67,8 @@ public final class HttpClient implements Closeable {
 
     private static final AtomicInteger streamId = new AtomicInteger(3);
 
+    private static final HttpClient INSTANCE = HttpClient.builder().build();
+
     private final ByteBufAllocator byteBufAllocator;
 
     private final EventLoopGroup eventLoopGroup;
@@ -83,11 +86,16 @@ public final class HttpClient implements Closeable {
         this.byteBufAllocator = byteBufAllocator;
         this.eventLoopGroup = eventLoopGroup;
         this.poolMap = new HttpClientChannelPoolMap(this, httpClientChannelContext, bootstrap, maxConnections);
+        logger.log(Level.FINE, () -> "OpenSSL ALPN support: " + OpenSsl.isAlpnSupported());
         NetworkUtils.extendSystemProperties();
         logger.log(Level.FINE, () -> "local host name = " + NetworkUtils.getLocalHostName("localhost"));
         logger.log(Level.FINE, NetworkUtils::displayNetworkInterfaces);
     }
 
+    public static HttpClient getInstance() {
+        return INSTANCE;
+    }
+
     /**
      * Create a builder to configure connecting.
      *
@@ -106,73 +114,105 @@ public final class HttpClient implements Closeable {
      *
      * @return a request builder
      */
-    public HttpClientRequestBuilder prepareGet() {
+    public HttpRequestBuilder prepareGet() {
         return prepareRequest(HttpMethod.GET);
     }
 
+    public HttpRequestBuilder prepareGet(String url) {
+        return prepareRequest(HttpMethod.GET).setURL(url);
+    }
+
     /**
      * Prepare a HTTP HEAD request.
      *
      * @return a request builder
      */
-    public HttpClientRequestBuilder prepareHead() {
+    public HttpRequestBuilder prepareHead() {
         return prepareRequest(HttpMethod.HEAD);
     }
 
+    public HttpRequestBuilder prepareHead(String url) {
+        return prepareRequest(HttpMethod.HEAD).setURL(url);
+    }
+
     /**
      * Prepare a HTTP PUT request.
      *
      * @return a request builder
      */
-    public HttpClientRequestBuilder preparePut() {
+    public HttpRequestBuilder preparePut() {
         return prepareRequest(HttpMethod.PUT);
     }
 
+    public HttpRequestBuilder preparePut(String url) {
+        return prepareRequest(HttpMethod.PUT).setURL(url);
+    }
+
     /**
      * Prepare a HTTP POST request.
      *
      * @return a request builder
      */
-    public HttpClientRequestBuilder preparePost() {
+    public HttpRequestBuilder preparePost() {
         return prepareRequest(HttpMethod.POST);
     }
 
+    public HttpRequestBuilder preparePost(String url) {
+        return prepareRequest(HttpMethod.POST).setURL(url);
+    }
+
     /**
      * Prepare a HTTP DELETE request.
      *
      * @return a request builder
      */
-    public HttpClientRequestBuilder prepareDelete() {
+    public HttpRequestBuilder prepareDelete() {
         return prepareRequest(HttpMethod.DELETE);
     }
 
+    public HttpRequestBuilder prepareDelete(String url) {
+        return prepareRequest(HttpMethod.DELETE).setURL(url);
+    }
+
     /**
      * Prepare a HTTP OPTIONS request.
      *
      * @return a request builder
      */
-    public HttpClientRequestBuilder prepareOptions() {
+    public HttpRequestBuilder prepareOptions() {
         return prepareRequest(HttpMethod.OPTIONS);
     }
 
+    public HttpRequestBuilder prepareOptions(String url) {
+        return prepareRequest(HttpMethod.OPTIONS).setURL(url);
+    }
+
     /**
      * Prepare a HTTP PATCH request.
      *
      * @return a request builder
      */
-    public HttpClientRequestBuilder preparePatch() {
+    public HttpRequestBuilder preparePatch() {
         return prepareRequest(HttpMethod.PATCH);
     }
 
+    public HttpRequestBuilder preparePatch(String url) {
+        return prepareRequest(HttpMethod.PATCH).setURL(url);
+    }
+
     /**
      * Prepare a HTTP TRACE request.
      *
      * @return a request builder
      */
-    public HttpClientRequestBuilder prepareTrace() {
+    public HttpRequestBuilder prepareTrace() {
         return prepareRequest(HttpMethod.TRACE);
     }
 
+    public HttpRequestBuilder prepareTrace(String url) {
+        return prepareRequest(HttpMethod.TRACE).setURL(url);
+    }
+
     public HttpClientChannelPoolMap poolMap() {
         return poolMap;
     }
@@ -258,7 +298,8 @@ public final class HttpClient implements Closeable {
                 } else if (httpRequest.protocolVersion().majorVersion() == 2) {
                     logger.log(Level.FINE, () -> "waiting for HTTP/2 settings");
                     settingsPromise.await(httpRequestContext.getTimeout(), TimeUnit.MILLISECONDS);
-                    logger.log(Level.FINE, () -> "waiting for HTTP/2 responses = " + httpRequestContext.getStreamIdPromiseMap().size());
+                    logger.log(Level.FINE, () -> "waiting for HTTP/2 responses = " +
+                            httpRequestContext.getStreamIdPromiseMap().size());
                     int timeout = httpRequestContext.getTimeout();
                     for (Map.Entry<Integer, Map.Entry<ChannelFuture, ChannelPromise>> entry :
                             httpRequestContext.getStreamIdPromiseMap().entrySet()) {
@@ -267,12 +308,13 @@ public final class HttpClient implements Closeable {
                             logger.log(Level.FINE, "waiting for channel, stream ID = " + entry.getKey());
                             if (!channelFuture.awaitUninterruptibly(timeout, TimeUnit.MILLISECONDS)) {
                                 IllegalStateException illegalStateException =
-                                        new IllegalStateException("time out while waiting to write for stream id " + entry.getKey());
+                                        new IllegalStateException("time out while waiting to write for stream id " +
+                                                entry.getKey());
                                 if (exceptionListener != null) {
                                     exceptionListener.onException(illegalStateException);
                                     httpRequestContext.fail(illegalStateException.getMessage());
-                                    final ChannelPool channelPool =
-                                            channelFuture.channel().attr(HttpClientChannelContext.CHANNEL_POOL_ATTRIBUTE_KEY).get();
+                                    final ChannelPool channelPool = channelFuture.channel()
+                                                    .attr(HttpClientChannelContext.CHANNEL_POOL_ATTRIBUTE_KEY).get();
                                     channelPool.release(channelFuture.channel());
                                 }
                                 throw illegalStateException;
@@ -285,13 +327,14 @@ public final class HttpClient implements Closeable {
                         logger.log(Level.FINE, "waiting for promise of stream ID = " + entry.getKey());
                         if (!promise.awaitUninterruptibly(timeout, TimeUnit.MILLISECONDS)) {
                             IllegalStateException illegalStateException =
-                                    new IllegalStateException("time out while waiting for response on stream id " + entry.getKey());
+                                    new IllegalStateException("time out while waiting for response on stream id " +
+                                            entry.getKey());
                             if (exceptionListener != null) {
                                 exceptionListener.onException(illegalStateException);
                                 httpRequestContext.fail(illegalStateException.getMessage());
                                 if (channelFuture != null) {
-                                    final ChannelPool channelPool =
-                                            channelFuture.channel().attr(HttpClientChannelContext.CHANNEL_POOL_ATTRIBUTE_KEY).get();
+                                    final ChannelPool channelPool = channelFuture.channel()
+                                                    .attr(HttpClientChannelContext.CHANNEL_POOL_ATTRIBUTE_KEY).get();
                                     channelPool.release(channelFuture.channel());
                                 }
                             }
@@ -303,8 +346,8 @@ public final class HttpClient implements Closeable {
                                 exceptionListener.onException(runtimeException);
                                 httpRequestContext.fail(runtimeException.getMessage());
                                 if (channelFuture != null) {
-                                    final ChannelPool channelPool =
-                                            channelFuture.channel().attr(HttpClientChannelContext.CHANNEL_POOL_ATTRIBUTE_KEY).get();
+                                    final ChannelPool channelPool = channelFuture.channel()
+                                            .attr(HttpClientChannelContext.CHANNEL_POOL_ATTRIBUTE_KEY).get();
                                     channelPool.release(channelFuture.channel());
                                 }
                             }
diff --git a/src/main/java/org/xbib/netty/http/client/HttpClientBuilder.java b/src/main/java/org/xbib/netty/http/client/HttpClientBuilder.java
index 6bc4d33..6b5a486 100644
--- a/src/main/java/org/xbib/netty/http/client/HttpClientBuilder.java
+++ b/src/main/java/org/xbib/netty/http/client/HttpClientBuilder.java
@@ -30,9 +30,9 @@ import io.netty.handler.ssl.CipherSuiteFilter;
 import io.netty.handler.ssl.SslProvider;
 import org.xbib.netty.http.client.util.ClientAuthMode;
 
+import javax.net.ssl.TrustManagerFactory;
 import java.io.InputStream;
 import java.net.InetSocketAddress;
-import javax.net.ssl.TrustManagerFactory;
 
 /**
  *
diff --git a/src/main/java/org/xbib/netty/http/client/HttpClientChannelContext.java b/src/main/java/org/xbib/netty/http/client/HttpClientChannelContext.java
index 8d9d2ba..a0ee4d0 100644
--- a/src/main/java/org/xbib/netty/http/client/HttpClientChannelContext.java
+++ b/src/main/java/org/xbib/netty/http/client/HttpClientChannelContext.java
@@ -24,13 +24,13 @@ import io.netty.handler.ssl.SslProvider;
 import io.netty.util.AttributeKey;
 import org.xbib.netty.http.client.listener.CookieListener;
 import org.xbib.netty.http.client.listener.ExceptionListener;
-import org.xbib.netty.http.client.listener.HttpPushListener;
 import org.xbib.netty.http.client.listener.HttpHeadersListener;
+import org.xbib.netty.http.client.listener.HttpPushListener;
 import org.xbib.netty.http.client.listener.HttpResponseListener;
 import org.xbib.netty.http.client.util.ClientAuthMode;
 
-import java.io.InputStream;
 import javax.net.ssl.TrustManagerFactory;
+import java.io.InputStream;
 
 /**
  */
diff --git a/src/main/java/org/xbib/netty/http/client/HttpClientChannelContextDefaults.java b/src/main/java/org/xbib/netty/http/client/HttpClientChannelContextDefaults.java
index 035cde8..eb24327 100644
--- a/src/main/java/org/xbib/netty/http/client/HttpClientChannelContextDefaults.java
+++ b/src/main/java/org/xbib/netty/http/client/HttpClientChannelContextDefaults.java
@@ -21,8 +21,8 @@ import io.netty.handler.ssl.OpenSsl;
 import io.netty.handler.ssl.SslProvider;
 import io.netty.handler.ssl.SupportedCipherSuiteFilter;
 import io.netty.handler.ssl.util.InsecureTrustManagerFactory;
-import org.xbib.netty.http.client.util.InetAddressKey;
 import org.xbib.netty.http.client.util.ClientAuthMode;
+import org.xbib.netty.http.client.util.InetAddressKey;
 
 import javax.net.ssl.TrustManagerFactory;
 
diff --git a/src/main/java/org/xbib/netty/http/client/HttpClientChannelInitializer.java b/src/main/java/org/xbib/netty/http/client/HttpClientChannelInitializer.java
index 0b9d33b..7656f2b 100644
--- a/src/main/java/org/xbib/netty/http/client/HttpClientChannelInitializer.java
+++ b/src/main/java/org/xbib/netty/http/client/HttpClientChannelInitializer.java
@@ -50,15 +50,15 @@ import io.netty.handler.timeout.ReadTimeoutHandler;
 import org.xbib.netty.http.client.listener.ExceptionListener;
 import org.xbib.netty.http.client.util.InetAddressKey;
 
-import java.util.Arrays;
-import java.util.concurrent.TimeUnit;
-import java.util.logging.Level;
-import java.util.logging.Logger;
 import javax.net.ssl.SNIHostName;
 import javax.net.ssl.SNIServerName;
 import javax.net.ssl.SSLEngine;
 import javax.net.ssl.SSLException;
 import javax.net.ssl.SSLParameters;
+import java.util.Arrays;
+import java.util.concurrent.TimeUnit;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 
 /**
  * Netty HTTP client channel initializer.
@@ -259,7 +259,7 @@ class HttpClientChannelInitializer extends ChannelInitializer<SocketChannel> {
     }
 
     @Sharable
-    private class UpgradeRequestHandler extends ChannelInboundHandlerAdapter {
+    private static class UpgradeRequestHandler extends ChannelInboundHandlerAdapter {
 
         /**
          * Send an upgrade request if channel becomes active.
@@ -299,7 +299,7 @@ class HttpClientChannelInitializer extends ChannelInitializer<SocketChannel> {
      * A Netty handler that logs user events and find expetced ones.
      */
     @Sharable
-    private class UserEventLogger extends ChannelInboundHandlerAdapter {
+    private static class UserEventLogger extends ChannelInboundHandlerAdapter {
 
         @Override
         public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
@@ -319,7 +319,7 @@ class HttpClientChannelInitializer extends ChannelInitializer<SocketChannel> {
      * A Netty handler that logs the I/O traffic of a connection.
      */
     @Sharable
-    private final class TrafficLoggingHandler extends LoggingHandler {
+    private static class TrafficLoggingHandler extends LoggingHandler {
 
         TrafficLoggingHandler() {
             super("client", LogLevel.TRACE);
diff --git a/src/main/java/org/xbib/netty/http/client/HttpClientRequestBuilder.java b/src/main/java/org/xbib/netty/http/client/HttpClientRequestBuilder.java
index c675c01..f1660fd 100644
--- a/src/main/java/org/xbib/netty/http/client/HttpClientRequestBuilder.java
+++ b/src/main/java/org/xbib/netty/http/client/HttpClientRequestBuilder.java
@@ -2,6 +2,7 @@ package org.xbib.netty.http.client;
 
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.ByteBufAllocator;
+import io.netty.buffer.UnpooledByteBufAllocator;
 import io.netty.handler.codec.http.DefaultFullHttpRequest;
 import io.netty.handler.codec.http.DefaultHttpHeaders;
 import io.netty.handler.codec.http.DefaultHttpRequest;
@@ -19,8 +20,8 @@ import io.netty.util.AsciiString;
 import io.netty.util.CharsetUtil;
 import org.xbib.netty.http.client.listener.CookieListener;
 import org.xbib.netty.http.client.listener.ExceptionListener;
-import org.xbib.netty.http.client.listener.HttpPushListener;
 import org.xbib.netty.http.client.listener.HttpHeadersListener;
+import org.xbib.netty.http.client.listener.HttpPushListener;
 import org.xbib.netty.http.client.listener.HttpResponseListener;
 
 import java.io.IOException;
@@ -50,6 +51,8 @@ public class HttpClientRequestBuilder implements HttpRequestBuilder, HttpRequest
 
     private static final Logger logger = Logger.getLogger(HttpClientRequestBuilder.class.getName());
 
+    private static final HttpVersion HTTP_2_0 = HttpVersion.valueOf("HTTP/2.0");
+
     private final HttpClient httpClient;
 
     private final ByteBufAllocator byteBufAllocator;
@@ -96,6 +99,11 @@ public class HttpClientRequestBuilder implements HttpRequestBuilder, HttpRequest
 
     private HttpPushListener httpPushListener;
 
+    HttpClientRequestBuilder(HttpMethod httpMethod,
+                             ByteBufAllocator byteBufAllocator, int streamId) {
+        this(null, httpMethod, byteBufAllocator, streamId);
+    }
+
     /**
      * Construct HTTP client request builder.
      *
@@ -114,6 +122,28 @@ public class HttpClientRequestBuilder implements HttpRequestBuilder, HttpRequest
         this.cookies = new HashSet<>();
     }
 
+    public static HttpRequestBuilder builder(HttpMethod httpMethod) {
+        return new HttpClientRequestBuilder(httpMethod, UnpooledByteBufAllocator.DEFAULT, 3);
+    }
+
+    @Override
+    public HttpRequestBuilder setHttp1() {
+        this.httpVersion = HttpVersion.HTTP_1_1;
+        return this;
+    }
+
+    @Override
+    public HttpRequestBuilder setHttp2() {
+        this.httpVersion = HTTP_2_0;
+        return this;
+    }
+
+    @Override
+    public HttpRequestBuilder setVersion(String httpVersion) {
+        this.httpVersion = HttpVersion.valueOf(httpVersion);
+        return this;
+    }
+
     @Override
     public HttpRequestBuilder setTimeout(int timeout) {
         this.timeout = timeout;
@@ -171,12 +201,6 @@ public class HttpClientRequestBuilder implements HttpRequestBuilder, HttpRequest
         return this;
     }
 
-    @Override
-    public HttpRequestBuilder setVersion(String httpVersion) {
-        this.httpVersion = HttpVersion.valueOf(httpVersion);
-        return this;
-    }
-
     @Override
     public HttpRequestBuilder acceptGzip(boolean gzip) {
         this.gzip = gzip;
@@ -314,6 +338,14 @@ public class HttpClientRequestBuilder implements HttpRequestBuilder, HttpRequest
 
     @Override
     public HttpRequestContext execute() {
+        return execute(httpClient);
+    }
+
+    @Override
+    public HttpRequestContext execute(HttpClient httpClient) {
+        if (httpClient == null) {
+            return null;
+        }
         if (httpRequest == null) {
             httpRequest = build();
         }
@@ -378,8 +410,7 @@ public class HttpClientRequestBuilder implements HttpRequestBuilder, HttpRequest
     }
 
     private void content(byte[] buf, AsciiString contentType) throws IOException {
-        ByteBuf buffer = byteBufAllocator.buffer(buf.length).writeBytes(buf);
-        content(buffer, contentType);
+        content(byteBufAllocator.buffer(buf.length).writeBytes(buf), contentType);
     }
 
     private void content(ByteBuf body, AsciiString contentType) throws IOException {
diff --git a/src/main/java/org/xbib/netty/http/client/HttpRequestBuilder.java b/src/main/java/org/xbib/netty/http/client/HttpRequestBuilder.java
index ed8071a..129893f 100644
--- a/src/main/java/org/xbib/netty/http/client/HttpRequestBuilder.java
+++ b/src/main/java/org/xbib/netty/http/client/HttpRequestBuilder.java
@@ -21,8 +21,8 @@ import io.netty.handler.codec.http.HttpRequest;
 import io.netty.handler.codec.http.cookie.Cookie;
 import org.xbib.netty.http.client.listener.CookieListener;
 import org.xbib.netty.http.client.listener.ExceptionListener;
-import org.xbib.netty.http.client.listener.HttpPushListener;
 import org.xbib.netty.http.client.listener.HttpHeadersListener;
+import org.xbib.netty.http.client.listener.HttpPushListener;
 import org.xbib.netty.http.client.listener.HttpResponseListener;
 
 import java.io.IOException;
@@ -33,7 +33,9 @@ import java.util.function.Function;
  */
 public interface HttpRequestBuilder {
 
-    HttpRequestBuilder setTimeout(int timeout);
+    HttpRequestBuilder setHttp1();
+
+    HttpRequestBuilder setHttp2();
 
     HttpRequestBuilder setVersion(String httpVersion);
 
@@ -81,9 +83,13 @@ public interface HttpRequestBuilder {
 
     HttpRequestBuilder onPushReceived(HttpPushListener httpPushListener);
 
+    HttpRequestBuilder setTimeout(int timeout);
+
     HttpRequest build();
 
     HttpRequestContext execute();
 
+    HttpRequestContext execute(HttpClient httpClient);
+
     <T> CompletableFuture<T> execute(Function<FullHttpResponse, T> supplier);
 }
diff --git a/src/main/java/org/xbib/netty/http/client/HttpRequestContext.java b/src/main/java/org/xbib/netty/http/client/HttpRequestContext.java
index 6f2578d..99bad33 100755
--- a/src/main/java/org/xbib/netty/http/client/HttpRequestContext.java
+++ b/src/main/java/org/xbib/netty/http/client/HttpRequestContext.java
@@ -24,8 +24,8 @@ import io.netty.handler.codec.http2.Http2Headers;
 import io.netty.util.internal.PlatformDependent;
 import org.xbib.netty.http.client.listener.CookieListener;
 import org.xbib.netty.http.client.listener.ExceptionListener;
-import org.xbib.netty.http.client.listener.HttpPushListener;
 import org.xbib.netty.http.client.listener.HttpHeadersListener;
+import org.xbib.netty.http.client.listener.HttpPushListener;
 import org.xbib.netty.http.client.listener.HttpResponseListener;
 import org.xbib.netty.http.client.util.LimitedHashSet;
 
@@ -91,6 +91,8 @@ public final class HttpRequestContext implements HttpResponseListener, HttpReque
 
     private Map<Integer, FullHttpResponse> httpResponses;
 
+    private boolean hastimeout;
+
     private Long stopTime;
 
     HttpRequestContext(URI uri, HttpRequest httpRequest, AtomicInteger streamId,
@@ -233,11 +235,7 @@ public final class HttpRequestContext implements HttpResponseListener, HttpReque
             return false;
         }
         boolean secure = "https".equals(uri.getScheme());
-        boolean secureMatch = (secure && cookie.isSecure()) || (!secure && !cookie.isSecure());
-        if (!secureMatch) {
-            return false;
-        }
-        return true;
+        return (secure && cookie.isSecure()) || (!secure && !cookie.isSecure());
     }
 
     public int getTimeout() {
@@ -293,11 +291,15 @@ public final class HttpRequestContext implements HttpResponseListener, HttpReque
     }
 
     public HttpRequestContext waitFor(long value, TimeUnit timeUnit) throws InterruptedException {
-        latch.await(value, timeUnit);
+        this.hastimeout = latch.await(value, timeUnit);
         stopTime = System.currentTimeMillis();
         return this;
     }
 
+    public boolean isTimeout() {
+        return hastimeout;
+    }
+
     public void success(String reason) {
         logger.log(Level.FINE, () -> "success because of " + reason);
         if (succeeded.compareAndSet(false, true)) {
diff --git a/src/main/java/org/xbib/netty/http/client/HttpRequestDefaults.java b/src/main/java/org/xbib/netty/http/client/HttpRequestDefaults.java
index 190e5fd..2b52a64 100644
--- a/src/main/java/org/xbib/netty/http/client/HttpRequestDefaults.java
+++ b/src/main/java/org/xbib/netty/http/client/HttpRequestDefaults.java
@@ -21,8 +21,6 @@ import io.netty.handler.codec.http.HttpVersion;
  */
 public interface HttpRequestDefaults {
 
-    int DEFAULT_TIMEOUT_MILLIS = 5000;
-
     HttpVersion DEFAULT_HTTP_VERSION = HttpVersion.HTTP_1_1;
 
     String DEFAULT_USER_AGENT = HttpClientUserAgent.getUserAgent();
@@ -31,5 +29,7 @@ public interface HttpRequestDefaults {
 
     boolean DEFAULT_FOLLOW_REDIRECT = true;
 
+    int DEFAULT_TIMEOUT_MILLIS = 5000;
+
     int DEFAULT_MAX_REDIRECT = 10;
 }
diff --git a/src/main/java/org/xbib/netty/http/client/listener/HttpPushListener.java b/src/main/java/org/xbib/netty/http/client/listener/HttpPushListener.java
index 24a5e6e..22d3fb7 100644
--- a/src/main/java/org/xbib/netty/http/client/listener/HttpPushListener.java
+++ b/src/main/java/org/xbib/netty/http/client/listener/HttpPushListener.java
@@ -19,7 +19,7 @@ import io.netty.handler.codec.http.FullHttpResponse;
 import io.netty.handler.codec.http2.Http2Headers;
 
 /**
- * This listener can forward HTTP push
+ * This listener can forward HTTP push.
  *
  */
 @FunctionalInterface
diff --git a/src/main/java/org/xbib/netty/http/client/util/InetAddressKey.java b/src/main/java/org/xbib/netty/http/client/util/InetAddressKey.java
index 07b59f3..eb7cd7b 100644
--- a/src/main/java/org/xbib/netty/http/client/util/InetAddressKey.java
+++ b/src/main/java/org/xbib/netty/http/client/util/InetAddressKey.java
@@ -66,7 +66,7 @@ public class InetAddressKey {
                 host.equals(((InetAddressKey) object).host) &&
                 port == ((InetAddressKey) object).port &&
                 version.equals(((InetAddressKey) object).version) &&
-                secure == ((InetAddressKey) object).secure;
+                secure.equals(((InetAddressKey) object).secure);
     }
 
     @Override
diff --git a/src/main/java/org/xbib/netty/http/client/util/LimitedHashSet.java b/src/main/java/org/xbib/netty/http/client/util/LimitedHashSet.java
index c4fb2fd..35aa242 100644
--- a/src/main/java/org/xbib/netty/http/client/util/LimitedHashSet.java
+++ b/src/main/java/org/xbib/netty/http/client/util/LimitedHashSet.java
@@ -20,6 +20,7 @@ import java.util.LinkedHashSet;
 
 /**
  * A {@link java.util.Set} with limited size. If the size is exceeded, an exception is thrown.
+ * @param <E> the element type
  */
 public final class LimitedHashSet<E> extends LinkedHashSet<E> {
 
diff --git a/src/main/java/org/xbib/netty/http/client/util/NetworkUtils.java b/src/main/java/org/xbib/netty/http/client/util/NetworkUtils.java
index 684f051..d5df41a 100644
--- a/src/main/java/org/xbib/netty/http/client/util/NetworkUtils.java
+++ b/src/main/java/org/xbib/netty/http/client/util/NetworkUtils.java
@@ -206,11 +206,14 @@ public class NetworkUtils {
     public static boolean matchesNetwork(NetworkClass given, NetworkClass expected) {
         switch (expected) {
             case ANY:
-                return EnumSet.of(NetworkClass.LOOPBACK, NetworkClass.LOCAL, NetworkClass.PUBLIC, NetworkClass.ANY).contains(given);
+                return EnumSet.of(NetworkClass.LOOPBACK, NetworkClass.LOCAL, NetworkClass.PUBLIC, NetworkClass.ANY)
+                        .contains(given);
             case PUBLIC:
-                return EnumSet.of(NetworkClass.LOOPBACK, NetworkClass.LOCAL, NetworkClass.PUBLIC).contains(given);
+                return EnumSet.of(NetworkClass.LOOPBACK, NetworkClass.LOCAL, NetworkClass.PUBLIC)
+                        .contains(given);
             case LOCAL:
-                return EnumSet.of(NetworkClass.LOOPBACK, NetworkClass.LOCAL).contains(given);
+                return EnumSet.of(NetworkClass.LOOPBACK, NetworkClass.LOCAL)
+                        .contains(given);
             case LOOPBACK:
                 return NetworkClass.LOOPBACK == given;
         }
@@ -509,8 +512,12 @@ public class NetworkUtils {
                     .append(" prefixlen:").append(interfaceAddress.getNetworkPrefixLength());
         } else {
             int netmask = 0xFFFFFFFF << (32 - interfaceAddress.getNetworkPrefixLength());
-            byte[] b = new byte[] { (byte)(netmask >>> 24), (byte)(netmask >>> 16 & 0xFF),
-                    (byte)(netmask >>> 8 & 0xFF), (byte)(netmask & 0xFF) };
+            byte[] b = new byte[] {
+                    (byte) (netmask >>> 24),
+                    (byte) (netmask >>> 16 & 0xFF),
+                    (byte) (netmask >>> 8 & 0xFF),
+                    (byte) (netmask & 0xFF)
+            };
             sb.append("inet ").append(format(address));
             try {
                 sb.append(" netmask:").append(format(InetAddress.getByAddress(b)));
diff --git a/src/test/java/org/xbib/netty/http/client/test/AkamaiTest.java b/src/test/java/org/xbib/netty/http/client/test/AkamaiTest.java
index 42df734..4ca148f 100644
--- a/src/test/java/org/xbib/netty/http/client/test/AkamaiTest.java
+++ b/src/test/java/org/xbib/netty/http/client/test/AkamaiTest.java
@@ -34,39 +34,21 @@ public class AkamaiTest {
 
     @Test
     public void testAkamaiHttps() throws Exception {
-
-        // here we see server PUSH_PROMISE as response to headers, a go-away frame is written.
-
-        /*
-        ----------------INBOUND--------------------
-        [id: 0x27d23874, L:/192.168.178.23:52376 - R:http2.akamai.com/104.94.191.203:443]
-        PUSH_PROMISE: streamId=3, promisedStreamId=2, headers=DefaultHttp2Headers[:method: GET,
-        :path: /resources/push.css, :authority: http2.akamai.com, :scheme: https, host: http2.akamai.com,
-        user-agent: XbibHttpClient/unknown (Java/Azul Systems, Inc./1.8.0_112) (Netty/4.1.9.Final),
-        accept-encoding: gzip], padding=0
-                ------------------------------------
-        2017-05-01 18:53:46.076 AM FEINSTEN [org.xbib.netty.http.client.HttpClientChannelInitializer]
-        io.netty.handler.codec.http2.Http2FrameLogger log
-        ----------------OUTBOUND--------------------
-        [id: 0x27d23874, L:/192.168.178.23:52376 - R:http2.akamai.com/104.94.191.203:443]
-        GO_AWAY: lastStreamId=2, errorCode=1, length=75, bytes=556e7265636f676e697a656420485454...
-         */
-
-        HttpClient httpClient = HttpClient.builder()
-                .build();
-
-        httpClient.prepareGet()
-                .setVersion("HTTP/2.0")
-                .setURL("https://http2.akamai.com/demo/h2_demo_frame.html")
+        HttpClient httpClient = HttpClient.getInstance();
+        httpClient.prepareGet("https://http2.akamai.com/demo/h2_demo_frame.html")
+                .setHttp2()
                 .onException(e -> logger.log(Level.SEVERE, e.getMessage(), e))
                 .onResponse(fullHttpResponse -> {
                     String response = fullHttpResponse.content().toString(StandardCharsets.UTF_8);
-                    logger.log(Level.INFO, "status = " + fullHttpResponse.status() + " response body = " + response);
+                    logger.log(Level.INFO, "status = " + fullHttpResponse.status()
+                            + " response body = " + response);
                 })
-                .onPushReceived((headers, fullHttpResponse) -> {
-                    logger.log(Level.INFO, "received push promise: request headers = " + headers
+                .onPushReceived((requestHeaders, fullHttpResponse) -> {
+                    String response = fullHttpResponse.content().toString(StandardCharsets.UTF_8);
+                    logger.log(Level.INFO, "received push promise: request headers = " + requestHeaders
                             + " status = " + fullHttpResponse.status()
                             + " response headers = " + fullHttpResponse.headers().entries()
+                            + " response body = " + response
                     );
                 })
                 .execute()