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| // Licensed to the Apache Software Foundation (ASF) 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 | ||
| // | ||
| // 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. | ||
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| #pragma once | ||
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| // Pick up ARROW_WITH_OPENTELEMETRY first | ||
| #include "arrow/util/config.h" | ||
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| #include "arrow/telemetry/util.h" | ||
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| #ifdef ARROW_WITH_OPENTELEMETRY | ||
| #include <opentelemetry/common/attribute_value.h> | ||
| #include <opentelemetry/nostd/shared_ptr.h> | ||
| #include <opentelemetry/nostd/span.h> | ||
| #include <opentelemetry/nostd/string_view.h> | ||
| #endif | ||
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| namespace arrow { | ||
| namespace telemetry { | ||
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| #ifdef ARROW_WITH_OPENTELEMETRY | ||
| using util::span; | ||
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| namespace otel = ::opentelemetry; | ||
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| template <typename T> | ||
| using otel_shared_ptr = otel::nostd::shared_ptr<T>; | ||
| template <typename T> | ||
| using otel_span = otel::nostd::span<T>; | ||
| using otel_string_view = otel::nostd::string_view; | ||
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| inline otel_string_view ToOtel(std::string_view in) { | ||
| return otel_string_view(in.data(), in.length()); | ||
| } | ||
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| /// \brief Converts AttributeValues to their equivalent OTel types (compatible with | ||
| /// std::visit) | ||
| /// | ||
| /// NOTE: This class is stateful and allocates/owns memory when converting string spans, | ||
| /// so one should ensure that the output spans are copied before the converter is reused | ||
| /// or freed. | ||
| struct AttributeConverter { | ||
| using OtelValue = otel::common::AttributeValue; | ||
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| OtelValue operator()(bool v) { return OtelValue(v); } | ||
| OtelValue operator()(int32_t v) { return OtelValue(v); } | ||
| OtelValue operator()(uint32_t v) { return OtelValue(v); } | ||
| OtelValue operator()(int64_t v) { return OtelValue(v); } | ||
| OtelValue operator()(double v) { return OtelValue(v); } | ||
| OtelValue operator()(const char* v) { return OtelValue(otel_string_view(v)); } | ||
| OtelValue operator()(std::string_view v) { return OtelValue(ToOtel(v)); } | ||
| OtelValue operator()(span<const uint8_t> v) { return ToOtelSpan<uint8_t>(v); } | ||
| OtelValue operator()(span<const int32_t> v) { return ToOtelSpan<int32_t>(v); } | ||
| OtelValue operator()(span<const uint32_t> v) { return ToOtelSpan<uint32_t>(v); } | ||
| OtelValue operator()(span<const int64_t> v) { return ToOtelSpan<int64_t>(v); } | ||
| OtelValue operator()(span<const uint64_t> v) { return ToOtelSpan<uint64_t>(v); } | ||
| OtelValue operator()(span<const double> v) { return ToOtelSpan<double>(v); } | ||
| OtelValue operator()(span<const char* const> v) { | ||
| return ToOtelStringSpan<const char*>(v); | ||
| } | ||
| OtelValue operator()(span<const std::string> v) { | ||
| return ToOtelStringSpan<std::string>(v); | ||
| } | ||
| OtelValue operator()(span<const std::string_view> v) { | ||
| return ToOtelStringSpan<std::string_view>(v); | ||
| } | ||
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| private: | ||
| template <typename T, typename U = T> | ||
| OtelValue ToOtelSpan(span<const U> vals) const { | ||
| return otel_span<const T>(vals.begin(), vals.end()); | ||
| } | ||
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| template <typename T> | ||
| OtelValue ToOtelStringSpan(span<const T> vals) { | ||
| const size_t length = vals.size(); | ||
| output_views_.resize(length); | ||
| for (size_t i = 0; i < length; ++i) { | ||
| output_views_[i] = ToOtel(std::string_view(vals[i])); | ||
| } | ||
| return otel_span<const otel_string_view>(output_views_.data(), length); | ||
| } | ||
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| std::vector<otel_string_view> output_views_; | ||
| }; | ||
| #endif | ||
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| } // namespace telemetry | ||
| } // namespace arrow |