Datasource question

Question

Hi. I have a number of jsp pages which contain code as follows:
<sql:setDataSource dataSource="jdbc/dbtest"/> <sql:query var="items" sql="SELECT * FROM homepagesubscriptions" > </sql:query>
Now my question is will performance of the app be affected due to referring to the datasource multiple times in these various jsp's. I am just trying to get my head around what a dataource is. I have configured the datasource in my tomcat context file. Am I right in thinking that when the web server starts up, the datasource is initialised once and everytime I reference the datasource from my app it is referring to this same datasource - in which case it is not negatively affecting performance.
thanks

Answer 1

i am using connection pooling. Here is what I have in my tomcat context file:
<Context reloadable="true" docBase="C:\struts2\website" >
     <Resource name="jdbc/dbtest"
          auth="Container"
          type="javax.sql.DataSource"
          factory="org.apache.commons.dbcp.BasicDataSourceFactory"
          driverClassName="com.mysql.jdbc.Driver"
          url="jdbc:mysql://localhost/website"
          username="root"
          password="xxxx"
          maxActive="20"
          maxIdle="10"
          maxWait="10000"
          removeAbandoned="true" />
     <Realm className="org.apache.catalina.realm.DataSourceRealm" debug="99"
          dataSourceName="jdbc/dbtest"
          digest="MD5"
                localDataSource="true"
          userTable="users" userNameCol="user_name" userCredCol="user_pass"
                userRoleTable="user_roles" roleNameCol="role_name"/>
</Context>thanks darted