Git仓库：https://github.com/alibaba/QLExpress
1.示例Demo
1.实体构建
2.接口定义
3.脚本编写
表达式内容维护在一个yaml里，默认扫描路径为：classpath*:/rules/**/*.yaml
这里为：user.yaml
2.运行环节
QLExpressRunner如下图所示，从语法树分析、上下文、执行过程三个方面提供二次定制的功能扩展。
首次运算后被即可被缓存
分析出相本中所包含的:
function,委量列表,语法树
结构等等
AST文法匹配
token枥析
token分解
生成指令集合
输入腾本
ApplicationContext
输入上下文
中的springbean
参照:QLExpressContext.jva
解析执行脚
本,返回塔果
是否数字高精腰
自定义function
宏定义
足否还辑短路
nunner
日志级别控制
操作持
自定义method
自定义HeLD
一般为单例模式,一次性初始化
QLExpress脚本引擎详细功能分解
1.获取原始脚本，参数
●QLRule中的value可以使用缺省值，对应yaml的key则为缺省值对应的ruleCode
●存在默认读取文件路径：com.c2f.boot.starter.rule.engine.QLExpressProperties
●String rule为获取的原始脚本，后续基于此构建AST语法树
argNames"joinPointu"
@Around(value-"@annotation(g
(gLRule)
otcggtctpatcotarrmm
M地Od3TGtuRSStotug.t.
方法篷名
METHODMETHODATUREGETMETHODO
method:"oubiComC2Htin
方法
joinpoint.getargsO;
AsDjt12899Rt
objectljargs-joi
露
NEthod.gEtPAarAmeterAntationsO;PArameterAnototions:Annototion[4te1884
Annotationlutl
parameterAnnotations
别名注解
Btyeoatgbdto.tlau..
ugetParameterName(m)
stringl
method:"pubticcom.
PARAMNAMES
规则code,QQLRule注解声明式腿值的
StringruleCode-qlRulevalue
qLRUL"CMR
if
(stringutils.isEmpty(ulcode)
method.getDecLaringcLassO.getName
method.getam;省值方法全路径,方法名
rulecode
规则脾本,默认:resourcerrr*yaml
STingFuLERULECONTEXTGETRULEByCODEULCODE);
if(Stringutils.iEmpty()
thownewC2fOLExPressExcePtiONC"对应规则不存在,LeCode"
ruleCode)
]
/构建表达式运行参数
buiLdContextargsarmnnoationamame
QLExPressContextcontextbui
2.构建后续赋值上下文
●没取别名，默认构建一组：形参：value
●取别名，另构建一组：别名：value（后续yaml能汉化使用也是基于此）
●所以默认构建的上下文数量 = 形参个数 * 1，有别名 = 形参个数 * 2
ROADERMODE
buildcontext(objectotio
args:object[41@28999
parameterAnnotations,stringl
PRivatEQLExpressContext
parameterAi
paramNames
QLExPrEssConteXtSPPLICtOCOTXTEXT
QLEXPRESSConTExtcontext
"orgspringframeworkWco
neW
IT(lArrayutilsiEmpty(ParamNames)
paramNames.Length;1++i:1
FOR(iINTiB;1
stringparamName
paramNames[il;:
PUrtNOmPOUTVRLActtct
objectarg-args[il;
ANNOTAtIoNPARAmeTRANNOTATIoNParAmeTrAnnOTatIONS[I;
stringllaliasarr-nulu;
forAnnotationannotationaamenotation)
if(annotation.anotationtypeqLAiias.cass
aliasarr-(CQLAZias)(annotation)).value;
方
ifCArrayutils.isEmptyCaliasarr))
QLALIASANNOTATIONARECLASSOAOTATIONCOLALIACLASS
(CannotationFnulu)t
if(
aliasarrannotation.valu;
context
中名之
context.put(paramName,ag
oContextQLExpressContext@21058)ize
iF(Arrayutils.isEmptyCalias))
pecttetoooe
FoR(Stringalias:aliasr)
"行计划ooideea
context.put(aliasarg)
3.调用执行
objectresult;
QLRul注解支持的医退护营,款认-
tryt
iF(qLRule.timeoutiiuis>0)
IsTceFALseqLULeimoutMii)
Pesult-expressRumerxcuteuLe
eLset
"@com.c2f.boot.starter.culeenge
isTrace:talse)i
PesultXpessRumer.xecuteuee
QLRuLe:"OcO
catch(ExcEptione)t
C2FQLEXPRESSExCEPTIONC"表达式执行异常ULCODE"+ULCODE
thrownew
CLASSIRETURNTYpemethoD.gETReTurnTYPO;
HAwmm
thrommeCrLapressekeepton达式的返国关与方法返回关不代.LeO"+)
returnresult;
延迟执行
执行一段文本
Params:expressstring-程序文本
context执行上下文
errorList输出的错误信息LiST
isCache-是否使用Cache中的指令集
isTrace-是否输出详细的执行指令信息
timeoutMillis超时毫秒时间
Returns:
THrows:Exception
publicDbjectxcuteStringexpessstringecntext,
context,
Liststringerrorlistbooncaceoce
timeoutMillis)throwsException
/设置超时毫秒时间
QLExpresstimerstimetioMili
tryt
returnlthis.execute(expressstring,contexti
aLog:nulD):
isCache
isTrace
即非延迟执行
HfinalLyf
QLExpressTimer.resetO:
默认第一次执行即缓存
原生属本字持串
组装的上下文
PuticbjectxcUtEStrngeessStn9c
expressstring:"impocom.c
ListstringeoList
isTrace:fals
isCache:true
errorlist:nulz
throwsExceptiont
InstructionSetparseResultnulu;
parseResult:nulz
if(isCache-truefis
isCache:true
parseResuLtexpressInstructioneCache.getexpressstring);
默认第一次执行即镇荐
IFCPARsERESULTNULL)
e)t
synchronizedCexpressInstrctioncc)
DettesmltB@emnct.
if(parseResultnulu)t
梅建AST语法树
parseResuLtthisparseInstructione(expressstring);
expressstring:"importcomca
expressInstructionsetcache.put(expressstring,
parseResult):
方
FeLSet
parseResuLtthis.parseInstructioneexpressstring)
tURNeXECUtEReentRAnTLARSERSULTe
构建AST语法树
基于：com.ql.util.express.parse.KeyWordDefine4Java 构建
选择匹配工厂
pubticbooteanceateInstructionInructi
result:"1n"
StAKFORRLERKCONTLNUOSTKAL
forStack:
size
booLeanisRooT)throwExceptionRootte
NStUCtLOMFAtOYAtYS
getInstructionFactoryodec
NODE:"STATBLOCK:STA
Complesthisesut
booLeanHasLocaLVarACTorYCEATInsTructONCaComie
Shu.meemeittudh.
returnhasLocalVar
boolea
MAven:COM.ALibaba:QLExpress:3.2
(QLEXE
BLOCKINSTUCTIFCToCOmMqLXI)
获取一个表达式需要的外部变量名称列表
Maven:com.auibaba:QLExpress:3.2.6LEx
BreakInstructionfactoromqt
CaLtFUnctionInstructionactooq
Params:express-
MAvEN:cOMALibabA:QLExpress3.2.6Ex
Returns:
MAven:coMAuibaba:QLExpress:3.2.6Ex
CastInstructionactorq
THrows:Exception
Maven:coMauibabaQLExpress3.2.6x
ConstDataInstructioco
publicstringlgetoutvarNames(S
Maven:com.auibaba.QLExpress:3.2.6LEx
ContinueInstructionfactomq
MAveEncoMAuibaba:QLExpress3.2.6x
returnthis.parseinstruction
DefIneInstructionactomqt
Maven:com.auibaba:QLExpress:3.2.6LEx
FIeLDCALLINTrUctIOFACTorYOMqLLXutO)
Maven:com.auibaba:QLExpress:3.2.6Lx
ForInstructionfactorm
Maven:com.auibaba:QLExpress:3.2.6QLEx
FUnctionINstructionFactoom
publicstringu
getoutFunctionNa
MAvEncOMAuibaba:QLExpress:3.2.6Ex
IfInstructionfactorycomqt
createlnstructionSetPrivateo
ExpressRunner
Maven:comauibaba:QLExpress:3.2.6x
InInstructionfactoromq
MedicationwithdrawalSericeTetslidtwha
MavencoMauibaba:QLExpress3.2.6
KeYVaLUeInstructionFactoyom
Console
ger
Maven:com.auibaba:QLExpress:3.2.6Ex
LamdaInstructionfactoromq
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Maven:coMauibaba:QLExpress:3.2.6LEx
Varables
ti.n.oot.mo.fomoc
thisExpressRunner@fou
1o22rm*
View
resultinstructionset@21274)
elnstructionSetpriva
递归解析
分解为Word[]："sum"，”=“，”0“，”;“,"for","(","i",......
Word[]转化为List《ExpressNode》:每一个word变得有意义：常量、变量、符号、分割符号
pubiicclassBLockInstructionFactoryex
extendsInstructionFactoryt
ACompiLeExpressRunner@16922
PUCBSU
result:"Ln"
node,booleanisRoot)
STACKFOrRELBREAKConTInUeForSTackEXpresNodenod
isRoot:tr
forstack:size8
NODE:"STATBLOCK:STATBLOCK
throwsExceptionf
iF(node.isTypeEquaLsorchia"TOLO
srtut.ttommtomtomm
false
ResULt.INStPUctIONCNWINSTRUTICLEDaTaSTACkO.seLInNODEetLINE);
int
tmpPoint:o
ttmpPointresult.getcurrentPoint+
booLeanreturnvalfalsereturnVa:faLse
BOOLEANHAsDEFfaLsEHaffaLse
FOR(ExPRESSNODETmPNODENODEGETCHILdRENO)
TpNODE"STATSEMICOLONSTATSEICOLON
INoDE:"STATBLOCK:STATBLOCK
QCompiLExpressRunner@16822
acompite.atenstuct
result:
booleantmpHasacom
HasDefFHasDeffalse
tmpHas
进归将父节点下面的全部解析
A
if
(HASDEfTU&isRoot
SFALSE
SNODEgETTREETYPEO.EqUALSOCHLPRT"STAT.BLOCK)
esult.nsetnstuctto
omt.mertmw.tm
returnvaLFalse;
FeLSet
解析第一行：请领状态 = 药品请领单.执行状态
PWLCBOLCREtEnStUCtEPe
LZ:执行状态OPNUMBCR
m.....mmu.od
PResHoD
booLeanreturnvalfalsereturnVal:faZse
XPRESSMDDChIN
//处理对象
tmpHas:faLse
acompizeExpressRunner@16922
B9dLcontphes-Btompite.etnct
returnvalreturnvalltmpHas;tmpHas:faLse
/处理属性名称
IFCHTAREntU9
thrownewqLCompiteExceptionC对象名称不是字"chiten)
CHiZdEEXpressNode[21@21662
StrIngFieLdMameStringch
fieLOName:"执行状态"
OPEAtorBaseOpnewOperaTorFieLdCFieLdName);
Op:"FieLdCalZ:执行状态"
intnewInstructiongperatorconaomatNmhi
resuit:Wn1.Lnndatt
result.addInstruction
resuk
ReturnreturnVaLfalse
returnVal:
false
中名力
REUUIMS
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name二null
gLOBENAMEEnULL
torycreatelnstruction0
ldCalllnstructionFactory)
instructionListlnstruction[31@21689)
MedicationwithdrawalServiceTests.alidateWthdrawal
0-lnstructionLoadAttr@21694)Loat请领状态"
SNSOe三盛日美
YCONSOle
er
1lnstuctionLoadAtt@21695)Loadtt:药请领单
2-lnstructionoperator@21696P:FedCl执行状态OPNUMBER
Variables
operator-Operatorrleid@zi6/9Fleidcal枫行状态
三this-FieLdCallnstructionFactory@21650)
OPDatanumber-1
'A:comnil-/EworoscDrnnem160221
解析第二行：执行计划状态 = 执行计划.当前执行状态，clearDataStack后续也会当做一个指令使用
QLEXPRESS-3.2.6a
FIOLdCaLLInstructionFactorY
createlnstruction
Glu
MedicntonWithdriwniSenyioeTestvalldatewthdraw
pafold
DOCTOrORdEREXECUTIEPLEnDTOD
MedicotionwithdrawaServioeimpljava
MedicattonwthdrawalRuleyaml
IExPRessSeniceJava
IExPRESSSeNVICAMELJONA
om
OperatorinstructionFactoryJva
lninstructionFactoryJava
InstructionFactory-Java
ExprssRunner.ava
OLExPRESSTLMeRUaVE
BlocknstructionFactory-Java
ExpressParsejava
lrstructionSetRunnerJava
ThreadLoaalava
OPORSTEDOLECBChOMAans9crJaVa
lmtructionSo.aVa
订W099We97e
wDatabase
名月AR6136
PUBLicBOoLEANCREATEINSc(ExPressRuneraCompiLe
aCompiLExpressRunner016822
o.o
EXPREsSNODENODEBOOLEANSROOT)thOWSEXcEPTiON
NODE:FIELDCALL
isRoot:false
HStrUature
booLeaneTurnvaLfaLsea
ExpressNode[]childrennode.gechidre
EXPREssNodE[21@21836
chiLdren:
事处理对象
b.otntDplasacopie.t
tmpHas:false
QCOmpiLeExpressRunner@16822
returnvalreturnvalltmpHas;tmpHas:faLse
/处理属性名称
IHtdRentu.t
throunetQLcompiteException对名称不是字串常:"+chitdren(1])
罗
食围洲洲
CHiLdn:ExpressNode[21@21836
StringHieLdMeStringchno
fieLOName:"当前执行状态"
peratorBaseophewDperatoFieLdLdNm;da.
33
地,.m
34
returnVal:false
returnreturnvalafalse
resun
母福方罗
instructionListlnstructionl8]@21859)
OLNSTUCInLodt@1694)DA请领态
1LNSTTIOnLOAdAr@21695)LDAtu:药品请领单
FeLdCalllnstructionfactorycreatelnstructiong
2-nstructionoprato@21696PFiedc行状态OPNUMBERL
Debug:
MedicationWithdrawalericeTestsidtwtrw
3-instructionoperator@21860)"P0
OPNUMBERL2)
三4:lnstUcLionCLarDatastack@21861"clearDatastack
面回
Console
三5
"LoadAttr执行计划状态"
五stuctionLondAttr@218621"L
Variablas
三
SEIUOAE
6-LnstructionLoadAt@1863)Loadtt:行计划"
EthisfFieLdCalinstuctionfactory@21650)
7+Nstuconoperto2184PFld当前执行状态OPNUMBER
QACompileExpressRunnerQ160221
TUNctionDetineHashMape21690)SIze-0
createlnstnuction:34Flel
执行计划状态n7LoadAttiView
resulnstructonst@2127态
cachefunctionSetnull
OProblems
QFINDRUNHETODO
.Terminal
PGit
FPMD-IDEASBUNU
CEventLo9
@Profler
TsOSpringPMD
WEndpoints
Debug
foature_mormaldow2021090315065
34/uptdate35:6LFUTF-84spac0s
AutofotchiFnishod(10minutesago)
解析第三行，不再是loadAttr而是LoadData
或需是引包则loadData，变量定义是LoadAttr，未研究
QLEXPRCSS-3.2.6AR
FIeLdCalLnstructionFactory
creueInstuction
Glt:
支
instruction
MedicationWithdravalSeryioeTestvalidtewthaw
pafold
网
MedicotlonwithdrawalServioelmpLVa
DOcTorORdErEXECuTIvEPInDTODass
MedcatonwthdrawaiRule,yaml
lExpressSeniceJava
IEXPRESSSENVICEMFLJOVA
OperstorlnstructionFactoryJVa
lrinstructionFactoryJava
LMstructionFactory-Java
ExpressRunner.java
BlocknstructionFactory-java
QLExPressTimer.lava
ExpressParye.java
FIEIDCalinstructionFactoryjava
OPERAteDAtaCacheManaoorJava
ImstructionSetRunner.iava
ThreadLocaLiava
lmstructionSet.java
WDatabase
订W白UJE7
ULIBOLREtS
9R月61136贸
Fesutt:":t:领态LODA:药领单
InstrctionsetresuL
EXpressNodenode
result
structure
BOOLEANRETURNVaLFa
ExPressNodelJchidre
u山市心324地比
1处理对象
typesman
aCompile:
SiZe二8
booLeantmpHasaComp
name二null
returnval-returnval
gLobeName-null
instructionListilnstruction[13]@22039)
/处理属性名称
ONScInLOadA@21694)LaDA:请领状态
iFCchildren[ilgtode
NTcTiOnLOadA@21695)LdA药领单
2-lnstructionoperator@21696Fied行状态OPNUMBER
thrownewQLCompil
3-Lnstuctionoperator@21860)"OP.OPNUMBER[2]
4+lnstuctionclearDatastack@21861)ckearDatastack
食锡别多粉兴粉河方易
5StuctinLoadAt@2186Loadt行计划状态"
STringFiELONAME
(St
6nstuctonLadA@21863)"LdAt执行计划
7-instuctionopeato218:Fld当执行状态OPNUMBERL
8-instructionoperator@22040)*OP.OPNUMBER[2?
OperaTorBASeOpnew
9-instuctionclearDatastack@22041)clearDatastack"
"FIELD-CALL
三10二
10-instructionLoadAtt@22042)"LoadAtt.已作废状态"
result.addInstruction
三11
H:thoconcomom
returnreturnValfalse
三12
12-nstuctionoperto220CM
INctoNDeIine二H+shMap@21690Size0
cacHEFUNcTIiONSeTEnul
ExPOrtVaRAARRayList@1691)Sze
Fleldcallinstructionfactorycreatelnstructiong
Debug:
MedcationWithdrawalserviceTests.alid
个艺面国
COnsoke
S0祥0A
EthisfFieldCalllnstructionfactory@21650]
QAComplleExpressRunner@16022]
createlnstnuction:34,Flel
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MPMDIDEABUIUWENDPOINTSUSPRINGPMD
牛EwEnTLOG
OProblems
QFINDRUNHTODO
PTerminalGProfiler
PGit
Debug
34/UPtoDae34:1LFUTF84PacesP
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m
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MEdIcattonWIthdrawalSerioelmpLaVe
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MedicatLonWithdrawaiRuleyaml
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lnnstructionfactoryjava
BlocknstructionFactory-Java
ExpressRunner-Jjava
QLExPreSsTin
FIeLdCaLIInstructionFactoryjava
lmtructionFuctory-Jjava
ExpressParsejava
OperateDataCacheManagerjava
LMStuctionSotRunnarFava
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lmstructionSet.java
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624
textsets:"[h:LoadAttr:请2Lod.tt
PrivateOBjEctexecuTEREEntran(Inst
nt(Instructionetsetxrescontextstrnge
ST:NUiSTcEFaLseaLognu
625
tistsstringrrotist
626
try(
627
reentrantCount:1
IntreentrantCountthreadReentrantcount.ge
628
:thERntRAnCOUnTHU
thrEADREentrantcount.set(reentrantcount);
629
Urnreentrantcount1?reentrantcount:1
630
return
H/线程重入
631
InstructtonsetRumer.executeehs
632
sROUmLAaDAtrUL
633
aLog:nulL
isTraceisCatchExccption
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setsthisoaderacontexterrorlist
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634
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Sets::LOdAtt:请领状态2LOADAtt药请领单
635
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istrace
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636
thrEADREENTRAnTCounTSE(THRREntAnTCunT.gETO;
637
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ExpressRunner
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MedicationWithdrawalServiceTestslitr
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Q
QLExPReSS-3.2.6a
lnstructionSetexecutennerOniginstruction
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MEdcationWitharaISEriceTESldteWhrawal
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lnstructIonGoTo-Java
INSTrUctIOnREtURnjava
lnstructionLoadLambda.java
InstuctionNewwirClassjava
lrstructiondperator.java
lnstuctionLoadAtnLava
INStrucTIonGoTOWRhCoNdILioNJava
GLMSTRUCTIONCALISEIIDEFNEFUNCTONAVA
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lnstuctioncalMacro.java
lNstrucTionCIosoNawiArea.Java
GatRuteutdrtm
207
3uWooo
PEDDERMODE
208
returnresult;
289
210
errorlist:nuiz
aLog:nuii
poteycgpeouomtoromttoomm.
WEN14
NULLInstruci态
211
Instructioninstruction-nulu;ins
212
tryt
213
whie(environmen.programPointth.h)
QLEXPREssTimerssrTimeutO;
214
htuct0mthhtutm
215
216
instruction.setLog(alog);/设置L0G
ogaLog:nulZ
instruction:
PFIELDCOLL:行状态OPNUNBERIeRRLSTULZ
217
environmen.RunEnvironmer
instruction.execute(environmen,errorlist)
218
ChooseImplementationofInstnucinexcutnnrmni
219
catch(Exceptionef
cro(com.ql.utiz.expressistruction.detai)
Maven:comlbaba:QLExpress:3.2.6@LExpress-3
InstructioncaliMacro(c
if(printInstructionerror)
220
Maven:comalibaba:qLExpress:3.2.6@LExpress-
InstructioncaLtSeLfofIneFunctionnt
Log.error(:"当前Prograr
221
Maven:conauibaba:qLExpress:3.2.6LExpress
InstructionearDatastackomqt
222
当前指令
Log.error(o
Maven:comauibaba:QLExpress:3.2.6Lxpres
INStrUctionLosNeWAreaomqt
223
Log.errore);
Maven:com.aubaba:QLExpress:3.2.6@LExpress-
Instructionconstpata(omqLti
224
Haven:coMaLibabaQLExpres32x
INstructionGofo(com.qLutiexpeudea)
225
throwei
Haven:coMauibabaqLExpre32x
Instructionorouithcondtionq
226
Haven:comaLibabaQLExpres32xe
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