io.minio.BucketRegionCache Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of minio Show documentation

MinIO Java SDK for Amazon S3 Compatible Cloud Storage

There is a newer version: 8.5.17

/*
 * Minio Java Library for Amazon S3 Compatible Cloud Storage, (C) 2015 Minio, 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 io.minio;

import java.util.HashMap;
import java.util.Map;


/**
 * A singleton bucket/region cache map.
 */
enum BucketRegionCache {
  INSTANCE;
  private final Map regionMap = new HashMap<>();

  /**
   * Returns AWS region for given bucket name.
   */
  public String region(String bucketName) {
    if (bucketName == null) {
      return "us-east-1";
    }

    String region = this.regionMap.get(bucketName);
    if (region == null) {
      return "us-east-1";
    } else {
      return region;
    }
  }


  /**
   * Adds bucket name and its region to BucketRegionCache.
   */
  public void add(String bucketName, String region) {
    this.regionMap.put(bucketName, region);
  }


  /**
   * Removes region cache of the bucket if any.
   */
  public void remove(String bucketName) {
    if (bucketName != null) {
      this.regionMap.remove(bucketName);
    }
  }


  /**
   * Returns true if given bucket name is in the map else false.
   */
  public boolean exists(String bucketName) {
    if (this.regionMap.get(bucketName) == null) {
      return false;
    } else {
      return true;
    }
  }
}