Built motion from commit 6a09e18b.|2.6.11

[motion2.git] / legacy-libs / grpc-cloned / deps / grpc / src / core / ext / filters / client_channel / lb_policy_registry.h

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+/*
+ *
+ * Copyright 2015 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#ifndef GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_REGISTRY_H
+#define GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_REGISTRY_H
+
+#include <grpc/support/port_platform.h>
+
+#include "src/core/ext/filters/client_channel/lb_policy_factory.h"
+#include "src/core/lib/gprpp/memory.h"
+#include "src/core/lib/gprpp/orphanable.h"
+
+namespace grpc_core {
+
+class LoadBalancingPolicyRegistry {
+ public:
+  /// Methods used to create and populate the LoadBalancingPolicyRegistry.
+  /// NOT THREAD SAFE -- to be used only during global gRPC
+  /// initialization and shutdown.
+  class Builder {
+   public:
+    /// Global initialization and shutdown hooks.
+    static void InitRegistry();
+    static void ShutdownRegistry();
+
+    /// Registers an LB policy factory.  The factory will be used to create an
+    /// LB policy whose name matches that of the factory.
+    static void RegisterLoadBalancingPolicyFactory(
+        UniquePtr<LoadBalancingPolicyFactory> factory);
+  };
+
+  /// Creates an LB policy of the type specified by \a name.
+  static OrphanablePtr<LoadBalancingPolicy> CreateLoadBalancingPolicy(
+      const char* name, LoadBalancingPolicy::Args args);
+
+  /// Returns true if the LB policy factory specified by \a name exists in this
+  /// registry. If the load balancing policy requires a config to be specified
+  /// then sets \a requires_config to true.
+  static bool LoadBalancingPolicyExists(const char* name,
+                                        bool* requires_config);
+
+  /// Returns a parsed object of the load balancing policy to be used from a
+  /// LoadBalancingConfig array \a json.
+  static RefCountedPtr<LoadBalancingPolicy::Config> ParseLoadBalancingConfig(
+      const grpc_json* json, grpc_error** error);
+};
+
+}  // namespace grpc_core
+
+#endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_REGISTRY_H */