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Presto - mongodb Connector

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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.mongodb;

import com.facebook.airlift.bootstrap.Bootstrap;
import com.facebook.airlift.json.JsonModule;
import com.facebook.presto.common.type.TypeManager;
import com.facebook.presto.spi.ConnectorHandleResolver;
import com.facebook.presto.spi.connector.Connector;
import com.facebook.presto.spi.connector.ConnectorContext;
import com.facebook.presto.spi.connector.ConnectorFactory;
import com.google.inject.Injector;

import java.util.Map;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Strings.isNullOrEmpty;
import static com.google.common.base.Throwables.throwIfUnchecked;
import static java.util.Objects.requireNonNull;

public class MongoConnectorFactory
        implements ConnectorFactory
{
    private final String name;

    public MongoConnectorFactory(String name)
    {
        checkArgument(!isNullOrEmpty(name), "name is null or empty");
        this.name = name;
    }

    @Override
    public String getName()
    {
        return name;
    }

    @Override
    public ConnectorHandleResolver getHandleResolver()
    {
        return new MongoHandleResolver();
    }

    @Override
    public Connector create(String catalogName, Map config, ConnectorContext context)
    {
        requireNonNull(config, "config is null");

        try {
            Bootstrap app = new Bootstrap(
                    new JsonModule(),
                    new MongoClientModule(),
                    binder -> binder.bind(TypeManager.class).toInstance(context.getTypeManager()));

            Injector injector = app.doNotInitializeLogging()
                    .setRequiredConfigurationProperties(config)
                    .initialize();

            return injector.getInstance(MongoConnector.class);
        }
        catch (Exception e) {
            throwIfUnchecked(e);
            throw new RuntimeException(e);
        }
    }
}