How do i configure connection pool as common for all applications

Hi Experts,

How do i configure connection pool as common for all applications.
I WANT TO MAKE it as common connection pool for all.

Application 1:
Connectin pool
maximumPoolSize is 20

<bean id="zapidDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
		destroy-method="close">

		<!-- Connection properties -->
		<property name="driverClass" value="com.mysql.jdbc.Driver" />

		<property name="jdbcUrl" value="${zapid.jdbc.url}" />
		<property name="user" value="${zapid.jdbc.username}" />
		<property name="password" value="${zapid.jdbc.password}" />

		<!-- Pool properties -->
		<property name="initialPoolSize" value="0" />

		<property name="minPoolSize" value="${c3p0.minPoolSize}" />

		<property name="maxPoolSize" value="${c3p0.maximumPoolSize}" />

		<!-- In milliseconds -->
		<property name="checkoutTimeout" value="20000" />

		<!-- In seconds -->
		<property name="maxIdleTime" value="300" />

		<!-- In seconds -->
		<property name="maxConnectionAge" value="600" />
		
</bean>

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Application 2:
maximumPoolSize is 20

i want to make this connection pool as common for both applications

maximumPoolSize is 40

how do i make changes

is it possible to do changes at tomcat level