com.facebook.presto.spi.classloader.ClassLoaderSafeConnectorSplitManager Maven / Gradle / Ivy

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/*
 * 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.spi.classloader;

import com.facebook.presto.spi.ColumnHandle;
import com.facebook.presto.spi.ConnectorSplitManager;
import com.facebook.presto.spi.Partition;
import com.facebook.presto.spi.Split;
import com.facebook.presto.spi.TableHandle;

import java.util.List;
import java.util.Map;

@SuppressWarnings("UnusedDeclaration")
public final class ClassLoaderSafeConnectorSplitManager
        implements ConnectorSplitManager
{
    private final ConnectorSplitManager delegate;
    private final ClassLoader classLoader;

    public ClassLoaderSafeConnectorSplitManager(ConnectorSplitManager delegate, ClassLoader classLoader)
    {
        this.delegate = delegate;
        this.classLoader = classLoader;
    }

    @Override
    public String getConnectorId()
    {
        try (ThreadContextClassLoader threadContextClassLoader = new ThreadContextClassLoader(classLoader)) {
            return delegate.getConnectorId();
        }
    }

    @Override
    public boolean canHandle(TableHandle handle)
    {
        try (ThreadContextClassLoader threadContextClassLoader = new ThreadContextClassLoader(classLoader)) {
            return delegate.canHandle(handle);
        }
    }

    @Override
    public List getPartitions(TableHandle table, Map bindings)
    {
        try (ThreadContextClassLoader threadContextClassLoader = new ThreadContextClassLoader(classLoader)) {
            return delegate.getPartitions(table, bindings);
        }
    }

    @Override
    public Iterable getPartitionSplits(TableHandle table, List partitions)
    {
        try (ThreadContextClassLoader threadContextClassLoader = new ThreadContextClassLoader(classLoader)) {
            return delegate.getPartitionSplits(table, partitions);
        }
    }

    @Override
    public String toString()
    {
        try (ThreadContextClassLoader threadContextClassLoader = new ThreadContextClassLoader(classLoader)) {
            return delegate.toString();
        }
    }
}