com.netflix.metacat.s3.connector.S3Plugin.java Source code

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Here is the source code for com.netflix.metacat.s3.connector.S3Plugin.java

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/*
 * Copyright 2016 Netflix, Inc.
 *    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.netflix.metacat.s3.connector;

import com.facebook.presto.spi.ConnectorFactory;
import com.facebook.presto.spi.Plugin;
import com.facebook.presto.spi.type.Type;
import com.facebook.presto.spi.type.TypeManager;
import com.facebook.presto.type.FloatType;
import com.facebook.presto.type.IntType;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;

import javax.inject.Inject;
import java.util.List;
import java.util.Map;

/**
 * S3 plugin.
 */
public class S3Plugin implements Plugin {
    private TypeManager typeManager;
    private Map<String, String> optionalConfig = ImmutableMap.of();

    @Override
    public synchronized void setOptionalConfig(final Map<String, String> optionalConfig) {
        this.optionalConfig = ImmutableMap
                .copyOf(Preconditions.checkNotNull(optionalConfig, "optionalConfig is null"));
    }

    @Inject
    public synchronized void setTypeManager(final TypeManager typeManager) {
        this.typeManager = typeManager;
    }

    public synchronized Map<String, String> getOptionalConfig() {
        return optionalConfig;
    }

    @Override
    public synchronized <T> List<T> getServices(final Class<T> type) {
        if (type == ConnectorFactory.class) {
            return ImmutableList
                    .of(type.cast(new S3ConnectorFactory(typeManager, getOptionalConfig(), getClassLoader())));
        } else if (type == Type.class) {
            return ImmutableList.of(type.cast(FloatType.FLOAT), type.cast(IntType.INT));
        }
        return ImmutableList.of();
    }

    private static ClassLoader getClassLoader() {
        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
        if (classLoader == null) {
            classLoader = S3Plugin.class.getClassLoader();
        }
        return classLoader;
    }
}