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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vdstestlib/cppunit/macros.h>
#include <vespa/storage/distributor/distributor_host_info_reporter.h>
#include <vespa/storage/distributor/latency_statistics_provider.h>
#include <vespa/storage/distributor/min_replica_provider.h>
#include <vespa/vespalib/data/slime/slime.h>
#include <vespa/vespalib/io/fileutil.h>
#include <vespa/vespalib/testkit/test_kit.h>
#include <tests/common/hostreporter/util.h>
#include <vespa/vespalib/stllike/asciistream.h>
namespace storage {
namespace distributor {
using End = vespalib::JsonStream::End;
using File = vespalib::File;
using Object = vespalib::JsonStream::Object;
class DistributorHostInfoReporterTest : public CppUnit::TestFixture
{
CPPUNIT_TEST_SUITE(DistributorHostInfoReporterTest);
CPPUNIT_TEST(hostInfoWithPutLatenciesOnly);
CPPUNIT_TEST(hostInfoAllInfo);
CPPUNIT_TEST(generateExampleJson);
CPPUNIT_TEST(noReportGeneratedIfDisabled);
CPPUNIT_TEST_SUITE_END();
void hostInfoWithPutLatenciesOnly();
void hostInfoAllInfo();
void verifyReportedNodeLatencies(
const vespalib::Slime& root,
uint16_t node,
int64_t latencySum,
int64_t count);
void generateExampleJson();
void noReportGeneratedIfDisabled();
};
CPPUNIT_TEST_SUITE_REGISTRATION(DistributorHostInfoReporterTest);
using ms = std::chrono::milliseconds;
namespace {
OperationStats
makeOpStats(std::chrono::milliseconds totalLatency, uint64_t numRequests)
{
OperationStats stats;
stats.totalLatency = totalLatency;
stats.numRequests = numRequests;
return stats;
}
// My kingdom for GoogleMock!
struct MockedLatencyStatisticsProvider : LatencyStatisticsProvider
{
NodeStatsSnapshot returnedSnapshot;
NodeStatsSnapshot doGetLatencyStatistics() const override {
return returnedSnapshot;
}
};
struct MockedMinReplicaProvider : MinReplicaProvider
{
std::unordered_map<uint16_t, uint32_t> minReplica;
std::unordered_map<uint16_t, uint32_t> getMinReplica() const override {
return minReplica;
}
};
const vespalib::slime::Inspector&
getNode(const vespalib::Slime& root, uint16_t nodeIndex)
{
auto& storage_nodes = root.get()["distributor"]["storage-nodes"];
const size_t n = storage_nodes.entries();
for (size_t i = 0; i < n; ++i) {
if (storage_nodes[i]["node-index"].asLong() == nodeIndex) {
return storage_nodes[i];
}
}
throw std::runtime_error("No node found with index "
+ std::to_string(nodeIndex));
}
int
getMinReplica(const vespalib::Slime& root, uint16_t nodeIndex)
{
return getNode(root, nodeIndex)["min-current-replication-factor"].asLong();
}
const vespalib::slime::Inspector&
getLatenciesForNode(const vespalib::Slime& root, uint16_t nodeIndex)
{
return getNode(root, nodeIndex)["ops-latency"];
}
} // anon ns
void
DistributorHostInfoReporterTest::verifyReportedNodeLatencies(
const vespalib::Slime& root,
uint16_t node,
int64_t latencySum,
int64_t count)
{
auto& latencies = getLatenciesForNode(root, node);
CPPUNIT_ASSERT_EQUAL(latencySum,
latencies["put"]["latency-ms-sum"].asLong());
CPPUNIT_ASSERT_EQUAL(count, latencies["put"]["count"].asLong());
}
void
DistributorHostInfoReporterTest::hostInfoWithPutLatenciesOnly()
{
MockedLatencyStatisticsProvider latencyStatsProvider;
MockedMinReplicaProvider minReplicaProvider;
DistributorHostInfoReporter reporter(latencyStatsProvider,
minReplicaProvider);
NodeStatsSnapshot snapshot;
snapshot.nodeToStats[0] = { makeOpStats(ms(10000), 3) };
snapshot.nodeToStats[5] = { makeOpStats(ms(25000), 7) };
latencyStatsProvider.returnedSnapshot = snapshot;
vespalib::Slime root;
util::reporterToSlime(reporter, root);
verifyReportedNodeLatencies(root, 0, 10000, 3);
verifyReportedNodeLatencies(root, 5, 25000, 7);
}
void
DistributorHostInfoReporterTest::hostInfoAllInfo()
{
MockedLatencyStatisticsProvider latencyStatsProvider;
MockedMinReplicaProvider minReplicaProvider;
DistributorHostInfoReporter reporter(latencyStatsProvider,
minReplicaProvider);
NodeStatsSnapshot latencySnapshot;
latencySnapshot.nodeToStats[0] = { makeOpStats(ms(10000), 3) };
latencySnapshot.nodeToStats[5] = { makeOpStats(ms(25000), 7) };
latencyStatsProvider.returnedSnapshot = latencySnapshot;
std::unordered_map<uint16_t, uint32_t> minReplica;
minReplica[0] = 2;
minReplica[5] = 9;
minReplicaProvider.minReplica = minReplica;
vespalib::Slime root;
util::reporterToSlime(reporter, root);
verifyReportedNodeLatencies(root, 0, 10000, 3);
verifyReportedNodeLatencies(root, 5, 25000, 7);
CPPUNIT_ASSERT_EQUAL(2, getMinReplica(root, 0));
CPPUNIT_ASSERT_EQUAL(9, getMinReplica(root, 5));
}
void
DistributorHostInfoReporterTest::generateExampleJson()
{
MockedLatencyStatisticsProvider latencyStatsProvider;
MockedMinReplicaProvider minReplicaProvider;
DistributorHostInfoReporter reporter(latencyStatsProvider,
minReplicaProvider);
NodeStatsSnapshot snapshot;
snapshot.nodeToStats[0] = { makeOpStats(ms(10000), 3) };
snapshot.nodeToStats[5] = { makeOpStats(ms(25000), 7) };
latencyStatsProvider.returnedSnapshot = snapshot;
std::unordered_map<uint16_t, uint32_t> minReplica;
minReplica[0] = 2;
minReplica[5] = 9;
minReplicaProvider.minReplica = minReplica;
vespalib::asciistream json;
vespalib::JsonStream stream(json, true);
stream << Object();
reporter.report(stream);
stream << End();
stream.finalize();
std::string jsonString = json.str();
std::string path = TEST_PATH("../../../protocols/getnodestate/distributor.json");
std::string goldenString = File::readAll(path);
vespalib::Memory goldenMemory(goldenString);
vespalib::Slime goldenSlime;
vespalib::slime::JsonFormat::decode(goldenMemory, goldenSlime);
vespalib::Memory jsonMemory(jsonString);
vespalib::Slime jsonSlime;
vespalib::slime::JsonFormat::decode(jsonMemory, jsonSlime);
CPPUNIT_ASSERT_EQUAL(goldenSlime, jsonSlime);
}
void
DistributorHostInfoReporterTest::noReportGeneratedIfDisabled()
{
MockedLatencyStatisticsProvider latencyStatsProvider;
MockedMinReplicaProvider minReplicaProvider;
DistributorHostInfoReporter reporter(latencyStatsProvider,
minReplicaProvider);
reporter.enableReporting(false);
NodeStatsSnapshot snapshot;
snapshot.nodeToStats[0] = { makeOpStats(ms(10000), 3) };
snapshot.nodeToStats[5] = { makeOpStats(ms(25000), 7) };
latencyStatsProvider.returnedSnapshot = snapshot;
vespalib::Slime root;
util::reporterToSlime(reporter, root);
CPPUNIT_ASSERT_EQUAL(size_t(0), root.get().children());
}
} // distributor
} // storage
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