feat: add client telemetry support

src/impl/ClientRequestContext.cpp

@@ -0,0 +1,70 @@
+// Licensed to the LF AI & Data foundation under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The ASF licenses this file
+// to you 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
+
+#include "milvus/ClientRequestContext.h"
+
+#include <algorithm>
+#include <iomanip>
+#include <random>
+#include <sstream>
+
+namespace milvus {
+namespace {
+thread_local std::string request_id;
+}
+
+void
+ClientRequestContext::Set(const std::string& value) {
+    request_id = value;
+}
+
+const std::string&
+ClientRequestContext::Get() {
+    return request_id;
+}
+
+void
+ClientRequestContext::Clear() {
+    request_id.clear();
+}
+
+std::string
+ClientRequestContext::NewRequestId() {
+    std::random_device device;
+    std::mt19937_64 generator(device());
+    std::uniform_int_distribution<uint64_t> distribution;
+    uint64_t high = 0;
+    uint64_t low = 0;
+    do {
+        high = distribution(generator);
+        low = distribution(generator);
+    } while (high == 0 && low == 0);
+    std::ostringstream stream;
+    stream << std::hex << std::setfill('0') << std::setw(16) << high << std::setw(16) << low;
+    return stream.str();
+}
+
+bool
+ClientRequestContext::IsValid(const std::string& value) {
+    return value.size() == 32 && value != std::string(32, '0') &&
+           std::all_of(value.begin(), value.end(), [](char character) {
+               return (character >= '0' && character <= '9') || (character >= 'a' && character <= 'f');
+           });
+}
+
+ScopedClientRequestId::ScopedClientRequestId(const std::string& value) : previous_(ClientRequestContext::Get()) {
+    ClientRequestContext::Set(value);
+}
+
+ScopedClientRequestId::~ScopedClientRequestId() {
+    ClientRequestContext::Set(previous_);
+}
+
+}  // namespace milvus