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1 | cpss.zip\cpss\src\main\java\gov\va\cpss\job | CbssBaseRetryTasklet.java | Wed Feb 1 21:07:26 2017 UTC |
2 | cpss.zip\cpss\src\main\java\gov\va\cpss\job | CbssBaseRetryTasklet.java | Fri Feb 3 20:50:17 2017 UTC |
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1 | package go v.va.cpss. job; | |
2 | ||
3 | import sta tic gov.va .cpss.job. CbssJobPro cessingCon stants.JOB _FAILURE_K EY; | |
4 | import sta tic gov.va .cpss.job. CbssJobPro cessingCon stants.JOB _FAILURE_M ESSAGE_KEY ; | |
5 | ||
6 | import org .apache.lo g4j.Logger ; | |
7 | import org .springfra mework.bat ch.core.Ex itStatus; | |
8 | import org .springfra mework.bat ch.core.St epContribu tion; | |
9 | import org .springfra mework.bat ch.core.St epExecutio n; | |
10 | import org .springfra mework.bat ch.core.St epExecutio nListener; | |
11 | import org .springfra mework.bat ch.core.sc ope.contex t.ChunkCon text; | |
12 | import org .springfra mework.bat ch.core.st ep.item.Ba tchRetryTe mplate; | |
13 | import org .springfra mework.bat ch.core.st ep.tasklet .Tasklet; | |
14 | import org .springfra mework.bat ch.repeat. RepeatStat us; | |
15 | import org .springfra mework.ret ry.Recover yCallback; | |
16 | import org .springfra mework.ret ry.RetryCa llback; | |
17 | import org .springfra mework.ret ry.RetryCo ntext; | |
18 | import org .springfra mework.ret ry.RetryEx ception; | |
19 | ||
20 | /** | |
21 | * Abstrac t base cla ss that im plements l ogic for a tasklet t o retry ex ecution. | |
22 | * | |
23 | * @author D N S | |
24 | */ | |
25 | public abs tract clas s CbssBase RetryTaskl et impleme nts Taskle t, StepExe cutionList ener { | |
26 | ||
27 | pr ivate stat ic final S tring RETR Y_FAILURE_ STATUS = " RETRY ATTE MPTS EXHAU STED"; | |
28 | pr ivate stat ic final S tring RETR Y_FAILURE_ MESSAGE = "Processin g could no t continue due to re try constr aints"; | |
29 | ||
30 | pr otected fi nal Logger taskletLo gger; | |
31 | ||
32 | /* | |
33 | * This flag is used t o indicate if the pr ocessing w as success ful and no | |
34 | * longer ne eds to ret ry. | |
35 | * / | |
36 | pr ivate bool ean succes sful = fal se; | |
37 | ||
38 | /* | |
39 | * The retry template that has t he retry a nd backoff policy co nfiguratio ns. | |
40 | * / | |
41 | pr ivate Batc hRetryTemp late batch RetryTempl ate; | |
42 | ||
43 | pu blic CbssB aseRetryTa sklet() { | |
44 | task letLogger = Logger.g etLogger(t his.getCla ss().getCa nonicalNam e()); | |
45 | } | |
46 | ||
47 | pu blic Batch RetryTempl ate getBat chRetryTem plate() { | |
48 | retu rn batchRe tryTemplat e; | |
49 | } | |
50 | ||
51 | pu blic void setBatchRe tryTemplat e(BatchRet ryTemplate batchRetr yTemplate) { | |
52 | this .batchRetr yTemplate = batchRet ryTemplate ; | |
53 | } | |
54 | ||
55 | @O verride | |
56 | pu blic Repea tStatus ex ecute(Step Contributi on contrib ution, Chu nkContext chunkConte xt) throws Exception { | |
57 | ||
58 | retu rn batchRe tryTemplat e.execute( new RetryC allback<Re peatStatus , RetryExc eption>() { | |
59 | ||
60 | public RepeatSta tus doWith Retry(Retr yContext c ontext) th rows Retry Exception { | |
61 | ||
62 | // Call custom log ic impleme nted by su bclass. | |
63 | if (exec uteLogic() ) { | |
64 | successful = true; | |
65 | return Rep eatStatus. FINISHED; | |
66 | } | |
67 | ||
68 | taskletL ogger.warn ("Tasklet could not continue, attempting retry..." ); | |
69 | throw ne w RetryExc eption("Ta sklet coul d not cont inue, atte mpting ret ry..."); | |
70 | } | |
71 | ||
72 | }, n ew Recover yCallback< RepeatStat us>() { | |
73 | ||
74 | @Overr ide | |
75 | public RepeatSta tus recove r(RetryCon text conte xt) throws Exception { | |
76 | ||
77 | taskletL ogger.erro r("Tasklet could not start and exhausted all retry attempts" ); | |
78 | return R epeatStatu s.FINISHED ; | |
79 | } | |
80 | ||
81 | }); | |
82 | } | |
83 | ||
84 | @O verride | |
85 | pu blic void beforeStep (StepExecu tion stepE xecution) { | |
86 | // I nitialize. | |
87 | succ essful = f alse; | |
88 | } | |
89 | ||
90 | @O verride | |
91 | pu blic ExitS tatus afte rStep(Step Execution stepExecut ion) { | |
92 | ||
93 | if ( successful ) { | |
94 | return ExitStatu s.COMPLETE D; | |
95 | } | |
96 | ||
97 | step Execution. getJobExec ution().ge tExecution Context(). putString( JOB_FAILUR E_KEY, RET RY_FAILURE _STATUS); | |
98 | step Execution. getJobExec ution().ge tExecution Context(). putString( JOB_FAILUR E_MESSAGE_ KEY, RETRY _FAILURE_M ESSAGE); | |
99 | retu rn ExitSta tus.FAILED ; | |
100 | } | |
101 | ||
102 | /* * | |
103 | * Custom lo gic provid ed by impl ementing c lass to re turn true of tasklet | |
104 | * completed successfu lly and no longer ne eds to att empt retry . | |
105 | * | |
106 | * @return B oolean fla g indicati ng if the logic was executed s uccessfull y. | |
107 | * / | |
108 | ab stract pro tected boo lean execu teLogic(); | |
109 | ||
110 | } |
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