/// <summary>
/// Update the content of the store with the content of <paramref name="update"/>.
/// Any value present in <paramref name="update"/> overwrite the existing value in the store
/// if present.
/// Similarly, any deleted value in <paramref name="update"/> trigger the deletion of
/// the value with the corresponding category and key in the store if present.
/// <remarks>As part of this operation, the content of <paramref name="update"/> is cleared.</remarks>
/// </summary>
/// <param name="update">The store containing the updated values</param>
public void Update(InMemoryStateStore update)
{
if (update == null)
{
throw new ArgumentNullException(nameof(update));
}
foreach (var category in update._removedItems.Keys)
{
if (update._removedItems.TryGetValue(category, out var items))
{
while (items.TryTake(out var key))
{
RemoveItem(category, key);
}
}
}
foreach (var category in update._internalStore.Keys)
{
if (update._internalStore.TryGetValue(category, out var items))
{
foreach (var key in items.Keys)
{
if (items.TryGetValue(key, out var value))
{
AddOrUpdateItem(category, key, value);
}
}
}
}
update.Clear();
}
private static InMemoryStateStore Load(XDocument doc)
{
var store = doc.Element("Store");
var id = store.Attribute("Id").Value;
var res = new InMemoryStateStore(id);
var categories = store.Elements("Category");
foreach (var category in categories)
{
var categoryName = category.Attribute("Name").Value;
var entries = category.Elements("Entry");
foreach (var entry in entries)
{
var keyName = entry.Attribute("Name").Value;
var base64 = entry.Nodes().OfType <XCData>().Single().Value;
var value = Convert.FromBase64String(base64);
res.AddOrUpdateItem(categoryName, keyName, value);
}
}
return(res);
}
/// <summary>
/// Create a new instance of <see cref="InMemoryStateWriter"/>.
/// </summary>
/// <param name="stateStore">The store where the state is persisted.</param>
/// <param name="checkpointKind">The checkpoint kind.</param>
/// <param name="onCommit">The action to be called when committing.</param>
/// <param name="onRollback">The action to be called when rolling back.</param>
public InMemoryStateWriter(
InMemoryStateStore stateStore,
CheckpointKind checkpointKind,
Action onCommit = null,
Action onRollback = null)
{
_onRollback = onRollback;
_onCommit = onCommit;
_stateStore = stateStore ?? throw new ArgumentNullException(nameof(stateStore));
CheckpointKind = checkpointKind;
}
/// <summary>
/// Create a new instance of <see cref="InMemoryStateReader"/>.
/// </summary>
/// <param name="store">The store containing the state.</param>
public InMemoryStateReader(InMemoryStateStore store)
{
_store = store ?? throw new ArgumentNullException(nameof(store));
}