40ecdeb0b6
* Under the hood, SQLite creates surrogate keys (ROWID) anyway. We may as well take advantage of this and use the surrogates for foreign keys as well, since they are simpler and more efficient than compound foreign keys. * Create indexes for efficient eviction queries
77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
#include <mbgl/util/run_loop.hpp>
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#include <mbgl/util/string.hpp>
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#include <mbgl/util/io.hpp>
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#include <mbgl/storage/default_file_source.hpp>
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#include <cstdlib>
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#include <iostream>
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using namespace std::literals::chrono_literals;
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int main(int, char * []) {
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using namespace mbgl;
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unlink("offline.db");
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util::RunLoop loop;
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DefaultFileSource fileSource("offline.db", ".");
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fileSource.setAccessToken(getenv("MAPBOX_ACCESS_TOKEN"));
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LatLngBounds bayArea = LatLngBounds::hull(LatLng(37.2, -122.8), LatLng(38.1, -121.7));
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OfflineTilePyramidRegionDefinition definition("mapbox://styles/mapbox/streets-v8", bayArea, 0, 15, 1.0);
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OfflineRegionMetadata metadata;
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class Observer : public OfflineRegionObserver {
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public:
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Observer(util::RunLoop& loop_)
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: loop(loop_),
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start(SystemClock::now()) {
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}
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void statusChanged(OfflineRegionStatus status) override {
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std::string bytesPerSecond = "-";
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auto elapsedSeconds = (SystemClock::now() - start) / 1s;
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if (elapsedSeconds != 0) {
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bytesPerSecond = util::toString(status.completedResourceSize / elapsedSeconds);
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}
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std::cout << status.completedResourceCount << " / " << status.requiredResourceCount
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<< " resources"
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<< (status.requiredResourceCountIsIndeterminate ? " (indeterminate); " : "; ")
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<< status.completedResourceSize << " bytes downloaded"
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<< " (" << bytesPerSecond << " bytes/sec)"
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<< std::endl;
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if (status.complete()) {
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std::cout << "Finished" << std::endl;
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loop.stop();
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}
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}
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void responseError(Response::Error error) override {
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std::cerr << error.reason << " downloading resource: " << error.message << std::endl;
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}
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util::RunLoop& loop;
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SystemTimePoint start;
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};
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fileSource.createOfflineRegion(definition, metadata, [&] (std::exception_ptr error, optional<OfflineRegion> region) {
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if (error) {
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std::cerr << "Error creating region: " << util::toString(error) << std::endl;
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loop.stop();
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exit(1);
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} else {
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assert(region);
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fileSource.setOfflineRegionObserver(*region, std::make_unique<Observer>(loop));
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fileSource.setOfflineRegionDownloadState(*region, OfflineRegionDownloadState::Active);
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}
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});
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loop.run();
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return 0;
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}
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