snaker-core/src/main/java/org/snaker/engine/access/jdbc/JdbcHelper.java
public static DataSource getDataSource() {
		if(dataSource == null) {
			synchronized (JdbcHelper.class) {
				if(dataSource == null) {
					initialize();
				}
			}
		}
		AssertHelper.notNull(dataSource);
		return dataSource;
	}
public static DataSource getDataSource() {
		if(dataSource == null) {
			synchronized (JdbcHelper.class) {
				if(dataSource == null) {
					initialize();
				}
			}
		}
		AssertHelper.notNull(dataSource);
		return dataSource;
	}
返回数据源dataSource
@return