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Install",[644,645,646,671,685,699],"code-group",{},[647,648,654],"pre",{"className":649,"code":650,"filename":651,"language":652,"meta":653,"style":653},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","pnpm add evlog\n","pnpm","bash","",[530,655,656],{"__ignoreMap":653},[657,658,661,664,668],"span",{"class":659,"line":660},"line",1,[657,662,651],{"class":663},"sBMFI",[657,665,667],{"class":666},"sfazB"," add",[657,669,670],{"class":666}," evlog\n",[647,672,675],{"className":649,"code":673,"filename":674,"language":652,"meta":653,"style":653},"bun add evlog\n","bun",[530,676,677],{"__ignoreMap":653},[657,678,679,681,683],{"class":659,"line":660},[657,680,674],{"class":663},[657,682,667],{"class":666},[657,684,670],{"class":666},[647,686,689],{"className":649,"code":687,"filename":688,"language":652,"meta":653,"style":653},"yarn add evlog\n","yarn",[530,690,691],{"__ignoreMap":653},[657,692,693,695,697],{"class":659,"line":660},[657,694,688],{"class":663},[657,696,667],{"class":666},[657,698,670],{"class":666},[647,700,703],{"className":649,"code":701,"filename":702,"language":652,"meta":653,"style":653},"npm install evlog\n","npm",[530,704,705],{"__ignoreMap":653},[657,706,707,709,712],{"class":659,"line":660},[657,708,702],{"class":663},[657,710,711],{"class":666}," install",[657,713,670],{"class":666},[639,715,717],{"id":716},"_2-initialize-once-log-per-invocation","2. Initialize once, log per invocation",[647,719,724],{"className":720,"code":721,"filename":722,"language":723,"meta":653,"style":653},"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",[530,725,726,758,785,792,805,854,863,868,900,931,949,967,990,998,1003,1011,1052,1059,1088,1105,1150,1177,1186,1196,1209,1215,1221],{"__ignoreMap":653},[657,727,728,732,735,739,743,746,749,752,755],{"class":659,"line":660},[657,729,731],{"class":730},"s7zQu","import",[657,733,734],{"class":730}," type",[657,736,738],{"class":737},"sMK4o"," {",[657,740,742],{"class":741},"sTEyZ"," SQSEvent",[657,744,745],{"class":737}," }",[657,747,748],{"class":730}," from",[657,750,751],{"class":737}," '",[657,753,754],{"class":666},"aws-lambda",[657,756,757],{"class":737},"'\n",[657,759,761,763,765,768,771,774,776,778,780,783],{"class":659,"line":760},2,[657,762,731],{"class":730},[657,764,738],{"class":737},[657,766,767],{"class":741}," initLogger",[657,769,770],{"class":737},",",[657,772,773],{"class":741}," createLogger",[657,775,745],{"class":737},[657,777,748],{"class":730},[657,779,751],{"class":737},[657,781,782],{"class":666},"evlog",[657,784,757],{"class":737},[657,786,788],{"class":659,"line":787},3,[657,789,791],{"emptyLinePlaceholder":790},true,"\n",[657,793,795,799,802],{"class":659,"line":794},4,[657,796,798],{"class":797},"s2Zo4","initLogger",[657,800,801],{"class":741},"(",[657,803,804],{"class":737},"{\n",[657,806,808,812,815,817,820,822,824,827,830,832,835,837,840,843,846,848,851],{"class":659,"line":807},5,[657,809,811],{"class":810},"swJcz","  env",[657,813,814],{"class":737},":",[657,816,738],{"class":737},[657,818,819],{"class":810}," service",[657,821,814],{"class":737},[657,823,751],{"class":737},[657,825,826],{"class":666},"sqs-consumer",[657,828,829],{"class":737},"'",[657,831,770],{"class":737},[657,833,834],{"class":810}," environment",[657,836,814],{"class":737},[657,838,839],{"class":741}," process",[657,841,842],{"class":737},".",[657,844,845],{"class":741},"env",[657,847,842],{"class":737},[657,849,850],{"class":741},"NODE_ENV ",[657,852,853],{"class":737},"},\n",[657,855,857,860],{"class":659,"line":856},6,[657,858,859],{"class":737},"}",[657,861,862],{"class":741},")\n",[657,864,866],{"class":659,"line":865},7,[657,867,791],{"emptyLinePlaceholder":790},[657,869,871,874,878,881,884,886,890,892,894,897],{"class":659,"line":870},8,[657,872,873],{"class":730},"export",[657,875,877],{"class":876},"spNyl"," async",[657,879,880],{"class":876}," function",[657,882,883],{"class":797}," handler",[657,885,801],{"class":737},[657,887,889],{"class":888},"sHdIc","event",[657,891,814],{"class":737},[657,893,742],{"class":663},[657,895,896],{"class":737},")",[657,898,899],{"class":737}," {\n",[657,901,903,906,909,912,915,918,921,923,926,929],{"class":659,"line":902},9,[657,904,905],{"class":730},"  for",[657,907,908],{"class":810}," (",[657,910,911],{"class":876},"const",[657,913,914],{"class":741}," record",[657,916,917],{"class":737}," of",[657,919,920],{"class":741}," event",[657,922,842],{"class":737},[657,924,925],{"class":741},"Records",[657,927,928],{"class":810},") ",[657,930,804],{"class":737},[657,932,934,937,940,943,945,947],{"class":659,"line":933},10,[657,935,936],{"class":876},"    const",[657,938,939],{"class":741}," log",[657,941,942],{"class":737}," =",[657,944,773],{"class":797},[657,946,801],{"class":810},[657,948,804],{"class":737},[657,950,952,955,957,959,961,964],{"class":659,"line":951},11,[657,953,954],{"class":810},"      messageId",[657,956,814],{"class":737},[657,958,914],{"class":741},[657,960,842],{"class":737},[657,962,963],{"class":741},"messageId",[657,965,966],{"class":737},",\n",[657,968,970,973,975,977,979,982,985,988],{"class":659,"line":969},12,[657,971,972],{"class":810},"      approximateReceiveCount",[657,974,814],{"class":737},[657,976,914],{"class":741},[657,978,842],{"class":737},[657,980,981],{"class":741},"attributes",[657,983,984],{"class":737},"?.",[657,986,987],{"class":741},"ApproximateReceiveCount",[657,989,966],{"class":737},[657,991,993,996],{"class":659,"line":992},13,[657,994,995],{"class":737},"    }",[657,997,862],{"class":810},[657,999,1001],{"class":659,"line":1000},14,[657,1002,791],{"emptyLinePlaceholder":790},[657,1004,1006,1009],{"class":659,"line":1005},15,[657,1007,1008],{"class":730},"    try",[657,1010,899],{"class":737},[657,1012,1014,1017,1019,1022,1024,1027,1030,1032,1034,1037,1039,1041,1043,1046,1048,1050],{"class":659,"line":1013},16,[657,1015,1016],{"class":741},"      log",[657,1018,842],{"class":737},[657,1020,1021],{"class":797},"set",[657,1023,801],{"class":810},[657,1025,1026],{"class":737},"{",[657,1028,1029],{"class":810}," queue",[657,1031,814],{"class":737},[657,1033,738],{"class":737},[657,1035,1036],{"class":810}," name",[657,1038,814],{"class":737},[657,1040,914],{"class":741},[657,1042,842],{"class":737},[657,1044,1045],{"class":741},"eventSourceARN",[657,1047,745],{"class":737},[657,1049,745],{"class":737},[657,1051,862],{"class":810},[657,1053,1055],{"class":659,"line":1054},17,[657,1056,1058],{"class":1057},"sHwdD","      \u002F\u002F … parse record.body and process the message\n",[657,1060,1062,1064,1066,1068,1070,1072,1075,1077,1079,1082,1084,1086],{"class":659,"line":1061},18,[657,1063,1016],{"class":741},[657,1065,842],{"class":737},[657,1067,1021],{"class":797},[657,1069,801],{"class":810},[657,1071,1026],{"class":737},[657,1073,1074],{"class":810}," status",[657,1076,814],{"class":737},[657,1078,751],{"class":737},[657,1080,1081],{"class":666},"ok",[657,1083,829],{"class":737},[657,1085,745],{"class":737},[657,1087,862],{"class":810},[657,1089,1091,1093,1096,1098,1101,1103],{"class":659,"line":1090},19,[657,1092,995],{"class":737},[657,1094,1095],{"class":730}," catch",[657,1097,908],{"class":810},[657,1099,1100],{"class":741},"error",[657,1102,928],{"class":810},[657,1104,804],{"class":737},[657,1106,1108,1110,1112,1114,1116,1118,1121,1124,1127,1130,1133,1136,1138,1140,1143,1145,1147],{"class":659,"line":1107},20,[657,1109,1016],{"class":741},[657,1111,842],{"class":737},[657,1113,1100],{"class":797},[657,1115,801],{"class":810},[657,1117,1100],{"class":741},[657,1119,1120],{"class":737}," instanceof",[657,1122,1123],{"class":663}," Error",[657,1125,1126],{"class":737}," ?",[657,1128,1129],{"class":741}," error",[657,1131,1132],{"class":737}," :",[657,1134,1135],{"class":737}," new",[657,1137,1123],{"class":797},[657,1139,801],{"class":810},[657,1141,1142],{"class":797},"String",[657,1144,801],{"class":810},[657,1146,1100],{"class":741},[657,1148,1149],{"class":810},")))\n",[657,1151,1153,1155,1157,1159,1161,1163,1165,1167,1169,1171,1173,1175],{"class":659,"line":1152},21,[657,1154,1016],{"class":741},[657,1156,842],{"class":737},[657,1158,1021],{"class":797},[657,1160,801],{"class":810},[657,1162,1026],{"class":737},[657,1164,1074],{"class":810},[657,1166,814],{"class":737},[657,1168,751],{"class":737},[657,1170,1100],{"class":666},[657,1172,829],{"class":737},[657,1174,745],{"class":737},[657,1176,862],{"class":810},[657,1178,1180,1183],{"class":659,"line":1179},22,[657,1181,1182],{"class":730},"      throw",[657,1184,1185],{"class":741}," error\n",[657,1187,1189,1191,1194],{"class":659,"line":1188},23,[657,1190,995],{"class":737},[657,1192,1193],{"class":730}," finally",[657,1195,899],{"class":737},[657,1197,1199,1201,1203,1206],{"class":659,"line":1198},24,[657,1200,1016],{"class":741},[657,1202,842],{"class":737},[657,1204,1205],{"class":797},"emit",[657,1207,1208],{"class":810},"()\n",[657,1210,1212],{"class":659,"line":1211},25,[657,1213,1214],{"class":737},"    }\n",[657,1216,1218],{"class":659,"line":1217},26,[657,1219,1220],{"class":737},"  }\n",[657,1222,1224],{"class":659,"line":1223},27,[657,1225,1226],{"class":737},"}\n",[516,1228,1229,1230,611,1233,1235],{},"If you process the whole batch as one logical unit, use a ",[520,1231,1232],{},"single",[530,1234,540],{}," per handler invocation with batch metadata instead of one logger per record.",[587,1237,1239,1240],{"id":1238},"stdout-and-silent","Stdout and ",[530,1241,1242],{},"silent",[516,1244,1245,1246,1249,1250,1253,1254,1257,1258,842],{},"Many teams ingest Lambda logs from ",[520,1247,1248],{},"CloudWatch"," via stdout. If you use a ",[520,1251,1252],{},"drain adapter"," (OTLP, Datadog, Axiom, etc.) and want JSON or platform-specific formatting without duplicate console noise, set ",[530,1255,1256],{},"silent: true"," in production—see ",[525,1259,485],{"href":1260},"\u002Freference\u002Fconfiguration#silent-mode",[647,1262,1264],{"className":720,"code":1263,"filename":722,"language":723,"meta":653,"style":653},"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",[530,1265,1266,1286,1304,1308,1316,1337,1366,1380],{"__ignoreMap":653},[657,1267,1268,1270,1272,1275,1277,1279,1281,1284],{"class":659,"line":660},[657,1269,731],{"class":730},[657,1271,738],{"class":737},[657,1273,1274],{"class":741}," createAxiomDrain",[657,1276,745],{"class":737},[657,1278,748],{"class":730},[657,1280,751],{"class":737},[657,1282,1283],{"class":666},"evlog\u002Faxiom",[657,1285,757],{"class":737},[657,1287,1288,1290,1292,1294,1296,1298,1300,1302],{"class":659,"line":760},[657,1289,731],{"class":730},[657,1291,738],{"class":737},[657,1293,767],{"class":741},[657,1295,745],{"class":737},[657,1297,748],{"class":730},[657,1299,751],{"class":737},[657,1301,782],{"class":666},[657,1303,757],{"class":737},[657,1305,1306],{"class":659,"line":787},[657,1307,791],{"emptyLinePlaceholder":790},[657,1309,1310,1312,1314],{"class":659,"line":794},[657,1311,798],{"class":797},[657,1313,801],{"class":741},[657,1315,804],{"class":737},[657,1317,1318,1320,1322,1324,1326,1328,1330,1332,1334],{"class":659,"line":807},[657,1319,811],{"class":810},[657,1321,814],{"class":737},[657,1323,738],{"class":737},[657,1325,819],{"class":810},[657,1327,814],{"class":737},[657,1329,751],{"class":737},[657,1331,826],{"class":666},[657,1333,829],{"class":737},[657,1335,1336],{"class":737}," },\n",[657,1338,1339,1342,1344,1346,1348,1350,1352,1354,1357,1359,1362,1364],{"class":659,"line":856},[657,1340,1341],{"class":810},"  silent",[657,1343,814],{"class":737},[657,1345,839],{"class":741},[657,1347,842],{"class":737},[657,1349,845],{"class":741},[657,1351,842],{"class":737},[657,1353,850],{"class":741},[657,1355,1356],{"class":737},"===",[657,1358,751],{"class":737},[657,1360,1361],{"class":666},"production",[657,1363,829],{"class":737},[657,1365,966],{"class":737},[657,1367,1368,1371,1373,1375,1378],{"class":659,"line":865},[657,1369,1370],{"class":810},"  drain",[657,1372,814],{"class":737},[657,1374,1274],{"class":797},[657,1376,1377],{"class":741},"()",[657,1379,966],{"class":737},[657,1381,1382,1384],{"class":659,"line":870},[657,1383,859],{"class":737},[657,1385,862],{"class":741},[1387,1388,1391,1392,1394,1395,1398],"callout",{"color":1389,"icon":1390},"warning","i-lucide-alert-triangle","If ",[530,1393,1242],{}," is enabled without a ",[530,1396,1397],{},"drain",", events may not be visible anywhere. See the configuration docs for details.",[587,1400,1402],{"id":1401},"error-handling","Error handling",[516,1404,1405,1406,1409,1410,1413,1414,1413,1417,1420],{},"Use ",[530,1407,1408],{},"createError"," where you want structured fields (",[530,1411,1412],{},"why",", ",[530,1415,1416],{},"fix",[530,1418,1419],{},"link","). Map failures to your Lambda return or rethrow so SQS retry\u002FDLQ behavior stays correct—evlog does not replace AWS error semantics.",[647,1422,1424],{"className":720,"code":1423,"filename":722,"language":723,"meta":653,"style":653},"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",[530,1425,1426,1445,1449,1460,1476,1489,1505,1521],{"__ignoreMap":653},[657,1427,1428,1430,1432,1435,1437,1439,1441,1443],{"class":659,"line":660},[657,1429,731],{"class":730},[657,1431,738],{"class":737},[657,1433,1434],{"class":741}," createError",[657,1436,745],{"class":737},[657,1438,748],{"class":730},[657,1440,751],{"class":737},[657,1442,782],{"class":666},[657,1444,757],{"class":737},[657,1446,1447],{"class":659,"line":760},[657,1448,791],{"emptyLinePlaceholder":790},[657,1450,1451,1454,1456,1458],{"class":659,"line":787},[657,1452,1453],{"class":730},"throw",[657,1455,1434],{"class":797},[657,1457,801],{"class":741},[657,1459,804],{"class":737},[657,1461,1462,1465,1467,1469,1472,1474],{"class":659,"line":794},[657,1463,1464],{"class":810},"  message",[657,1466,814],{"class":737},[657,1468,751],{"class":737},[657,1470,1471],{"class":666},"Invalid payload",[657,1473,829],{"class":737},[657,1475,966],{"class":737},[657,1477,1478,1481,1483,1487],{"class":659,"line":807},[657,1479,1480],{"class":810},"  status",[657,1482,814],{"class":737},[657,1484,1486],{"class":1485},"sbssI"," 400",[657,1488,966],{"class":737},[657,1490,1491,1494,1496,1498,1501,1503],{"class":659,"line":856},[657,1492,1493],{"class":810},"  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