复现已有算法

2026-07-14 15:43:18 +08:00
parent abebd2a683
commit 50b8111fd9
860 changed files with 182250 additions and 18 deletions
@@ -0,0 +1,80 @@
+#include <drogon/utils/monitoring/Histogram.h>
+using namespace drogon;
+using namespace drogon::monitoring;
+
+void Histogram::observe(double value)
+{
+    std::lock_guard<std::mutex> lock(mutex_);
+    if (maxAge_ > std::chrono::seconds(0) &&
+        timerId_ == trantor::InvalidTimerId)
+    {
+        std::weak_ptr<Histogram> weakPtr =
+            std::dynamic_pointer_cast<Histogram>(shared_from_this());
+        timerId_ = loopPtr_->runEvery(maxAge_ / timeBucketCount_, [weakPtr]() {
+            auto thisPtr = weakPtr.lock();
+            if (!thisPtr)
+                return;
+            thisPtr->rotateTimeBuckets();
+        });
+    }
+    auto &currentBucket = timeBuckets_.back();
+    currentBucket.sum += value;
+    currentBucket.count += 1;
+    for (size_t i = 0; i < bucketBoundaries_.size(); i++)
+    {
+        if (value <= bucketBoundaries_[i])
+        {
+            currentBucket.buckets[i] += 1;
+            break;
+        }
+    }
+    if (value > bucketBoundaries_.back())
+    {
+        currentBucket.buckets.back() += 1;
+    }
+}
+
+std::vector<Sample> Histogram::collect() const
+{
+    std::vector<Sample> samples;
+    std::lock_guard<std::mutex> guard(mutex_);
+    size_t count{0};
+    for (size_t i = 0; i < bucketBoundaries_.size(); i++)
+    {
+        Sample sample;
+        for (auto &bucket : timeBuckets_)
+        {
+            count += bucket.buckets[i];
+        }
+        sample.name = name_ + "_bucket";
+        sample.exLabels.emplace_back("le",
+                                     std::to_string(bucketBoundaries_[i]));
+        sample.value = count;
+        samples.emplace_back(std::move(sample));
+    }
+    Sample sample;
+    for (auto &bucket : timeBuckets_)
+    {
+        count += bucket.buckets.back();
+    }
+    sample.name = name_ + "_bucket";
+    sample.exLabels.emplace_back("le", "+Inf");
+    sample.value = count;
+    samples.emplace_back(std::move(sample));
+    double sum{0};
+    uint64_t totalCount{0};
+    for (auto &bucket : timeBuckets_)
+    {
+        sum += bucket.sum;
+        totalCount += bucket.count;
+    }
+    Sample sumSample;
+    sumSample.name = name_ + "_sum";
+    sumSample.value = sum;
+    samples.emplace_back(std::move(sumSample));
+    Sample countSample;
+    countSample.name = name_ + "_count";
+    countSample.value = totalCount;
+    samples.emplace_back(std::move(countSample));
+    return samples;
+}