public SingleFileStore CreateStore(string name)
{
lock (checkPointLock) {
SingleFileStore store;
if (TryFindStore(name, out store))
{
throw new IOException(string.Format("The store '{0}' already exists in this database.", name));
}
if (nameIdMap == null)
{
nameIdMap = new Dictionary <string, int>();
}
if (stores == null)
{
stores = new Dictionary <int, SingleFileStore>();
}
var id = ++storeId;
store = new SingleFileStore(this, name, id);
store.Open();
stores[id] = store;
nameIdMap[name] = id;
return(store);
}
}
public bool CloseStore(SingleFileStore store)
{
try {
SingleFileStore fileStore;
if (!TryFindStore(store.Name, out fileStore))
{
throw new IOException("The store was not found in this database.");
}
fileStore.Close();
return(true);
} catch (IOException) {
throw;
} catch (Exception ex) {
throw new IOException("Unable to close the store.", ex);
}
}
private bool TryFindStore(string storeName, out SingleFileStore store)
{
int id;
if (nameIdMap == null || !nameIdMap.TryGetValue(storeName, out id))
{
store = null;
return(false);
}
if (stores == null || !stores.TryGetValue(id, out store))
{
store = null;
return(false);
}
return(true);
}
private long WriteStoreInfo(BinaryWriter writer, long offset, SingleFileStore store)
{
var nameLength = store.Name.Length;
var name = store.Name;
var id = store.Id;
var size = store.DataLength;
writer.Write(nameLength);
writer.Write(name.ToCharArray());
writer.Write(id);
writer.Write(offset);
writer.Write(size);
storeInfo[store.Id] = new StoreInfo(name, id, offset, size);
offset += store.DataLength;
return(offset);
}
public bool DeleteStore(SingleFileStore store)
{
try {
if (stores == null || !stores.ContainsKey(store.Id))
{
return(false);
}
return(stores.Remove(store.Id));
} catch (IOException) {
throw;
} catch (Exception ex) {
throw new IOException("Unable to delete the store.", ex);
} finally {
if (nameIdMap != null)
{
nameIdMap.Remove(store.Name);
}
}
}
private long WriteStoreInfo(BinaryWriter writer, long offset, SingleFileStore store)
{
var nameLength = store.Name.Length;
var name = store.Name;
var id = store.Id;
var size = store.DataLength;
writer.Write(nameLength);
writer.Write(name.ToCharArray());
writer.Write(id);
writer.Write(offset);
writer.Write(size);
storeInfo[store.Id] = new StoreInfo(name, id, offset, size);
offset += store.DataLength;
return offset;
}
private bool TryFindStore(string storeName, out SingleFileStore store)
{
int id;
if (nameIdMap == null || !nameIdMap.TryGetValue(storeName, out id)) {
store = null;
return false;
}
if (stores == null || !stores.TryGetValue(id, out store)) {
store = null;
return false;
}
return true;
}
public bool DeleteStore(SingleFileStore store)
{
try {
if (stores == null || !stores.ContainsKey(store.Id))
return false;
return stores.Remove(store.Id);
} catch (IOException) {
throw;
} catch (Exception ex) {
throw new IOException("Unable to delete the store.", ex);
} finally {
if (nameIdMap != null)
nameIdMap.Remove(store.Name);
}
}
public SingleFileStore CreateStore(string name)
{
lock (checkPointLock) {
SingleFileStore store;
if (TryFindStore(name, out store))
throw new IOException(string.Format("The store '{0}' already exists in this database.", name));
if (nameIdMap == null)
nameIdMap = new Dictionary<string, int>();
if (stores == null)
stores = new Dictionary<int, SingleFileStore>();
var id = ++storeId;
store = new SingleFileStore(this, name, id);
store.Open();
stores[id] = store;
nameIdMap[name] = id;
return store;
}
}
public bool CloseStore(SingleFileStore store)
{
try {
SingleFileStore fileStore;
if (!TryFindStore(store.Name, out fileStore))
throw new IOException("The store was not found in this database.");
fileStore.Close();
return true;
} catch (IOException) {
throw;
} catch (Exception ex) {
throw new IOException("Unable to close the store.", ex);
}
}
