private static bool TryUpdateReplicationDocument(this RavenHelper raven, Store store, Instance instance)
{
try
{
var destinations = raven.UpdateReplicationDocument(store, instance);
raven.EnsureReplicationBundleIsActive(store, instance);
logger.Info(
"Updated replication destinations for {0} to: [{1}]",
instance.Url,
string.Join(", ", destinations.Select(d => string.Format(
"{0}{1}",
d.Url,
d.TransitiveReplicationBehavior == TransitiveReplicationOptions.Replicate
? " (transitive)"
: string.Empty))));
return true;
}
catch (Exception exception)
{
logger.ErrorException(
string.Format("Failed to update replication destinations for {0}.", instance.Url),
exception);
if (exception.IsFatal())
{
throw;
}
return false;
}
}
private static void RequestData(
this RavenHelper raven,
Store store,
Dictionary<Uri, Task<DatabaseStatistics>> dbStats,
Dictionary<Uri, Task<RavenJToken>> replicationStats,
Dictionary<Uri, Task<IndexDefinition[]>> indexes)
{
foreach (var instance in store.Instances)
{
var docStore = raven.GetDocumentStore(instance.Url.GetServerRootUrl());
using (var session = docStore.OpenAsyncSession())
{
dbStats.Add(
instance.Url,
session.Advanced.DocumentStore.AsyncDatabaseCommands.ForDatabase(store.Name)
.GetStatisticsAsync());
indexes.Add(
instance.Url,
session.Advanced.DocumentStore.AsyncDatabaseCommands.ForDatabase(store.Name)
.GetIndexesAsync(0, 255));
var asyncServerClient = session.Advanced.DocumentStore.AsyncDatabaseCommands
.ForDatabase(store.Name) as AsyncServerClient;
replicationStats.Add(
instance.Url,
asyncServerClient
.CreateRequest("/replication/info?noCache=" + Guid.NewGuid(), "GET")
.ReadResponseJsonAsync());
}
}
}
private static void EnsureReplicationBundleIsActive(this RavenHelper raven, Store store, Instance instance)
{
var docStore = raven.GetDocumentStore(instance.Url.GetServerRootUrl());
docStore.DatabaseCommands.EnsureDatabaseExists(store.Name);
using (var session = docStore.OpenSession())
{
session.Advanced.UseOptimisticConcurrency = true;
var dbDoc = session.Load<RavenJObject>("Raven/Databases/" + store.Name);
var settings = dbDoc["Settings"].Value<RavenJObject>();
var activeBundles = settings[Constants.ActiveBundles] ?? "";
var bundles = activeBundles.Value<string>()
.Split(new[] { ';' }, StringSplitOptions.RemoveEmptyEntries)
.Select(x => x.Trim())
.ToArray();
if (!bundles.Contains("Replication"))
{
var newActiveBundles = string.Join(
";",
bundles.Concat(new[] { "Replication" }).ToArray());
settings[Constants.ActiveBundles] = newActiveBundles;
session.Store(dbDoc);
session.SaveChanges();
}
}
}
public static async Task<StoreStats> GetStats(this RavenHelper raven, Store store)
{
var dbStats = new Dictionary<Uri, Task<DatabaseStatistics>>();
var replicationStats = new Dictionary<Uri, Task<RavenJToken>>();
var indexes = new Dictionary<Uri, Task<IndexDefinition[]>>();
raven.RequestData(store, dbStats, replicationStats, indexes);
var responses = await GatherResponses(store, dbStats, replicationStats, indexes);
var storeStats = CreateStats(store, responses);
return storeStats;
}
public static void UpdateTracerDocuments(this RavenHelper raven, Store store)
{
var tasks = new List<Task>();
foreach (var instance in store.Instances)
{
var task = new Task(() => raven.UpdateTracerDocument(store, instance));
tasks.Add(task);
task.Start();
}
Task.WaitAll(tasks.ToArray(), TimeSpan.FromSeconds(5));
}
public static IEnumerable<string> UpdateReplicationDocuments(this RavenHelper raven, Store store)
{
var results = new Collection<string>();
foreach (var instance in store.Instances)
{
if (!raven.TryUpdateReplicationDocument(store, instance))
{
results.Add(
string.Format(
"Failed to update replication destinations for {0}",
instance.Url));
}
}
return results;
}
private static async Task<List<InstanceStatsHolder>> GatherResponses(
Store store,
Dictionary<Uri, Task<DatabaseStatistics>> dbStats,
Dictionary<Uri, Task<RavenJToken>> replicationStats,
Dictionary<Uri, Task<IndexDefinition[]>> indexes)
{
var responses = new List<InstanceStatsHolder>();
foreach (var instance in store.Instances)
{
var response = new InstanceStatsHolder { Url = instance.Url };
try
{
response.DatabaseStats = await dbStats[instance.Url];
var indexData = await indexes[instance.Url];
response.IndexHashCodes = indexData.ToDictionary(
i => i.Name,
i => i.GetHashCode());
var data = await replicationStats[instance.Url];
response.ReplicationStats = new RavenImports.JsonSerializer()
.Deserialize<ReplicationStatistics>(new RavenJTokenReader(data));
}
catch (Exception exception)
{
if (exception.IsFatal()) { throw; }
// TODO: Log exception.
response.DatabaseStats = response.DatabaseStats
?? new DatabaseStatistics();
response.ReplicationStats = response.ReplicationStats
?? new ReplicationStatistics { Self = response.Url.ToString() };
}
responses.Add(response);
}
return responses;
}
private static void UpdateTracerDocument(this RavenHelper raven, Store store, Instance instance)
{
try
{
var tracerId = "brnkly/raven/tracers/" + instance.Url.Authority.Replace(":", "_");
var docStore = raven.GetDocumentStore(instance.Url.GetServerRootUrl());
using (var session = docStore.OpenSession(store.Name))
{
session.Advanced.UseOptimisticConcurrency = true;
var tracer = session.Load<Tracer>(tracerId)
?? new Tracer { UpdatedAtUtc = DateTimeOffset.UtcNow };
tracer.UpdatedAtUtc = DateTimeOffset.UtcNow;
session.Store(tracer, tracerId);
session.SaveChanges();
}
logger.Debug("Tracer document updated for {0}", instance.Url);
}
catch (Exception exception)
{
logger.ErrorException(
string.Format("Failed to update tracer document for {0}", instance.Url),
exception);
if (exception.IsFatal())
{
throw;
}
}
}
private static IEnumerable<ReplicationDestination> UpdateReplicationDocument(this RavenHelper raven, Store store, Instance instance)
{
var docStore = raven.GetDocumentStore(instance.Url.GetServerRootUrl());
docStore.DatabaseCommands.EnsureDatabaseExists(store.Name);
using (var session = docStore.OpenSession(store.Name))
{
session.Advanced.UseOptimisticConcurrency = true;
var replicationDoc =
session.Load<ReplicationDocument>(Constants.RavenReplicationDestinations) ??
new ReplicationDocument();
replicationDoc.Destinations = instance.Destinations
.Where(d => !d.Url.Equals(instance.Url.ToString(), StringComparison.OrdinalIgnoreCase))
.ToList();
session.Store(replicationDoc);
session.SaveChanges();
return replicationDoc.Destinations;
}
}
private static StoreStats CreateStats(Store store, IEnumerable<InstanceStatsHolder> responses)
{
var storeStats = new StoreStats { Name = store.Name };
AddStoreIndexStats(storeStats, responses);
foreach (var instance in store.Instances)
{
var response = responses.Where(r => r.Url == instance.Url).FirstOrDefault();
AddInstanceIndexStats(storeStats, response);
storeStats.Replication.Add(response.ReplicationStats);
}
return storeStats;
}
