1 files changed, 68 insertions, 0 deletions
diff --git a/src/core/lib/channel/channelz.h b/src/core/lib/channel/channelz.h
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+++ b/src/core/lib/channel/channelz.h
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+/*
+ *
+ * Copyright 2018 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_LIB_CHANNEL_CHANNELZ_H
+#define GRPC_CORE_LIB_CHANNEL_CHANNELZ_H
+
+#include <grpc/impl/codegen/port_platform.h>
+
+#include <grpc/grpc.h>
+
+#include "src/core/ext/filters/client_channel/client_channel.h"
+#include "src/core/lib/gprpp/ref_counted.h"
+#include "src/core/lib/gprpp/ref_counted_ptr.h"
+#include "src/core/lib/iomgr/error.h"
+#include "src/core/lib/json/json.h"
+
+namespace grpc_core {
+namespace channelz {
+
+// owned by the client_channel that it points to and tracks
+class Channel : public RefCounted<Channel> {
+ public:
+  Channel(grpc_channel* channel);
+  ~Channel();
+
+  void CallStarted();
+  void CallFailed() { calls_failed_++; }
+  void CallSucceeded() { calls_succeeded_++; }
+
+  char* RenderJSON();
+
+  void set_channel_destroyed() {
+    GPR_ASSERT(!channel_destroyed_);
+    channel_destroyed_ = true;
+  }
+
+ private:
+  bool channel_destroyed_ = false;
+  grpc_channel* channel_;
+  const char* target_;
+  uint64_t calls_started_ = 0;
+  uint64_t calls_succeeded_ = 0;
+  uint64_t calls_failed_ = 0;
+  gpr_timespec last_call_started_timestamp_;
+  intptr_t channel_uuid_;
+
+  grpc_connectivity_state GetConnectivityState();
+};
+
+}  // namespace channelz
+}  // namespace grpc_core
+
+#endif /* GRPC_CORE_LIB_CHANNEL_CHANNELZ_H */