Data caching and the Liberty profile

[Java programming language only] You can use data caching products with the WebSphere® Application Server Liberty to develop HTTP sessions, client-server connections through the REST gateway, and manage other cache integration scenarios.

In WebSphere eXtreme Scale, you can use the Liberty to connect to the data grid. For example, when you install WebSphere eXtreme Scale with the Liberty, you have access to features that you can use to manage HTTP session applications, Java client applications, and REST client applications that are installed in the Liberty.

The following features contain information about the main available features. Including a feature in the configuration might cause one or more features to be loaded automatically. Each feature includes a brief description and an example of how the feature is declared

Server feature

The server feature contains the capability for running an eXtreme Scale server, both catalog and container. Add the server feature when you want to run a catalog server in the Liberty profile or when you want to deploy a grid application into the Liberty profile.

wlp_install_root/usr/server/server_name/server.xml file

<server description="WebSphere eXtreme Scale Server">

  <featureManager>
    <feature>eXtremeScale.server-1.1</feature>
  </featureManager>

  <xsServer/>
</server>

Client feature

The client feature contains most of the programming model for eXtreme Scale. Add the client feature when you have an application that is running in the Liberty that is going to use eXtreme Scale APIs.

wlp_install_root/usr/server/wlp_install_root/server.xml file

<server description="WebSphere eXtreme Scale Client">

  <featureManager>
    <feature>eXtremeScale.client-1.1</feature>
  </featureManager>

 </server>

Web feature

Deprecated feature The web feature is deprecated. Use the webApp feature when you want to replicate HTTP session data for fault tolerance.

The web feature contains the capability to extend the Liberty profile web application. Add the web feature when you want to replicate HTTP session data for fault tolerance.

wlp_install_root/usr/server/server_name/server.xml file

<server description="WebSphere eXtreme Scale enabled Web Server">

  <featureManager>
    <feature>eXtremeScale.web-1.1</feature>
  </featureManager>

  <xswebAppV85/>
</server>

webApp feature

The webApp feature contains the capability to extend the Liberty web application. Add the webApp feature when you want to replicate HTTP session data for fault tolerance.

wlp_install_root/usr/server/server_name/server.xml file

<server description="WebSphere eXtreme Scale enabled Web Server">

<featureManager>
<feature>eXtremeScale.webApp-1.1</feature>
</featureManager>

<xswebApp/>
</server>

WebGrid feature

A Liberty server can host a data grid that caches data for applications to replicate HTTP session data for fault tolerance.

wlp_install_root/usr/server/server_name/server.xml file

<server description="WebSphere eXtreme Scale enabled Web Server">

<featureManager>
<feature>eXtremeScale.webGrid-1.1</feature>
</featureManager>

<xsWebGrid/>
</server>

REST feature

Use the Representational State Transfer (REST) gateway to access simple data grids that are hosted by a collective in the Liberty.

wlp_install_root/usr/server/server_name/server.xml file

<server description="WebSphere eXtreme Scale enabled Web Server">

<featureManager>
<feature>eXtremeScale.rest-1.1</feature>
</featureManager>

<xsRest/>
</server>

Dynamic cache feature

A Liberty server can host a data grid that caches data for applications that have dynamic cache enabled.

wlp_install_root/usr/server/server_name/server.xml file

<server description="WebSphere eXtreme Scale enabled Web Server">

  <featureManager>
    <feature>eXtremeScale.dynacacheGrid-1.1</feature>
  </featureManager>

  <xsDynacacheGrid/>
</server>

Dynamic cache app feature

The Liberty server can host WebSphere eXtreme Scale, which you can configure as a dynamic cache provider with this feature.

See the following example for using the default cache provider in the Liberty:

wlp_install_root/usr/server/server_name/server.xml file

<server description="WebSphere eXtreme Scale enabled Web Server">

<featureManager>
<feature>eXtremeScale.dynacacheapp-1.1</feature>
</featureManager>

<xsClientDomain default="production">
<endpointConfig> production;localhost:2809 </endpointConfig>
</xsClientDomain>

<distributedMap id="baseCache" libraryRef="idgenerator" cacheProviderName="WebSphere eXtreme Scale">
<xsDynacacheApp remoteDomain="production" />
</distributedMap>

<distributedMap id="cache01" jndiName="cache01" memorySizeInEntries="2000" createCacheAtServerStartup="true" cacheProviderName="WebSphere eXtreme Scale">
<xsDynacacheApp remoteDomain="production" />
</distributedMap> 
</server>