/*
 * 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.hudi.aws.transaction.lock;

import org.apache.hudi.common.config.LockConfiguration;
import org.apache.hudi.common.lock.LockProvider;
import org.apache.hudi.common.util.hash.HashID;

import org.apache.hadoop.conf.Configuration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.apache.hudi.common.util.StringUtils;
import software.amazon.awssdk.services.dynamodb.DynamoDbClient;

import javax.annotation.concurrent.NotThreadSafe;

import static org.apache.hudi.common.fs.FSUtils.s3aToS3;

/**
 * A DynamoDB based lock.
 * It implicitly derives the partition key from the hudi table name and hudi table base path
 * available in the lock configuration.
 */
@NotThreadSafe
public class DynamoDBBasedImplicitPartitionKeyLockProvider extends DynamoDBBasedLockProviderBase {
  protected static final Logger LOG = LoggerFactory.getLogger(DynamoDBBasedImplicitPartitionKeyLockProvider.class);

  private final String hudiTableBasePath;

  public DynamoDBBasedImplicitPartitionKeyLockProvider(final LockConfiguration lockConfiguration, final Configuration conf) {
    this(lockConfiguration, conf, null);
  }

  public DynamoDBBasedImplicitPartitionKeyLockProvider(
      final LockConfiguration lockConfiguration, final Configuration conf, DynamoDbClient dynamoDB) {
    super(lockConfiguration, conf, dynamoDB);
    hudiTableBasePath = s3aToS3(lockConfiguration.getConfig().getString(LockProvider.BASE_PATH_CONFIG_KEY));
  }

  @Override
  public String getDynamoDBPartitionKey(LockConfiguration lockConfiguration) {
    // Ensure consistent format for S3 URI.
    String hudiTableBasePathNormalized = s3aToS3(lockConfiguration.getConfig().getString(LockProvider.BASE_PATH_CONFIG_KEY));
    String partitionKey = HashID.generateXXHashAsString(hudiTableBasePathNormalized, HashID.Size.BITS_64);
    LOG.info(String.format("The DynamoDB partition key of the lock provider for the base path %s is %s",
        hudiTableBasePathNormalized, partitionKey));
    return partitionKey;
  }

  @Override
  protected String generateLogSuffixString() {
    return StringUtils.join("DynamoDb table = ", tableName,
        ", partition key = ", dynamoDBPartitionKey,
        ", hudi table base path = ", hudiTableBasePath);
  }
}
