content: /*
   * 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.asterix.common.transactions;
  
  import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException;
  
  public interface ITxnIdFactory {
      /**
       * Creates a new unique transaction id.  The implementation must ensure this id is unique within the cluster
       *
       * @return the new transaction id
       */
      TxnId create() throws AlgebricksException;
  
      long getIdBlock(int blockSize);
  
      /**
       * Ensure that future transaction ids are larger than the supplied id
       *
       * @param id
       *            the value to ensure future created transaction ids are larger than
       */
      void ensureMinimumId(long id);
  
      /**
       * The highest transaction id this factory has created
       *
       * @return the max transaction id
       */
      long getMaxTxnId();
  }
  