RiakConnectorFactory.java

/*
 * 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.basho.riak.presto;

import com.facebook.presto.spi.Connector;
import com.facebook.presto.spi.ConnectorFactory;
import com.facebook.presto.spi.type.TypeManager;
import com.google.common.base.Throwables;
import com.google.common.collect.ImmutableMap;
import com.google.inject.Injector;
import io.airlift.bootstrap.Bootstrap;
import io.airlift.json.JsonModule;

import java.util.Map;

import static com.google.common.base.Preconditions.checkNotNull;

public class RiakConnectorFactory
        implements ConnectorFactory {

    private final TypeManager typeManager;
    private final Map<String, String> optionalConfig;

    public RiakConnectorFactory(TypeManager typeManager, Map<String, String> optionalConfig) {
        this.typeManager = checkNotNull(typeManager, "typeManager is given as null");
        this.optionalConfig = ImmutableMap.copyOf(checkNotNull(optionalConfig, "optionalConfig is null"));
    }

    @Override
    public String getName() {
        return "riak";
    }

    @Override
    public Connector create(final String connectorId, Map<String, String> requiredConfig) {
        checkNotNull(requiredConfig, "requiredConfig is null");
        checkNotNull(optionalConfig, "optionalConfig is null");

        try {
            // A plugin is not required to use Guice; it is just very convenient
            Bootstrap app = new Bootstrap(
                    new JsonModule(),
                    new RiakModule(connectorId, typeManager));

            Injector injector = app
                    .strictConfig()
                    .doNotInitializeLogging()
                    .setRequiredConfigurationProperties(requiredConfig)
                    .setOptionalConfigurationProperties(optionalConfig)
                    .initialize();

            return injector.getInstance(RiakConnector.class);
        } catch (Exception e) {
            throw Throwables.propagate(e);
        }
    }
}