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Presto - Google Sheets 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 io.prestosql.plugin.google.sheets;

import io.airlift.bootstrap.LifeCycleManager;
import io.prestosql.spi.connector.Connector;
import io.prestosql.spi.connector.ConnectorMetadata;
import io.prestosql.spi.connector.ConnectorRecordSetProvider;
import io.prestosql.spi.connector.ConnectorSplitManager;
import io.prestosql.spi.connector.ConnectorTransactionHandle;
import io.prestosql.spi.transaction.IsolationLevel;

import javax.inject.Inject;

import static io.prestosql.plugin.google.sheets.SheetsTransactionHandle.INSTANCE;
import static java.util.Objects.requireNonNull;

public class SheetsConnector
        implements Connector
{
    private final LifeCycleManager lifeCycleManager;
    private final SheetsMetadata metadata;
    private final SheetsSplitManager splitManager;
    private final SheetsRecordSetProvider recordSetProvider;

    @Inject
    public SheetsConnector(
            LifeCycleManager lifeCycleManager,
            SheetsMetadata metadata,
            SheetsSplitManager splitManager,
            SheetsRecordSetProvider recordSetProvider)
    {
        this.lifeCycleManager = requireNonNull(lifeCycleManager, "lifeCycleManager is null");
        this.metadata = requireNonNull(metadata, "metadata is null");
        this.splitManager = requireNonNull(splitManager, "splitManager is null");
        this.recordSetProvider = requireNonNull(recordSetProvider, "recordSetProvider is null");
    }

    @Override
    public ConnectorTransactionHandle beginTransaction(IsolationLevel isolationLevel, boolean readOnly)
    {
        return INSTANCE;
    }

    @Override
    public ConnectorMetadata getMetadata(ConnectorTransactionHandle transactionHandle)
    {
        return metadata;
    }

    @Override
    public ConnectorSplitManager getSplitManager()
    {
        return splitManager;
    }

    @Override
    public ConnectorRecordSetProvider getRecordSetProvider()
    {
        return recordSetProvider;
    }

    @Override
    public final void shutdown()
    {
        lifeCycleManager.stop();
    }
}