/// <summary>
/// Returns null if:
/// 1. Could not take a lock on the item
/// 2. Item was not available locally
///
/// When you are done editing, call CommitAsync() on the RecordItemEditOperation
/// To abort, call RecordItemEditOperation::Cancel()
///
/// </summary>
public IAsyncOperation <RecordItemEditOperation> OpenForEditAsync(ItemKey key)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
return(AsyncInfo.Run <RecordItemEditOperation>(async cancelToken =>
{
RecordItemLock rLock = this.AcquireItemLock(key);
if (rLock == null)
{
return null;
}
RecordItemEditOperation editOp = null;
try
{
editOp = await this.OpenForEditAsync(key, rLock);
return editOp;
}
finally
{
if (editOp == null)
{
rLock.Release();
}
}
}));
}
void ReleaseLock()
{
if (m_rLock != null)
{
m_rLock.Release();
m_rLock = null;
}
}
/// <summary>
/// Updates an existing item. To update, you must first acquire a lock on it, and prove that you own the lock.
/// Note: if you use higher level objects like SynchronizedStore, you won't have to acquire locks yourself.
/// </summary>
public IAsyncAction PutAsync(IItemDataTyped item, RecordItemLock itemLock)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
return(this.PutItemAsync(item.Item, itemLock));
}
internal IAsyncAction PutAsync(IItemDataTyped item, RecordItemLock itemLock)
{
this.ValidateItem(item);
return(AsyncInfo.Run(async cancelToken => {
await this.Data.PutAsync(item, itemLock);
await this.UpdateKeyAsync(item.Item);
}));
}
internal IAsyncAction RemoveAsync(ItemKey key, RecordItemLock itemLock)
{
key.ValidateRequired("key");
return(AsyncInfo.Run(async cancelToken =>
{
await this.Data.RemoveItemAsync(m_typeID, key, itemLock);
await this.RemoveKeyAsync(key);
}));
}
void Dispose(bool fromDispose)
{
if (fromDispose)
{
this.ReleaseLock();
GC.SuppressFinalize(this);
}
m_rLock = null;
}
internal async Task <RecordItemEditOperation> OpenForEditAsync(ItemKey key, RecordItemLock itemLock)
{
IItemDataTyped data = await this.EnsureItemAvailableAndGetByKeyAsync(key);
if (data == null)
{
return(null);
}
return(new RecordItemEditOperation(this, data, itemLock));
}
/// <summary>
/// Remove an item. To remove, you must first acquire a lock on the item, and prove that you own the lock.
/// If you use the higher level SychronizedType object, you won't have to acquire the lock yourself
/// </summary>
public IAsyncAction RemoveItemAsync(string typeID, ItemKey itemKey, RecordItemLock itemLock)
{
itemKey.ValidateRequired("key");
if (itemLock == null)
{
throw new ArgumentNullException("itemLock");
}
m_itemLocks.ValidateLock(itemKey.ID, itemLock.LockID);
return(AsyncInfo.Run(async cancelToken => {
await m_localStore.RemoveItemAsync(itemKey);
await m_changeManager.TrackRemoveAsync(typeID, itemKey);
}));
}
public IAsyncAction NewItemAsync(RecordItem item)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
SynchronizedStore.PrepareForNew(item);
return(AsyncInfo.Run(async cancelToken =>
{
RecordItemLock rlock = m_itemLocks.AcquireItemLock(item.ID);
if (rlock != null)
{
using (rlock)
{
await this.PutItemAsync(item, rlock);
}
}
}));
}
public IAsyncAction PutItemAsync(RecordItem item, RecordItemLock itemLock)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
if (itemLock == null)
{
throw new ArgumentNullException("itemLock");
}
m_itemLocks.ValidateLock(item.ID, itemLock.LockID);
item.UpdateEffectiveDate();
return(AsyncInfo.Run(async cancelToken => {
await m_localStore.PutItemAsync(item);
await m_changeManager.TrackPutAsync(item);
}));
}
/// <summary>
/// Before removing the item, will try to take a lock on the item in question.
/// If it can't, it will return FALSE
/// </summary>
public IAsyncOperation <bool> RemoveAsync(ItemKey key)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
return(AsyncInfo.Run(async cancelToken =>
{
RecordItemLock rLock = this.AcquireItemLock(key);
if (rLock == null)
{
return false;
}
using (rLock)
{
await this.RemoveAsync(key, rLock);
}
this.StartCommitChanges();
return true;
}));
}
internal RecordItemLock AcquireItemLock(string itemID)
{
long lockID = 0;
try
{
lockID = this.AcquireLock(itemID);
if (!IsValidLockID(lockID))
{
return(null);
}
RecordItemLock itemLock = new RecordItemLock(this, itemID, lockID);
lockID = 0;
return(itemLock);
}
finally
{
if (IsValidLockID(lockID))
{
this.ReleaseLock(itemID, lockID);
}
}
}
/// <summary>
/// Add a new item. The item is saved in the local store immediately, and a pending commit to the remote store is put in
/// the synchronized store's change queue
/// </summary>
public IAsyncAction AddNewAsync(IItemDataTyped item)
{
this.ValidateItem(item);
RecordItem recordItem = item.Item;
SynchronizedStore.PrepareForNew(recordItem);
return(AsyncInfo.Run(async cancelToken => {
RecordItemLock rlock = this.AcquireItemLock(recordItem.Key);
if (rlock == null)
{
return;
}
using (rlock)
{
await this.Data.PutItemAsync(recordItem, rlock);
await this.AddKeyAsync(recordItem);
}
this.StartCommitChanges();
}));
}
internal RecordItemEditOperation(SynchronizedType sType, IItemDataTyped data, RecordItemLock rLock)
{
m_sType = sType;
m_rLock = rLock;
m_data = data.Item.DeepClone().TypedData;
}
void ReleaseLock()
{
if (m_rLock != null)
{
m_rLock.Release();
m_rLock = null;
}
}
void Dispose(bool fromDispose)
{
if (fromDispose)
{
this.ReleaseLock();
GC.SuppressFinalize(this);
}
m_rLock = null;
}
internal RecordItemEditOperation(SynchronizedType sType, IItemDataTyped data, RecordItemLock rLock)
{
m_sType = sType;
m_rLock = rLock;
m_data = data.Item.DeepClone().TypedData;
}
/// <summary>
/// Remove an item. To remove, you must first acquire a lock on the item, and prove that you own the lock.
/// If you use the higher level SychronizedType object, you won't have to acquire the lock yourself
/// </summary>
public IAsyncAction RemoveItemAsync(string typeID, ItemKey itemKey, RecordItemLock itemLock)
{
itemKey.ValidateRequired("key");
if (itemLock == null)
{
throw new ArgumentNullException("itemLock");
}
m_itemLocks.ValidateLock(itemKey.ID, itemLock.LockID);
return AsyncInfo.Run(async cancelToken => {
await m_localStore.RemoveItemAsync(itemKey);
await m_changeManager.TrackRemoveAsync(typeID, itemKey);
});
}
internal IAsyncAction PutAsync(IItemDataTyped item, RecordItemLock itemLock)
{
this.ValidateItem(item);
return AsyncInfo.Run(async cancelToken => {
await this.Data.PutAsync(item, itemLock);
await this.UpdateKeyAsync(item.Item);
});
}
internal RecordItemLock AcquireItemLock(string itemID)
{
long lockID = 0;
try
{
lockID = this.AcquireLock(itemID);
if (!IsValidLockID(lockID))
{
return null;
}
RecordItemLock itemLock = new RecordItemLock(this, itemID, lockID);
lockID = 0;
return itemLock;
}
finally
{
if (IsValidLockID(lockID))
{
this.ReleaseLock(itemID, lockID);
}
}
}
internal async Task<RecordItemEditOperation> OpenForEditAsync(ItemKey key, RecordItemLock itemLock)
{
IItemDataTyped data = await this.EnsureItemAvailableAndGetByKeyAsync(key);
if (data == null)
{
return null;
}
return new RecordItemEditOperation(this, data, itemLock);
}
/// <summary>
/// Updates an existing item. To update, you must first acquire a lock on it, and prove that you own the lock.
/// Note: if you use higher level objects like SynchronizedStore, you won't have to acquire locks yourself.
/// </summary>
public IAsyncAction PutAsync(IItemDataTyped item, RecordItemLock itemLock)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
return this.PutItemAsync(item.Item, itemLock);
}
internal IAsyncAction RemoveAsync(ItemKey key, RecordItemLock itemLock)
{
key.ValidateRequired("key");
return AsyncInfo.Run(async cancelToken =>
{
await this.Data.RemoveItemAsync(m_typeID, key, itemLock);
await this.RemoveKeyAsync(key);
});
}
public IAsyncAction PutItemAsync(RecordItem item, RecordItemLock itemLock)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
if (itemLock == null)
{
throw new ArgumentNullException("itemLock");
}
m_itemLocks.ValidateLock(item.ID, itemLock.LockID);
item.UpdateEffectiveDate();
return AsyncInfo.Run(async cancelToken => {
await m_localStore.PutItemAsync(item);
await m_changeManager.TrackPutAsync(item);
});
}
