public ConnectionHandler(ConnectionConfig conConfig) {
this.conConfig = conConfig;
if (conConfig.isPooled()) {
initializeConnectionPool();
} else {
try {
Class.forName(conConfig.getDriver());
} catch (ClassNotFoundException e) {
throw new IllegalStateException(
"The configured driver '" + conConfig.getDriver() + "' can not be found.");
}
}
}
private void initializeConnectionPool() {
try {
log.info("Initializing connection " + conConfig.getId());
// DBCP properties used to create the BasicDataSource
Properties dbcpProperties = new Properties();
// DriverClass & url
dbcpProperties.put("driverClassName", conConfig.getDriver());
dbcpProperties.put("url", conConfig.getUrl());
// Username / password
dbcpProperties.put("username", conConfig.getUsername());
dbcpProperties.put("password", conConfig.getPassword());
// Pool size
dbcpProperties.put("maxActive", Integer.toString(conConfig.getPoolSize()));
// Let the factory create the pool
ds = (BasicDataSource) BasicDataSourceFactory.createDataSource(dbcpProperties);
ds.setMaxWait(conConfig.getMaxWait()); // wait max before throwing an exception.
ds.setTestOnBorrow(true);
ds.setValidationQuery(conConfig.getValidationQuery());
if (!conConfig.isLazyInit()) {
// The BasicDataSource has lazy initialization
// borrowing a connection will start the DataSource
// and make sure it is configured correctly.
Connection conn = ds.getConnection();
conn.close();
}
} catch (Throwable e) {
String message = "Unable to create DHCP pool... ";
log.fatal(message, e);
if (ds != null) {
try {
ds.close();
} catch (Exception e2) {
// ignore
}
ds = null;
}
}
log.info("Configure ConnectionHandler '" + conConfig.getId() + "' complete");
}