An implementation of IStore that persists data in the application memory. More...

Inheritance diagram for Deveel.Data.Store.InMemoryStore:

Classes
class	InMemoryArea

class	InMemoryBlock

Public Member Functions
void	Dispose ()

IArea	CreateArea (long size)
	Allocates a block of memory in the store of the specified size and returns an IArea object that can be used to initialize the contents of the area. More...

void	DeleteArea (long id)
	Deletes an area that was previously allocated by the CreateArea method by the area id. More...

IArea	GetArea (long id, bool readOnly)
	Returns an object that allows for the contents of an area (represented by the id parameter) to be Read. More...

void	Lock ()
	This method is called before the start of a sequence of Write commands between consistant states of some data structure represented by the store. More...

void	Unlock ()
	This method is called after the end of a sequence of Write commands between consistant states of some data structure represented by the store. More...

void	CheckPoint ()

IEnumerable< long >	GetAllAreas ()
	Returns a complete list of pointers to all areas in the Store as long objects sorted from lowest pointer to highest. More...

Package Functions
	InMemoryStore (string name, int hashSize)

Properties
string	Name `[get, private set]`
	Gets the unique name of the store within the application. More...

InMemoryBlock	FixedAreaBlock `[get]`

bool	ClosedClean `[get]`

Properties inherited from Deveel.Data.Store.IStore
bool	ClosedClean `[get]`
	Indicates if the store was closed cleanly last time was accessed. More...

Private Member Functions
	~InMemoryStore ()

void	Dispose (bool disposing)

InMemoryBlock	GetBlock (long pointer)

InMemoryBlock	GetAreaBlock (long pointer)

Private Attributes
InMemoryBlock	fixedAreaBlock

InMemoryBlock[]	areaMap

long	uniqueIdKey

Detailed Description

An implementation of IStore that persists data in the application memory.

Definition at line 27 of file InMemoryStore.cs.

Constructor & Destructor Documentation

Deveel.Data.Store.InMemoryStore.InMemoryStore	(	string	name,
		int	hashSize
	)

inlinepackage

Definition at line 32 of file InMemoryStore.cs.

                                                           {
             Name = name;
             areaMap = new InMemoryBlock[hashSize];
             uniqueIdKey = 0;
         }

Deveel.Data.Store.InMemoryStore.~InMemoryStore ( )

inlineprivate

Definition at line 38 of file InMemoryStore.cs.

                          {
             Dispose(false);
         }

Member Function Documentation

void Deveel.Data.Store.InMemoryStore.CheckPoint ( )

inline

Definition at line 171 of file InMemoryStore.cs.

171 {

172 }

IArea Deveel.Data.Store.InMemoryStore.CreateArea ( long size )

inline

Allocates a block of memory in the store of the specified size and returns an IArea object that can be used to initialize the contents of the area.

Implements Deveel.Data.Store.IStore.

Definition at line 105 of file InMemoryStore.cs.

                                            {
             if (size > Int32.MaxValue)
                 throw new IOException("'size' is too large.");
 
             lock (this) {
                 // Generate a unique id for this area.
                 long id = uniqueIdKey;
                 ++uniqueIdKey;
 
                 // Create the element.
                 var element = new InMemoryBlock(id, (int)size);
 
                 // The position in the hash map
                 int hashPos = (int)(id % areaMap.Length);
 
                 // Add to the chain
                 element.Next = areaMap[hashPos];
                 areaMap[hashPos] = element;
 
                 return element.GetArea(false);
             }
         }

void Deveel.Data.Store.InMemoryStore.DeleteArea ( long id )

inline

Deletes an area that was previously allocated by the CreateArea method by the area id.

Implements Deveel.Data.Store.IStore.

Definition at line 129 of file InMemoryStore.cs.

                                         {
             lock (this) {
                 // Find the pointer in the hash
                 var hashPos = (int)(id % areaMap.Length);
                 InMemoryBlock prev = null;
                 InMemoryBlock block = areaMap[hashPos];
 
                 // Search for this pointer
                 while (block != null && block.Id != id) {
                     prev = block;
                     block = block.Next;
                 }
 
                 // If not found
                 if (block == null)
                     throw new IOException("Area ID " + id + " is invalid.");
 
                 // Remove
                 if (prev == null) {
                     areaMap[hashPos] = block.Next;
                 } else {
                     prev.Next = block.Next;
                 }
 
                 // Garbage collector should do the rest...
             }
         }

void Deveel.Data.Store.InMemoryStore.Dispose ( bool disposing )

inlineprivate

Definition at line 58 of file InMemoryStore.cs.

                                              {
             if (disposing) {
                 fixedAreaBlock = null;
                 areaMap = null;
             }
         }

void Deveel.Data.Store.InMemoryStore.Dispose ( )

inline

Definition at line 65 of file InMemoryStore.cs.

                               {
             Dispose(true);
             GC.SuppressFinalize(this);
         }

IEnumerable<long> Deveel.Data.Store.InMemoryStore.GetAllAreas ( )

inline

Returns a complete list of pointers to all areas in the Store as long objects sorted from lowest pointer to highest.

Implements Deveel.Data.Store.IStore.

Definition at line 180 of file InMemoryStore.cs.

                                                {
             throw new NotImplementedException();
         }

IArea Deveel.Data.Store.InMemoryStore.GetArea	(	long	id,
		bool	readOnly
	)

inline

Returns an object that allows for the contents of an area (represented by the id parameter) to be Read.

Implements Deveel.Data.Store.IStore.

Definition at line 158 of file InMemoryStore.cs.

                                                      {
             return GetBlock(id).GetArea(readOnly);
         }

InMemoryBlock Deveel.Data.Store.InMemoryStore.GetAreaBlock ( long pointer )

inlineprivate

Definition at line 77 of file InMemoryStore.cs.

                                                          {
             lock (this) {
                 // Find the pointer in the hash
                 var hashPos = (int)(pointer % areaMap.Length);
                 InMemoryBlock prev = null;
                 var block = areaMap[hashPos];
 
                 // Search for this pointer
                 while (block != null && block.Id != pointer) {
                     prev = block;
                     block = block.Next;
                 }
 
                 if (block == null)
                     throw new IOException("Pointer " + pointer + " is invalid.");
 
                 // Move the element to the start of the list.
                 if (prev != null) {
                     prev.Next = block.Next;
                     block.Next = areaMap[hashPos];
                     areaMap[hashPos] = block;
                 }
 
                 return block;
             }
         }

InMemoryBlock Deveel.Data.Store.InMemoryStore.GetBlock ( long pointer )

inlineprivate

Definition at line 70 of file InMemoryStore.cs.

                                                      {
             if (pointer == -1)
                 return FixedAreaBlock;
 
             return GetAreaBlock(pointer);
         }

void Deveel.Data.Store.InMemoryStore.Lock ( )

inline

This method is called before the start of a sequence of Write commands between consistant states of some data structure represented by the store.

Implements Deveel.Data.Store.IStore.

Definition at line 163 of file InMemoryStore.cs.

163 {

164 }

void Deveel.Data.Store.InMemoryStore.Unlock ( )

inline

This method is called after the end of a sequence of Write commands between consistant states of some data structure represented by the store.

Implements Deveel.Data.Store.IStore.

Definition at line 167 of file InMemoryStore.cs.

167 {

168 }

Member Data Documentation

InMemoryBlock [] Deveel.Data.Store.InMemoryStore.areaMap

private

Definition at line 29 of file InMemoryStore.cs.

InMemoryBlock Deveel.Data.Store.InMemoryStore.fixedAreaBlock

private

Definition at line 28 of file InMemoryStore.cs.

long Deveel.Data.Store.InMemoryStore.uniqueIdKey

private

Definition at line 30 of file InMemoryStore.cs.

Property Documentation

bool Deveel.Data.Store.InMemoryStore.ClosedClean

get

Definition at line 175 of file InMemoryStore.cs.

InMemoryBlock Deveel.Data.Store.InMemoryStore.FixedAreaBlock

getprivate

Definition at line 47 of file InMemoryStore.cs.

string Deveel.Data.Store.InMemoryStore.Name

getprivate set

Gets the unique name of the store within the application.

Definition at line 45 of file InMemoryStore.cs.

The documentation for this class was generated from the following file:

/var/calculate/remote/distfiles/egit-src/deveeldb.git/src/deveeldb/Deveel.Data.Store/InMemoryStore.cs

Classes

Public Member Functions

Package Functions

Properties

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation

Property Documentation