diff --git a/c11logtest/c11logtest/c11logtest.vcxproj b/c11logtest/c11logtest/c11logtest.vcxproj
index a702e84b..a3c4d9d7 100644
--- a/c11logtest/c11logtest/c11logtest.vcxproj
+++ b/c11logtest/c11logtest/c11logtest.vcxproj
@@ -94,17 +94,17 @@
     <ClInclude Include="..\..\include\c11log\details\log_msg.h" />
     <ClInclude Include="..\..\include\c11log\details\null_mutex.h" />
     <ClInclude Include="..\..\include\c11log\details\os.h" />
+    <ClInclude Include="..\..\include\c11log\details\pattern_formatter.h" />
     <ClInclude Include="..\..\include\c11log\details\stack_buf.h" />
     <ClInclude Include="..\..\include\c11log\factory.h" />
     <ClInclude Include="..\..\include\c11log\formatter.h" />
     <ClInclude Include="..\..\include\c11log\logger.h" />
-    <ClInclude Include="..\..\include\c11log\pattern_formatter.h" />
     <ClInclude Include="..\..\include\c11log\sinks\async_sink.h" />
     <ClInclude Include="..\..\include\c11log\sinks\base_sink.h" />
     <ClInclude Include="..\..\include\c11log\sinks\ostream_sink.h" />
     <ClInclude Include="..\..\include\c11log\sinks\file_sinks.h" />
-    <ClInclude Include="..\..\include\c11log\sinks\isink.h" />
     <ClInclude Include="..\..\include\c11log\sinks\null_sink.h" />
+    <ClInclude Include="..\..\include\c11log\sinks\sink.h" />
     <ClInclude Include="..\..\include\c11log\sinks\stdout_sinks.h" />
     <ClInclude Include="stdafx.h" />
     <ClInclude Include="targetver.h" />
diff --git a/c11logtest/c11logtest/c11logtest.vcxproj.filters b/c11logtest/c11logtest/c11logtest.vcxproj.filters
index 04ad2d6f..7d6eba11 100644
--- a/c11logtest/c11logtest/c11logtest.vcxproj.filters
+++ b/c11logtest/c11logtest/c11logtest.vcxproj.filters
@@ -84,17 +84,17 @@
     <ClInclude Include="..\..\include\c11log\common.h">
       <Filter>Header Files\c11log</Filter>
     </ClInclude>
-    <ClInclude Include="..\..\include\c11log\sinks\isink.h">
-      <Filter>Header Files\c11log\sinks</Filter>
-    </ClInclude>
     <ClInclude Include="..\..\include\c11log\factory.h">
       <Filter>Header Files\c11log</Filter>
     </ClInclude>
     <ClInclude Include="..\..\include\c11log\details\fast_istostr.h">
       <Filter>Header Files\c11log\details</Filter>
     </ClInclude>
-    <ClInclude Include="..\..\include\c11log\pattern_formatter.h">
-      <Filter>Header Files\c11log</Filter>
+    <ClInclude Include="..\..\include\c11log\sinks\sink.h">
+      <Filter>Header Files\c11log\sinks</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\include\c11log\details\pattern_formatter.h">
+      <Filter>Header Files\c11log\details</Filter>
     </ClInclude>
   </ItemGroup>
   <ItemGroup>
diff --git a/example/bench.cpp b/example/bench.cpp
index 882f3e34..9ae162ea 100644
--- a/example/bench.cpp
+++ b/example/bench.cpp
@@ -27,11 +27,11 @@ int main(int argc, char* argv[])
     cout_logger.info() << "Hello logger";
 
     auto nullsink = std::make_shared<sinks::null_sink<details::null_mutex>>();
+    auto rotating = std::make_shared<sinks::rotating_file_sink_mt>("myrotating", "txt", 1024 * 1024 * 5, 5, 100);
 
 
     auto formatter2 = std::unique_ptr<formatter>(new pattern_formatter(pattern));
-    logger my_logger("my_logger",  nullsink, std::move(formatter2));
-    //logger my_logger("my_logger", nullsink);
+    logger my_logger("my_logger", rotating, std::move(formatter2));
 
     auto start = system_clock::now();
     for (unsigned int i = 1; i <= howmany; ++i)
diff --git a/include/c11log/pattern_formatter.h b/include/c11log/details/pattern_formatter.h
similarity index 93%
rename from include/c11log/pattern_formatter.h
rename to include/c11log/details/pattern_formatter.h
index 15b2a0f0..cc7d43c1 100644
--- a/include/c11log/pattern_formatter.h
+++ b/include/c11log/details/pattern_formatter.h
@@ -5,9 +5,9 @@
 #include <memory>
 #include <vector>
 
-#include "formatter.h"
-#include "details/log_msg.h"
-#include "details/fast_oss.h"
+#include "../formatter.h"
+#include "log_msg.h"
+#include "fast_oss.h"
 
 
 namespace c11log
@@ -46,7 +46,7 @@ class Y_appender :public pattern_appender
 {
     void append(const details::log_msg& msg, details::fast_oss& oss) override
     {
-        oss.put_int(msg.tm_time.tm_year+1900, 4);
+        oss.put_int(msg.tm_time.tm_year + 1900, 4);
     }
 };
 
@@ -140,7 +140,7 @@ public:
     {}
     void append(const details::log_msg& msg, details::fast_oss& oss) override
     {
-        oss.putc( _ch);
+        oss.putc(_ch);
     }
 private:
     char _ch;
@@ -163,7 +163,7 @@ public:
 private:
     std::string _str;
 };
-}
+
 
 
 class pattern_formatter : public formatter
@@ -180,16 +180,16 @@ private:
     void compile_pattern(const std::string& pattern);
 };
 }
+}
 
 
-
-inline c11log::pattern_formatter::pattern_formatter(const std::string& pattern)
+inline c11log::details::pattern_formatter::pattern_formatter(const std::string& pattern)
 {
     compile_pattern(pattern);
 }
 
 
-inline void c11log::pattern_formatter::compile_pattern(const std::string& pattern)
+inline void c11log::details::pattern_formatter::compile_pattern(const std::string& pattern)
 {
     auto end = pattern.end();
     for (auto it = pattern.begin(); it != end; ++it)
@@ -209,7 +209,7 @@ inline void c11log::pattern_formatter::compile_pattern(const std::string& patter
     }
 
 }
-inline void c11log::pattern_formatter::handle_flag(char flag)
+inline void c11log::details::pattern_formatter::handle_flag(char flag)
 {
     switch (flag)
     {
@@ -271,7 +271,7 @@ inline void c11log::pattern_formatter::handle_flag(char flag)
 }
 
 
-inline void c11log::pattern_formatter::format(details::log_msg& msg)
+inline void c11log::details::pattern_formatter::format(details::log_msg& msg)
 {
     details::fast_oss oss;
     for (auto &appender : _appenders)
diff --git a/include/c11log/logger.h b/include/c11log/logger.h
index b9bada9a..0059fd67 100644
--- a/include/c11log/logger.h
+++ b/include/c11log/logger.h
@@ -27,7 +27,7 @@ class line_logger;
 class logger
 {
 public:
-    using sink_ptr = std::shared_ptr<sinks::isink>;
+    using sink_ptr = std::shared_ptr<sinks::sink>;
     using sinks_vector_t = std::vector<sink_ptr>;
     using sinks_init_list = std::initializer_list<sink_ptr>;
     using formatter_ptr = std::unique_ptr<formatter>;