org.apache.hadoop.hive.metastore.datasource.DataSourceProviderFactory.java Source code

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Here is the source code for org.apache.hadoop.hive.metastore.datasource.DataSourceProviderFactory.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.hadoop.hive.metastore.datasource;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.metastore.conf.MetastoreConf;

/**
 * Create a DataSourceProvider for a connectionPool configured in a hadoop
 * Configuration object.
 */
public abstract class DataSourceProviderFactory {

    private static final ImmutableList<DataSourceProvider> FACTORIES = ImmutableList.<DataSourceProvider>builder()
            .add(new HikariCPDataSourceProvider(), new BoneCPDataSourceProvider(), new DbCPDataSourceProvider())
            .build();

    /**
     * @param hdpConfig hadoop configuration
     * @return factory for the configured datanucleus.connectionPoolingType
     */
    public static DataSourceProvider getDataSourceProvider(Configuration hdpConfig) {

        for (DataSourceProvider factory : FACTORIES) {

            if (factory.supports(hdpConfig)) {
                return factory;
            }
        }
        return null;
    }

    /**
     * @param hdpConfig hadoop configuration
     * @return true if the configuration contains settings specifically aimed for one
     * of the supported conntection pool implementations.
     */
    public static boolean hasProviderSpecificConfigurations(Configuration hdpConfig) {

        String poolingType = MetastoreConf.getVar(hdpConfig, MetastoreConf.ConfVars.CONNECTION_POOLING_TYPE)
                .toLowerCase();

        return Iterables.any(hdpConfig, entry -> {
            String key = entry.getKey();
            return key != null && (key.startsWith(poolingType));
        });
    }

}