/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.drill.jdbc.proxy;
import org.apache.drill.test.DrillTest;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.Driver;
import java.sql.DriverManager;
import java.sql.SQLException;
import org.junit.Ignore;
import org.junit.Test;
import static org.junit.Assert.assertThat;
import static org.hamcrest.CoreMatchers.*;
// NOTE: Currently, must not inherit from anything that loads the Drill driver
// class (and must not be run in JVM where the Drill driver class has already
// been loaded).
/**
* Test of TracingProxyDriver's loading of driver class.
*/
public class TracingProxyDriverClassLoadingTest extends DrillTest {
@Ignore( "except when run in own JVM (so Drill Driver not already loaded)" )
@Test
public void testClassLoading() throws SQLException, ClassNotFoundException {
// Note: Throwing exceptions for test setup problems so they're JUnit
// errors (red in Eclipse's JUnit view), not just JUnit test failures
// (blue in Eclipse).
// 1. Confirm that Drill driver is not loaded/registered.
try {
DriverManager.getDriver( "jdbc:drill:zk=local" );
throw new IllegalStateException(
"Drill driver seems loaded already; can't test loading." );
}
catch ( SQLException e ) {
// (Message as of JDK 1.7.)
assertThat( "Not expected messsage. (Did JDK change?)",
e.getMessage(), equalTo( "No suitable driver" ) );
}
try {
DriverManager.getConnection( "jdbc:drill:zk=local", null );
throw new IllegalStateException(
"Drill driver seems loaded already; can't test loading." );
}
catch ( SQLException e ) {
// (Message form as of JDK 1.7.)
assertThat( "Not expected messsage. (Did JDK change?)",
e.getMessage(),
equalTo( "No suitable driver found for jdbc:drill:zk=local" ) );
}
// 2. Confirm that TracingProxyDriver is not loaded/registered.
try {
DriverManager.getDriver( "jdbc:proxy::jdbc:drill:zk=local" );
throw new IllegalStateException(
"Proxy driver seems loaded already; can't test loading." );
}
catch ( SQLException e ) {
assertThat( "Not expected messsage. (Did JDK change?)",
e.getMessage(), equalTo( "No suitable driver" ) );
}
try {
DriverManager.getConnection( "jdbc:proxy::jdbc:drill:zk=local", null );
throw new IllegalStateException(
"Proxy driver seems loaded already; can't test loading." );
}
catch ( SQLException e ) {
assertThat(
"Not expected messsage. (Did JDK change?)",
e.getMessage(),
equalTo( "No suitable driver found for jdbc:proxy::jdbc:drill:zk=local" ) );
}
// 3. Load TracingProxyDriver.
Class.forName( "org.apache.drill.jdbc.proxy.TracingProxyDriver" );
// 4. Confirm that Drill driver still is not registered.
try {
DriverManager.getConnection( "jdbc:proxy::jdbc:drill:zk=local", null );
throw new IllegalStateException(
"Drill driver seems loaded already; can't test loading." );
}
catch ( ProxySetupSQLException e ) {
assertThat(
"Not expected messsage. (Was it just modified?)",
e.getMessage(),
equalTo(
"Error getting driver from DriverManager for proxied URL"
+ " \"jdbc:drill:zk=local\" (from proxy driver URL"
+ " \"jdbc:proxy::jdbc:drill:zk=local\" (after third colon))"
+ ": java.sql.SQLException: No suitable driver" ) );
}
// 5. Test that TracingProxyDriver can load and use a specified Driver class.
final Driver driver =
DriverManager.getDriver(
"jdbc:proxy:org.apache.drill.jdbc.Driver:jdbc:drill:zk=local" );
assertThat( driver.acceptsURL( "jdbc:proxy::jdbc:drill:zk=local" ),
equalTo( true ) );
assertThat( driver.acceptsURL( "jdbc:drill:zk=local" ), equalTo( false ) );
// 7. Test minimally that driver can get connection that works.
final Connection proxyConnection =
DriverManager.getConnection( "jdbc:proxy::jdbc:drill:zk=local", null );
assertThat( proxyConnection, notNullValue() );
final DatabaseMetaData dbMetaData = proxyConnection.getMetaData();
assertThat( dbMetaData, instanceOf( DatabaseMetaData.class ) );
}
} // class TracingProxyDriverClassLoadingTest