performance is slow while running a DB query using Struts - sql

Question

I am using Struts to build a web application. Application server is Tomcat Server 6, database is Oracle 11G. I am executing an action class which contains the following DB query:
SELECT BV_USER__TEMP.CEC_ID AS USER_ID,
BV_USER_BEHRCHY_TEMP.LEVEL_NUM AS LEVEL_NUM,
BV_IAM_BUSINESS_ENTITY_HIER.BUSINESS_ENTITY_HIER_NAME AS IAM__HIER_NAME,
'Total Development' AS TOTAL_ENGINEERING,
BV_IAM_BUSINESS_ENTITY_HIER.BUSINESS_HIER_NAME AS keyCol,
BV_USER_BE_HRCHY_TEMP.BUSINESS_ENTITY_DESCR AS val
FROM BV_IAM_BUSINESS_ENTITY_HIER IAM
INNER JOIN BV_SUB_BUSINESS_ENTITY BSE
ON (BV_USER_BE_HRCHY_TEMP.SUB_BUSINESS_ENTITY_DESCR =
BV_IAM_BUSINESS_ENTITY_HIER.BUSINESS_ENTITY_HIER_NAME)
WHERE IAM_ROLE_NAME='FIN BI_USER LEVEL ACCESS'
AND IAM_LEVEL_NUM=2
AND USER_ID=?
GROUP BY 1,2,3,4,5,6
UNION ALL
SELECT CEC_ID AS USER_ID,
BUSINESS_ENTITY_HIER_NAME.IAM_LEVEL_NUM AS LEVEL_NUM,
BUSINESS_ENTITY_HIER_NAME AS keyCol,
BV_USER_BE_HRCHY_TEMP.BUSINESS_ENTITY_DESCR AS val
FROM BV_IAM_BUSINESS_ENTITY_HIER IAM
INNER JOIN BV_SUB_BUSINESS_ENTITY BSE
ON (BUSINESS_ENTITY_NAME=BUSINESS_ENTITY_HIER_NAME)
WHERE BV_IAM_BUSINESS_ENTITY_HIER.IAM_ROLE_NAME='FIN BI_USER LEVEL ACCESS'
AND BV_IAM_BUSINESS_ENTITY_HIER.IAM_LEVEL_NUM=1
AND USER_id=2
GROUP BY 1,2,3,4,5,6
UNION ALL
SELECT BV_USER_BE_HRCHY_TEMP.USER_ID,
BV_IAM_BUSINESS_ENTITY_HIER.IAM_LEVEL_NUM AS LEVEL_NUM,
BV_IAM_BUSINESS_ENTITY_HIER.BUSINESS_ENTITY_HIER_NAME AS IAM_ENTITY_HIER_NAME,
'Total Development' AS TOTAL_ENGINEERING,
BUSINESS_ENTITY_HIER_NAME AS keyCol,
BV_USER_BE_HRCHY_TEMP.BUSINESS_ENTITY_DESCR AS val
FROM BV_IAM_BUSINESS_ENTITY_HIER IAM
CROSS JOIN BV_USER_BE_HRCHY_TEMP.SUB_BUSINESS_ENTITY_DESCR BSE
WHERE BV_IAM_BUSINESS_ENTITY_HIER.IAM_ROLE_NAME='FIN BI_USER LEVEL ACCESS'
AND BV_IAM_BUSINESS_ENTITY_HIER.IAM_LEVEL_NUM=0
AND USER_ID=?
GROUP BY 1,2,3,4,5,6;
In applicationContext.xml the bean:
<bean id="tablOrclDataSourceRead" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
<property name="url" value="jdbc:oracle:oci:#********DEV" />
<property name="username" value="username" />
<property name="password" value="password" />
<property name="initialSize" value="5" />
<property name="maxActive" value="5" />
<property name="maxIdle" value="0" />
<property name="minIdle" value="0" />
<property name="maxWait" value="-1" />
</bean>
JSON returned:
{"data":[
{"keyCol":"Utah","val":"Utah"},
{"keyCol":"Seattle","val":"Seattle"},
{"keyCol":Nebraska","val":"Nebraska"},
{"keyCol":"Enterprise Networking","val":"Enterprise Networking"}
]}
The time taken to execute the action (and return the JSON) with the above query is around 21 seconds.
Please let me know if I am missing something.
The same query when executed through SQL developer returns the result set in less than a second.