private void LoadTableMetaData()
{
// Try to load the partition meta data from the existing table (which contains a list of the partition keys in the table).
_partitionMetaDataEntityWrapper = _tableMetaDataContext.FindAsync(CtConstants.TableMetaDataPartitionKey, CtConstants.PartitionSchemasRowKey).Result;
// Set the default PartitionKey using the combination below in case there are more than one CloudTableContext objects
// on the same table.
_defaultIndexDefinitionName = $"DefaultIndex_ofType_{typeof(TDomainEntity).Name}";
if (_partitionMetaDataEntityWrapper != null)
{
/* This is going through and populating the local PartitionKeysInTable property with the list of keys retrieved
* from the Azure table.
* This also checks to see if there is a PartitionKey for the table meta data and the DefaultPartition
* and adds that if there isn't*/
var metaDataPkIsInList = false;
foreach (var partitionKeyString in _partitionMetaDataEntityWrapper.DomainObjectInstance.PartitionKeys)
{
if (partitionKeyString == CtConstants.TableMetaDataPartitionKey)
{
metaDataPkIsInList = true;
}
var isInList = IndexNameKeysInTable.Contains(partitionKeyString);
if (!isInList)
{
IndexNameKeysInTable.Add(partitionKeyString);
}
}
if (!metaDataPkIsInList)
{
IndexNameKeysInTable.Add(CtConstants.TableMetaDataPartitionKey);
}
// The RowKey for the DefaultSchema is set by the given ID property of the TDomainEntity object
DefaultIndex = CreateIndexDefinition(_defaultIndexDefinitionName)
.DefineIndexCriteria(entity => true)
.SetIndexedPropertyCriteria(entity => entity.GetType().Name); // Enables searching directly on the type.
if (IndexDefinitions.All(indexDefinition => indexDefinition.IndexNameKey != DefaultIndex.IndexNameKey))
{
AddIndexDefinition(DefaultIndex);
}
}
else
{
/* Creates a new partition meta data entity and adds the appropriate default partitions and metadata partitions*/
_partitionMetaDataEntityWrapper = new TableEntityWrapper <PartitionMetaData>(CtConstants.TableMetaDataPartitionKey, CtConstants.PartitionSchemasRowKey);
DefaultIndex = CreateIndexDefinition(_defaultIndexDefinitionName)
.DefineIndexCriteria(entity => true)
.SetIndexedPropertyCriteria(entity => entity.GetType().Name); // Enables searching directly on the type
AddIndexDefinition(DefaultIndex);
}
}
/// <summary>
/// Asynchronously gets a domain entity by the ID using the given entityId and based on the index defined by the given indexNameKey.
/// If the indexNameKey parameter is left null then the <see cref="DefaultIndex"/> is used.
/// </summary>
/// <param name="entityId">Value of the ID property to be used in finding by the ID. This object will get serialized to JSON before being used in the query</param>
/// <param name="indexNameKey">Optional name of the index used when searching for items by ID. The <see cref="DefaultIndex"/> is usually the one that holds the ID index</param>
/// <returns></returns>
public async Task <TDomainEntity> GetByIdAsync(object entityId, string indexNameKey = null)
{
if (entityId == null)
{
return(null);
}
var serializedEntityId = JsonConvert.SerializeObject(entityId);
if (indexNameKey == null)
{
indexNameKey = DefaultIndex.IndexNameKey;
}
var tableEntity = await TableOperationsService.FindAsync(indexNameKey, serializedEntityId).ConfigureAwait(false);
return(tableEntity.DomainObjectInstance);
}
