/// <summary>
/// Asynchronously returns a channel from this pool, creating a new one if there is no channel
/// already associated with <paramref name="endpoint"/>.
/// The specified channel options are applied, but only those options.
/// </summary>
/// <param name="grpcAdapter">The gRPC implementation to use. Must not be null.</param>
/// <param name="endpoint">The endpoint to connect to. Must not be null.</param>
/// <param name="channelOptions">The channel options to include. May be null.</param>
/// <param name="cancellationToken">A cancellation token for the operation.</param>
/// <returns>A task representing the asynchronous operation. The value of the completed
/// task will be channel for the specified endpoint.</returns>
internal async Task <ChannelBase> GetChannelAsync(GrpcAdapter grpcAdapter, string endpoint, GrpcChannelOptions channelOptions, CancellationToken cancellationToken)
{
GaxPreconditions.CheckNotNull(grpcAdapter, nameof(grpcAdapter));
GaxPreconditions.CheckNotNull(endpoint, nameof(endpoint));
var credentials = await WithCancellationToken(_lazyScopedDefaultChannelCredentials.Value, cancellationToken).ConfigureAwait(false);
return(GetChannel(grpcAdapter, endpoint, channelOptions, credentials));
}
/// <summary>
/// Returns a channel from this pool, creating a new one if there is no channel
/// already associated with <paramref name="endpoint"/>.
/// The specified channel options are applied, but only those options.
/// </summary>
/// <param name="grpcAdapter">The gRPC implementation to use. Must not be null.</param>
/// <param name="endpoint">The endpoint to connect to. Must not be null.</param>
/// <param name="channelOptions">The channel options to include. May be null.</param>
/// <returns>A channel for the specified endpoint.</returns>
internal ChannelBase GetChannel(GrpcAdapter grpcAdapter, string endpoint, GrpcChannelOptions channelOptions)
{
GaxPreconditions.CheckNotNull(grpcAdapter, nameof(grpcAdapter));
GaxPreconditions.CheckNotNull(endpoint, nameof(endpoint));
var credentials = _lazyScopedDefaultChannelCredentials.Value.ResultWithUnwrappedExceptions();
return(GetChannel(grpcAdapter, endpoint, channelOptions, credentials));
}
/// <summary>
/// Returns a channel from this pool, creating a new one if there is no channel
/// already associated with <paramref name="endpoint"/>.
/// The specified channel options are applied, but only those options.
/// </summary>
/// <param name="grpcAdapter">The gRPC implementation to use. Must not be null.</param>
/// <param name="endpoint">The endpoint to connect to. Must not be null.</param>
/// <param name="channelOptions">The channel options to include. May be null.</param>
/// <returns>A channel for the specified endpoint.</returns>
internal ChannelBase GetChannel(GrpcAdapter grpcAdapter, string endpoint, GrpcChannelOptions channelOptions)
{
GaxPreconditions.CheckNotNull(grpcAdapter, nameof(grpcAdapter));
GaxPreconditions.CheckNotNull(endpoint, nameof(endpoint));
var credentials = _credentialCache.GetCredentials();
return(GetChannel(grpcAdapter, endpoint, channelOptions, credentials));
}
private ChannelBase GetChannel(GrpcAdapter grpcAdapter, string endpoint, GrpcChannelOptions channelOptions, ChannelCredentials credentials)
{
var key = new Key(grpcAdapter, endpoint, channelOptions);
lock (_lock)
{
ChannelBase channel;
if (!_channels.TryGetValue(key, out channel))
{
channel = grpcAdapter.CreateChannel(endpoint, credentials, channelOptions);
_channels[key] = channel;
}
return(channel);
}
}
public bool Equals(Key other) => GrpcAdapter.Equals(other.GrpcAdapter) && Endpoint.Equals(other.Endpoint) && Options.Equals(other.Options);
public override int GetHashCode() =>
GaxEqualityHelpers.CombineHashCodes(
GrpcAdapter.GetHashCode(),
Endpoint.GetHashCode(),
Options.GetHashCode());
public Key(GrpcAdapter grpcAdapter, string endpoint, GrpcChannelOptions options) => (GrpcAdapter, Endpoint, Options) = (grpcAdapter, endpoint, options);
