|
| 1 | +# Motivation Example |
| 2 | + |
| 3 | +## Relation |
| 4 | + |
| 5 | +### Java |
| 6 | + |
| 7 | +``` |
| 8 | +field(id, tid, name, locId) |
| 9 | +method(id, tid, name) |
| 10 | +parent(id1, id2) |
| 11 | +class(id, name) |
| 12 | +interface(id, name) |
| 13 | +type(id, n) |
| 14 | +javaLoc(locId, s, e, path) |
| 15 | +``` |
| 16 | + |
| 17 | +### XML |
| 18 | + |
| 19 | +``` |
| 20 | +xmlEle() |
| 21 | +xmlAttri() |
| 22 | +``` |
| 23 | + |
| 24 | +### JS/TS |
| 25 | + |
| 26 | +``` |
| 27 | +enclose(exprId, methodId) |
| 28 | +callExpr(exprId, methodId, argExprId, callSiteId) |
| 29 | +reference(refId, defId) |
| 30 | +service(id, appId, locId) |
| 31 | +jsLoc(locId, s, e, path) |
| 32 | +app(id, name) |
| 33 | +api(id, apiName, apiSignature, appId) |
| 34 | +functionLikeDeclaration(id, name) |
| 35 | +parent(id1, id2) |
| 36 | +class(id, name) |
| 37 | +``` |
| 38 | + |
| 39 | +## Rule |
| 40 | + |
| 41 | +### Java |
| 42 | + |
| 43 | +``` |
| 44 | +changedField(fid) :- ( |
| 45 | + field(fid, _, _, locId), |
| 46 | + loc(locId, s, e, path), |
| 47 | + changedSet(line, path), |
| 48 | + line >= s, |
| 49 | + line <= e |
| 50 | +). |
| 51 | +fieldInClassType(fName, tName) :- ( |
| 52 | + field(fid, _, fName), |
| 53 | + parent(fid, cid), |
| 54 | + class(cid, tName), |
| 55 | + type(tid, tName) |
| 56 | +). |
| 57 | +
|
| 58 | +fieldInDescendantClassType(fName, tName) :- fieldInClassType(fName, tName). |
| 59 | +fieldInDescendantClassType(fName, tName) :- fieldInClassType(fName, tName1), fieldInDescendantClassType(tName1, tName). |
| 60 | +
|
| 61 | +changedMethodInInterface(fid, mid, iid) :- ( |
| 62 | + changedField(fid), |
| 63 | + field(fid, _, fName, _), |
| 64 | + fieldInDescendantClassType(fName, tName), |
| 65 | + type(tid, tName), |
| 66 | + method(mid, tid, _), |
| 67 | + parent(mid, iid), |
| 68 | + interface(iid, _) |
| 69 | +). |
| 70 | +``` |
| 71 | + |
| 72 | +### Java, XML |
| 73 | + |
| 74 | +参考原论文 |
| 75 | + |
| 76 | +``` |
| 77 | +getChangedTrAPI(trInterfaceName, trMethodName) :- ( |
| 78 | + changedMethodInInterface(fid, mid, iid), |
| 79 | + method(mid, _, trMethodName), |
| 80 | + interface(iid, trInterfaceName), |
| 81 | + service(bid, cid), |
| 82 | + in(iid, cid) |
| 83 | +). |
| 84 | +``` |
| 85 | + |
| 86 | +### JS |
| 87 | + |
| 88 | +``` |
| 89 | +getAppFacade(appName, proxyFacadeName, facadeQualifiedName) :- ( |
| 90 | + service(id, appId, locId), |
| 91 | + jsLoc(locId, _, _, path), |
| 92 | + path = "config/proxy.js", |
| 93 | + app(appId, appName), |
| 94 | + api(_, proxyFacadeName, facadeQualifiedName, appId) |
| 95 | +). |
| 96 | +getInfluencedTrAPI(appName, proxyFacadeName, facadeQualifiedName, trMethodName) :- ( |
| 97 | + getChangedTrAPI(facadeQualifiedName, trMethodName), |
| 98 | + getAppFacade(appName, proxyFacadeName, facadeQualifiedName) |
| 99 | +). |
| 100 | +``` |
| 101 | + |
| 102 | +### TS |
| 103 | + |
| 104 | +``` |
| 105 | +getInfluencedTrAPICall(appName, proxyFacadeName, callExprId) :- ( |
| 106 | + getInfluencedTrAPI(appName, proxyFacadeName, facadeQualifiedName, trMethodName), |
| 107 | + callExpr(callExprId, mid, _, callSiteId), |
| 108 | + reference(callSiteId, defId), |
| 109 | + api(defId, proxyFacadeName, _, _) |
| 110 | +). |
| 111 | +
|
| 112 | +getInfluencedFrontEndAPI(rpcName, trFuncName) :- ( |
| 113 | + getInfluencedTrAPICall(_, _, callExprId), |
| 114 | + enclose(callExprId, methodId), |
| 115 | + functionLikeDeclaration(mid, trFuncName), |
| 116 | + parent(mid, cid), |
| 117 | + class(cid, rpcName) |
| 118 | +). |
| 119 | +``` |
| 120 | + |
| 121 | +## Workflow |
| 122 | + |
| 123 | +1. 根据变更行号,识别出变更内容为新增某一个Field f。 |
| 124 | +2. 通过影响面分析,得出有一个 Interface 的函数 m 的返回类型为包含这个新增字段的类 c。 |
| 125 | +3. 通过结合xml配置分析,这个函数 m 所在的 Interface i 实际为一个对外发布的 rpc 接口。 |
| 126 | +4. 通过分析 bff 应用的配置 proxy.js 文件,发现 该应用 配置了 变更的 rpc 接口。 |
| 127 | +5. 通过分析 bff 应用里所有的 函数调用,发现有使用了 该变更的 rpc 接口,并且 调用函数所在类也是对前端开放的服务接口,由于调用函数的传参与变更后的不一致,导致查询失败,使用该接口的前端服务全部崩溃。 |
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