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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/fastos/fastos.h>
#include <chrono>
#include <vespa/vdstestlib/cppunit/macros.h>
#include <vespa/storage/distributor/bucketgctimecalculator.h>
namespace storage {
namespace distributor {
struct MockBucketIdHasher : public BucketGcTimeCalculator::BucketIdHasher
{
size_t nextGeneratedHash {0};
size_t doHash(const document::BucketId&) const override {
return nextGeneratedHash;
}
};
struct BucketGcTimeCalculatorTest : public CppUnit::TestFixture
{
void noGcIfAlreadyCheckedAfterStartPoint();
void gcIfNotRunInCurrentPeriodAndCheckPeriodPassed();
void noGcIfNotRunInCurrentPeriodAndCheckPeriodNotPassed();
void noGcIfCheckIntervalIsZero();
void identityHasherReturnsBucketId();
BucketGcTimeCalculatorTest();
CPPUNIT_TEST_SUITE(BucketGcTimeCalculatorTest);
CPPUNIT_TEST(noGcIfAlreadyCheckedAfterStartPoint);
CPPUNIT_TEST(gcIfNotRunInCurrentPeriodAndCheckPeriodPassed);
CPPUNIT_TEST(noGcIfNotRunInCurrentPeriodAndCheckPeriodNotPassed);
CPPUNIT_TEST(noGcIfCheckIntervalIsZero);
CPPUNIT_TEST(identityHasherReturnsBucketId);
CPPUNIT_TEST_SUITE_END();
private:
// Ease of reading aliases
using CurrentTime = std::chrono::seconds;
using LastRunAt = std::chrono::seconds;
MockBucketIdHasher hasher;
std::chrono::seconds checkInterval;
BucketGcTimeCalculator calc;
document::BucketId b;
};
BucketGcTimeCalculatorTest::BucketGcTimeCalculatorTest()
: checkInterval(1000),
calc(hasher, checkInterval),
b(16, 1)
{
hasher.nextGeneratedHash = 500;
}
CPPUNIT_TEST_SUITE_REGISTRATION(BucketGcTimeCalculatorTest);
void
BucketGcTimeCalculatorTest::noGcIfAlreadyCheckedAfterStartPoint()
{
// Note: LastRun(0) is considered to be within the current period.
CPPUNIT_ASSERT(!calc.shouldGc(b, CurrentTime(0), LastRunAt(0)));
CPPUNIT_ASSERT(!calc.shouldGc(b, CurrentTime(499), LastRunAt(0)));
CPPUNIT_ASSERT(!calc.shouldGc(b, CurrentTime(999), LastRunAt(500)));
CPPUNIT_ASSERT(!calc.shouldGc(b, CurrentTime(1000), LastRunAt(1000)));
CPPUNIT_ASSERT(!calc.shouldGc(b, CurrentTime(1234), LastRunAt(1100)));
CPPUNIT_ASSERT(!calc.shouldGc(b, CurrentTime(1600), LastRunAt(1500)));
}
void
BucketGcTimeCalculatorTest::gcIfNotRunInCurrentPeriodAndCheckPeriodPassed()
{
CPPUNIT_ASSERT(calc.shouldGc(b, CurrentTime(500), LastRunAt(0)));
CPPUNIT_ASSERT(calc.shouldGc(b, CurrentTime(1600), LastRunAt(500)));
// Note: this may look wrong, but is correct since GC should have been
// scheduled _after_ 1499 so this is most likely the case where a bucket
// has been added to the database at this point in time. Not treating
// this as a valid GC scenario would mean newly added buckets would have to
// wait until the next period to be considered. If the period is long and
// the system is unstable (causing many bucket handoffs), we'd risk not
// being able to scheduled many buckets at all.
CPPUNIT_ASSERT(calc.shouldGc(b, CurrentTime(1600), LastRunAt(1499)));
CPPUNIT_ASSERT(calc.shouldGc(b, CurrentTime(2000), LastRunAt(500)));
CPPUNIT_ASSERT(calc.shouldGc(b, CurrentTime(2600), LastRunAt(1500)));
}
void
BucketGcTimeCalculatorTest::noGcIfNotRunInCurrentPeriodAndCheckPeriodNotPassed()
{
CPPUNIT_ASSERT(!calc.shouldGc(b, CurrentTime(1000), LastRunAt(500)));
}
void
BucketGcTimeCalculatorTest::noGcIfCheckIntervalIsZero()
{
BucketGcTimeCalculator calc2(hasher, std::chrono::seconds(0));
CPPUNIT_ASSERT(!calc2.shouldGc(b, CurrentTime(5000), LastRunAt(0)));
}
void
BucketGcTimeCalculatorTest::identityHasherReturnsBucketId()
{
BucketGcTimeCalculator::BucketIdIdentityHasher hasher2;
document::BucketId bucket(36, 1234);
CPPUNIT_ASSERT_EQUAL(bucket.getId(), hasher2.hash(bucket));
}
} // distributor
} // storage
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