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Install",[663,664,665,690,704,718],"code-group",{},[666,667,673],"pre",{"className":668,"code":669,"filename":670,"language":671,"meta":672,"style":672},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","pnpm add evlog\n","pnpm","bash","",[549,674,675],{"__ignoreMap":672},[676,677,680,683,687],"span",{"class":678,"line":679},"line",1,[676,681,670],{"class":682},"sBMFI",[676,684,686],{"class":685},"sfazB"," add",[676,688,689],{"class":685}," evlog\n",[666,691,694],{"className":668,"code":692,"filename":693,"language":671,"meta":672,"style":672},"bun add evlog\n","bun",[549,695,696],{"__ignoreMap":672},[676,697,698,700,702],{"class":678,"line":679},[676,699,693],{"class":682},[676,701,686],{"class":685},[676,703,689],{"class":685},[666,705,708],{"className":668,"code":706,"filename":707,"language":671,"meta":672,"style":672},"yarn add evlog\n","yarn",[549,709,710],{"__ignoreMap":672},[676,711,712,714,716],{"class":678,"line":679},[676,713,707],{"class":682},[676,715,686],{"class":685},[676,717,689],{"class":685},[666,719,722],{"className":668,"code":720,"filename":721,"language":671,"meta":672,"style":672},"npm install evlog\n","npm",[549,723,724],{"__ignoreMap":672},[676,725,726,728,731],{"class":678,"line":679},[676,727,721],{"class":682},[676,729,730],{"class":685}," install",[676,732,689],{"class":685},[658,734,736],{"id":735},"_2-initialize-once-log-per-invocation","2. Initialize once, log per invocation",[666,738,743],{"className":739,"code":740,"filename":741,"language":742,"meta":672,"style":672},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import type { SQSEvent } from 'aws-lambda'\nimport { initLogger, createLogger } from 'evlog'\n\ninitLogger({\n  env: { service: 'sqs-consumer', environment: process.env.NODE_ENV },\n})\n\nexport async function handler(event: SQSEvent) {\n  for (const record of event.Records) {\n    const log = createLogger({\n      messageId: record.messageId,\n      approximateReceiveCount: record.attributes?.ApproximateReceiveCount,\n    })\n\n    try {\n      log.set({ queue: { name: record.eventSourceARN } })\n      \u002F\u002F … parse record.body and process the message\n      log.set({ status: 'ok' })\n    } catch (error) {\n      log.error(error instanceof Error ? error : new Error(String(error)))\n      log.set({ status: 'error' })\n      throw error\n    } finally {\n      log.emit()\n    }\n  }\n}\n","src\u002Fhandler.ts","typescript",[549,744,745,777,804,811,824,873,882,887,919,950,968,986,1009,1017,1022,1030,1071,1078,1107,1124,1169,1196,1205,1215,1228,1234,1240],{"__ignoreMap":672},[676,746,747,751,754,758,762,765,768,771,774],{"class":678,"line":679},[676,748,750],{"class":749},"s7zQu","import",[676,752,753],{"class":749}," type",[676,755,757],{"class":756},"sMK4o"," {",[676,759,761],{"class":760},"sTEyZ"," SQSEvent",[676,763,764],{"class":756}," }",[676,766,767],{"class":749}," from",[676,769,770],{"class":756}," '",[676,772,773],{"class":685},"aws-lambda",[676,775,776],{"class":756},"'\n",[676,778,780,782,784,787,790,793,795,797,799,802],{"class":678,"line":779},2,[676,781,750],{"class":749},[676,783,757],{"class":756},[676,785,786],{"class":760}," initLogger",[676,788,789],{"class":756},",",[676,791,792],{"class":760}," createLogger",[676,794,764],{"class":756},[676,796,767],{"class":749},[676,798,770],{"class":756},[676,800,801],{"class":685},"evlog",[676,803,776],{"class":756},[676,805,807],{"class":678,"line":806},3,[676,808,810],{"emptyLinePlaceholder":809},true,"\n",[676,812,814,818,821],{"class":678,"line":813},4,[676,815,817],{"class":816},"s2Zo4","initLogger",[676,819,820],{"class":760},"(",[676,822,823],{"class":756},"{\n",[676,825,827,831,834,836,839,841,843,846,849,851,854,856,859,862,865,867,870],{"class":678,"line":826},5,[676,828,830],{"class":829},"swJcz","  env",[676,832,833],{"class":756},":",[676,835,757],{"class":756},[676,837,838],{"class":829}," service",[676,840,833],{"class":756},[676,842,770],{"class":756},[676,844,845],{"class":685},"sqs-consumer",[676,847,848],{"class":756},"'",[676,850,789],{"class":756},[676,852,853],{"class":829}," environment",[676,855,833],{"class":756},[676,857,858],{"class":760}," process",[676,860,861],{"class":756},".",[676,863,864],{"class":760},"env",[676,866,861],{"class":756},[676,868,869],{"class":760},"NODE_ENV ",[676,871,872],{"class":756},"},\n",[676,874,876,879],{"class":678,"line":875},6,[676,877,878],{"class":756},"}",[676,880,881],{"class":760},")\n",[676,883,885],{"class":678,"line":884},7,[676,886,810],{"emptyLinePlaceholder":809},[676,888,890,893,897,900,903,905,909,911,913,916],{"class":678,"line":889},8,[676,891,892],{"class":749},"export",[676,894,896],{"class":895},"spNyl"," async",[676,898,899],{"class":895}," function",[676,901,902],{"class":816}," handler",[676,904,820],{"class":756},[676,906,908],{"class":907},"sHdIc","event",[676,910,833],{"class":756},[676,912,761],{"class":682},[676,914,915],{"class":756},")",[676,917,918],{"class":756}," {\n",[676,920,922,925,928,931,934,937,940,942,945,948],{"class":678,"line":921},9,[676,923,924],{"class":749},"  for",[676,926,927],{"class":829}," (",[676,929,930],{"class":895},"const",[676,932,933],{"class":760}," record",[676,935,936],{"class":756}," of",[676,938,939],{"class":760}," event",[676,941,861],{"class":756},[676,943,944],{"class":760},"Records",[676,946,947],{"class":829},") ",[676,949,823],{"class":756},[676,951,953,956,959,962,964,966],{"class":678,"line":952},10,[676,954,955],{"class":895},"    const",[676,957,958],{"class":760}," log",[676,960,961],{"class":756}," =",[676,963,792],{"class":816},[676,965,820],{"class":829},[676,967,823],{"class":756},[676,969,971,974,976,978,980,983],{"class":678,"line":970},11,[676,972,973],{"class":829},"      messageId",[676,975,833],{"class":756},[676,977,933],{"class":760},[676,979,861],{"class":756},[676,981,982],{"class":760},"messageId",[676,984,985],{"class":756},",\n",[676,987,989,992,994,996,998,1001,1004,1007],{"class":678,"line":988},12,[676,990,991],{"class":829},"      approximateReceiveCount",[676,993,833],{"class":756},[676,995,933],{"class":760},[676,997,861],{"class":756},[676,999,1000],{"class":760},"attributes",[676,1002,1003],{"class":756},"?.",[676,1005,1006],{"class":760},"ApproximateReceiveCount",[676,1008,985],{"class":756},[676,1010,1012,1015],{"class":678,"line":1011},13,[676,1013,1014],{"class":756},"    }",[676,1016,881],{"class":829},[676,1018,1020],{"class":678,"line":1019},14,[676,1021,810],{"emptyLinePlaceholder":809},[676,1023,1025,1028],{"class":678,"line":1024},15,[676,1026,1027],{"class":749},"    try",[676,1029,918],{"class":756},[676,1031,1033,1036,1038,1041,1043,1046,1049,1051,1053,1056,1058,1060,1062,1065,1067,1069],{"class":678,"line":1032},16,[676,1034,1035],{"class":760},"      log",[676,1037,861],{"class":756},[676,1039,1040],{"class":816},"set",[676,1042,820],{"class":829},[676,1044,1045],{"class":756},"{",[676,1047,1048],{"class":829}," queue",[676,1050,833],{"class":756},[676,1052,757],{"class":756},[676,1054,1055],{"class":829}," name",[676,1057,833],{"class":756},[676,1059,933],{"class":760},[676,1061,861],{"class":756},[676,1063,1064],{"class":760},"eventSourceARN",[676,1066,764],{"class":756},[676,1068,764],{"class":756},[676,1070,881],{"class":829},[676,1072,1074],{"class":678,"line":1073},17,[676,1075,1077],{"class":1076},"sHwdD","      \u002F\u002F … parse record.body and process the message\n",[676,1079,1081,1083,1085,1087,1089,1091,1094,1096,1098,1101,1103,1105],{"class":678,"line":1080},18,[676,1082,1035],{"class":760},[676,1084,861],{"class":756},[676,1086,1040],{"class":816},[676,1088,820],{"class":829},[676,1090,1045],{"class":756},[676,1092,1093],{"class":829}," status",[676,1095,833],{"class":756},[676,1097,770],{"class":756},[676,1099,1100],{"class":685},"ok",[676,1102,848],{"class":756},[676,1104,764],{"class":756},[676,1106,881],{"class":829},[676,1108,1110,1112,1115,1117,1120,1122],{"class":678,"line":1109},19,[676,1111,1014],{"class":756},[676,1113,1114],{"class":749}," catch",[676,1116,927],{"class":829},[676,1118,1119],{"class":760},"error",[676,1121,947],{"class":829},[676,1123,823],{"class":756},[676,1125,1127,1129,1131,1133,1135,1137,1140,1143,1146,1149,1152,1155,1157,1159,1162,1164,1166],{"class":678,"line":1126},20,[676,1128,1035],{"class":760},[676,1130,861],{"class":756},[676,1132,1119],{"class":816},[676,1134,820],{"class":829},[676,1136,1119],{"class":760},[676,1138,1139],{"class":756}," instanceof",[676,1141,1142],{"class":682}," Error",[676,1144,1145],{"class":756}," ?",[676,1147,1148],{"class":760}," error",[676,1150,1151],{"class":756}," :",[676,1153,1154],{"class":756}," new",[676,1156,1142],{"class":816},[676,1158,820],{"class":829},[676,1160,1161],{"class":816},"String",[676,1163,820],{"class":829},[676,1165,1119],{"class":760},[676,1167,1168],{"class":829},")))\n",[676,1170,1172,1174,1176,1178,1180,1182,1184,1186,1188,1190,1192,1194],{"class":678,"line":1171},21,[676,1173,1035],{"class":760},[676,1175,861],{"class":756},[676,1177,1040],{"class":816},[676,1179,820],{"class":829},[676,1181,1045],{"class":756},[676,1183,1093],{"class":829},[676,1185,833],{"class":756},[676,1187,770],{"class":756},[676,1189,1119],{"class":685},[676,1191,848],{"class":756},[676,1193,764],{"class":756},[676,1195,881],{"class":829},[676,1197,1199,1202],{"class":678,"line":1198},22,[676,1200,1201],{"class":749},"      throw",[676,1203,1204],{"class":760}," error\n",[676,1206,1208,1210,1213],{"class":678,"line":1207},23,[676,1209,1014],{"class":756},[676,1211,1212],{"class":749}," finally",[676,1214,918],{"class":756},[676,1216,1218,1220,1222,1225],{"class":678,"line":1217},24,[676,1219,1035],{"class":760},[676,1221,861],{"class":756},[676,1223,1224],{"class":816},"emit",[676,1226,1227],{"class":829},"()\n",[676,1229,1231],{"class":678,"line":1230},25,[676,1232,1233],{"class":756},"    }\n",[676,1235,1237],{"class":678,"line":1236},26,[676,1238,1239],{"class":756},"  }\n",[676,1241,1243],{"class":678,"line":1242},27,[676,1244,1245],{"class":756},"}\n",[535,1247,1248,1249,630,1252,1254],{},"If you process the whole batch as one logical unit, use a ",[539,1250,1251],{},"single",[549,1253,559],{}," per handler invocation with batch metadata instead of one logger per record.",[606,1256,1258,1259],{"id":1257},"stdout-and-silent","Stdout and ",[549,1260,1261],{},"silent",[535,1263,1264,1265,1268,1269,1272,1273,1276,1277,861],{},"Many teams ingest Lambda logs from ",[539,1266,1267],{},"CloudWatch"," via stdout. If you use a ",[539,1270,1271],{},"drain adapter"," (OTLP, Datadog, Axiom, etc.) and want JSON or platform-specific formatting without duplicate console noise, set ",[549,1274,1275],{},"silent: true"," in production. See ",[544,1278,500],{"href":1279},"\u002Freference\u002Fconfiguration#silent-mode",[666,1281,1283],{"className":739,"code":1282,"filename":741,"language":742,"meta":672,"style":672},"import { createAxiomDrain } from 'evlog\u002Faxiom'\nimport { initLogger } from 'evlog'\n\ninitLogger({\n  env: { service: 'sqs-consumer' },\n  silent: process.env.NODE_ENV === 'production',\n  drain: createAxiomDrain(),\n})\n",[549,1284,1285,1305,1323,1327,1335,1356,1385,1399],{"__ignoreMap":672},[676,1286,1287,1289,1291,1294,1296,1298,1300,1303],{"class":678,"line":679},[676,1288,750],{"class":749},[676,1290,757],{"class":756},[676,1292,1293],{"class":760}," createAxiomDrain",[676,1295,764],{"class":756},[676,1297,767],{"class":749},[676,1299,770],{"class":756},[676,1301,1302],{"class":685},"evlog\u002Faxiom",[676,1304,776],{"class":756},[676,1306,1307,1309,1311,1313,1315,1317,1319,1321],{"class":678,"line":779},[676,1308,750],{"class":749},[676,1310,757],{"class":756},[676,1312,786],{"class":760},[676,1314,764],{"class":756},[676,1316,767],{"class":749},[676,1318,770],{"class":756},[676,1320,801],{"class":685},[676,1322,776],{"class":756},[676,1324,1325],{"class":678,"line":806},[676,1326,810],{"emptyLinePlaceholder":809},[676,1328,1329,1331,1333],{"class":678,"line":813},[676,1330,817],{"class":816},[676,1332,820],{"class":760},[676,1334,823],{"class":756},[676,1336,1337,1339,1341,1343,1345,1347,1349,1351,1353],{"class":678,"line":826},[676,1338,830],{"class":829},[676,1340,833],{"class":756},[676,1342,757],{"class":756},[676,1344,838],{"class":829},[676,1346,833],{"class":756},[676,1348,770],{"class":756},[676,1350,845],{"class":685},[676,1352,848],{"class":756},[676,1354,1355],{"class":756}," },\n",[676,1357,1358,1361,1363,1365,1367,1369,1371,1373,1376,1378,1381,1383],{"class":678,"line":875},[676,1359,1360],{"class":829},"  silent",[676,1362,833],{"class":756},[676,1364,858],{"class":760},[676,1366,861],{"class":756},[676,1368,864],{"class":760},[676,1370,861],{"class":756},[676,1372,869],{"class":760},[676,1374,1375],{"class":756},"===",[676,1377,770],{"class":756},[676,1379,1380],{"class":685},"production",[676,1382,848],{"class":756},[676,1384,985],{"class":756},[676,1386,1387,1390,1392,1394,1397],{"class":678,"line":884},[676,1388,1389],{"class":829},"  drain",[676,1391,833],{"class":756},[676,1393,1293],{"class":816},[676,1395,1396],{"class":760},"()",[676,1398,985],{"class":756},[676,1400,1401,1403],{"class":678,"line":889},[676,1402,878],{"class":756},[676,1404,881],{"class":760},[1406,1407,1410,1411,1413,1414,1417],"callout",{"color":1408,"icon":1409},"warning","i-lucide-alert-triangle","If ",[549,1412,1261],{}," is enabled without a ",[549,1415,1416],{},"drain",", events may not be visible anywhere. See the configuration docs for details.",[606,1419,1421],{"id":1420},"error-handling","Error handling",[535,1423,1424,1425,1428,1429,1432,1433,1432,1436,1439],{},"Use ",[549,1426,1427],{},"createError"," where you want structured fields (",[549,1430,1431],{},"why",", ",[549,1434,1435],{},"fix",[549,1437,1438],{},"link","). Map failures to your Lambda return or rethrow so SQS retry\u002FDLQ behavior stays correct. evlog does not replace AWS error semantics.",[666,1441,1443],{"className":739,"code":1442,"filename":741,"language":742,"meta":672,"style":672},"import { createError } from 'evlog'\n\nthrow createError({\n  message: 'Invalid payload',\n  status: 400,\n  why: 'Required field missing',\n  fix: 'Include orderId in the message body',\n})\n",[549,1444,1445,1464,1468,1479,1495,1508,1524,1540],{"__ignoreMap":672},[676,1446,1447,1449,1451,1454,1456,1458,1460,1462],{"class":678,"line":679},[676,1448,750],{"class":749},[676,1450,757],{"class":756},[676,1452,1453],{"class":760}," createError",[676,1455,764],{"class":756},[676,1457,767],{"class":749},[676,1459,770],{"class":756},[676,1461,801],{"class":685},[676,1463,776],{"class":756},[676,1465,1466],{"class":678,"line":779},[676,1467,810],{"emptyLinePlaceholder":809},[676,1469,1470,1473,1475,1477],{"class":678,"line":806},[676,1471,1472],{"class":749},"throw",[676,1474,1453],{"class":816},[676,1476,820],{"class":760},[676,1478,823],{"class":756},[676,1480,1481,1484,1486,1488,1491,1493],{"class":678,"line":813},[676,1482,1483],{"class":829},"  message",[676,1485,833],{"class":756},[676,1487,770],{"class":756},[676,1489,1490],{"class":685},"Invalid payload",[676,1492,848],{"class":756},[676,1494,985],{"class":756},[676,1496,1497,1500,1502,1506],{"class":678,"line":826},[676,1498,1499],{"class":829},"  status",[676,1501,833],{"class":756},[676,1503,1505],{"class":1504},"sbssI"," 400",[676,1507,985],{"class":756},[676,1509,1510,1513,1515,1517,1520,1522],{"class":678,"line":875},[676,1511,1512],{"class":829},"  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