问题描述
我试图使用hive-jdbc.jar在WebSphere 8.5.5.11上设置JNDI数据源。
在WebSphere中使用控制台并使用表单创建新的JDBC提供程序时,会有一个用于实现类名称的字段。 WebSphere要求该类实现 javax.sql.XADataSource
或 javax.sql.ConnectionPoolDataSource
。但是,hive-jdbc驱动程序实现了非那些,它只实现 java.sql.DataSource
。
由于这个原因,它不起作用,WebSphere在尝试保存表单时报告错误。
,如果任何人想要请求支持添加对javax.sql.DataSource的支持。 / p>
I am trying to setup a JNDI Data Source on WebSphere 8.5.5.11, using hive-jdbc.jar.When using the console in WebSphere, and using the form to create a new JDBC provider, there is a field for the implementation class name. WebSphere requires that the class implements javax.sql.XADataSource
or javax.sql.ConnectionPoolDataSource
. However, the hive-jdbc driver implements non of those, it implements only java.sql.DataSource
.For this reason, it doesn't work, WebSphere reports an error when trying to save the form.
Any idea what can I do about this?
You can write a trivial implementation of javax.sql.ConnectionPoolDataSource
that delegates to the javax.sql.DataSource
implementation. Here is an example,
package example.datasource;
import java.sql.*;
import javax.sql.*;
public class HiveConnectionPoolDataSource extends org.apache.hive.jdbc.HiveDataSource implements ConnectionPoolDataSource {
public PooledConnection getPooledConnection() throws SQLException {
return new HivePooledConnection(null, null);
}
public PooledConnection getPooledConnection(String user, String password) throws SQLException {
return new HivePooledConnection(user, password);
}
public boolean isWrapperFor(Class<?> iface) throws SQLException {
return ConnectionPoolDataSource.class.equals(iface) || super.isWrapperFor(iface);
}
public <T> T unwrap(Class<T> iface) throws SQLException {
return ConnectionPoolDataSource.class.equals(iface) ? (T) this : super.unwrap(iface);
}
class HivePooledConnection implements PooledConnection {
private Connection con;
private final String user;
private final String password;
HivePooledConnection(String user, String password) {
this.user = user;
this.password = password;
}
public void addConnectionEventListener(ConnectionEventListener listener) {}
public void addStatementEventListener(StatementEventListener listener) {}
public void close() throws SQLException {
if (con != null) {
con.close();
con = null;
}
}
public Connection getConnection() throws SQLException {
if (con == null || con.isClosed()) {
con = user == null
? HiveConnectionPoolDataSource.this.getConnection()
: HiveConnectionPoolDataSource.this.getConnection(user, password);
return con;
} else
throw new IllegalStateException();
}
public void removeConnectionEventListener(ConnectionEventListener listener) {}
public void removeStatementEventListener(StatementEventListener listener) {}
}
}
Package your compiled class in a JAR alongside the JDBC driver JAR(s), and configure your custom JDBC provider in WebSphere Application Server to point at this JAR as though it were a part of the JDBC driver. Specify the implementation class name as example.datasource.HiveConnectionPoolDataSource
or whatever package/name you chose for your own implementation. You should then be able to use the JDBC driver.
Also adding a link to the WebSphere Application Server request for enhancements page if anyone wants to request that support for javax.sql.DataSource be added.
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