Coverage Report - co.stateful.core.DyCounter
 
Classes in this File Line Coverage Branch Coverage Complexity
DyCounter
0%
0/9
0%
0/10
1
DyCounter$AjcClosure1
0%
0/1
N/A
1
DyCounter$AjcClosure3
0%
0/1
N/A
1
 
 1  0
 /**
 2  
  * Copyright (c) 2014, stateful.co
 3  
  * All rights reserved.
 4  
  *
 5  
  * Redistribution and use in source and binary forms, with or without
 6  
  * modification, are permitted provided that the following conditions
 7  
  * are met: 1) Redistributions of source code must retain the above
 8  
  * copyright notice, this list of conditions and the following
 9  
  * disclaimer. 2) Redistributions in binary form must reproduce the above
 10  
  * copyright notice, this list of conditions and the following
 11  
  * disclaimer in the documentation and/or other materials provided
 12  
  * with the distribution. 3) Neither the name of the stateful.co nor
 13  
  * the names of its contributors may be used to endorse or promote
 14  
  * products derived from this software without specific prior written
 15  
  * permission.
 16  
  *
 17  
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 18  
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
 19  
  * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 20  
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 21  
  * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 22  
  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 23  
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 24  
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 25  
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 26  
  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 27  
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 28  
  * OF THE POSSIBILITY OF SUCH DAMAGE.
 29  
  */
 30  
 package co.stateful.core;
 31  
 
 32  
 import co.stateful.spi.Counter;
 33  
 import com.amazonaws.services.dynamodbv2.model.AttributeAction;
 34  
 import com.amazonaws.services.dynamodbv2.model.AttributeValue;
 35  
 import com.amazonaws.services.dynamodbv2.model.AttributeValueUpdate;
 36  
 import com.jcabi.aspects.Immutable;
 37  
 import com.jcabi.aspects.Loggable;
 38  
 import com.jcabi.dynamo.Item;
 39  
 import java.io.IOException;
 40  
 import java.math.BigDecimal;
 41  
 import lombok.EqualsAndHashCode;
 42  
 import lombok.ToString;
 43  
 
 44  
 /**
 45  
  * Counter in DynamoDB.
 46  
  *
 47  
  * @author Yegor Bugayenko (yegor@tpc2.com)
 48  
  * @version $Id$
 49  
  */
 50  
 @Immutable
 51  0
 @ToString
 52  0
 @EqualsAndHashCode(of = "item")
 53  
 @Loggable(Loggable.DEBUG)
 54  
 final class DyCounter implements Counter {
 55  
 
 56  
     /**
 57  
      * Item we're working with.
 58  
      */
 59  
     private final transient Item item;
 60  
 
 61  
     /**
 62  
      * Ctor.
 63  
      * @param itm Item
 64  
      */
 65  0
     DyCounter(final Item itm) {
 66  0
         this.item = itm;
 67  0
     }
 68  
 
 69  
     @Override
 70  
     public void set(final BigDecimal value) throws IOException {
 71  0
         this.item.put(
 72  
             DyCounters.ATTR_VALUE,
 73  
             new AttributeValueUpdate(
 74  
                 new AttributeValue().withN(value.toString()),
 75  
                 AttributeAction.PUT
 76  
             )
 77  
         );
 78  0
     }
 79  
 
 80  
     @Override
 81  
     public BigDecimal increment(final BigDecimal delta) throws IOException {
 82  0
         return new BigDecimal(
 83  
             this.item.put(
 84  
                 DyCounters.ATTR_VALUE,
 85  
                 new AttributeValueUpdate(
 86  
                     new AttributeValue().withN(delta.toString()),
 87  
                     AttributeAction.ADD
 88  
                 )
 89  
             ).get(DyCounters.ATTR_VALUE).getN()
 90  
         );
 91  
     }
 92  
 }