Socket provider

Summary:
Abstract the socket creation from FlipperConnectionManagerImpl. Instead, use FlipperSocketProvider.

There's a default provider which will always return RSocket sockets. This provider can be changed and thus can return other implementations.

Reviewed By: fabiomassimo

Differential Revision: D30396322

fbshipit-source-id: 0583865376809260b0240e5bd653d73f2fa514b1

xplat/Flipper/FlipperSocketProvider.h

@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#pragma once
+
+#include <folly/io/async/EventBase.h>
+#include <memory>
+
+namespace facebook {
+namespace flipper {
+
+class FlipperSocket;
+class FlipperConnectionManager;
+class ConnectionContextStore;
+struct FlipperConnectionEndpoint;
+struct FlipperSocketBasePayload;
+
+/**
+    A socket provider is responsible of the creation of FlipperSocket instances.
+ It also defines static factory methods that can be used to construct such
+ instances.
+ */
+class FlipperSocketProvider {
+ public:
+  virtual ~FlipperSocketProvider() {}
+  /**
+   Create an instance of FlipperSocket.
+   @param endpoint Endpoint to connect to.
+   @param payload Any configuration payload to establish a connection with
+   the specified endpoint.
+   @param eventBase A folly event base used to execute connection operations.
+   */
+  virtual std::unique_ptr<FlipperSocket> create(
+      FlipperConnectionEndpoint endpoint,
+      std::unique_ptr<FlipperSocketBasePayload> payload,
+      folly::EventBase* eventBase) = 0;
+  /**
+   Create an instance of FlipperSocket.
+   @param endpoint Endpoint to connect to.
+   @param payload Any configuration payload to establish a connection with
+   the specified endpoint.
+   @param eventBase A folly event base used to execute connection operations.
+   @param connectionContextStore A connection context store used for obtaining
+   the certificate used for secure connections.
+   */
+  virtual std::unique_ptr<FlipperSocket> create(
+      FlipperConnectionEndpoint endpoint,
+      std::unique_ptr<FlipperSocketBasePayload> payload,
+      folly::EventBase* eventBase,
+      ConnectionContextStore* connectionContextStore) = 0;
+
+  static std::unique_ptr<FlipperSocket> socketCreate(
+      FlipperConnectionEndpoint endpoint,
+      std::unique_ptr<FlipperSocketBasePayload> payload,
+      folly::EventBase* eventBase);
+  static std::unique_ptr<FlipperSocket> socketCreate(
+      FlipperConnectionEndpoint endpoint,
+      std::unique_ptr<FlipperSocketBasePayload> payload,
+      folly::EventBase* eventBase,
+      ConnectionContextStore* connectionContextStore);
+
+  static void setDefaultProvider(
+      std::unique_ptr<FlipperSocketProvider> provider);
+
+ private:
+  static std::unique_ptr<FlipperSocketProvider> provider_;
+};
+
+} // namespace flipper
+} // namespace facebook