Cannot initialise HikariCP pooled connection, Failure in loading native library db2jcct2 - jdbc

Question

I'm trying to use HikariCP together with DB2 but get the following error:
Failure in loading native library db2jcct2,
java.lang.UnsatisfiedLinkError: db2jcct2
I have db2jcc4.jar file at my class path and only it.
And the following hikari properties file:
dataSourceClassName=com.ibm.db2.jcc.DB2SimpleDataSource
dataSource.user=username
dataSource.password=password
dataSource.databaseName=database
dataSource.serverName=server:50000
From what I understand Hikari tries to use type 2 driver and therefor it requires native library db2jcct2 is it right? And if yes, how can I say it implicitly to look for type 4 driver?
Update:
Proposed answer doesn't solve my issue. It can give direction but I could't get the correct answer only by reading that answer. At the same time you can find the answer in the comments to this question.

Answer 1

This question is equivalent to Why is DB2 Type 4 JDBC Driver looking for native library db2jcct2?
If you were configuring the DataSource in code you would need to do this:
// Assuming dataSource is a com.ibm.db2.jcc.DB2SimpleDataSource
dataSource.setDriverType(4);
DataSources are javabeans. The convention of javabeans is that a pair of setXxxx/getXxxrepresents the property xxxx. So a setter setDriverType is equivalent to the property driverType.
The hikari properties configure a datasource by defining the properties (which are then set through reflection). To do the equivalent of setDriverType(4), you need to use property driverType=4. Given the convention used in that properties file that leads to:
datasource.driverType=4

Answer 2

For DB2 type 4 driver, please try the following configuration.
<bean id="hikariConfig" class="com.zaxxer.hikari.HikariConfig">
<property name="poolName" value="springHikariCP" />
<property name="dataSourceClassName" value="com.ibm.db2.jcc.DB2SimpleDataSource"/>
<property name="maximumPoolSize" value="${db.maxTotal}" />
<property name="dataSourceProperties">
<props>
<prop key="driverType">4</prop>
<prop key="serverName">192.168.xxx.xxx</prop>
<prop key="databaseName">dbname</prop>
<prop key="portNumber">50000</prop>
<prop key="user">db2inst1</prop>
<prop key="password">password</prop>
</props>
</property>
<property name="jdbcUrl" value="${db.url}" />
<property name="username" value="${db.username}" />
<property name="password" value="${db.password}" />
</bean>
<bean id="dataSource" class="com.zaxxer.hikari.HikariDataSource" destroy-method="close">
<constructor-arg ref="hikariConfig" />
</bean>