public void TestSnapshotTaker()
{
// create some logs...
Add(30);
_engine.HandsOffOutputLog();
Add(20);
TimeSpan period = TimeSpan.FromSeconds(3);
SnapshotTaker taker = new SnapshotTaker(_engine, period);
// Let's wait for a snapshot to be taken
Thread.Sleep(TimeSpan.FromSeconds(5));
AssertEquals(1, _engine.PrevalenceBase.GetFiles("*.snapshot").Length);
// more log files...
Add(20);
// a second snapshot...
Thread.Sleep(TimeSpan.FromSeconds(2));
// ok, we're done.
taker.Dispose();
// Let's make sure no more snapshots will be
// taken...
Thread.Sleep(period + TimeSpan.FromSeconds(1));
AssertEquals(2, _engine.PrevalenceBase.GetFiles("*.snapshot").Length);
// sanity check
CrashRecover();
AssertTotal(70);
}
public void TestCleanUpAllFilesPolicy()
{
// some log files...
Add(20); // 1st log file
CrashRecover();
Add(30); // 2nd log file
_engine.TakeSnapshot(); // 1st snapshot
Add(10); // 3rd log file
_engine.TakeSnapshot(); // 2nd snapshot
Add(20); // 4rd log file
FileInfo[] files = CleanUpAllFilesPolicy.Default.SelectFiles(_engine);
AssertEquals(4, files.Length);
AssertEquals(FormatCommandLogName(1), files[0].Name);
AssertEquals(FormatCommandLogName(2), files[1].Name);
AssertEquals(FormatSnapshotName(2), files[2].Name);
AssertEquals(FormatCommandLogName(3), files[3].Name);
SnapshotTaker taker = new SnapshotTaker(_engine, TimeSpan.FromMilliseconds(200), CleanUpAllFilesPolicy.Default);
Thread.Sleep(300);
taker.Dispose();
// sanity check
CrashRecover();
AssertTotal(80);
}
public void TestCleanUpOldFilesPolicy()
{
// some log files...
Add(20); // 1st log file - 0001.commandlog
CrashRecover();
Add(30); // 2nd log file - 0002.commandlog
_engine.TakeSnapshot(); // 1st snapshot - 0002.snapshot
Thread.Sleep(TimeSpan.FromMilliseconds(2500));
Add(10); // 3rd log file - 0003.commandlog
// remove files older than 2 seconds...
ICleanUpPolicy policy = new OldFilesCleanUpPolicy(TimeSpan.FromSeconds(2));
SnapshotTaker taker = new SnapshotTaker(_engine, TimeSpan.FromMilliseconds(250), policy);
Thread.Sleep(TimeSpan.FromMilliseconds(400));
// 2nd snasphot taken - 0003.snapshot
taker.Dispose();
FileInfo[] files = _engine.PrevalenceBase.GetFiles("*.*");
Array.Sort(files, FileNameComparer.Default);
AssertEquals(2, files.Length);
AssertEquals("3rd command log", FormatCommandLogName(3), files[0].Name);
AssertEquals("2nd snapshot", FormatSnapshotName(3), files[1].Name);
// sanity check
CrashRecover();
AssertTotal(60);
}
private void CreateSnapshotTaker(PrevalenceEngine engine, float snapshotPeriod)
{
TimeSpan period = TimeSpan.FromHours(snapshotPeriod);
ICleanUpPolicy policy = (ICleanUpPolicy)Kernel[PrevalenceFacility.CleanupPolicyComponentPropertyKey];
SnapshotTaker taker = new SnapshotTaker(engine, period, policy);
Kernel.AddComponentInstance(PrevalenceFacility.SnapShotTakerComponentPropertyKey, taker);
}
private void SetupEngine()
{
engine = PrevalenceActivator.CreateTransparentEngine(typeof(CacheSystem), dataDir);
system = engine.PrevalentSystem as CacheSystem;
taker = new SnapshotTaker(engine, TimeSpan.FromMinutes(5), CleanUpAllFilesPolicy.Default);
}
