public static RemoteSession Clone(RemoteSession source, CancellationTokenSource cts)
{
var retVal = new RemoteSession(source);
retVal._cancellationTokenSource = cts;
return(retVal);
}
public static RemoteSession Clone(RemoteSession source)
{
if (!source.Disposed)
{
return(source);
}
return(new RemoteSession(source));
}
private RemoteSession(RemoteSession source)
{
_workExecutor = source._workExecutor;
_cancellationTokenSource = source._cancellationTokenSource;
_id = source._id;
_baseUrl = source._baseUrl;
Authenticator = source.Authenticator;
RequestHeaders = source.RequestHeaders;
ServerType = source.ServerType;
CookieStore = source.CookieStore;
}
private RemoteSession(RemoteSession source)
{
_workExecutor = source._workExecutor;
_id = source._id;
_baseUrl = source._baseUrl;
Authenticator = source.Authenticator;
RequestHeaders = source.RequestHeaders;
ServerType = source.ServerType;
CookieStore = source.CookieStore;
ClientFactory = source.ClientFactory;
}
protected ChangeTracker(ChangeTrackerOptions options)
{
options.Validate();
Backoff = new ChangeTrackerBackoff(options.RetryStrategy);
DatabaseUrl = options.DatabaseUri;
Client = options.Client;
Mode = options.Mode;
Heartbeat = DefaultHeartbeat;
_includeConflicts = options.IncludeConflicts;
LastSequenceId = options.LastSequenceID;
_workExecutor = options.WorkExecutor ?? new TaskFactory(new SingleTaskThreadpoolScheduler());
_remoteSession = options.RemoteSession;
_usePost = options.UsePost;
}
private RemoteSession(RemoteSession source)
{
_workExecutor = source._workExecutor;
_id = source._id;
_baseUrl = source._baseUrl;
Authenticator = source.Authenticator;
RequestHeaders = source.RequestHeaders;
ServerType = source.ServerType;
CookieStore = source.CookieStore;
ClientFactory = source.ClientFactory;
}
public static RemoteSession Clone(RemoteSession source, CancellationTokenSource cts)
{
var retVal = new RemoteSession(source);
retVal._cancellationTokenSource = cts;
return retVal;
}
/// <summary>
/// Default constructor
/// </summary>
/// <param name="db">The local database to replicate to/from</param>
/// <param name="remote">The remote Uri to sync with</param>
/// <param name="continuous">If set to <c>true</c> continuous.</param>
/// <param name="clientFactory">The client factory for instantiating the HttpClient used to create web requests</param>
/// <param name="workExecutor">The TaskFactory to execute work on</param>
internal Replication(Database db, Uri remote, bool continuous, IHttpClientFactory clientFactory, TaskFactory workExecutor)
{
sessionID = $"repl{ Interlocked.Increment(ref _lastSessionID):000}";
var opts = new RemoteSessionContructorOptions {
BaseUrl = remote,
WorkExecutor = workExecutor,
Id = _replicatorID,
CancellationTokenSource = CancellationTokenSource
};
_remoteSession = new RemoteSession(opts);
Username = remote.UserInfo;
LocalDatabase = db;
_eventContext = LocalDatabase.Manager.CapturedContext;
Continuous = continuous;
// NOTE: Consider running a separate scheduler for all http requests.
WorkExecutor = workExecutor;
RemoteUrl = remote;
#pragma warning disable 618
Options = new ReplicationOptionsDictionary();
#pragma warning restore 618
ReplicationOptions = new ReplicationOptions();
if (RemoteUrl.Query != null && !StringEx.IsNullOrWhiteSpace(RemoteUrl.Query)) {
Authenticator = AuthenticatorFactory.CreateFromUri(remote);
// we need to remove the query from the URL, since it will cause problems when
// communicating with sync gw / couchdb
try {
RemoteUrl = new UriBuilder(remote.Scheme, remote.Host, remote.Port, remote.AbsolutePath).Uri;
} catch (UriFormatException e) {
throw Misc.CreateExceptionAndLog(Log.To.Sync, e, Tag,
"Invalid URI format for remote endpoint");
}
}
Batcher = new Batcher<RevisionInternal>(workExecutor, INBOX_CAPACITY, ProcessorDelay, inbox =>
{
try {
Log.To.Sync.V(Tag, "*** {0} BEGIN ProcessInbox ({1} sequences)", this, inbox.Count);
if(Continuous) {
FireTrigger(ReplicationTrigger.Resume);
}
ProcessInbox (new RevisionList(inbox));
Log.To.Sync.V(Tag, "*** {0} END ProcessInbox (lastSequence={1})", this, LastSequence);
} catch(Exception e) {
throw Misc.CreateExceptionAndLog(Log.To.Sync, e, Tag,
"{0} ProcessInbox failed", this);
}
});
ClientFactory = clientFactory;
_stateMachine = new StateMachine<ReplicationState, ReplicationTrigger>(ReplicationState.Initial);
InitializeStateMachine();
}
/// <summary>
/// Starts the replicator when it transitions into a running state
/// </summary>
protected virtual void StartInternal()
{
Log.To.Sync.I(Tag, "Attempting to start {0} ({1})", IsPull ? "puller" : "pusher", _replicatorID);
_remoteSession = RemoteSession.Clone (_remoteSession, CancellationTokenSource);
_remoteSession.Setup (ReplicationOptions);
if (!LocalDatabase.IsOpen) {
Log.To.Sync.W(Tag, "Not starting because local database is not open.");
FireTrigger(ReplicationTrigger.StopImmediate);
return;
}
var authorizer = Authenticator as IAuthorizer;
if (authorizer != null) {
authorizer.RemoteUrl = RemoteUrl;
authorizer.LocalUUID = LocalDatabase.PublicUUID ();
}
var reachabilityManager = LocalDatabase.Manager.NetworkReachabilityManager;
reachabilityManager.StatusChanged += NetworkStatusChanged;
if (!LocalDatabase.Manager.NetworkReachabilityManager.CanReach(RemoteUrl.AbsoluteUri, ReplicationOptions.RequestTimeout)) {
Log.To.Sync.I(Tag, "Remote endpoint is not reachable, going offline...");
LastError = LocalDatabase.Manager.NetworkReachabilityManager.LastError;
FireTrigger(ReplicationTrigger.GoOffline);
CheckOnlineLoop();
}
LocalDatabase.AddReplication(this);
if(!LocalDatabase.AddActiveReplication(this)) {
#if DEBUG
var activeReplicators = default(IList<Replication>);
if(!LocalDatabase.ActiveReplicators.AcquireTemp(out activeReplicators)) {
Log.To.Sync.E(Tag, "Active replication list unavailable!");
} else {
var existing = activeReplicators.FirstOrDefault(x => x.RemoteCheckpointDocID() == RemoteCheckpointDocID());
if(existing != null) {
Log.To.Sync.W(Tag, "Not starting because identical {0} already exists ({1})", IsPull ? "puller" : "pusher", existing._replicatorID);
} else {
Log.To.Sync.E(Tag, "Not starting {0} for unknown reasons", IsPull ? "puller" : "pusher");
}
}
#else
Log.To.Sync.W(Tag, "Not starting becuse identical {0} already exists", IsPull ? "puller" : "pusher");
#endif
FireTrigger(ReplicationTrigger.StopImmediate);
return;
}
_retryIfReadyTokenSource = CancellationTokenSource.CreateLinkedTokenSource(CancellationTokenSource.Token);
if (ReplicationOptions.Reset) {
LocalDatabase.SetLastSequence(null, RemoteCheckpointDocID());
}
_startTime = DateTime.UtcNow;
SetupRevisionBodyTransformationFunction();
Log.To.Sync.I(Tag, "Beginning replication process...");
LastSequence = null;
Login();
}
public RemoteLogin(Uri remoteUrl, string localUUID, RemoteSession session)
{
_remoteUrl = remoteUrl;
_localUUID = localUUID;
_session = session;
}
