/// <summary>
/// Check if a specific flag is set
/// </summary>
/// <param name="value">Flag to check</param>
/// <returns>True if set, false if unset</returns>
public bool IsSet(DatabaseChanges value)
{
// If value is None, then the enum must be zero, since no other change could have happened
if (value == DatabaseChanges.None)
{
return(value == 0);
}
return((DatabaseChanges & value) != 0);
}
private void CreateDatabase(DatabaseChanges dbChanges)
{
this.AddOperation(new CreateDatabase {
Database = dbChanges.NewDatabase.Name
});
foreach (var table in dbChanges.NewDatabase.Tables)
{
if (!dbChanges.NewDatabase.IsIgnored(table.Name))
{
this.AddTable(table);
}
}
}
private Result AutoMigrate(DatabaseChanges changeSet, DateTime?maxTime = null)
{
//生成所有自动迁移操作
var auto = new AutomationMigration()
{
Context = this
};
auto.GenerateOpertions(changeSet);
var autoMigrations = auto.Operations;
if (autoMigrations.Count > 0)
{
this.GenerateTimeId(autoMigrations, maxTime);
return(this.MigrateUpBatch(autoMigrations));
}
return(true);
}
private void DropDatabase(DatabaseChanges dbChanges)
{
//反向按表间的引用关系删除表。
var tables = dbChanges.OldDatabase.Tables;
for (int i = tables.Count - 1; i >= 0; i--)
{
if (!dbChanges.NewDatabase.IsIgnored(tables[i].Name))
{
this.RemoveTable(tables[i]);
}
}
//当版本号嵌入到当前数据库中时，也不支持自动 DropDatabase。
if (!Context.DbVersionProvider.IsEmbaded())
{
this.AddOperation(new DropDatabase {
Database = dbChanges.OldDatabase.Name
});
}
}
public void GenerateOpertions(DatabaseChanges dbChanges)
{
this._operations.Clear();
switch (dbChanges.ChangeType)
{
case ChangeType.Added:
this.CreateDatabase(dbChanges);
break;
case ChangeType.Removed:
this.DropDatabase(dbChanges);
break;
case ChangeType.Modified:
//为了保证外键的变化与表的变化不冲突，按照以下顺序生成操作：添加的表、修改的表（外键）、删除的表。
foreach (var item in dbChanges.TablesChanged.Where(t => t.ChangeType == ChangeType.Added))
{
this.GenerateOpertions(item);
}
foreach (var item in dbChanges.TablesChanged.Where(t => t.ChangeType == ChangeType.Modified))
{
this.GenerateOpertions(item);
}
foreach (var item in dbChanges.TablesChanged.Where(t => t.ChangeType == ChangeType.Removed))
{
this.GenerateOpertions(item);
}
break;
default:
break;
}
foreach (var action in this._relationActions)
{
action();
}
this._relationActions.Clear();
}
/// <summary>
/// Connects to raven traffic event source and registers all the requests to the file defined in the config
/// </summary>
/// <param name="config">configuration containing the connection, the file to write to, etc.</param>
/// <param name="store">the store to work with</param>
private async Task RecordRequests(TrafficToolConfiguration config, IDocumentStore store)
{
var id = Guid.NewGuid().ToString();
using (var client = DatabaseChanges.CreateClientWebSocket(store.GetRequestExecutor()))
{
var url = store.Urls.First() + "/admin/traffic-watch";
var uri = new Uri(url.ToWebSocketPath());
await client.ConnectAsync(uri, CancellationToken.None)
.ConfigureAwait(false);
// record traffic no more then 7 days
var day = 24 * 60 * 60;
var timeout = (int)config.Timeout.TotalMilliseconds / 1000;
timeout = Math.Min(timeout, 7 * day);
if (timeout <= 0)
{
timeout = 7 * day;
}
try
{
string resourceName = config.ResourceName ?? "N/A";
var connectMessage = new DynamicJsonValue
{
["Id"] = id,
["DatabaseName"] = resourceName,
["Timeout"] = timeout
};
var stream = new MemoryStream();
JsonOperationContext context;
using (_jsonContextPool.AllocateOperationContext(out context))
using (var writer = new BlittableJsonTextWriter(context, stream))
{
context.Write(writer, connectMessage);
writer.Flush();
ArraySegment <byte> bytes;
stream.TryGetBuffer(out bytes);
await client.SendAsync(bytes, WebSocketMessageType.Text, true, CancellationToken.None)
.ConfigureAwait(false);
}
var requestsCounter = 0;
using (var fileStream = File.Create(config.RecordFilePath))
{
Stream finalStream = fileStream;
if (config.IsCompressed)
{
finalStream = new GZipStream(fileStream, CompressionMode.Compress, leaveOpen: true);
}
using (var streamWriter = new StreamWriter(finalStream))
{
var jsonWriter = new JsonTextWriter(streamWriter)
{
Formatting = Formatting.Indented
};
jsonWriter.WriteStartArray();
var sp = Stopwatch.StartNew();
while (true)
{
using (var reader = await Receive(client, context))
{
if (reader == null)
{
// server asked to close connection
break;
}
string type;
if (reader.TryGet("Type", out type))
{
if (type.Equals("Heartbeat"))
{
continue;
}
}
string error;
if (reader.TryGet("Error", out error))
{
throw new InvalidOperationException("Server returned error: " + error);
}
var notification = new TrafficWatchChange();
notification.TimeStamp = GetDateTimeFromJson(reader, "TimeStamp");
notification.RequestId = GetIntFromJson(reader, "RequestId");
notification.HttpMethod = GetStringFromJson(reader, "HttpMethod");
notification.ElapsedMilliseconds = GetIntFromJson(reader, "ElapsedMilliseconds");
notification.ResponseStatusCode = GetIntFromJson(reader, "ResponseStatusCode");
notification.DatabaseName = GetStringFromJson(reader, "DatabaseName");
notification.CustomInfo = GetStringFromJson(reader, "CustomInfo");
notification.InnerRequestsCount = GetIntFromJson(reader, "InnerRequestsCount");
// notification.QueryTimings = GetRavenJObjectFromJson(reader, "QueryTimings"); // TODO (TrafficWatch) : Handle this both server and client sides
if (config.PrintOutput)
{
Console.Write("\rRequest #{0} Stored...\t\t ", ++requestsCounter);
}
var jobj = JObject.FromObject(notification);
jobj.WriteTo(jsonWriter);
if (sp.ElapsedMilliseconds > 5000)
{
streamWriter.Flush();
sp.Restart();
}
}
}
jsonWriter.WriteEndArray();
streamWriter.Flush();
if (config.IsCompressed)
{
finalStream.Dispose();
}
}
}
}
catch (Exception ex)
{
Console.WriteLine("\r\n\nError while reading messages from server : " + ex);
}
finally
{
Console.WriteLine("\r\n\nClosing connection to server...`");
try
{
await
client.CloseAsync(WebSocketCloseStatus.NormalClosure, "CLOSE_NORMAL", CancellationToken.None)
.ConfigureAwait(false);
}
catch
{
// ignored
}
}
}
}
/// <summary>
/// Unset value flag in enum
/// </summary>
/// <param name="value">Flag to unset</param>
public void Unset(DatabaseChanges value)
{
DatabaseChanges &= ~value;
}
/// <summary>
/// Set value flag in enum
/// </summary>
/// <param name="value">Flag to set</param>
public void Set(DatabaseChanges value)
{
DatabaseChanges |= value;
}