public UUIDIndex(string indexName, IndexKeyDefinition idxKey, GraphDBType correspondingType, string indexType = null, string indexEdition = DBConstants.DEFAULTINDEX)
{
IndexName = indexName;
IndexEdition = indexEdition;
IndexKeyDefinition = idxKey;
IndexRelatedTypeUUID = correspondingType.UUID;
if (indexEdition == null)
{
IndexEdition = DBConstants.DEFAULTINDEX;
}
else
{
IndexEdition = indexEdition;
}
if (String.IsNullOrEmpty(indexType))
{
IndexType = "UUIDIndex";
}
else
{
IndexType = indexType;
}
#region Workaround for current IndexOperation of InOperator - just follow the IsListOfBaseObjectsIndex property
IsListOfBaseObjectsIndex = false;
#endregion
FileSystemLocation = (correspondingType.ObjectLocation + "Indices") + (IndexName + "#" + IndexEdition);
}
public AttributeIndex(string indexName, IndexKeyDefinition idxKey, GraphDBType correspondingType, UInt16 myAttributeIdxShards, string indexType = null, string indexEdition = DBConstants.DEFAULTINDEX, UInt64 myKeyCount = 0, UInt64 myValueCount = 0)
{
IndexName = indexName;
IndexEdition = indexEdition;
IndexKeyDefinition = idxKey;
IndexRelatedTypeUUID = correspondingType.UUID;
AttributeIdxShards = myAttributeIdxShards;
_keyCount = myKeyCount;
_valueCount = myValueCount;
if (indexEdition == null)
{
IndexEdition = DBConstants.DEFAULTINDEX;
}
else
{
IndexEdition = indexEdition;
}
if (String.IsNullOrEmpty(indexType))
{
IndexType = VersionedHashIndexObject.Name;
}
else
{
IndexType = indexType;
}
#region Workaround for current IndexOperation of InOperator - just follow the IsListOfBaseObjectsIndex property
// better approach, use a special index key for a set of base objects
if (idxKey.IndexKeyAttributeUUIDs.Any(a =>
{
var typeAttr = correspondingType.GetTypeAttributeByUUID(a);
if (typeAttr != null && (typeAttr.EdgeType is IBaseEdge))
{
return true;
}
else
{
return false;
}
}))
{
IsListOfBaseObjectsIndex = true;
}
else
{
IsListOfBaseObjectsIndex = false;
}
#endregion
FileSystemLocation = (correspondingType.ObjectLocation + "Indices") + (IndexName + "#" + IndexEdition);
}
/// <summary>
/// Adds a single ADBBaseObject to the IndexKex
/// </summary>
/// <param name="myAttributeUUID">AttributeUUID corresponding to the ADBBaseObject</param>
/// <param name="myIndexKeyPayload">The ADBBaseObject that is going to be added</param>
/// <param name="myIndexDefinition">The corresponding IndexKeyDefinition</param>
public IndexKey(AttributeUUID myAttributeUUID, ADBBaseObject myIndexKeyPayload, IndexKeyDefinition myIndexDefinition)
{
if (!myIndexDefinition.IndexKeyAttributeUUIDs.Contains(myAttributeUUID))
{
throw new GraphDBException(new Error_IndexKeyCreationError(myAttributeUUID, myIndexKeyPayload, myIndexDefinition));
}
else
{
AddAAKey(myAttributeUUID, myIndexKeyPayload);
}
}
/// <summary>
/// Recommended way of creating a new IndexKey object.
/// </summary>
/// <param name="myIndexKeyValues">All ADBBaseObjects in relation with their AttributeUUID</param>
/// <param name="myIndexDefinition">The corresponding IndexKeyDefinition</param>
public IndexKey(Dictionary<AttributeUUID, ADBBaseObject> myIndexKeyValues, IndexKeyDefinition myIndexDefinition)
{
foreach (var aDefElement in myIndexDefinition.IndexKeyAttributeUUIDs)
{
if (!myIndexKeyValues.ContainsKey(aDefElement))
{
throw new GraphDBException(new Error_IndexKeyCreationError(aDefElement, null, myIndexDefinition));
}
else
{
AddAAKey(aDefElement, myIndexKeyValues[aDefElement]);
}
}
}
public Error_IndexAlreadyExistWithSameEditionAndAttribute(DBContext myDBContext, String myExistingIndexName , IndexKeyDefinition myIndexKeyDefinition, String myIndexEdition)
{
IndexEdition = myIndexEdition;
IndexKeyDefinition = myIndexKeyDefinition;
ExistingIndexName = myExistingIndexName;
try
{
if (myDBContext != null)
{
_IndexAttributes = IndexKeyDefinition.IndexKeyAttributeUUIDs.ToAggregatedString(a => a.ToString());
}
else
{
_IndexAttributes = IndexKeyDefinition.IndexKeyAttributeUUIDs.ToAggregatedString(a => a.ToString());
}
}
catch { }
}
public UUIDIndex(string indexName, IndexKeyDefinition idxKey, GraphDBType correspondingType, UInt16 myAttributeIdxShards, string indexType = null, string indexEdition = DBConstants.DEFAULTINDEX, UInt64 myKeyCount = 0)
{
IndexName = indexName;
IndexEdition = indexEdition;
IndexKeyDefinition = idxKey;
IndexRelatedTypeUUID = correspondingType.UUID;
AttributeIdxShards = myAttributeIdxShards;
_numberOfObjects = myKeyCount;
//valueCount is irrellevant, because valueCount = keyCount
if (indexEdition == null)
{
IndexEdition = DBConstants.DEFAULTINDEX;
}
else
{
IndexEdition = indexEdition;
}
if (String.IsNullOrEmpty(indexType))
{
IndexType = "UUIDIndex";
}
else
{
IndexType = indexType;
}
#region Workaround for current IndexOperation of InOperator - just follow the IsListOfBaseObjectsIndex property
IsListOfBaseObjectsIndex = false;
#endregion
FileSystemLocation = (correspondingType.ObjectLocation + "Indices") + (IndexName + "#" + IndexEdition);
}
public IEnumerable<AAttributeIndex> GetAttributeIndices(DBContext myDBContext, IndexKeyDefinition myIndexKeyDefinition)
{
if (_AttributeIndices.ContainsKey(myIndexKeyDefinition))
{
foreach (var aIdx in _AttributeIndices[myIndexKeyDefinition])
{
yield return aIdx.Value;
}
}
if (_AttributeIndexLocations.IsNotNullOrEmpty())
{
if (_AttributeIndexLocations.ContainsKey(myIndexKeyDefinition))
{
foreach (var aIdxEdition in _AttributeIndexLocations[myIndexKeyDefinition])
{
yield return LoadAttributeIndexFromLocation(myDBContext, myIndexKeyDefinition, aIdxEdition.Key).Value;
}
}
}
yield break;
}
/// <summary>
/// Returns the index of the given attribute
/// </summary>
/// <param name="myAttributeName">The name of the attribute we want an index for.</param>
/// <param name="myIndexEdition">The name of the index edition. May be null</param>
/// <returns>The index for the given myAttributes if one exist. Else, null.</returns>
public AAttributeIndex GetAttributeIndex(List<AttributeUUID> myAttributeNames, String myIndexEdition)
{
IndexKeyDefinition idxKey = new IndexKeyDefinition(myAttributeNames);
if (_AttributeIndices.ContainsKey(idxKey) && _AttributeIndices[idxKey].ContainsKey(myIndexEdition))
return _AttributeIndices[idxKey][myIndexEdition];
throw new GraphDBException(new Error_IndexDoesNotExist(myAttributeNames.ToAggregatedString(mySeperator: ", "), myIndexEdition));
}
public abstract Exceptional Initialize(DBContext myDBContext, string indexName, IndexKeyDefinition idxKey, GraphDBType correspondingType, string indexEdition = DBConstants.DEFAULTINDEX);
/// <summary>
/// Returns the index of the given attribute
/// </summary>
/// <param name="myAttributeUUID">The name of the attribute we want an index for.</param>
/// <param name="myIndexEdition">THe name of the index edition. May be null</param>
/// <returns>The index for the given myAttributes if one exist. Else, null.</returns>
public Exceptional<AAttributeIndex> GetAttributeIndex(DBContext myDBContext, IndexKeyDefinition idxKey, String myIndexEdition)
{
lock (_AttributeIndices)
{
if (_AttributeIndices.ContainsKey(idxKey))
{
if (myIndexEdition == null)
{
if (_AttributeIndices[idxKey].ContainsKey(DBConstants.DEFAULTINDEX))
return new Exceptional<AAttributeIndex>(_AttributeIndices[idxKey][DBConstants.DEFAULTINDEX]);
else
return new Exceptional<AAttributeIndex>(_AttributeIndices[idxKey].First().Value);
}
else if (_AttributeIndices[idxKey].ContainsKey(myIndexEdition))
{
return new Exceptional<AAttributeIndex>(_AttributeIndices[idxKey][myIndexEdition]);
}
}
else
{
if (_AttributeIndexLocations.IsNotNullOrEmpty())
{
if (_AttributeIndexLocations.ContainsKey(idxKey))
{
if (myIndexEdition == null)
{
if (_AttributeIndexLocations[idxKey].ContainsKey(DBConstants.DEFAULTINDEX))
{
return LoadAttributeIndexFromLocation(myDBContext, idxKey, DBConstants.DEFAULTINDEX);
}
else
{
return new Exceptional<AAttributeIndex>(new Error_IndexDoesNotExist(idxKey.ToString(), DBConstants.DEFAULTINDEX));
}
}
else if (_AttributeIndexLocations[idxKey].ContainsKey(myIndexEdition))
{
return LoadAttributeIndexFromLocation(myDBContext, idxKey, myIndexEdition);
}
}
}
}
}
return new Exceptional<AAttributeIndex>(new Error_IndexAttributeDoesNotExist(idxKey.ToString()));
}
public override void Deserialize(ref SerializationReader mySerializationReader)
{
UInt32 _Capacity;
if (mySerializationReader != null)
{
try
{
_UUID = new TypeUUID(this.ObjectUUID.GetByteArray());
ParentTypeUUID = new TypeUUID();
ParentTypeUUID.Deserialize(ref mySerializationReader);
_IsUserDefined = mySerializationReader.ReadBoolean();
_IsAbstract = mySerializationReader.ReadBoolean();
_Comment = mySerializationReader.ReadString();
_Capacity = mySerializationReader.ReadUInt32();
_Attributes = new Dictionary<AttributeUUID, TypeAttribute>();
_TypeAttributeLookupTable = new Dictionary<AttributeUUID, TypeAttribute>();
for (UInt32 i = 0; i < _Capacity; i++)
{
var _AttrAtrib = new AttributeUUID();
_AttrAtrib.Deserialize(ref mySerializationReader);
var _TypeObj = new TypeAttribute();
_TypeObj.Deserialize(ref mySerializationReader);
_Attributes.Add(_AttrAtrib, _TypeObj);
_TypeAttributeLookupTable.Add(_AttrAtrib, _TypeObj);
}
_Capacity = mySerializationReader.ReadUInt32();
_TypeSettings = new Dictionary<String, ADBSettingsBase>();
for (var i = 0; i < _Capacity; i++)
{
ADBSettingsBase _ADBSettingsBase = (ADBSettingsBase) mySerializationReader.ReadObject();
if(_ADBSettingsBase != null)
_TypeSettings.Add(_ADBSettingsBase.Name, _ADBSettingsBase);
}
_Capacity = mySerializationReader.ReadUInt32();
_UniqueAttributes = new List<AttributeUUID>();
AttributeUUID AttribID = null;
for (UInt32 i = 0; i < _Capacity; i++)
{
AttribID = new AttributeUUID(ref mySerializationReader);
_UniqueAttributes.Add(AttribID);
}
_Capacity = mySerializationReader.ReadUInt32();
_MandatoryAttributes = new HashSet<AttributeUUID>();
for (UInt32 i = 0; i < _Capacity; i++)
{
AttribID = new AttributeUUID(ref mySerializationReader);
_MandatoryAttributes.Add(AttribID);
}
ObjectDirectoryShards = mySerializationReader.ReadUInt16();
#region Indices
_AttributeIndices = new Dictionary<IndexKeyDefinition, Dictionary<String, AAttributeIndex>>();
_AttributeIndicesNameLookup = new Dictionary<String, IndexKeyDefinition>();
var idxCount = mySerializationReader.ReadUInt32();
for (var i = 0; i < idxCount; i++)
{
var idxKey = new IndexKeyDefinition();
idxKey.Deserialize(ref mySerializationReader);
//_AttributeIndices.Add(idxKey, new Dictionary<String, AttributeIndex>());
var idxVersionCount = mySerializationReader.ReadUInt32();
for (var j = 0; j < idxVersionCount; j++)
{
var key = mySerializationReader.ReadString();
var fileSystemLocation = new ObjectLocation(mySerializationReader.ReadString());
var indexEdition = mySerializationReader.ReadString();
var indexName = mySerializationReader.ReadString();
var indexType = mySerializationReader.ReadString();
var isUUIDIdx = mySerializationReader.ReadBoolean();
var keyCount = mySerializationReader.ReadUInt64();
var valueCount = mySerializationReader.ReadUInt64();
var attributeIdxShards = mySerializationReader.ReadUInt16();
//var CreateIdxExcept = CreateAttributeIndex(indexName, idxKey.IndexKeyAttributeUUIDs, indexEdition, indexObjectType, fileSystemLocation);
if (isUUIDIdx)
{
AddAttributeIndex(new UUIDIndex(indexName, idxKey, this, attributeIdxShards, indexType, indexEdition, keyCount));
}
else
{
AddAttributeIndex(new AttributeIndex(indexName, idxKey, this, attributeIdxShards, indexType, indexEdition, keyCount, valueCount));
}
//if (CreateIdxExcept.Failed())
// throw new GraphDBException(CreateIdxExcept.Errors);
}
}
#endregion
}
catch (Exception e)
{
throw new SerializationException("The GraphDBType could not be deserialized!\n\n" + e);
}
}
}
private IndexKey GenerateIndexKeyForUniqueConstraint(Dictionary<AttributeUUID, IObject> toBeCheckedForUniqueConstraint, IndexKeyDefinition myIndexKeyDefinition, GraphDBType myType)
{
var payload = new Dictionary<AttributeUUID, ADBBaseObject>();
TypeAttribute currentAttribute;
foreach (var aUnique in myIndexKeyDefinition.IndexKeyAttributeUUIDs)
{
currentAttribute = myType.GetTypeAttributeByUUID(aUnique);
if (!currentAttribute.GetDBType(_DBContext.DBTypeManager).IsUserDefined)
{
#region base attribute
if (toBeCheckedForUniqueConstraint.ContainsKey(aUnique))
{
switch (currentAttribute.KindOfType)
{
#region List/Set
case KindsOfType.ListOfNoneReferences:
case KindsOfType.SetOfNoneReferences:
throw new GraphDBException(new Error_NotImplemented(new System.Diagnostics.StackTrace(true), "Unique idx on list of base attributes is not implemented."));
#endregion
#region single/special
case KindsOfType.SpecialAttribute:
case KindsOfType.SingleNoneReference:
case KindsOfType.SingleReference:
payload.Add(aUnique, (ADBBaseObject)toBeCheckedForUniqueConstraint[aUnique]);
break;
#endregion
#region not implemented
case KindsOfType.SetOfReferences:
default:
throw new GraphDBException(new Error_NotImplemented(new System.Diagnostics.StackTrace(true), "Currently its not implemented to insert anything else than a List/Set/Single of base types"));
#endregion
}
}
else
{
//create default adbbaseobject
var defaultADBBAseObject = GraphDBTypeMapper.GetADBBaseObjectFromUUID(currentAttribute.DBTypeUUID);
defaultADBBAseObject.SetValue(DBObjectInitializeType.Default);
payload.Add(aUnique, defaultADBBAseObject);
}
#endregion
}
else
{
#region reference attribute
throw new GraphDBException(new Error_NotImplemented(new System.Diagnostics.StackTrace(true)));
#endregion
}
}
return new IndexKey(payload, myIndexKeyDefinition);
}
private Exceptional<AAttributeIndex> LoadAttributeIndexFromLocation(DBContext myDBContext, IndexKeyDefinition indexKeyDefinition, string indexEdition)
{
var idx = _AttributeIndexLocations[indexKeyDefinition][indexEdition];
_AttributeIndexLocations[indexKeyDefinition].Remove(indexEdition);
if (_AttributeIndexLocations[indexKeyDefinition].Count == 0)
{
_AttributeIndexLocations.Remove(indexKeyDefinition);
}
var loadResult = myDBContext.IGraphFSSession.GetFSObject<AAttributeIndex>(idx.Item2,
DBConstants.DBINDEXSTREAM,
() => myDBContext.DBPluginManager.GetIndex(idx.Item1).Value, indexEdition);
if (!_AttributeIndices.ContainsKey(indexKeyDefinition))
{
_AttributeIndices.Add(indexKeyDefinition, new Dictionary<string, AAttributeIndex>());
}
_AttributeIndices[indexKeyDefinition][indexEdition] = loadResult.Value;
_AttributeIndicesNameLookup.Add(loadResult.Value.IndexName, loadResult.Value.IndexKeyDefinition);
return loadResult;
}
public Exceptional<Boolean> RebuildIndices(IEnumerable<GraphDBType> myUserDefinedTypes)
{
#region Remove old attribute indices
foreach (var _UserDefinedType in myUserDefinedTypes)
{
foreach (var _AttributeIndex in _UserDefinedType.GetAllAttributeIndices(_DBContext, includeUUIDIndices: false))
{
// Clears the index and removes it from the file system!
_AttributeIndex.Clear(_DBContext, _UserDefinedType);
}
}
#endregion
foreach (var _UserDefinedType in myUserDefinedTypes)
{
var _DBObjectsLocation = new ObjectLocation(_UserDefinedType.ObjectLocation, DBConstants.DBObjectsLocation);
IEnumerable<String> allDBOLocations = null;
// Get all DBObjects from DirectoryListing
try
{
//this is the fasted way to get all UUIDs of a certain vertex type
allDBOLocations = _IGraphFSSession.GetDirectoryListing(_DBObjectsLocation).Value;
}
catch (Exception e)
{
return new Exceptional<Boolean>(new Error_RebuildIndexFailed(DBConstants.UUIDIdxName, DBConstants.DEFAULTINDEX, e.Message));
}
var UUIDAttributeUUID = _DBContext.DBTypeManager.GetUUIDTypeAttribute().UUID;
var UUIDIdxIndexKey = new IndexKeyDefinition(new List<AttributeUUID>() { UUIDAttributeUUID });
foreach (var _DBObjectLocation in allDBOLocations)
{
//the "allDBOLocations" are elements of a FS-directory-listing... so there might be default directory entries
if (!_DBObjectLocation.StartsWith(DBConstants.DefaultDirectoryEntryPrefix))
{
var _DBObjectExceptional = _DBContext.DBObjectManager.LoadDBObject(new ObjectLocation(_DBObjectsLocation, _DBObjectLocation));
if (_DBObjectExceptional.Failed())
{
return new Exceptional<Boolean>(_DBObjectExceptional);
}
//rebuild everything but the UUIDidx
foreach (var idx in _UserDefinedType.GetAllAttributeIndices(_DBContext, false))
{
//foreach (var _AttributeIndex in _KeyValuePair.Values)
{
idx.Insert(_DBObjectExceptional.Value, _UserDefinedType, _DBContext);
}
}
}
}
}
return new Exceptional<bool>(true);
}
public Boolean HasAttributeIndices(IndexKeyDefinition myIndexDefinition)
{
return _AttributeIndices.ContainsKey(myIndexDefinition) || (_AttributeIndexLocations.IsNotNullOrEmpty() && _AttributeIndexLocations.ContainsKey(myIndexDefinition));
}
public override void Deserialize(ref Lib.NewFastSerializer.SerializationReader mySerializationReader)
{
FileSystemLocation = new ObjectLocation(ObjectLocation.ParseString(mySerializationReader.ReadString()));
IndexEdition = mySerializationReader.ReadString();
IndexName = mySerializationReader.ReadString();
_IsUUIDIndex = mySerializationReader.ReadBoolean();
IndexKeyDefinition = new IndexKeyDefinition();
IndexKeyDefinition.Deserialize(ref mySerializationReader);
IndexRelatedTypeUUID = new TypeUUID(ref mySerializationReader);
}
public Exceptional<Boolean> RebuildIndices(IEnumerable<GraphDBType> myUserDefinedTypes)
{
#region Remove old attribute indices
foreach (var _UserDefinedType in myUserDefinedTypes)
{
foreach (var _AttributeIndex in _UserDefinedType.GetAllAttributeIndices(includeUUIDIndices: false))
{
// Clears the index and removes it from the file system!
_AttributeIndex.ClearAndRemoveFromDisc(this);
}
}
#endregion
foreach (var _UserDefinedType in myUserDefinedTypes)
{
var _DBObjectsLocation = new ObjectLocation(_UserDefinedType.ObjectLocation, DBConstants.DBObjectsLocation);
// Get all DBObjects from DirectoryListing
using (var _DBObjectsLocationsExceptional = _IGraphFSSession.GetFilteredDirectoryListing(_DBObjectsLocation, null, null, null, new List<String>(new String[] { DBConstants.DBOBJECTSTREAM }), null, null, null, null, null, null))
{
if (_DBObjectsLocationsExceptional.IsValid())
{
var UUIDAttributeUUID = _DBContext.DBTypeManager.GetUUIDTypeAttribute().UUID;
var UUIDIdxIndexKey = new IndexKeyDefinition(new List<AttributeUUID>() { UUIDAttributeUUID });
foreach (var _DBObjectLocation in _DBObjectsLocationsExceptional.Value)
{
var _DBObjectExceptional = _DBContext.DBObjectManager.LoadDBObject(new ObjectLocation(_DBObjectsLocation, _DBObjectLocation));
if (_DBObjectExceptional.Failed())
{
return new Exceptional<Boolean>(_DBObjectExceptional);
}
//rebuild everything but the UUIDidx
foreach (var _KeyValuePair in _UserDefinedType.AttributeIndices.Where(aIDX => aIDX.Key != UUIDIdxIndexKey))
{
foreach (var _AttributeIndex in _KeyValuePair.Value.Values)
{
_AttributeIndex.Insert(_DBObjectExceptional.Value, _UserDefinedType, _DBContext);
}
}
}
}
else
return new Exceptional<bool>(new Error_IndexRebuildError(_UserDefinedType, _DBObjectsLocation));
}
}
return new Exceptional<bool>(true);
}
public List<AAttributeIndex> GetAttributeIndices(IndexKeyDefinition IndexName)
{
if (_AttributeIndices.ContainsKey(IndexName))
return new List<AAttributeIndex>(_AttributeIndices[IndexName].Values);
return null;
}
public override void Deserialize(ref SerializationReader mySerializationReader)
{
UInt32 _Capacity;
if (mySerializationReader != null)
{
try
{
_UUID = new TypeUUID(this.ObjectUUID.GetByteArray());
ParentTypeUUID = new TypeUUID();
ParentTypeUUID.Deserialize(ref mySerializationReader);
_IsUserDefined = mySerializationReader.ReadBoolean();
_IsAbstract = mySerializationReader.ReadBoolean();
_Comment = mySerializationReader.ReadString();
_Capacity = mySerializationReader.ReadUInt32();
_Attributes = new Dictionary<AttributeUUID, TypeAttribute>();
_TypeAttributeLookupTable = new Dictionary<AttributeUUID, TypeAttribute>();
for (UInt32 i = 0; i < _Capacity; i++)
{
var _AttrAtrib = new AttributeUUID();
_AttrAtrib.Deserialize(ref mySerializationReader);
var _TypeObj = new TypeAttribute();
_TypeObj.Deserialize(ref mySerializationReader);
_Attributes.Add(_AttrAtrib, _TypeObj);
_TypeAttributeLookupTable.Add(_AttrAtrib, _TypeObj);
}
_Capacity = mySerializationReader.ReadUInt32();
_TypeSettings = new Dictionary<String, ADBSettingsBase>();
for (var i = 0; i < _Capacity; i++)
{
ADBSettingsBase _ADBSettingsBase = (ADBSettingsBase) mySerializationReader.ReadObject();
if(_ADBSettingsBase != null)
_TypeSettings.Add(_ADBSettingsBase.Name, _ADBSettingsBase);
}
_Capacity = mySerializationReader.ReadUInt32();
_UniqueAttributes = new List<AttributeUUID>();
AttributeUUID AttribID = null;
for (UInt32 i = 0; i < _Capacity; i++)
{
AttribID = new AttributeUUID(ref mySerializationReader);
_UniqueAttributes.Add(AttribID);
}
_Capacity = mySerializationReader.ReadUInt32();
_MandatoryAttributes = new HashSet<AttributeUUID>();
for (UInt32 i = 0; i < _Capacity; i++)
{
AttribID = new AttributeUUID(ref mySerializationReader);
_MandatoryAttributes.Add(AttribID);
}
#region Indices
_AttributeIndices = new Dictionary<IndexKeyDefinition, Dictionary<String, AAttributeIndex>>();
_AttributeIndicesNameLookup = new Dictionary<String, IndexKeyDefinition>();
_AttributeIndexLocations = new Dictionary<IndexKeyDefinition, Dictionary<string, Tuple<string, ObjectLocation>>>();
var idxCount = mySerializationReader.ReadUInt32();
for (var i = 0; i < idxCount; i++)
{
var idxKey = new IndexKeyDefinition();
idxKey.Deserialize(ref mySerializationReader);
//_AttributeIndices.Add(idxKey, new Dictionary<String, AttributeIndex>());
var idxVersionCount = mySerializationReader.ReadUInt32();
_AttributeIndexLocations.Add(idxKey, new Dictionary<string, Tuple<string, ObjectLocation>>());
for (var j = 0; j < idxVersionCount; j++)
{
var key = mySerializationReader.ReadString();
var idxLocation = mySerializationReader.ReadString();
var indexType = mySerializationReader.ReadString();
_AttributeIndexLocations[idxKey][key] = new Tuple<string,ObjectLocation>(indexType, new ObjectLocation(idxLocation));
//idx.IndexKeyDefinition = idxKey;
//AddAttributeIndex(idx as AAttributeIndex);
}
}
#endregion
}
catch (Exception e)
{
throw new SerializationException("The GraphDBType could not be deserialized!\n\n" + e);
}
}
}
/// <summary>
/// Create a new Index
/// </summary>
/// <param name="myIndexName"></param>
/// <param name="myAttributeDefinitions"></param>
/// <param name="myIndexEdition"></param>
/// <param name="myIndexType">The index type name</param>
/// <param name="myFileSystemLocation"></param>
/// <returns></returns>
public Exceptional<AAttributeIndex> CreateAttributeIndex(DBContext myDBContext, String myIndexName, IndexKeyDefinition myIndexKeyDefinition, String myIndexEdition, String myIndexType = null)
{
if (!String.IsNullOrEmpty(myIndexType))
{
#region Verify IndexType
if (!myDBContext.DBPluginManager.HasIndex(myIndexType))
{
return new Exceptional<AAttributeIndex>(new Error_IndexTypeDoesNotExist(myIndexType));
}
#endregion
}
else
{
//if (myDBContext.IGraphFSSession is IPathBasedFS)
//{
// myIndexType = "BPlusTree";
//}
//else
//{
// myIndexType = HashTableIndex.INDEX_TYPE;
//}
myIndexType = myDBContext.GraphAppSettings.Get<AttributeIndexTypeSetting>();
}
if (String.IsNullOrEmpty(myIndexEdition))
{
myIndexEdition = DBConstants.DEFAULTINDEX;
}
var attributeIdxShards = UInt16.Parse(myDBContext.GraphAppSettings.Get<AttributeIdxShardsSetting>());
var _NewAttributeIndex = myDBContext.DBPluginManager.GetIndex(myIndexType); //new HashTableIndex(myIndexName, myIndexEdition, myAttributeUUIDs, this);
if (_NewAttributeIndex.Failed())
{
return _NewAttributeIndex;
}
var initializeResult = _NewAttributeIndex.Value.Initialize(myDBContext, myIndexName, myIndexKeyDefinition, this, indexEdition: myIndexEdition);
if (initializeResult.Failed())
{
return new Exceptional<AAttributeIndex>(initializeResult);
}
var CreateExcept = AddAttributeIndex(_NewAttributeIndex.Value, myDBContext);
if (CreateExcept.Failed())
{
return new Exceptional<AAttributeIndex>(CreateExcept);
}
return _NewAttributeIndex;
}
/// <summary>
/// Returns the index of the given attribute
/// </summary>
/// <param name="myAttributeUUID">The name of the attribute we want an index for.</param>
/// <param name="myIndexEdition">THe name of the index edition. May be null</param>
/// <returns>The index for the given myAttributes if one exist. Else, null.</returns>
public Exceptional<AAttributeIndex> GetAttributeIndex(AttributeUUID myAttributeUUID, String myIndexEdition)
{
IndexKeyDefinition idxKey = new IndexKeyDefinition(new List<AttributeUUID>() { myAttributeUUID });
lock (_AttributeIndices)
{
if (_AttributeIndices.ContainsKey(idxKey))
{
if (myIndexEdition == null)
{
if (_AttributeIndices[idxKey].ContainsKey(DBConstants.DEFAULTINDEX))
return new Exceptional<AAttributeIndex>(_AttributeIndices[idxKey][DBConstants.DEFAULTINDEX]);
else
return new Exceptional<AAttributeIndex>(_AttributeIndices[idxKey].First().Value);
}
else if (_AttributeIndices[idxKey].ContainsKey(myIndexEdition))
{
return new Exceptional<AAttributeIndex>(_AttributeIndices[idxKey][myIndexEdition]);
}
}
}
return new Exceptional<AAttributeIndex>(new Error_IndexAttributeDoesNotExist(GetTypeAttributeByUUID(myAttributeUUID).Name));
}
/// <summary>
/// Returns the default edition index of the given attribute. If there is more than one (or empty) Edition then return the first.
/// At some time, we could change this to take statistical information to get the best index
/// </summary>
/// <param name="myAttributeName">The name of the attribute we want an index for.</param>
/// <returns>An exceptional that contains the index for the given myAttributes if one exist. Else, an error.</returns>
public Exceptional<AAttributeIndex> GetDefaultAttributeIndex(DBContext myDBContext, AttributeUUID myAttributeUUID)
{
IndexKeyDefinition idxKey = new IndexKeyDefinition(new List<AttributeUUID>() { myAttributeUUID });
return GetAttributeIndex(myDBContext, idxKey, DBConstants.DEFAULTINDEX);
}
/// <summary>
/// Instantiates a new IndexKey on the base of another one. Additionally a AADBBaseObject is added.
/// </summary>
/// <param name="myStartingIndexKey">The base of the new IndexKey</param>
/// <param name="myAttributeUUID">AttributeUUID corresponding to the ADBBaseObject</param>
/// <param name="myIndexKeyPayload">The ADBBaseObject that is going to be added</param>
/// <param name="myIndexDefinition">The corresponding IndexKeyDefinition</param>
public IndexKey(IndexKey myStartingIndexKey, AttributeUUID myAttributeUUID, ADBBaseObject myIndexKeyPayload, IndexKeyDefinition myIndexDefinition)
{
_hashCode = myStartingIndexKey.GetHashCode();
_indexKeyValues.AddRange(myStartingIndexKey.IndexKeyValues);
if (!myIndexDefinition.IndexKeyAttributeUUIDs.Contains(myAttributeUUID))
{
throw new GraphDBException(new Error_IndexKeyCreationError(myAttributeUUID, myIndexKeyPayload, myIndexDefinition));
}
else
{
AddAAKey(myAttributeUUID, myIndexKeyPayload);
}
}
public IEnumerable<AAttributeIndex> GetAttributeIndices(IndexKeyDefinition IndexName)
{
if (_AttributeIndices.ContainsKey(IndexName))
{
foreach (var aIdx in _AttributeIndices[IndexName])
{
yield return aIdx.Value;
}
}
yield break;
}
public Exceptional<Boolean> RebuildIndices(IEnumerable<GraphDBType> myUserDefinedTypes)
{
#region Remove old attribute indices
foreach (var _UserDefinedType in myUserDefinedTypes)
{
foreach (var _AttributeIndex in _UserDefinedType.GetAllAttributeIndices(includeUUIDIndices: false))
{
// Clears the index and removes it from the file system!
_AttributeIndex.ClearAndRemoveFromDisc(this);
}
}
#endregion
foreach (var _UserDefinedType in myUserDefinedTypes)
{
var _DBObjectsLocation = new ObjectLocation(_UserDefinedType.ObjectLocation, DBConstants.DBObjectsLocation);
IEnumerable<String> allDBOLocations = null;
// Get all DBObjects from DirectoryListing
try
{
allDBOLocations = _DBContext.DBObjectManager.GetAllStreamsRecursive(_DBObjectsLocation, DBConstants.DBOBJECTSTREAM);
}
catch (Exception e)
{
return new Exceptional<Boolean>(new Error_RebuildIndexFailed(DBConstants.UUIDIdxName, DBConstants.DEFAULTINDEX, e.Message));
}
var UUIDAttributeUUID = _DBContext.DBTypeManager.GetUUIDTypeAttribute().UUID;
var UUIDIdxIndexKey = new IndexKeyDefinition(new List<AttributeUUID>() { UUIDAttributeUUID });
foreach (var _DBObjectLocation in allDBOLocations)
{
var _DBObjectExceptional = _DBContext.DBObjectManager.LoadDBObject(new ObjectLocation(_DBObjectsLocation, _DBContext.DBObjectManager.GetDBObjectStreamShard(_UserDefinedType, new ObjectUUID(_DBObjectLocation)), _DBObjectLocation));
if (_DBObjectExceptional.Failed())
{
return new Exceptional<Boolean>(_DBObjectExceptional);
}
//rebuild everything but the UUIDidx
foreach (var _KeyValuePair in _UserDefinedType.AttributeIndices.Where(aIDX => aIDX.Key != UUIDIdxIndexKey))
{
foreach (var _AttributeIndex in _KeyValuePair.Value.Values)
{
_AttributeIndex.Insert(_DBObjectExceptional.Value, _UserDefinedType, _DBContext);
}
}
}
}
return new Exceptional<bool>(true);
}
public Boolean HasAttributeIndices(IndexKeyDefinition myIndexDefinition)
{
return _AttributeIndices.ContainsKey(myIndexDefinition);
}
public override Exceptional Initialize(DBContext myDBContext, string indexName, IndexKeyDefinition idxKey, GraphDBType correspondingType, string indexEdition = DBConstants.DEFAULTINDEX)
{
IndexName = indexName;
IndexEdition = indexEdition;
IndexKeyDefinition = idxKey;
IndexRelatedTypeUUID = correspondingType.UUID;
AttributeIdxShards = Convert.ToUInt16(myDBContext.GraphAppSettings.Get<AttributeIdxShardsSetting>());
_keyCount = 0;
_valueCount = 0;
if (indexEdition == null)
{
IndexEdition = DBConstants.DEFAULTINDEX;
}
else
{
IndexEdition = indexEdition;
}
_IsUUIDIndex = idxKey.IndexKeyAttributeUUIDs.Count == 1 && idxKey.IndexKeyAttributeUUIDs[0].Equals(myDBContext.DBTypeManager.GetUUIDTypeAttribute().UUID);
#region Workaround for current IndexOperation of InOperator - just follow the IsListOfBaseObjectsIndex property
// better approach, use a special index key for a set of base objects
if (idxKey.IndexKeyAttributeUUIDs.Any(a =>
{
var typeAttr = correspondingType.GetTypeAttributeByUUID(a);
if (typeAttr != null && (typeAttr.EdgeType is IBaseEdge))
{
return true;
}
else
{
return false;
}
}))
{
IsListOfBaseObjectsIndex = true;
}
else
{
IsListOfBaseObjectsIndex = false;
}
#endregion
FileSystemLocation = (correspondingType.ObjectLocation + "Indices") + (IndexName + "#" + IndexEdition);
return Exceptional.OK;
}
/// <summary>
/// Returns the attribute index with the specified key and edition.
/// </summary>
/// <param name="idxKey">The index key.</param>
/// <param name="edition">The index edition.</param>
/// <returns>The index or null if no index was found.</returns>
private AAttributeIndex GetAttributeIndex(IndexKeyDefinition idxKey, string edition)
{
if (_AttributeIndices.ContainsKey(idxKey) && _AttributeIndices[idxKey].ContainsKey(DBConstants.UNIQUEATTRIBUTESINDEX))
{
return _AttributeIndices[idxKey][DBConstants.UNIQUEATTRIBUTESINDEX];
}
return null;
}
public Error_IndexKeyCreationError(AttributeUUID myAttributeUUID, ADBBaseObject myIndexKeyPayload, IndexKeyDefinition myIndexDefinition)
{
AttributeUUID = myAttributeUUID;
IndexKeyPayload = myIndexKeyPayload;
IndexDefinition = myIndexDefinition;
}
/// <summary>
/// add an unique attribute to type
/// </summary>
/// <param name="myAttribID"></param>
public Exceptional<Boolean> AddUniqueAttributes(List<AttributeUUID> myAttribIDs, DBContext myDBContext)
{
if (!myAttribIDs.IsNullOrEmpty())
{
#region data
AAttributeIndex AttribIndex = null;
List<GraphDBType> SubTypes = myDBContext.DBTypeManager.GetAllSubtypes(this, false);
IndexKeyDefinition idxKey = new IndexKeyDefinition(myAttribIDs);
#endregion
AttribIndex = GetAttributeIndex(idxKey, DBConstants.UNIQUEATTRIBUTESINDEX);
if (!SubTypes.IsNullOrEmpty())
{
string idxName = myDBContext.DBIndexManager.GetUniqueIndexName(myAttribIDs, this);
foreach (var aType in SubTypes)
{
foreach (var AttrID in myAttribIDs)
{
aType._UniqueAttributes.Add(AttrID);
}
if (AttribIndex != null)
{
var createIdxExcept = aType.CreateUniqueAttributeIndex(myDBContext, idxName, myAttribIDs, DBConstants.UNIQUEATTRIBUTESINDEX);
if (createIdxExcept.Failed())
return new Exceptional<Boolean>(createIdxExcept);
}
}
}
_UniqueAttributes.AddRange(myAttribIDs);
}
return new Exceptional<Boolean>(true);
}
