public static async Task <JsonRpcSession> CreateAsync(
Optional <Func <CancellationToken, Task <PinnedRemotableDataScope> > > getSnapshotAsync,
object callbackTarget,
Stream serviceStream,
Stream snapshotStreamOpt,
CancellationToken cancellationToken)
{
var snapshot = getSnapshotAsync.Value == null ? null : await getSnapshotAsync.Value(cancellationToken).ConfigureAwait(false);
JsonRpcSession session;
try
{
session = new JsonRpcSession(snapshot, callbackTarget, serviceStream, snapshotStreamOpt, cancellationToken);
}
catch
{
snapshot?.Dispose();
throw;
}
try
{
await session.InitializeAsync().ConfigureAwait(false);
}
catch when(!cancellationToken.IsCancellationRequested)
{
// The session disposes of itself when cancellation is requested.
session.Dispose();
throw;
}
return(session);
}
public SnapshotJsonRpcClient(JsonRpcSession owner, Stream stream, CancellationToken cancellationToken)
: base(stream, callbackTarget: null, useThisAsCallback: true, cancellationToken: cancellationToken)
{
_owner = owner;
_source = new CancellationTokenSource();
StartListening();
}
public SnapshotJsonRpcClient(JsonRpcSession owner, Stream stream, CancellationToken cancellationToken)
: base(stream, callbackTarget: null, useThisAsCallback: true, cancellationToken: cancellationToken)
{
Contract.ThrowIfNull(owner.PinnedScopeOpt);
_owner = owner;
_source = new CancellationTokenSource();
StartListening();
}
protected override async Task <Session> CreateServiceSessionAsync(string serviceName, PinnedRemotableDataScope snapshot, object callbackTarget, CancellationToken cancellationToken)
{
// get stream from service hub to communicate snapshot/asset related information
// this is the back channel the system uses to move data between VS and remote host
var snapshotStream = await RequestServiceAsync(_hubClient, WellKnownServiceHubServices.SnapshotService, _hostGroup, cancellationToken).ConfigureAwait(false);
// get stream from service hub to communicate service specific information
// this is what consumer actually use to communicate information
var serviceStream = await RequestServiceAsync(_hubClient, serviceName, _hostGroup, cancellationToken).ConfigureAwait(false);
return(await JsonRpcSession.CreateAsync(snapshot, snapshotStream, callbackTarget, serviceStream, cancellationToken).ConfigureAwait(false));
}
public static async Task <JsonRpcSession> CreateAsync(
PinnedRemotableDataScope snapshot,
Stream snapshotStream,
object callbackTarget,
Stream serviceStream,
CancellationToken cancellationToken)
{
var session = new JsonRpcSession(snapshot, snapshotStream, callbackTarget, serviceStream, cancellationToken);
await session.InitializeAsync().ConfigureAwait(false);
return(session);
}
public SnapshotJsonRpcClient(JsonRpcSession owner, Stream stream) :
base(stream)
{
_owner = owner;
_source = new CancellationTokenSource();
}