hive-metastore/src/main/java/org/apache/iceberg/hive/HiveCatalogs.java

/*
 * 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
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 */

package org.apache.iceberg.hive;

import com.github.benmanes.caffeine.cache.Cache;
import com.github.benmanes.caffeine.cache.Caffeine;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.conf.HiveConf;

public final class HiveCatalogs {

  private static final Cache<String, HiveCatalog> CATALOG_CACHE = Caffeine.newBuilder().build();

  private HiveCatalogs() {
  }

  public static HiveCatalog loadCatalog(Configuration conf) {
    // metastore URI can be null in local mode
    String metastoreUri = conf.get(HiveConf.ConfVars.METASTOREURIS.varname, "");
    return CATALOG_CACHE.get(metastoreUri, uri -> new HiveCatalog(conf));
  }
}