public async Task BasicTest()
{
IDbStore columnFamilyDbStore = this.rocksDbStoreProvider.GetColumnStoreFamily("test");
string key = "key1";
string value = "value1";
byte[] keyBytes = key.ToBytes();
byte[] valueBytes = value.ToBytes();
await columnFamilyDbStore.Put(keyBytes, valueBytes);
Option <byte[]> returnedValueBytesOption = await columnFamilyDbStore.Get(keyBytes);
Assert.True(returnedValueBytesOption.HasValue);
byte[] returnedValueBytes = returnedValueBytesOption.OrDefault();
Assert.True(valueBytes.SequenceEqual(returnedValueBytes));
Assert.Equal(value, returnedValueBytes.FromBytes());
Assert.True(await columnFamilyDbStore.Contains(keyBytes));
Assert.False(await columnFamilyDbStore.Contains("key2".ToBytes()));
await columnFamilyDbStore.Remove(keyBytes);
returnedValueBytesOption = await columnFamilyDbStore.Get(keyBytes);
Assert.False(returnedValueBytesOption.HasValue);
}
public IDbStore GetDbStore(string partitionName)
{
Preconditions.CheckNonWhiteSpace(partitionName, nameof(partitionName));
IDbStore dbStore = this.partitionDbStoreDictionary.GetOrAdd(partitionName, new InMemoryDbStore());
return(dbStore);
}
public async Task FirstLastTest()
{
IDbStore columnFamilyDbStore = this.rocksDbStoreProvider.GetColumnStoreFamily("firstLastTest");
string firstKey = "firstKey";
string firstValue = "firstValue";
await columnFamilyDbStore.Put(firstKey.ToBytes(), firstValue.ToBytes());
for (int i = 0; i < 10; i++)
{
string key = $"key{i}";
string value = "$value{i}";
await columnFamilyDbStore.Put(key.ToBytes(), value.ToBytes());
}
string lastKey = "lastKey";
string lastValue = "lastValue";
await columnFamilyDbStore.Put(lastKey.ToBytes(), lastValue.ToBytes());
Option <(byte[], byte[])> firstEntryOption = await columnFamilyDbStore.GetFirstEntry();
Assert.True(firstEntryOption.HasValue);
(byte[] key, byte[] value)firstEntry = firstEntryOption.OrDefault();
Assert.Equal(firstKey, firstEntry.key.FromBytes());
Assert.Equal(firstValue, firstEntry.value.FromBytes());
Option <(byte[], byte[])> lastEntryOption = await columnFamilyDbStore.GetLastEntry();
Assert.True(lastEntryOption.HasValue);
(byte[] key, byte[] value)lastEntry = lastEntryOption.OrDefault();
Assert.Equal(lastKey, lastEntry.key.FromBytes());
Assert.Equal(lastValue, lastEntry.value.FromBytes());
}
public UnitOfWork(Container container, IsolationLevel isolationLevel)
{
_scope = AsyncScopedLifestyle.BeginScope(container);
_dbStore = _scope.GetInstance <IDbStore>();
_session = GetSession(_dbStore);
_transaction = _session.BeginTransaction(isolationLevel);
}
public static CheckpointStore Create(IDbStoreProvider dbStoreProvider)
{
IDbStore dbStore = Preconditions.CheckNotNull(dbStoreProvider, nameof(dbStoreProvider)).GetDbStore(Constants.CheckpointStorePartitionKey);
IEntityStore <string, CheckpointEntity> underlyingStore = new EntityStore <string, CheckpointEntity>(dbStore, nameof(CheckpointEntity), 12);
return(new CheckpointStore(underlyingStore));
}
public async Task GetRemoveDefaultPartitionTestAsync()
{
var options = new RocksDbOptionsProvider(new SystemEnvironment(), true);
var partitionsList = new[]
{
"Partition1"
};
using (IDbStoreProvider rocksDbStoreProvider = DbStoreProvider.Create(options, this.rocksDbFolder, partitionsList))
{
Assert.NotNull(rocksDbStoreProvider);
IDbStore store = rocksDbStoreProvider.GetDbStore();
string key = "key";
string val = "val";
byte[] valBytes = val.ToBytes();
await store.Put(key.ToBytes(), valBytes);
Option <byte[]> valRetrieved = await store.Get("key".ToBytes());
byte[] valRetrievedBytes = valRetrieved.GetOrElse(string.Empty.ToBytes());
Assert.True(valRetrievedBytes.SequenceEqual(valBytes));
}
}
public async Task MessageCountTest()
{
using (IDbStore columnFamilyDbStore = this.rocksDbStoreProvider.GetDbStore("test"))
{
Assert.Equal(0ul, await columnFamilyDbStore.Count());
for (int i = 0; i < 10; i++)
{
string key = $"key{i}";
string value = "$value{i}";
await columnFamilyDbStore.Put(key.ToBytes(), value.ToBytes());
}
Assert.Equal(10ul, await columnFamilyDbStore.Count());
}
using (IDbStore columnFamilyDbStore = this.rocksDbStoreProvider.GetDbStore("test"))
{
Assert.Equal(10ul, await columnFamilyDbStore.Count());
for (int i = 0; i < 10; i++)
{
string key = $"key{i}";
await columnFamilyDbStore.Remove(key.ToBytes());
}
Assert.Equal(0ul, await columnFamilyDbStore.Count());
}
}
public IEntityStore <TK, TV> GetEntityStore <TK, TV>(string entityName)
{
IDbStore entityDbStore = this.dbStoreProvider.GetDbStore(Preconditions.CheckNonWhiteSpace(entityName, nameof(entityName)));
IEntityStore <TK, TV> entityStore = new EntityStore <TK, TV>(entityDbStore, entityName, 12);
return(entityStore);
}
IEntityStore <TK, TV> GetEntityStore <TK, TV>(string entityName, IDbStore entityDbStore)
{
IKeyValueStore <TK, TV> dbStoreMapper = new KeyValueStoreMapper <TK, byte[], TV, byte[]>(entityDbStore, new BytesMapper <TK>(), new BytesMapper <TV>());
IEntityStore <TK, TV> entityStore = new EntityStore <TK, TV>(dbStoreMapper, entityName, 12);
IEntityStore <TK, TV> timedEntityStore = new TimedEntityStore <TK, TV>(entityStore, this.operationTimeout);
return(timedEntityStore);
}
public IEntityStore <TK, TV> GetEntityStore <TK, TV>(string entityName)
{
IDbStore entityDbStore = this.dbStoreProvider.GetDbStore(Preconditions.CheckNonWhiteSpace(entityName, nameof(entityName)));
IKeyValueStore <TK, TV> dbStoreMapper = new KeyValueStoreMapper <TK, byte[], TV, byte[]>(entityDbStore, new BytesMapper <TK>(), new BytesMapper <TV>());
IEntityStore <TK, TV> entityStore = new EntityStore <TK, TV>(dbStoreMapper, entityName, 12);
IEntityStore <TK, TV> timedEntityStore = new TimedEntityStore <TK, TV>(entityStore, this.operationTimeout);
return(timedEntityStore);
}
async Task DbStoreRestoreAsync(string store, IDbStore dbStore, string latestBackupDirPath)
{
try
{
IList <Item> items = await this.dataBackupRestore.RestoreAsync <IList <Item> >(store, latestBackupDirPath);
if (items != null)
{
foreach (Item item in items)
{
await dbStore.Put(item.Key, item.Value);
}
}
}
catch (IOException exception)
{
throw new IOException($"The restore operation for {latestBackupDirPath} failed with error.", exception);
}
}
async Task DbStoreBackupAsync(string store, IDbStore dbStore, string latestBackupDirPath)
{
try
{
IList <Item> items = new List <Item>();
await dbStore.IterateBatch(
int.MaxValue,
(key, value) =>
{
items.Add(new Item(key, value));
return(Task.CompletedTask);
});
await this.dataBackupRestore.BackupAsync(store, latestBackupDirPath, items);
}
catch (IOException exception)
{
throw new IOException($"The backup operation for {store} failed with error.", exception);
}
}
async Task BackupAsync()
{
this.events.StartingBackup();
Guid backupId = Guid.NewGuid();
string dbBackupDirectory = Path.Combine(this.backupPath, backupId.ToString());
BackupMetadata newBackupMetadata = new BackupMetadata(backupId, this.dataBackupRestore.DataBackupFormat, DateTime.UtcNow, this.dbStores.Keys.ToList());
BackupMetadataList backupMetadataList = new BackupMetadataList(new List <BackupMetadata> {
newBackupMetadata
});
try
{
Directory.CreateDirectory(dbBackupDirectory);
// Backup other stores.
foreach (string store in this.dbStores.Keys)
{
IDbStore dbStore = this.dbStoreProvider.GetDbStore(store);
await this.DbStoreBackupAsync(store, dbStore, dbBackupDirectory);
}
using (StreamWriter file = File.CreateText(Path.Combine(this.backupPath, BackupMetadataFileName)))
{
JsonSerializer serializer = new JsonSerializer();
serializer.Serialize(file, backupMetadataList);
}
this.events.BackupComplete();
// Clean any old backups.
this.CleanupUnknownBackups(this.backupPath, backupMetadataList);
}
catch (Exception exception)
{
this.events.BackupFailure($"The backup operation failed with error ${exception}.");
// Clean up any artifacts of the attempted backup.
this.CleanupKnownBackups(this.backupPath, backupMetadataList);
}
}
public ChooseCourseModel(IDbStore store)
{
this.store = store;
}
public EntityStore(IDbStore dbStore, string entityName, int keyShardCount = 1)
{
this.dbStore = Preconditions.CheckNotNull(dbStore, nameof(dbStore));
this.keyLockProvider = new AsyncLockProvider <TK>(Preconditions.CheckRange(keyShardCount, 1, nameof(keyShardCount)));
this.EntityName = Preconditions.CheckNonWhiteSpace(entityName, nameof(entityName));
}
public RecordModel(IDbStore store)
{
this.store = store;
}
public static T LoadIf <T>(this IDbStore dbStore, object id)
where T : IEntity
{
return(id == null ? default(T) : dbStore.Load <T>(id));
}
public static ISession GetSession(this IDbStore dbStore)
{
return(dbStore.GetMemberValue("_session") as ISession);
}
private static ISession GetSession(IDbStore dbStore)
{
return(dbStore.GetMemberValue("_session") as ISession);
}
public ChooseStudentModel(IDbStore store)
{
this.store = store;
}
public RoleStore(IDbStore dbStore)
{
_dbStore = dbStore;
}
public StorageSpaceAwareDbStore(IDbStore dbStore, IStorageSpaceChecker diskSpaceChecker)
: base(dbStore)
{
this.storageSpaceChecker = Preconditions.CheckNotNull(diskSpaceChecker, nameof(diskSpaceChecker));
}
public StudentRecordModel(IDbStore store)
{
this.store = store;
}
public TeacherModel(IDbStore store)
{
this.store = store;
}
public DbStoreDecorator(IDbStore dbStore)
{
this.dbStore = Preconditions.CheckNotNull(dbStore, nameof(dbStore));
}
public async Task SpaceCheckViolationsTest()
{
Option <long> maxStorageBytes = Option.Some(90L);
IStorageSpaceChecker checker = new MemorySpaceChecker(() => 0L);
checker.SetMaxSizeBytes(maxStorageBytes);
InMemoryDbStoreProvider storeProvider = new InMemoryDbStoreProvider(Option.Some(checker));
string store1Name = "store1";
IDbStore store1 = storeProvider.GetDbStore(store1Name);
string store2Name = "store2";
IDbStore store2 = storeProvider.GetDbStore(store2Name);
byte[] message1 = new byte[10];
byte[] message2 = new byte[20];
await store1.Put(message1, message1);
await store2.Put(message2, message2);
// Current sizes -
// store1 -> (message1 * 2)
// store2 -> (message2 * 2)
// Aggregated size is less than limit, adding another item should succeed.
byte[] message3 = new byte[30];
await store1.Put(message3, message3, CancellationToken.None);
// Current sizes -
// store1 -> (message1 * 2) + (message3 * 2)
// store2 -> (message2 * 2)
// Aggregated size is greater than limit, adding another item should fail.
byte[] message4 = new byte[40];
await Assert.ThrowsAsync <StorageFullException>(() => store2.Put(message4, message4));
await Assert.ThrowsAsync <StorageFullException>(() => store2.Put(message4, message4, CancellationToken.None));
// Remove store2. The usage of store1 alone should be less than the max limit.
// Current sizes -
// store1 -> (message1 * 2) + (message3 * 2)
// store2 -> X
// Aggregated size is less than limit, adding another item should succeed.
storeProvider.RemoveDbStore(store2Name);
await store1.Put(message4, message4);
// Current sizes -
// store1 -> (message1 * 2) + (message3 * 2) + (message4 * 2)
// store2 -> X
// Aggregated size is greater than limit, adding another item should fail.
byte[] message5 = new byte[45];
await Assert.ThrowsAsync <StorageFullException>(() => store1.Put(message5, message5));
// Re-add store2.
store2 = storeProvider.GetDbStore(store2Name);
await store1.Remove(message4);
// Current sizes -
// store1 -> (message1 * 2) + (message3 * 2)
// store2 -> X
// Aggregated size is less than limit, adding another item should succeed.
await store2.Put(message1, message1);
// Current sizes -
// store1 -> (message1 * 2) + (message3 * 2)
// store2 -> (message1 * 2)
// Aggregated size is greater than limit, adding another item should fail.
await Assert.ThrowsAsync <StorageFullException>(() => store2.Put(message5, message5));
// Remove an item from store1 and then try adding a smaller item to store2 which should succeed.
await store1.Remove(message3, CancellationToken.None);
// Current sizes -
// store1 -> (message1 * 2)
// store2 -> (message1 * 2)
// Aggregated size is less than limit, adding another item should succeed.
await store2.Put(message3, message3, CancellationToken.None);
// Current sizes -
// store1 -> (message1 * 2)
// store2 -> (message1 * 2) + (message3 * 2)
// Aggregated size is greater than limit, adding another item should fail.
await Assert.ThrowsAsync <StorageFullException>(() => store2.Put(message4, message4));
// Set max storage size to be greater than the current db size.
Option <long> newMaxStorageBytes = Option.Some((message1.Length * 2) * 2L + (message3.Length * 2) + 10);
checker.SetMaxSizeBytes(newMaxStorageBytes);
// Adding another item should now succeed after the limits have been increased.
await store1.Put(message4, message4);
// Adding a new item to store1 should fail.
// Current sizes -
// store1 -> (message1 * 2) + (message4 * 2)
// store2 -> (message1 * 2) + (message3 * 2)
// Aggregated size is greater than limit, adding another item should fail.
await Assert.ThrowsAsync <StorageFullException>(() => store1.Put(message5, message5));
// Updating the message4 item in store1 should succeed as the size difference between
// the existing and updated value is zero bytes which doesn't lead to the limit being breached.
await store1.Put(message4, message4);
}
public ClassModel(IDbStore store)
{
this.store = store;
}