/*
* Licensed 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 com.facebook.presto.hive;
import com.facebook.presto.spi.ConnectorColumnHandle;
import com.facebook.presto.spi.ConnectorPageSource;
import com.facebook.presto.spi.ConnectorPageSourceProvider;
import com.facebook.presto.spi.ConnectorSplit;
import com.facebook.presto.spi.classloader.ThreadContextClassLoader;
import java.util.List;
import static com.google.common.base.Preconditions.checkNotNull;
public class ClassLoaderSafeConnectorPageSourceProvider
implements ConnectorPageSourceProvider
{
private final ConnectorPageSourceProvider delegate;
private final ClassLoader classLoader;
public ClassLoaderSafeConnectorPageSourceProvider(ConnectorPageSourceProvider delegate, ClassLoader classLoader)
{
this.delegate = checkNotNull(delegate, "delegate is null");
this.classLoader = checkNotNull(classLoader, "classLoader is null");
}
@Override
public ConnectorPageSource createPageSource(ConnectorSplit split,
List<ConnectorColumnHandle> columns)
{
try (ThreadContextClassLoader ignored = new ThreadContextClassLoader(classLoader)) {
return delegate.createPageSource(split, columns);
}
}
@Override
public String toString()
{
try (ThreadContextClassLoader ignored = new ThreadContextClassLoader(classLoader)) {
return delegate.toString();
}
}
}