Master -Slave Database Configuration With Hikari Pool - hikaricp

Question

I have two DataSource Beans one with #Primary annotation.
Individual Hikari pools are created for every DataSource.
I am trying to change the HikariDataSource from Pool 1(if connection is not available) to Pool 2 .
#Primary
#Bean(destroyMethod = "close", name = "dataSource")
public CustomHikariDataSource dataSource() throws SQLException {
try {
primaryDataSource = mainDataSource();
} catch (Exception e) {
primaryDataSource = secondaryDataSource();
}
HikariConfig config = new HikariConfig();
config.setDataSource(primaryDataSource);
config.setPoolName("POOL_PRIMARY");
config.setAllowPoolSuspension(true);
config.setIdleTimeout(10000);
config.setMaxLifetime(30000);
return new CustomHikariDataSource(config);
}
#Bean(destroyMethod = "close", name = "failoverDataSource")
public CustomHikariDataSource failoverDataSource() throws SQLException {
secondaryDataSource = secondaryDataSource();
HikariConfig config = new HikariConfig();
config.setDataSource(secondaryDataSource);
config.setPoolName("POOL_SECONDARY");
config.setAllowPoolSuspension(true);
return new CustomHikariDataSource(config);
}
private DataSource mainDataSource() {
return dataSourceProperties().initializeDataSourceBuilder().build();
}
private DataSource secondaryDataSource() {
return failoverDataSourceProperties().initializeDataSourceBuilder().build();
}
Where is the actual Problem?

Answer 1

Finally i am able to achieve it by Overriding getConnection() method from HikariDataSource.class
#Override
public Connection getConnection() throws SQLException {
if (isClosed()) {
throw new SQLException("HikariDataSource " + this + " has been closed.");
}
if (fastPathPool != null && (fastPathPool.poolState == 0 || fastPathPool.poolState == 1)) {
try {
fastPathPool.resumePool();
con = fastPathPool.getConnection();
} catch (Exception e) {
}
if (con.isClosed()) {
config = pool.config;
fastPathPool.suspendPool();
} else
return con;
}
config.setDataSource(dataSource);
config.setAllowPoolSuspension(true);
config.setMinimumIdle(minIdle);
pool = new HikariPool(config);
HikariPool result = pool;
if (result == null) {
synchronized (this) {
result = pool;
if (result == null) {
validate();
System.out.println("{} - Starting..." + getPoolName());
try {
pool = result = new HikariPool(this);
this.seal();
} catch (PoolInitializationException pie) {
if (pie.getCause() instanceof SQLException) {
throw (SQLException) pie.getCause();
} else {
throw pie;
}
}
System.out.println("{} - Start completed." + getPoolName());
}
}
}
return result.getConnection();
}
For complete class ,feel free to ping me.
Happy Coding ! :)