Line data    Source code

       1             : #region Copyright
       2             : // // -----------------------------------------------------------------------
       3             : // // <copyright company="Chinchilla Software Limited">
       4             : // //   Copyright Chinchilla Software Limited. All rights reserved.
       5             : // // </copyright>
       6             : // // -----------------------------------------------------------------------
       7             : #endregion
       8             : 
       9             : using System;
      10             : using System.Collections.Generic;
      11             : using System.Linq;
      12             : using cdmdotnet.Logging;
      13             : using Cqrs.Azure.BlobStorage;
      14             : using Cqrs.Configuration;
      15             : using Cqrs.Events;
      16             : using Cqrs.Snapshots;
      17             : using Microsoft.WindowsAzure.Storage;
      18             : using Microsoft.WindowsAzure.Storage.Table;
      19             : 
      20             : namespace Cqrs.Azure.Storage.Events
      21             : {
      22             :         /// <summary>
      23             :         /// An Azure Storage based <see cref="SnapshotStore"/>.
      24             :         /// </summary>
      25             :         public class TableStorageSnapshotStore
      26             :                 : BlobStorage.Events.TableStorageSnapshotStore
      27           1 :         {
      28             :                 /// <summary>
      29             :                 /// Initializes a new instance of the <see cref="TableStorageSnapshotStore"/> class using the specified container.
      30             :                 /// </summary>
      31           1 :                 public TableStorageSnapshotStore(IConfigurationManager configurationManager, ISnapshotDeserialiser eventDeserialiser, ILogger logger, ICorrelationIdHelper correlationIdHelper, ISnapshotBuilder snapshotBuilder, ITableStorageSnapshotStoreConnectionStringFactory tableStorageSnapshotStoreConnectionStringFactory)
      32             :                         : base(configurationManager, eventDeserialiser, logger, correlationIdHelper, snapshotBuilder, tableStorageSnapshotStoreConnectionStringFactory, (logger1, tableStorageSnapshotStoreConnectionStringFactory1) => new RawTableStorageSnapshotStorer(logger1, tableStorageSnapshotStoreConnectionStringFactory1))
      33             :                 {
      34             :                 }
      35             : 
      36             :                 #region Overrides of SnapshotStore
      37             : 
      38             :                 /// <summary>
      39             :                 /// Get the latest <see cref="Snapshot"/> from storage.
      40             :                 /// </summary>
      41             :                 /// <returns>The most recent <see cref="Snapshot"/> of</returns>
      42           1 :                 protected override Snapshot Get(Type aggregateRootType, string streamName)
      43             :                 {
      44             :                         // Create the table query.
      45             :                         var rangeQuery = new TableQuery<DynamicTableEntity>().Where
      46             :                         (
      47             :                                 TableQuery.CombineFilters
      48             :                                 (
      49             :                                         TableQuery.GenerateFilterCondition("PartitionKey", QueryComparisons.Equal, StorageStore<object, object>.GetSafeStorageKey(streamName)),
      50             :                                         TableOperators.And,
      51             :                                         TableQuery.GenerateFilterCondition("AggregateId", QueryComparisons.Equal, streamName)
      52             :                                 )
      53             :                         );
      54             : 
      55             :                         var operationContext = new OperationContext();
      56             :                         Snapshot result = TableStorageStore.ReadableSource.ExecuteQuery(rangeQuery)
      57             : #pragma warning disable 0436
      58             :                                 .Select(eventData => EntityPropertyConverter.ConvertBack<EventData>(eventData.Properties, operationContext))
      59             : #pragma warning restore 0436
      60             : .Where(eventData => eventData.AggregateId == streamName)
      61             :                                 .OrderByDescending(eventData => eventData.Version)
      62             :                                 .Take(1)
      63             :                                 .Select(EventDeserialiser.Deserialise)
      64             :                                 .SingleOrDefault();
      65             : 
      66             :                         return result;
      67             :                 }
      68             : 
      69             :                 #endregion
      70             : 
      71             :                 /// <summary>
      72             :                 /// An Azure Storage based <see cref="TableStorageStore{TData,TCollectionItemData}"/>.
      73             :                 /// </summary>
      74             :                 public class RawTableStorageSnapshotStorer
      75             :                         : RawTableStorageSnapshotStore
      76           1 :                 {
      77             :                         /// <summary>
      78             :                         /// Initializes a new instance of the RawTableStorageSnapshotStorer class using the specified container.
      79             :                         /// </summary>
      80           1 :                         public RawTableStorageSnapshotStorer(ILogger logger, ITableStorageSnapshotStoreConnectionStringFactory tableStorageSnapshotStoreConnectionStringFactory)
      81             :                                 : base(logger, tableStorageSnapshotStoreConnectionStringFactory)
      82             :                         {
      83             :                         }
      84             : 
      85             :                         #region Overrides of StorageStore<EventData,CloudTable>
      86             : 
      87             :                         /// <summary>
      88             :                         /// The value differs from RawTableStorageEventStore.GetSafeSourceName(string) in that it appends "V2" to the end of the name.
      89             :                         /// </summary>
      90           1 :                         protected override string GetSafeSourceName(string sourceName)
      91             :                         {
      92             :                                 string tableName = base.GetSafeSourceName(sourceName);
      93             :                                 if (tableName.Length > 34)
      94             :                                         tableName = tableName.Substring(tableName.Length - 34);
      95             :                                 return string.Format("{0}V2", tableName);
      96             :                         }
      97             : 
      98             :                         #endregion
      99             : 
     100             :                         #region Overrides of TableStorageStore<EventData>
     101             : 
     102             :                         /// <summary>
     103             :                         /// Creates a new <see cref="DynamicTableEntity"/> copying the provided <paramref name="data"/>
     104             :                         /// into <see cref="DynamicTableEntity.Properties"/>.
     105             :                         /// </summary>
     106           1 :                         protected override ITableEntity CreateTableEntity(EventData data)
     107             :                         {
     108             :                                 var tableEntity = new EventDataTableEntity<EventData>(data);
     109             :                                 //Flatten object of type TData and convert it to EntityProperty Dictionary
     110             : #pragma warning disable 0436
     111             :                                 Dictionary<string, EntityProperty> flattenedProperties = EntityPropertyConverter.Flatten(data, new OperationContext());
     112             : #pragma warning restore 0436
     113             : 
     114             :                                 // Create a DynamicTableEntity and set its PK and RK
     115             :                                 DynamicTableEntity dynamicTableEntity = new DynamicTableEntity(tableEntity.PartitionKey, tableEntity.RowKey)
     116             :                                 {
     117             :                                         Properties = flattenedProperties
     118             :                                 };
     119             : 
     120             :                                 return dynamicTableEntity;
     121             :                         }
     122             : 
     123             :                         #endregion
     124             :                 }
     125             :         }
     126             : }