Alachisoft.NCache.Common.Stats.GarbageCollectionTask Maven / Gradle / Ivy

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package Alachisoft.NCache.Common.Stats;

public final class GarbageCollectionTask {
//implements TimeScheduler.Task {
//	private static final int _maxFilureCount = 5;
//	private static final int _minCollectionInterval = 5; ///5 seconds
//
//	/** Interval after which the task will be executed agian        
//	*/
//	private int _executionInterval = 20000; //20 seconds
//
//	/** Total memory available (in bytes)
//	*/
////C# TO JAVA CONVERTER WARNING: Unsigned integer types have no direct equivalent in Java:
////ORIGINAL LINE: private ulong _totalMemory = 0;
//	private long _totalMemory = 0;
//
//	/** Usage threshold, after which GC will be invoked
//	*/
//	private int _collectionThreshold;
//
//	/** Cancel the task
//	*/
//	private boolean _cancel = false;
//
//	/** Number of times the execution of task failed
//	*/
//	private short _failureCount = 0;
//
//	public GarbageCollectionTask(int collectionThreshold) {
//		this._collectionThreshold = collectionThreshold;
//
//		String intervalSettings = ConfigurationSettings.AppSettings["NCacheServer.ForcedGCInterval"];
//		if (!tangible.DotNetToJavaStringHelper.isNullOrEmpty(intervalSettings)) {
//			tangible.RefObject tempRef__executionInterval = new tangible.RefObject(this._executionInterval);
//			Integer.pa(intervalSettings, tempRef__executionInterval);
//			this._executionInterval = tempRef__executionInterval.argvalue;
//			if (this._executionInterval < _minCollectionInterval) {
//				this._executionInterval = _minCollectionInterval;
//			}
//			this._executionInterval *= 1000; ///Convert to milliseconds
//		}
//	}
//
////C# TO JAVA CONVERTER TODO TASK: There is no preprocessor in Java:
//		///#region Task Members
//
//	public boolean IsCancelled() {
//		return this._cancel;
//	}
//
//	public long GetNextInterval() {
//		return _executionInterval;
//	}
//
//	public void Run() {
//		if (this._totalMemory <= 0) {
//			this._totalMemory = this.GetSystemMemory();
//			if (this._totalMemory <= 0) {
//				return;
//			}
//		}
//
//		/**[Ata]This call take some time to complete. 
//		Benchmark @Quad core, 8GB RAM, 1,000,000 iterations
//		Best(ms): 0.2366, Avg(ms): 0.3188, Worst(ms): 23.6123
//		*/
////C# TO JAVA CONVERTER WARNING: Unsigned integer types have no direct equivalent in Java:
////ORIGINAL LINE: ulong processUsage = (ulong)Process.GetCurrentProcess().PrivateMemorySize64;
//		long processUsage = (long)Process.GetCurrentProcess().PrivateMemorySize64;
//
//		float usage = ((float)processUsage / this._totalMemory) * 100;
//
//		if (usage >= this._collectionThreshold) {
//			GC.Collect(GC.MaxGeneration, GCCollectionMode.Forced);
//		}
//	}
//
////C# TO JAVA CONVERTER TODO TASK: There is no preprocessor in Java:
//		///#endregion
//
//	/** 
//	 Get system's total memory
//	 
//	 @return System's total memory
//	*/
//	private long GetSystemMemory() {
//		/**Retrieve system memory information
//		*/
//		MemoryStatus.MemoryStatusEx status = new MemoryStatus.MemoryStatusEx();
//		try {
//			/**This call is quiet effiecient. Also, it is called only once if we
//			 successfully retrieve system memory information (otherwise we will retry
//			 every time the task is invoked until we reach the failure count)
//			Benchmark @Quad core, 8GB RAM, 1,000,000 iterations
//			Best(ms): 0.003821, Avg(ms): 0.004136, Worst(ms): 0.5701
//			*/
//			status = MemoryStatus.GetMemoryStatus();
//
//			/**Unable to retrieve system memory status
//			*/
//			if (status.TotalMemory <= 0) {
//				//this._context.CacheTrace.error("Cache.StartGCTask",
//				//    "Failed to retrieve memory status. Garbage collection task will not start");
//				this._failureCount++;
//
//				return 0;
//			}
//
//			return status.TotalMemory;
//		} catch (RuntimeException exc) {
//			//this._context.CacheTrace.error("Cache.StartGCTask",
//			//    string.Format("An exception occurred while retrieving system memory information. Exception: {0}",
//			//    exc.ToString()));
//			this._failureCount++;
//
//			return 0;
//		} finally {
//
//			if (this._failureCount >= _maxFilureCount) {
//				AppUtil.LogEvent("NCache", "Failed to retrieve memory status. Garbage collection task will now exit", EventLogEntryType.Error, EventCategories.Error, EventID.GeneralError);
//
//				this._cancel = true;
//			}
//		}
//	}
}