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Install",[672,673,674,699,713,727],"code-group",{},[675,676,682],"pre",{"className":677,"code":678,"filename":679,"language":680,"meta":681,"style":681},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","pnpm add evlog\n","pnpm","bash","",[558,683,684],{"__ignoreMap":681},[685,686,689,692,696],"span",{"class":687,"line":688},"line",1,[685,690,679],{"class":691},"sBMFI",[685,693,695],{"class":694},"sfazB"," add",[685,697,698],{"class":694}," evlog\n",[675,700,703],{"className":677,"code":701,"filename":702,"language":680,"meta":681,"style":681},"bun add evlog\n","bun",[558,704,705],{"__ignoreMap":681},[685,706,707,709,711],{"class":687,"line":688},[685,708,702],{"class":691},[685,710,695],{"class":694},[685,712,698],{"class":694},[675,714,717],{"className":677,"code":715,"filename":716,"language":680,"meta":681,"style":681},"yarn add evlog\n","yarn",[558,718,719],{"__ignoreMap":681},[685,720,721,723,725],{"class":687,"line":688},[685,722,716],{"class":691},[685,724,695],{"class":694},[685,726,698],{"class":694},[675,728,731],{"className":677,"code":729,"filename":730,"language":680,"meta":681,"style":681},"npm install evlog\n","npm",[558,732,733],{"__ignoreMap":681},[685,734,735,737,740],{"class":687,"line":688},[685,736,730],{"class":691},[685,738,739],{"class":694}," install",[685,741,698],{"class":694},[667,743,745],{"id":744},"_2-initialize-once-log-per-invocation","2. Initialize once, log per invocation",[675,747,752],{"className":748,"code":749,"filename":750,"language":751,"meta":681,"style":681},"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",[558,753,754,786,813,820,833,882,891,896,928,959,977,995,1018,1026,1031,1039,1080,1087,1116,1133,1178,1205,1214,1224,1237,1243,1249],{"__ignoreMap":681},[685,755,756,760,763,767,771,774,777,780,783],{"class":687,"line":688},[685,757,759],{"class":758},"s7zQu","import",[685,761,762],{"class":758}," type",[685,764,766],{"class":765},"sMK4o"," {",[685,768,770],{"class":769},"sTEyZ"," SQSEvent",[685,772,773],{"class":765}," }",[685,775,776],{"class":758}," from",[685,778,779],{"class":765}," '",[685,781,782],{"class":694},"aws-lambda",[685,784,785],{"class":765},"'\n",[685,787,789,791,793,796,799,802,804,806,808,811],{"class":687,"line":788},2,[685,790,759],{"class":758},[685,792,766],{"class":765},[685,794,795],{"class":769}," initLogger",[685,797,798],{"class":765},",",[685,800,801],{"class":769}," createLogger",[685,803,773],{"class":765},[685,805,776],{"class":758},[685,807,779],{"class":765},[685,809,810],{"class":694},"evlog",[685,812,785],{"class":765},[685,814,816],{"class":687,"line":815},3,[685,817,819],{"emptyLinePlaceholder":818},true,"\n",[685,821,823,827,830],{"class":687,"line":822},4,[685,824,826],{"class":825},"s2Zo4","initLogger",[685,828,829],{"class":769},"(",[685,831,832],{"class":765},"{\n",[685,834,836,840,843,845,848,850,852,855,858,860,863,865,868,871,874,876,879],{"class":687,"line":835},5,[685,837,839],{"class":838},"swJcz","  env",[685,841,842],{"class":765},":",[685,844,766],{"class":765},[685,846,847],{"class":838}," service",[685,849,842],{"class":765},[685,851,779],{"class":765},[685,853,854],{"class":694},"sqs-consumer",[685,856,857],{"class":765},"'",[685,859,798],{"class":765},[685,861,862],{"class":838}," environment",[685,864,842],{"class":765},[685,866,867],{"class":769}," process",[685,869,870],{"class":765},".",[685,872,873],{"class":769},"env",[685,875,870],{"class":765},[685,877,878],{"class":769},"NODE_ENV ",[685,880,881],{"class":765},"},\n",[685,883,885,888],{"class":687,"line":884},6,[685,886,887],{"class":765},"}",[685,889,890],{"class":769},")\n",[685,892,894],{"class":687,"line":893},7,[685,895,819],{"emptyLinePlaceholder":818},[685,897,899,902,906,909,912,914,918,920,922,925],{"class":687,"line":898},8,[685,900,901],{"class":758},"export",[685,903,905],{"class":904},"spNyl"," async",[685,907,908],{"class":904}," function",[685,910,911],{"class":825}," handler",[685,913,829],{"class":765},[685,915,917],{"class":916},"sHdIc","event",[685,919,842],{"class":765},[685,921,770],{"class":691},[685,923,924],{"class":765},")",[685,926,927],{"class":765}," {\n",[685,929,931,934,937,940,943,946,949,951,954,957],{"class":687,"line":930},9,[685,932,933],{"class":758},"  for",[685,935,936],{"class":838}," (",[685,938,939],{"class":904},"const",[685,941,942],{"class":769}," record",[685,944,945],{"class":765}," of",[685,947,948],{"class":769}," event",[685,950,870],{"class":765},[685,952,953],{"class":769},"Records",[685,955,956],{"class":838},") ",[685,958,832],{"class":765},[685,960,962,965,968,971,973,975],{"class":687,"line":961},10,[685,963,964],{"class":904},"    const",[685,966,967],{"class":769}," log",[685,969,970],{"class":765}," =",[685,972,801],{"class":825},[685,974,829],{"class":838},[685,976,832],{"class":765},[685,978,980,983,985,987,989,992],{"class":687,"line":979},11,[685,981,982],{"class":838},"      messageId",[685,984,842],{"class":765},[685,986,942],{"class":769},[685,988,870],{"class":765},[685,990,991],{"class":769},"messageId",[685,993,994],{"class":765},",\n",[685,996,998,1001,1003,1005,1007,1010,1013,1016],{"class":687,"line":997},12,[685,999,1000],{"class":838},"      approximateReceiveCount",[685,1002,842],{"class":765},[685,1004,942],{"class":769},[685,1006,870],{"class":765},[685,1008,1009],{"class":769},"attributes",[685,1011,1012],{"class":765},"?.",[685,1014,1015],{"class":769},"ApproximateReceiveCount",[685,1017,994],{"class":765},[685,1019,1021,1024],{"class":687,"line":1020},13,[685,1022,1023],{"class":765},"    }",[685,1025,890],{"class":838},[685,1027,1029],{"class":687,"line":1028},14,[685,1030,819],{"emptyLinePlaceholder":818},[685,1032,1034,1037],{"class":687,"line":1033},15,[685,1035,1036],{"class":758},"    try",[685,1038,927],{"class":765},[685,1040,1042,1045,1047,1050,1052,1055,1058,1060,1062,1065,1067,1069,1071,1074,1076,1078],{"class":687,"line":1041},16,[685,1043,1044],{"class":769},"      log",[685,1046,870],{"class":765},[685,1048,1049],{"class":825},"set",[685,1051,829],{"class":838},[685,1053,1054],{"class":765},"{",[685,1056,1057],{"class":838}," queue",[685,1059,842],{"class":765},[685,1061,766],{"class":765},[685,1063,1064],{"class":838}," name",[685,1066,842],{"class":765},[685,1068,942],{"class":769},[685,1070,870],{"class":765},[685,1072,1073],{"class":769},"eventSourceARN",[685,1075,773],{"class":765},[685,1077,773],{"class":765},[685,1079,890],{"class":838},[685,1081,1083],{"class":687,"line":1082},17,[685,1084,1086],{"class":1085},"sHwdD","      \u002F\u002F … parse record.body and process the message\n",[685,1088,1090,1092,1094,1096,1098,1100,1103,1105,1107,1110,1112,1114],{"class":687,"line":1089},18,[685,1091,1044],{"class":769},[685,1093,870],{"class":765},[685,1095,1049],{"class":825},[685,1097,829],{"class":838},[685,1099,1054],{"class":765},[685,1101,1102],{"class":838}," status",[685,1104,842],{"class":765},[685,1106,779],{"class":765},[685,1108,1109],{"class":694},"ok",[685,1111,857],{"class":765},[685,1113,773],{"class":765},[685,1115,890],{"class":838},[685,1117,1119,1121,1124,1126,1129,1131],{"class":687,"line":1118},19,[685,1120,1023],{"class":765},[685,1122,1123],{"class":758}," catch",[685,1125,936],{"class":838},[685,1127,1128],{"class":769},"error",[685,1130,956],{"class":838},[685,1132,832],{"class":765},[685,1134,1136,1138,1140,1142,1144,1146,1149,1152,1155,1158,1161,1164,1166,1168,1171,1173,1175],{"class":687,"line":1135},20,[685,1137,1044],{"class":769},[685,1139,870],{"class":765},[685,1141,1128],{"class":825},[685,1143,829],{"class":838},[685,1145,1128],{"class":769},[685,1147,1148],{"class":765}," instanceof",[685,1150,1151],{"class":691}," Error",[685,1153,1154],{"class":765}," ?",[685,1156,1157],{"class":769}," error",[685,1159,1160],{"class":765}," :",[685,1162,1163],{"class":765}," new",[685,1165,1151],{"class":825},[685,1167,829],{"class":838},[685,1169,1170],{"class":825},"String",[685,1172,829],{"class":838},[685,1174,1128],{"class":769},[685,1176,1177],{"class":838},")))\n",[685,1179,1181,1183,1185,1187,1189,1191,1193,1195,1197,1199,1201,1203],{"class":687,"line":1180},21,[685,1182,1044],{"class":769},[685,1184,870],{"class":765},[685,1186,1049],{"class":825},[685,1188,829],{"class":838},[685,1190,1054],{"class":765},[685,1192,1102],{"class":838},[685,1194,842],{"class":765},[685,1196,779],{"class":765},[685,1198,1128],{"class":694},[685,1200,857],{"class":765},[685,1202,773],{"class":765},[685,1204,890],{"class":838},[685,1206,1208,1211],{"class":687,"line":1207},22,[685,1209,1210],{"class":758},"      throw",[685,1212,1213],{"class":769}," error\n",[685,1215,1217,1219,1222],{"class":687,"line":1216},23,[685,1218,1023],{"class":765},[685,1220,1221],{"class":758}," finally",[685,1223,927],{"class":765},[685,1225,1227,1229,1231,1234],{"class":687,"line":1226},24,[685,1228,1044],{"class":769},[685,1230,870],{"class":765},[685,1232,1233],{"class":825},"emit",[685,1235,1236],{"class":838},"()\n",[685,1238,1240],{"class":687,"line":1239},25,[685,1241,1242],{"class":765},"    }\n",[685,1244,1246],{"class":687,"line":1245},26,[685,1247,1248],{"class":765},"  }\n",[685,1250,1252],{"class":687,"line":1251},27,[685,1253,1254],{"class":765},"}\n",[544,1256,1257,1258,639,1261,1263],{},"If you process the whole batch as one logical unit, use a ",[548,1259,1260],{},"single",[558,1262,568],{}," per handler invocation with batch metadata instead of one logger per record.",[615,1265,1267,1268],{"id":1266},"stdout-and-silent","Stdout and ",[558,1269,1270],{},"silent",[544,1272,1273,1274,1277,1278,1281,1282,1285,1286,870],{},"Many teams ingest Lambda logs from ",[548,1275,1276],{},"CloudWatch"," via stdout. If you use a ",[548,1279,1280],{},"drain adapter"," (OTLP, Datadog, Axiom, etc.) and want JSON or platform-specific formatting without duplicate console noise, set ",[558,1283,1284],{},"silent: true"," in production. See ",[553,1287,508],{"href":1288},"\u002Freference\u002Fconfiguration#silence-the-terminal",[675,1290,1292],{"className":748,"code":1291,"filename":750,"language":751,"meta":681,"style":681},"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",[558,1293,1294,1314,1332,1336,1344,1365,1394,1408],{"__ignoreMap":681},[685,1295,1296,1298,1300,1303,1305,1307,1309,1312],{"class":687,"line":688},[685,1297,759],{"class":758},[685,1299,766],{"class":765},[685,1301,1302],{"class":769}," createAxiomDrain",[685,1304,773],{"class":765},[685,1306,776],{"class":758},[685,1308,779],{"class":765},[685,1310,1311],{"class":694},"evlog\u002Faxiom",[685,1313,785],{"class":765},[685,1315,1316,1318,1320,1322,1324,1326,1328,1330],{"class":687,"line":788},[685,1317,759],{"class":758},[685,1319,766],{"class":765},[685,1321,795],{"class":769},[685,1323,773],{"class":765},[685,1325,776],{"class":758},[685,1327,779],{"class":765},[685,1329,810],{"class":694},[685,1331,785],{"class":765},[685,1333,1334],{"class":687,"line":815},[685,1335,819],{"emptyLinePlaceholder":818},[685,1337,1338,1340,1342],{"class":687,"line":822},[685,1339,826],{"class":825},[685,1341,829],{"class":769},[685,1343,832],{"class":765},[685,1345,1346,1348,1350,1352,1354,1356,1358,1360,1362],{"class":687,"line":835},[685,1347,839],{"class":838},[685,1349,842],{"class":765},[685,1351,766],{"class":765},[685,1353,847],{"class":838},[685,1355,842],{"class":765},[685,1357,779],{"class":765},[685,1359,854],{"class":694},[685,1361,857],{"class":765},[685,1363,1364],{"class":765}," },\n",[685,1366,1367,1370,1372,1374,1376,1378,1380,1382,1385,1387,1390,1392],{"class":687,"line":884},[685,1368,1369],{"class":838},"  silent",[685,1371,842],{"class":765},[685,1373,867],{"class":769},[685,1375,870],{"class":765},[685,1377,873],{"class":769},[685,1379,870],{"class":765},[685,1381,878],{"class":769},[685,1383,1384],{"class":765},"===",[685,1386,779],{"class":765},[685,1388,1389],{"class":694},"production",[685,1391,857],{"class":765},[685,1393,994],{"class":765},[685,1395,1396,1399,1401,1403,1406],{"class":687,"line":893},[685,1397,1398],{"class":838},"  drain",[685,1400,842],{"class":765},[685,1402,1302],{"class":825},[685,1404,1405],{"class":769},"()",[685,1407,994],{"class":765},[685,1409,1410,1412],{"class":687,"line":898},[685,1411,887],{"class":765},[685,1413,890],{"class":769},[1415,1416,1419,1420,1422,1423,1426],"callout",{"color":1417,"icon":1418},"warning","i-lucide-alert-triangle","If ",[558,1421,1270],{}," is enabled without a ",[558,1424,1425],{},"drain",", events may not be visible anywhere. See the configuration docs for details.",[615,1428,1430],{"id":1429},"error-handling","Error handling",[544,1432,1433,1434,1437,1438,1441,1442,1441,1445,1448],{},"Use ",[558,1435,1436],{},"createError"," where you want structured fields (",[558,1439,1440],{},"why",", ",[558,1443,1444],{},"fix",[558,1446,1447],{},"link","). Map failures to your Lambda return or rethrow so SQS retry\u002FDLQ behavior stays correct. evlog does not replace AWS error semantics.",[675,1450,1452],{"className":748,"code":1451,"filename":750,"language":751,"meta":681,"style":681},"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",[558,1453,1454,1473,1477,1488,1504,1517,1533,1549],{"__ignoreMap":681},[685,1455,1456,1458,1460,1463,1465,1467,1469,1471],{"class":687,"line":688},[685,1457,759],{"class":758},[685,1459,766],{"class":765},[685,1461,1462],{"class":769}," createError",[685,1464,773],{"class":765},[685,1466,776],{"class":758},[685,1468,779],{"class":765},[685,1470,810],{"class":694},[685,1472,785],{"class":765},[685,1474,1475],{"class":687,"line":788},[685,1476,819],{"emptyLinePlaceholder":818},[685,1478,1479,1482,1484,1486],{"class":687,"line":815},[685,1480,1481],{"class":758},"throw",[685,1483,1462],{"class":825},[685,1485,829],{"class":769},[685,1487,832],{"class":765},[685,1489,1490,1493,1495,1497,1500,1502],{"class":687,"line":822},[685,1491,1492],{"class":838},"  message",[685,1494,842],{"class":765},[685,1496,779],{"class":765},[685,1498,1499],{"class":694},"Invalid payload",[685,1501,857],{"class":765},[685,1503,994],{"class":765},[685,1505,1506,1509,1511,1515],{"class":687,"line":835},[685,1507,1508],{"class":838},"  status",[685,1510,842],{"class":765},[685,1512,1514],{"class":1513},"sbssI"," 400",[685,1516,994],{"class":765},[685,1518,1519,1522,1524,1526,1529,1531],{"class":687,"line":884},[685,1520,1521],{"class":838},"  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