lxm_library_java/SnowFlake-IdGenerator
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优化回拨处理逻辑

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This commit is contained in:
zhouzj
2021-03-14 21:35:23 +08:00
parent 6ae25ac33a
commit 3f368a1e88
3 changed files with 100 additions and 51 deletions
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65
Java/source/src/main/java/com/yitter/core/SnowWorkerM1.java
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@@ -52,6 +52,8 @@ public class SnowWorkerM1 implements ISnowWorker {
protected short _CurrentSeqNumber;
protected long _LastTimeTick = -1L;
protected long _TurnBackTimeTick = -1L;
protected byte _TurnBackIndex = 0;
protected boolean _IsOverCost = false;
protected int _OverCostCountInOneTerm = 0;
protected int _GenCountInOneTerm = 0;
@@ -73,7 +75,7 @@ public class SnowWorkerM1 implements ISnowWorker {
}
private void BeginOverCostCallBack(long useTimeTick) {
private void BeginOverCostAction(long useTimeTick) {
// if (GenAction == null) {
// return;
// }
@@ -87,7 +89,7 @@ public class SnowWorkerM1 implements ISnowWorker {
// _TermIndex));
}
private void EndOverCostCallBack(long useTimeTick) {
private void EndOverCostAction(long useTimeTick) {
if (_TermIndex > 10000) {
_TermIndex = 0;
}
@@ -105,7 +107,7 @@ public class SnowWorkerM1 implements ISnowWorker {
// _TermIndex));
}
private void TurnBackCallBack(long useTimeTick) {
private void BeginTurnBackAction(long useTimeTick) {
// if (GenAction == null) {
// return;
// }
@@ -119,11 +121,15 @@ public class SnowWorkerM1 implements ISnowWorker {
// _TermIndex));
}
private void EndTurnBackAction(long useTimeTick) {
}
private long NextOverCostId() {
long currentTimeTick = GetCurrentTimeTick();
if (currentTimeTick > _LastTimeTick) {
EndOverCostCallBack(currentTimeTick);
EndOverCostAction(currentTimeTick);
_LastTimeTick = currentTimeTick;
_CurrentSeqNumber = MinSeqNumber;
@@ -135,7 +141,7 @@ public class SnowWorkerM1 implements ISnowWorker {
}
if (_OverCostCountInOneTerm >= TopOverCostCount) {
EndOverCostCallBack(currentTimeTick);
EndOverCostAction(currentTimeTick);
_LastTimeTick = GetNextTimeTick();
_CurrentSeqNumber = MinSeqNumber;
@@ -163,6 +169,33 @@ public class SnowWorkerM1 implements ISnowWorker {
private long NextNormalId() throws IdGeneratorException {
long currentTimeTick = GetCurrentTimeTick();
if (currentTimeTick < _LastTimeTick) {
if (_TurnBackTimeTick < 1) {
_TurnBackTimeTick = _LastTimeTick - 1;
_TurnBackIndex++;
// 每毫秒序列数的前5位是预留位，0用于手工新值，1-4是时间回拨次序
// 最多4次回拨（防止回拨重叠）
if (_TurnBackIndex > 4) {
_TurnBackIndex = 1;
}
BeginTurnBackAction(_TurnBackTimeTick);
}
try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
return CalcTurnBackId(_TurnBackTimeTick);
}
// 时间追平时，_TurnBackTimeTick清零
if (_TurnBackTimeTick > 0) {
EndTurnBackAction(_TurnBackTimeTick);
_TurnBackTimeTick = 0;
}
if (currentTimeTick > _LastTimeTick) {
_LastTimeTick = currentTimeTick;
_CurrentSeqNumber = MinSeqNumber;
@@ -171,34 +204,18 @@ public class SnowWorkerM1 implements ISnowWorker {
}
if (_CurrentSeqNumber > MaxSeqNumber) {
BeginOverCostCallBack(currentTimeTick);
BeginOverCostAction(currentTimeTick);
_TermIndex++;
_LastTimeTick++;
_CurrentSeqNumber = MinSeqNumber;
_IsOverCost = true;
_OverCostCountInOneTerm++;
_OverCostCountInOneTerm = 1;
_GenCountInOneTerm = 1;
return CalcId(_LastTimeTick);
}
if (currentTimeTick < _LastTimeTick) {
if (_TurnBackTimeTick < 1) {
_TurnBackTimeTick = _LastTimeTick - 1;
}
try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
TurnBackCallBack(_TurnBackTimeTick);
return CalcTurnBackId(_TurnBackTimeTick);
}
return CalcId(_LastTimeTick);
}
@@ -213,7 +230,7 @@ public class SnowWorkerM1 implements ISnowWorker {
private long CalcTurnBackId(long useTimeTick) {
long result = ((useTimeTick << _TimestampShift) +
((long) WorkerId << SeqBitLength) + 0);
((long) WorkerId << SeqBitLength) + _TurnBackIndex);
_TurnBackTimeTick--;
return result;