The Tuscany SCA Java runtime can run inside a webapp (a WAR) and expose 
services when the webapp is started. In order for this to work 
a number of things have to be in place in the webapp:

1. The Tuscany runtime jars have to be packaed in the webapp WEB-INF/lib
   directory
2. The Tuscany HTTP filter servlet has to be configured in the 
   WEB-INF/web.xml file using something like:

  <filter>
    <filter-name>tuscany</filter-name> 
    <filter-class>org.apache.tuscany.sca.host.webapp.TuscanyServletFilter</filter-class> 
  </filter>

  <filter-mapping>
    <filter-name>tuscany</filter-name> 
    <url-pattern>/*</url-pattern> 
  </filter-mapping>

3. The composite application has to packaged in the WAR file. When the 
   TuscanyServletFilter started it effectvely reads its own WAR file as
   the contribution. As an alternative you can package complete 
   contribution archives in the WEB-INF/sca-contributions directory.

In the getting-started/helloworl-webapp sample we provided a Maven 
build script that perform these WAR packaging steps. 

To execute a webapp based contributions (sample contributions that have webapp
at the end of their name) you can build the contribution using maven and then 
copy the resulting war file to your web container of choice

For example, for learning-more/binding-jsonrpc/contribution-calculator-webapp, 
do the following

cd learning-more/binding-jsonrpc/contribution-calculator-webapp
mvn 
cp target/sample-contribution-binding-jsonrpc-calculator-webapp.war your_container_deployment-dir


As an alternative sample webapp based contributions can be run within Jetty directly from Maven, look for 
webapp contributions that have the following configuration in their pom.xml file:

<plugin>
    <groupId>org.mortbay.jetty</groupId>
    <artifactId>maven-jetty-plugin</artifactId>
    <version>6.1.18</version>
</plugin>

For contributions that have this, for example, 
learning-more/binding-jsonrpc/contribution-calculator-webapp, do the following

cd learning-more/binding-jsonrpc/contribution-calculator-webapp
mvn jetty:run

This will launch the contribution in the Jetty runtime and then wait. At this point you can use
HTTP clients to send messages to services that the running SCA applcation exposes. For this 
example try pointing your browser at:

http://localhost:8080/sample-contribution-binding-jsonrpc-calculator-webapp/