How to configure datasource with HikariCP in Spring @Configuration class?

Question

I'm trying to configure HikariCP datasource in Spring @Configuration class[Database being oracle]. But it's not working.

I searched in the internet and found that HikariCP datasource needs to be configured with constructor. I have tried this [the way it's mentioned in their github webpage], but it still not working. Please help me in solving this problem.

private HikariDataSource dataSource() {
    final HikariDataSource ds = new HikariDataSource();
    ds.setMaximumPoolSize(100); 
    ds.setDataSourceClassName("oracle.jdbc.driver.OracleDriver"); 
    ds.addDataSourceProperty("url", "jdbc:oracle:thin:@localhost:1521:XE"); 
    ds.addDataSourceProperty("user", "username");
    ds.addDataSourceProperty("password", "password");
    ds.addDataSourceProperty("cachePrepStmts", true); 
    ds.addDataSourceProperty("prepStmtCacheSize", 250); 
    ds.addDataSourceProperty("prepStmtCacheSqlLimit", 2048); 
    ds.addDataSourceProperty("useServerPrepStmts", true);
    return ds;
} 

Answer 1

You can check out our example in the wiki here:

https://github.com/brettwooldridge/HikariCP/wiki/Spring-Hibernate-with-Annotations

As covered by this article:

http://www.3riverdev.com/blog/tutorial-spring-hibernate-hikaricp/

EDIT: The code provided above is incorrect. You are trying to use MySQL DataSource properties for an Oracle DataSource. And now you're mixing up a Driver-based configuration with a DataSource-based one. Simplify it:

Driver:

private HikariDataSource dataSource() {
   final HikariDataSource ds = new HikariDataSource();
   ds.setMaximumPoolSize(100);
   ds.setDriverClassName("oracle.jdbc.driver.OracleDriver"); 
   ds.setJdbcUrl("jdbc:oracle:thin:@localhost:1521:XE"); ;
   ds.setUsername("username");
   ds.setPassword("password");
   return ds;
}

OR DataSource:

private HikariDataSource dataSource() {
   final HikariDataSource ds = new HikariDataSource();
   ds.setMaximumPoolSize(100);
   ds.setDataSourceClassName("oracle.jdbc.pool.OracleDataSource");
   ds.addDataSourceProperty("serverName", "yourServer");
   ds.addDataSourceProperty("port", "1521");
   ds.addDataSourceProperty("databaseName", "XE");
   ds.addDataSourceProperty("user", "username");
   ds.addDataSourceProperty("password", "password");
   return ds;
}

Also, 100 connection is way to big for Oracle unless you are running 20K transactions per-second, 10-20 is more reasonable.

Answer 2

Something like the following should fit your needs:

@Bean
public DataSource dataSource() {
     HikariConfig config = new HikariConfig();
     config.setMaximumPoolSize(100);
     config.setDataSourceClassName("oracle.jdbc.pool.OracleDataSource");
     config.addDataSourceProperty("serverName", "localhost");
     config.addDataSourceProperty("port", "1521");
     config.addDataSourceProperty("databaseName", "XE");
     config.addDataSourceProperty("user", "yourUser");
     config.addDataSourceProperty("password", "yourPassword");

     return new HikariDataSource(config);
}