Limit concurrent requests

It is possible to limit the number of concurrent requests to a URL. You implement the limitation by means of a filter. See also the next example. It limits the number of concurrent requests to the path /application/a/ to 100, and those to the path /application/b/ to 50:

<filter>
 <filter-name>LimitRequest</filter-name>
 <filter-class>ch:nevis:navajo:apglue:httpd_${HTTPD_LIB_VERSION}_x:servlet:ApacheConfigFilter</filter-class>
 <filter-lib>@PKG_HOME@/webapp/WEB-INF/lib/libApache${HTTPD_LIB_VERSION}_Servlet.so.1</filter-lib>
 <init-param>
  <param-name>ServerConfig</param-name>
  <param-value>
   LoadModule qos_module @PKG_HOME@/lib/libmodqos_ap_${HTTPD_LIB_VERSION}.so.1
   QS_LocRequestLimit '/application/a/' 100
   QS_LocRequestLimit '/application/b/' 50
  </param-value>
 </init-param>
</filter>

You need the optional library /opt/nevisproxy/lib/libmodqos_ap${HTTPD_LIB_VERSION}.so.1 to be able to use the parameter org.apache.host.QS_LocRequestLimit. If you have not load this library already, do it now. You can find the above example configuration in the installed nevisProxy package, in the directory /opt/nevisproxy/examples/apache_module/.