The http-local-app

The AsyncServlet in this app implements app uses the Asynchronous HTTP Client(AHC) and implements the CometProcessor interface. This will The CometProcessor will make it's event method invoked rather than the usual service method, according to the event which occurred. The event object gives access to the usual request and response objects, which may be used in the usual way. More information about this can be read here.

...

Stop the server.
edit geronimo_home/var/config/config.xml
add load="false" to the TomcatWebConnector gbean. The line would now look like this
<gbean load="false" name="TomcatWebConnector">

for the module org.apache.geronimo.configs/tomcat6/<version>/car, add the following gbean

Code Block

	XML
	XML
borderStyle	solid

<gbean gbeanInfo="org.apache.geronimo.tomcat.connector.Http11NIOConnectorGBean" 
       name="org.apache.geronimo.configs/tomcat6/2.0.1/car?ServiceModule=org.apache.geronimo.configs/tomcat6/2.0.1/car,j2eeType=GBean,name=TomcatNIOConnector">
<attribute name="useExecutor">true</attribute>
<attribute name="maxThreads">40</attribute>
<attribute name="pollerThreadCount">1</attribute>
<attribute name="socket_soTimeout">5000</attribute>
<attribute name="selectorTimeout">1000</attribute>
<attribute name="connectionTimeout">60000</attribute>
<attribute name="socket_soLingerOn">true</attribute>
<attribute name="acceptorThreadCount">1</attribute>
<attribute name="port">8080</attribute>
<attribute name="pollerThreadPriority">5</attribute>
<attribute name="compressableMimeType">text/html,text/xml,text/plain</attribute>
<attribute name="socket_performanceLatency">0</attribute>
<attribute name="useComet">true</attribute>
<attribute name="useIPVHosts">false</attribute>
<attribute name="maxHttpHeaderSize">4096</attribute>
<attribute name="restrictedUserAgents" value=""/>
<attribute name="acceptorThreadPriority">5</attribute>
<attribute name="proxyPort">0</attribute>
<attribute name="maxPostSize">2097152</attribute>
<attribute name="minSpareThreads">10</attribute>
<attribute name="socketBuffer">9000</attribute>
<attribute name="redirectPort">8443</attribute>
<attribute name="bufferSize">2048</attribute>
<attribute name="socket_soReuseAddress">false</attribute>
<attribute name="useSendfile">true</attribute>
<attribute name="threadPriority">5</attribute>
<attribute name="socket_tcpNoDelay">false</attribute>
<attribute name="useBodyEncodingForURI">false</attribute>
<attribute name="maxSpareThreads">100</attribute>
<attribute name="enableLookups">true</attribute>
<attribute name="socket_performanceConnectionTime">1</attribute>
<attribute name="socket_appWriteBufSize">8192</attribute>
<attribute name="maxKeepAliveRequests">100</attribute>
<attribute name="socket_ooBInline">true</attribute>
<attribute name="socket_keyCache">500</attribute>
<attribute name="disableUploadTimeout">true</attribute>
<attribute name="socket_bufferPoolSize">104857600</attribute>
<attribute name="keepAliveTimeout">60000</attribute>
<attribute name="acceptCount">100</attribute>
<attribute name="socket_txBufSize">43800</attribute>
<attribute name="connectionLinger">-1</attribute>
<attribute name="command_line_options">true</attribute>
<attribute name="tcpNoDelay">true</attribute>
<attribute name="oomParachute">1048576</attribute>
<attribute name="socket_appReadBufSize">8192</attribute>
<attribute name="selectorPool_maxSpareSelectors">-1</attribute>
<attribute name="xpoweredBy">false</attribute>
<attribute name="socket_rxBufSize">25188</attribute>
<attribute name="maxSavePostSize">4096</attribute>
<attribute name="socket_soLingerTime">25</attribute>
<attribute name="compression">off</attribute>
<attribute name="host">0.0.0.0</attribute>
<attribute name="socket_eventCache">500</attribute>
<attribute name="socket_performanceBandwidth">1</attribute>
<attribute name="noCompressionUserAgents" value=""/>
<attribute name="name">TomcatNIOConnector</attribute>
<attribute name="socket_soKeepAlive">false</attribute>
<attribute name="socket_soTrafficClass">28</attribute>
<attribute name="socket_directBuffer">false</attribute>
<attribute name="selectorPool_maxSelectors">200</attribute>
<attribute name="emptySessionPath">false</attribute>
<attribute name="uriEncoding">ISO-8859-1</attribute>
<attribute name="allowTrace">false</attribute>
<attribute name="processCache">200</attribute>
<attribute name="socket_processorCache">500</attribute>
<attribute name="server" null="true"/>
<attribute name="proxyName" null="true"/>
<reference name="TomcatContainer">
<pattern>
<groupId>org.apache.geronimo.configs</groupId>
<artifactId>tomcat6</artifactId>
<version>2.0.1</version>
<type>car</type>
<name>TomcatWebContainer</name>
</pattern>
</reference>
<reference name="ServerInfo">
<pattern>
<groupId>org.apache.geronimo.configs</groupId>
<artifactId>j2ee-system</artifactId>
<version>2.0.1</version>
<type>car</type>
<name>ServerInfo</name>
</pattern>
</reference>
</gbean>

The gbean uses version 2.0.1. Replace that with the appropriate version of your server
Start the server.

...

Deploy samples\async-http\http-local-app\target\http-local-app-2.0-SNAPSHOT.war on the Geronimo server we configured earlier using either the consoleor the command line
$geronimo_home/bin>./deploy.sh deploy samples\async-http\http-local-app\target\http-local-app-2.0-SNAPSHOT.war
Deploy samples\async-http directory\http-remote-app\target\http-remote-app-2.0-SNAPSHOT.war on any server on the remote machine.
Point your browser to http://localhost:8080/localApp/async. If you wish to override the remoteUrl set in the <init-param> of the web.xml, you may pass it as a request param (http://localhost:8080/localApp/async?remoteUrl=http://foo:8080)
You should see either a dummy html or one of the popular HTTP errors.

...

Download the client python script. You will need python installed on your machine to run this script. You can download Python from here.
The script takes 3 arguments - the name of the machine running http-local-app (AHC), the url of the server on the remote app and the number of threads.
ahcrequest.py local_machine http://remote_machine:8080^{Image Removed} 200

Test Results

The following test results show a comparison between an AHC enhanced servlet and a normal blocking servlet. Each of these servlets are pounded by 16, 200 and 500 simultaneous requests. The output captured from the python script shows the response time for each request. These tests also demonstrate the significance of tuning the IP stacks. When none of the machines are tuned, the response time starts increasing as the number of threads start increasing. Executing a netstat command shows that most sockets are either in TIME_WAIT or CLOSED_WAIT state.

...

Child pages

Versions Compared

Old Version 26

New Version 27

Key

The http-local-app

Test Results

Child pages

Page History

Versions Compared

Old Version 26

New Version 27

Key

The http-local-app

Test Results