public void SetUp()
{
Snapshot = new Snapshot(Guid.NewGuid(), 1, new TestSnapshot { Name = "TestName"});
_foldername = Snapshot.EventSourceId.ToString().Substring(0, 2);
_filename = Snapshot.EventSourceId.ToString().Substring(2) + ".ss";
SnapshotStore.SaveShapshot(Snapshot);
}
public void SaveSnapshot(Snapshot source)
{
FileInfo file = source.EventSourceId.GetSnapshotFileInfo(_path);
if (!file.Exists && !file.Directory.Exists)
file.Directory.Create();
var jo = JObject.FromObject(source);
WriteSnapshotTest(source, file.FullName, jo.ToString());
}
private static void WriteSnapshotTest(Snapshot source, string path, string jsonData)
{
try
{
source.EventSourceId.GetWriteLock("snapshot");
File.WriteAllText(path, source.GetType().AssemblyQualifiedName + "\n\r" + jsonData);
} finally
{
source.EventSourceId.ReleaseWriteLock("snapshot");
}
}
public void SaveShapshot(Snapshot source)
{
using (var session = _documentStore.OpenSession())
{
session.Store(new StoredSnaphot
{
Id = source.EventSourceId.ToString(),
Data = source.Payload,
EventSourceId = source.EventSourceId,
Version = source.Version
});
session.SaveChanges();
}
}
public void Saving_snapshot_should_not_throw_an_exception_when_snapshot_is_valid()
{
var targetStore = new RavenDBSnapshotStore(_documentStore);
var anId = Guid.NewGuid();
var aVersion = 12;
var snapshot = new Snapshot(anId, aVersion, new MySnapshot {Value = "Some value"});
targetStore.SaveSnapshot(snapshot);
var savedSnapshot = targetStore.GetSnapshot(anId, long.MaxValue);
savedSnapshot.EventSourceId.Should().Be(anId);
savedSnapshot.Version.Should().Be(aVersion);
((MySnapshot) savedSnapshot.Payload).Value.Should().Be("Some value");
}
/// <summary>Saves a snapshot of the specified event source.</summary>
public void SaveSnapshot(Snapshot snapshot)
{
using (var connection = new NpgsqlConnection(_connectionString))
{
// Open connection and begin a transaction so we can
// commit or rollback all the changes that has been made.
connection.Open();
using (NpgsqlTransaction transaction = connection.BeginTransaction())
{
try
{
using (var dataStream = new MemoryStream())
{
var formatter = new BinaryFormatter();
formatter.Serialize(dataStream, snapshot.Payload);
byte[] data = dataStream.ToArray();
using (var command = new NpgsqlCommand(Queries.InsertSnapshot, transaction.Connection))
{
command.Transaction = transaction;
command.Parameters.AddWithValue("EventSourceId", snapshot.EventSourceId);
command.Parameters.AddWithValue("Version", snapshot.Version);
command.Parameters.AddWithValue("Type", snapshot.GetType().AssemblyQualifiedName);
command.Parameters.AddWithValue("Data", data);
command.ExecuteNonQuery();
}
}
// Everything is handled, commit transaction.
transaction.Commit();
}
catch
{
// Something went wrong, rollback transaction.
transaction.Rollback();
throw;
}
}
}
}
public void SaveShapshot(Snapshot source)
{
}
/// <summary>
/// Saves a snapshot of the specified event source.
/// </summary>
public void SaveShapshot(Snapshot snapshot)
{
_snapshots[snapshot.EventSourceId] = snapshot;
}
public void SetUp()
{
Snapshot = new Snapshot(Guid.NewGuid(), 1, new TestSnapshot { Name = "Name" });
SnapshotStore.SaveSnapshot(Snapshot);
_retrieved = SnapshotStore.GetSnapshot(Snapshot.EventSourceId, long.MaxValue);
}
public void Saving_snapshot_should_not_throw_an_exception_when_snapshot_is_valid()
{
var targetStore = new MsSqlServerEventStore(connectionString);
var anId = Guid.NewGuid();
var aVersion = 12;
var snapshot = new Snapshot(anId, aVersion, new MySnapshot());
targetStore.SaveShapshot(snapshot);
var savedSnapshot = targetStore.GetSnapshot(anId, long.MaxValue);
savedSnapshot.EventSourceId.Should().Be(anId);
savedSnapshot.Version.Should().Be(aVersion);
}
/// <summary>Gets a snapshot of a particular event source, if one exists. Otherwise, returns <c>null</c>.</summary>
/// <param name="eventSourceId">Indicates the event source to retrieve the snapshot for.</param>
/// <param name="maxVersion">Indicates the maximum allowed version to be returned.</param>
/// <returns>Returns the most recent <see cref="Snapshot"/> that exists in the store. If the store has a
/// snapshot that is more recent than the <paramref name="maxVersion"/>, then <c>null</c> will be returned.</returns>
public Snapshot GetSnapshot(Guid eventSourceId, long maxVersion)
{
using (var connection = new SqlConnection(_connectionString))
{
// Open connection and begin a transaction so we can
// commit or rollback all the changes that has been made.
// QUESTION: Was this supposed to be done inside of a transaction?
connection.Open();
using (var command = new SqlCommand(Queries.SelectLatestSnapshot, connection))
{
command.Parameters.AddWithValue("@EventSourceId", eventSourceId);
using (var reader = command.ExecuteReader())
{
if (reader.Read())
{
var snapshotData = (byte[])reader["Data"];
using (var buffer = new MemoryStream(snapshotData))
{
var formatter = new BinaryFormatter();
var payload = formatter.Deserialize(buffer);
var theSnapshot = new Snapshot(eventSourceId, (long)reader["Version"], payload);
// QUESTION: Does it make sense to have this check performed in the SQL Query that way
// an older snapshot could be returned if it does exist?
return theSnapshot.Version > maxVersion ? null : theSnapshot;
}
}
return null;
}
}
}
}
public when_getting_the_snapshot()
{
Snapshot = new Snapshot(Guid.NewGuid(), 1, new TestSnapshot { Name = "Name" });
SnapshotStore.SaveSnapshot(Snapshot);
_retrieved = SnapshotStore.GetSnapshot(Snapshot.EventSourceId, long.MaxValue);
}
public void SaveShapshot(Snapshot source)
{
Contract.Requires<ArgumentNullException>(source != null, "The source cannot be null.");
}
public virtual void InitializeFromSnapshot(Snapshot snapshot)
{
Contract.Requires<ArgumentNullException>(snapshot != null, "The snapshot cannot be null.");
Log.DebugFormat("Initializing event source {0} from snapshot (version {1}).", snapshot.EventSourceId, snapshot.Version);
_eventSourceId = snapshot.EventSourceId;
_initialVersion = _currentVersion = snapshot.Version;
}
/// <summary>
/// Gets a snapshot of a particular event source, if one exists. Otherwise, returns <c>null</c>.
/// </summary>
public Snapshot GetSnapshot(Guid eventSourceId, long maxVersion)
{
using (var connection = new NpgsqlConnection(_connectionString))
{
// Open connection and begin a transaction so we can
// commit or rollback all the changes that has been made.
connection.Open();
using (var command = new NpgsqlCommand(Queries.SelectLatestSnapshot, connection))
{
command.Parameters.AddWithValue("@EventSourceId", eventSourceId);
using (var reader = command.ExecuteReader())
{
if (reader.FieldCount > 0)
{
var snapshotData = (byte[])reader["Data"];
using (var buffer = new MemoryStream(snapshotData))
{
var formatter = new BinaryFormatter();
object payload = formatter.Deserialize(buffer);
var theSnapshot = new Snapshot(eventSourceId, (long)reader["Version"], payload);
return theSnapshot.Version > maxVersion
? null
: theSnapshot;
}
}
return null;
}
}
}
}
