Thursday 28 August 2014

Converting variable base DS info into JNDI

This was quite an issue for me since a while.
There are 3 ways to put in the Data source info into a tomcat.
1- put it in context.xml directly which will save time and effort.
2- put into server.xml as global naming resources and then add an entry into context.xml for global resource link
3- put as variables into catalina.properties and then link them in server.xml and context.xml which is the longest way !

below is a script that changes the variable notation to the server.xml notation.
Also will print out the resource link for context.xml:

below is how the ds info got from catalina.properties look like:

[root@Beren DS]# head ds_info
aaa.conf.datasource1.name=configDataSource

aaa.conf.datasource1.url=jdbc:oracle:thin:@(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP)(HOST = orcl_host)(PORT = 1527))(CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = orcl)))
aaa.conf.datasource1.username=sherif
aaa.conf.datasource1.password=mydspassword

aaa.conf.datasource2.name=tstDataSource
aaa.conf.datasource2.url=jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=orcl_host)(PORT=1700))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=test)))
aaa.conf.datasource2.username=test
aaa.conf.datasource2.password=test
[root@Beren DS]#


Below is the script:

[root@Beren DS]# cat fix.sh                             
#set -x                                                 
OLD_IFS=${IFS}                                          
IFS='                                                   
'                                                       
for line in `cat ds_info`                               
do                                                      
        VAR=`echo ${line}|cut -d"=" -f1|cut -d"." -f4`  
        VAL="`echo ${line}|cut -d"=" -f2-`"             

        if [ "${VAR}" = "name" ]
        then                   
                echo '<Resource name="jdbc/'"${VAL}"'"'
                echo 'auth="Container" type="javax.sql.DataSource"'
        fi                                                        
        if [ "${VAR}" = "url" ]                                   
        then
                echo 'url="'"${VAL}"'"'
                echo 'driverClassName="oracle.jdbc.driver.OracleDriver"'
                echo 'maxActive="80"'
                echo 'maxIdle="20"'
                echo 'maxWait="10000"'
        fi
        if [ "${VAR}" = "username" ]
        then
                echo 'username="'"${VAL}"'"'
        fi
        if [ "${VAR}" = "password" ]
        then
                echo 'password="'""${VAL}'"'
                echo 'removeAbandoned="true"'
                echo 'removeAbandonedTimeout="60"'
                echo 'logAbandoned="true"'
                echo 'validationQuery="SELECT SYSDATE FROM DUAL"/>'
                echo " "

        fi
        #read
done

echo ""
echo "Context.xml"
echo ""

for line in `cat ds_info|grep "emc.conf.datasource.*\.name"`
do
        VAR=`echo ${line}|cut -d"=" -f1|cut -d"." -f4`
        VAL="`echo ${line}|cut -d"=" -f2-`"

        if [ "${VAR}" = "name" ]
        then
                echo ' <ResourceLink name="jdbc/'${VAL}'" global="jdbc/'${VAL}'" type="javax.sql.DataSource"/>'
        fi
        #read
done
[root@Beren DS]#

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