mirror of
https://github.com/ciphervance/supercell-wx.git
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343 lines
8.7 KiB
C++
343 lines
8.7 KiB
C++
#include <scwx/provider/aws_level2_data_provider.hpp>
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#include <scwx/util/logger.hpp>
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#include <scwx/util/map.hpp>
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#include <scwx/util/time.hpp>
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#include <scwx/wsr88d/nexrad_file_factory.hpp>
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#include <shared_mutex>
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#include <aws/s3/S3Client.h>
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#include <aws/s3/model/GetObjectRequest.h>
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#include <aws/s3/model/ListObjectsV2Request.h>
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#include <fmt/chrono.h>
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#include <fmt/format.h>
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namespace scwx
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{
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namespace provider
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{
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static const std::string logPrefix_ =
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"scwx::provider::aws_level2_data_provider";
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static const auto logger_ = util::Logger::Create(logPrefix_);
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static const std::string kDefaultBucketName_ = "noaa-nexrad-level2";
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static const std::string kDefaultRegion_ = "us-east-1";
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class AwsLevel2DataProviderImpl
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{
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public:
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struct ObjectRecord
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{
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explicit ObjectRecord(
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const std::string& key,
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std::chrono::system_clock::time_point lastModified) :
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key_ {key}, lastModified_ {lastModified}
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{
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}
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~ObjectRecord() = default;
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std::string key_;
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std::chrono::system_clock::time_point lastModified_;
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};
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explicit AwsLevel2DataProviderImpl(const std::string& radarSite,
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const std::string& bucketName,
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const std::string& region) :
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radarSite_ {radarSite},
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bucketName_ {bucketName},
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region_ {region},
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client_ {nullptr},
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objects_ {},
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objectsMutex_ {},
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lastModified_ {},
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updatePeriod_ {}
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{
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Aws::Client::ClientConfiguration config;
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config.region = region_;
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client_ = std::make_unique<Aws::S3::S3Client>(config);
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}
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~AwsLevel2DataProviderImpl() {}
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void UpdateMetadata();
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std::string radarSite_;
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std::string bucketName_;
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std::string region_;
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std::unique_ptr<Aws::S3::S3Client> client_;
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std::map<std::chrono::system_clock::time_point, ObjectRecord> objects_;
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std::shared_mutex objectsMutex_;
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std::chrono::system_clock::time_point lastModified_;
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std::chrono::seconds updatePeriod_;
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};
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AwsLevel2DataProvider::AwsLevel2DataProvider(const std::string& radarSite) :
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AwsLevel2DataProvider(radarSite, kDefaultBucketName_, kDefaultRegion_)
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{
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}
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AwsLevel2DataProvider::AwsLevel2DataProvider(const std::string& radarSite,
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const std::string& bucketName,
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const std::string& region) :
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p(std::make_unique<AwsLevel2DataProviderImpl>(
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radarSite, bucketName, region))
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{
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}
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AwsLevel2DataProvider::~AwsLevel2DataProvider() = default;
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AwsLevel2DataProvider::AwsLevel2DataProvider(AwsLevel2DataProvider&&) noexcept =
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default;
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AwsLevel2DataProvider&
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AwsLevel2DataProvider::operator=(AwsLevel2DataProvider&&) noexcept = default;
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size_t AwsLevel2DataProvider::cache_size() const
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{
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return p->objects_.size();
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}
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std::chrono::seconds AwsLevel2DataProvider::update_period() const
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{
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return p->updatePeriod_;
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}
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std::chrono::system_clock::time_point
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AwsLevel2DataProvider::last_modified() const
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{
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return p->lastModified_;
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}
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std::string
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AwsLevel2DataProvider::FindKey(std::chrono::system_clock::time_point time)
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{
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logger_->debug("FindKey: {}", util::TimeString(time));
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std::string key {};
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std::shared_lock lock(p->objectsMutex_);
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auto element = util::GetBoundedElement(p->objects_, time);
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if (element.has_value())
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{
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key = element->key_;
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}
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return key;
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}
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std::string AwsLevel2DataProvider::FindLatestKey()
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{
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logger_->debug("FindLatestKey()");
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std::string key {};
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std::shared_lock lock(p->objectsMutex_);
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if (!p->objects_.empty())
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{
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key = p->objects_.crbegin()->second.key_;
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}
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return key;
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}
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std::pair<size_t, size_t>
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AwsLevel2DataProvider::ListObjects(std::chrono::system_clock::time_point date)
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{
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const std::string prefix =
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fmt::format("{0:%Y/%m/%d}/{1}/", fmt::gmtime(date), p->radarSite_);
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logger_->debug("ListObjects: {}", prefix);
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Aws::S3::Model::ListObjectsV2Request request;
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request.SetBucket(p->bucketName_);
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request.SetPrefix(prefix);
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auto outcome = p->client_->ListObjectsV2(request);
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size_t newObjects = 0;
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size_t totalObjects = 0;
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if (outcome.IsSuccess())
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{
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auto& objects = outcome.GetResult().GetContents();
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logger_->debug("Found {} objects", objects.size());
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// Store objects
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std::for_each( //
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objects.cbegin(),
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objects.cend(),
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[&](const Aws::S3::Model::Object& object)
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{
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std::string key = object.GetKey();
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if (!key.ends_with("_MDM"))
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{
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auto time = GetTimePointFromKey(key);
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std::chrono::seconds lastModifiedSeconds {
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object.GetLastModified().Seconds()};
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std::chrono::system_clock::time_point lastModified {
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lastModifiedSeconds};
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std::unique_lock lock(p->objectsMutex_);
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auto [it, inserted] = p->objects_.insert_or_assign(
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time,
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AwsLevel2DataProviderImpl::ObjectRecord {key, lastModified});
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if (inserted)
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{
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newObjects++;
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}
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totalObjects++;
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}
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});
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}
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else
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{
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logger_->warn("Could not list objects: {}",
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outcome.GetError().GetMessage());
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}
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p->UpdateMetadata();
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return std::make_pair(newObjects, totalObjects);
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}
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std::shared_ptr<wsr88d::Ar2vFile>
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AwsLevel2DataProvider::LoadObjectByKey(const std::string& key)
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{
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std::shared_ptr<wsr88d::Ar2vFile> level2File = nullptr;
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Aws::S3::Model::GetObjectRequest request;
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request.SetBucket(p->bucketName_);
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request.SetKey(key);
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auto outcome = p->client_->GetObject(request);
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if (outcome.IsSuccess())
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{
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auto& body = outcome.GetResultWithOwnership().GetBody();
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std::shared_ptr<wsr88d::NexradFile> nexradFile =
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wsr88d::NexradFileFactory::Create(body);
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level2File = std::dynamic_pointer_cast<wsr88d::Ar2vFile>(nexradFile);
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}
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else
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{
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logger_->warn("Could not get object: {}",
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outcome.GetError().GetMessage());
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}
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return level2File;
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}
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size_t AwsLevel2DataProvider::Refresh()
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{
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using namespace std::chrono;
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logger_->debug("Refresh()");
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static std::mutex refreshMutex;
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static system_clock::time_point refreshDate {};
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auto today = floor<days>(system_clock::now());
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auto yesterday = today - days {1};
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std::unique_lock lock(refreshMutex);
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size_t totalNewObjects = 0;
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// If we haven't gotten any objects from today, first list objects for
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// yesterday, to ensure we haven't missed any objects near midnight
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if (refreshDate < today)
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{
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auto [newObjects, totalObjects] = ListObjects(yesterday);
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totalNewObjects = newObjects;
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if (totalObjects > 0)
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{
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refreshDate = yesterday;
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}
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}
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auto [newObjects, totalObjects] = ListObjects(today);
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totalNewObjects += newObjects;
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if (totalObjects > 0)
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{
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refreshDate = today;
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}
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return totalNewObjects;
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}
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void AwsLevel2DataProviderImpl::UpdateMetadata()
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{
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std::shared_lock lock(objectsMutex_);
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if (!objects_.empty())
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{
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lastModified_ = objects_.crbegin()->second.lastModified_;
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}
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if (objects_.size() >= 2)
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{
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auto it = objects_.crbegin();
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auto lastModified = it->second.lastModified_;
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auto prevModified = (++it)->second.lastModified_;
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auto delta = lastModified - prevModified;
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updatePeriod_ = std::chrono::duration_cast<std::chrono::seconds>(delta);
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}
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}
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std::chrono::system_clock::time_point
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AwsLevel2DataProvider::GetTimePointByKey(const std::string& key) const
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{
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return GetTimePointFromKey(key);
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}
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std::chrono::system_clock::time_point
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AwsLevel2DataProvider::GetTimePointFromKey(const std::string& key)
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{
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std::chrono::system_clock::time_point time {};
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const size_t lastSeparator = key.rfind('/');
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const size_t offset =
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(lastSeparator == std::string::npos) ? 0 : lastSeparator + 5;
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// Filename format is GGGGYYYYMMDD_TTTTTT(_V##).gz
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static constexpr size_t formatSize = std::string("YYYYMMDD_TTTTTT").size();
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if (key.size() >= offset + formatSize)
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{
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using namespace std::chrono;
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static const std::string timeFormat {"%Y%m%d_%H%M%S"};
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std::string timeStr {key.substr(offset, formatSize)};
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std::istringstream in {timeStr};
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in >> parse(timeFormat, time);
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if (in.fail())
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{
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logger_->warn("Invalid time: \"{}\"", timeStr);
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}
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}
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else
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{
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logger_->warn("Time not parsable from key: \"{}\"", key);
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}
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return time;
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}
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} // namespace provider
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} // namespace scwx
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