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Install",[659,660,661,686,700,714],"code-group",{},[662,663,669],"pre",{"className":664,"code":665,"filename":666,"language":667,"meta":668,"style":668},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","pnpm add evlog\n","pnpm","bash","",[545,670,671],{"__ignoreMap":668},[672,673,676,679,683],"span",{"class":674,"line":675},"line",1,[672,677,666],{"class":678},"sBMFI",[672,680,682],{"class":681},"sfazB"," add",[672,684,685],{"class":681}," evlog\n",[662,687,690],{"className":664,"code":688,"filename":689,"language":667,"meta":668,"style":668},"bun add evlog\n","bun",[545,691,692],{"__ignoreMap":668},[672,693,694,696,698],{"class":674,"line":675},[672,695,689],{"class":678},[672,697,682],{"class":681},[672,699,685],{"class":681},[662,701,704],{"className":664,"code":702,"filename":703,"language":667,"meta":668,"style":668},"yarn add evlog\n","yarn",[545,705,706],{"__ignoreMap":668},[672,707,708,710,712],{"class":674,"line":675},[672,709,703],{"class":678},[672,711,682],{"class":681},[672,713,685],{"class":681},[662,715,718],{"className":664,"code":716,"filename":717,"language":667,"meta":668,"style":668},"npm install evlog\n","npm",[545,719,720],{"__ignoreMap":668},[672,721,722,724,727],{"class":674,"line":675},[672,723,717],{"class":678},[672,725,726],{"class":681}," install",[672,728,685],{"class":681},[654,730,732],{"id":731},"_2-initialize-once-log-per-invocation","2. Initialize once, log per invocation",[662,734,739],{"className":735,"code":736,"filename":737,"language":738,"meta":668,"style":668},"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",[545,740,741,773,800,807,820,869,878,883,915,946,964,982,1005,1013,1018,1026,1067,1074,1103,1120,1165,1192,1201,1211,1224,1230,1236],{"__ignoreMap":668},[672,742,743,747,750,754,758,761,764,767,770],{"class":674,"line":675},[672,744,746],{"class":745},"s7zQu","import",[672,748,749],{"class":745}," type",[672,751,753],{"class":752},"sMK4o"," {",[672,755,757],{"class":756},"sTEyZ"," SQSEvent",[672,759,760],{"class":752}," }",[672,762,763],{"class":745}," from",[672,765,766],{"class":752}," '",[672,768,769],{"class":681},"aws-lambda",[672,771,772],{"class":752},"'\n",[672,774,776,778,780,783,786,789,791,793,795,798],{"class":674,"line":775},2,[672,777,746],{"class":745},[672,779,753],{"class":752},[672,781,782],{"class":756}," initLogger",[672,784,785],{"class":752},",",[672,787,788],{"class":756}," createLogger",[672,790,760],{"class":752},[672,792,763],{"class":745},[672,794,766],{"class":752},[672,796,797],{"class":681},"evlog",[672,799,772],{"class":752},[672,801,803],{"class":674,"line":802},3,[672,804,806],{"emptyLinePlaceholder":805},true,"\n",[672,808,810,814,817],{"class":674,"line":809},4,[672,811,813],{"class":812},"s2Zo4","initLogger",[672,815,816],{"class":756},"(",[672,818,819],{"class":752},"{\n",[672,821,823,827,830,832,835,837,839,842,845,847,850,852,855,858,861,863,866],{"class":674,"line":822},5,[672,824,826],{"class":825},"swJcz","  env",[672,828,829],{"class":752},":",[672,831,753],{"class":752},[672,833,834],{"class":825}," service",[672,836,829],{"class":752},[672,838,766],{"class":752},[672,840,841],{"class":681},"sqs-consumer",[672,843,844],{"class":752},"'",[672,846,785],{"class":752},[672,848,849],{"class":825}," environment",[672,851,829],{"class":752},[672,853,854],{"class":756}," process",[672,856,857],{"class":752},".",[672,859,860],{"class":756},"env",[672,862,857],{"class":752},[672,864,865],{"class":756},"NODE_ENV ",[672,867,868],{"class":752},"},\n",[672,870,872,875],{"class":674,"line":871},6,[672,873,874],{"class":752},"}",[672,876,877],{"class":756},")\n",[672,879,881],{"class":674,"line":880},7,[672,882,806],{"emptyLinePlaceholder":805},[672,884,886,889,893,896,899,901,905,907,909,912],{"class":674,"line":885},8,[672,887,888],{"class":745},"export",[672,890,892],{"class":891},"spNyl"," async",[672,894,895],{"class":891}," function",[672,897,898],{"class":812}," handler",[672,900,816],{"class":752},[672,902,904],{"class":903},"sHdIc","event",[672,906,829],{"class":752},[672,908,757],{"class":678},[672,910,911],{"class":752},")",[672,913,914],{"class":752}," {\n",[672,916,918,921,924,927,930,933,936,938,941,944],{"class":674,"line":917},9,[672,919,920],{"class":745},"  for",[672,922,923],{"class":825}," (",[672,925,926],{"class":891},"const",[672,928,929],{"class":756}," record",[672,931,932],{"class":752}," of",[672,934,935],{"class":756}," event",[672,937,857],{"class":752},[672,939,940],{"class":756},"Records",[672,942,943],{"class":825},") ",[672,945,819],{"class":752},[672,947,949,952,955,958,960,962],{"class":674,"line":948},10,[672,950,951],{"class":891},"    const",[672,953,954],{"class":756}," log",[672,956,957],{"class":752}," =",[672,959,788],{"class":812},[672,961,816],{"class":825},[672,963,819],{"class":752},[672,965,967,970,972,974,976,979],{"class":674,"line":966},11,[672,968,969],{"class":825},"      messageId",[672,971,829],{"class":752},[672,973,929],{"class":756},[672,975,857],{"class":752},[672,977,978],{"class":756},"messageId",[672,980,981],{"class":752},",\n",[672,983,985,988,990,992,994,997,1000,1003],{"class":674,"line":984},12,[672,986,987],{"class":825},"      approximateReceiveCount",[672,989,829],{"class":752},[672,991,929],{"class":756},[672,993,857],{"class":752},[672,995,996],{"class":756},"attributes",[672,998,999],{"class":752},"?.",[672,1001,1002],{"class":756},"ApproximateReceiveCount",[672,1004,981],{"class":752},[672,1006,1008,1011],{"class":674,"line":1007},13,[672,1009,1010],{"class":752},"    }",[672,1012,877],{"class":825},[672,1014,1016],{"class":674,"line":1015},14,[672,1017,806],{"emptyLinePlaceholder":805},[672,1019,1021,1024],{"class":674,"line":1020},15,[672,1022,1023],{"class":745},"    try",[672,1025,914],{"class":752},[672,1027,1029,1032,1034,1037,1039,1042,1045,1047,1049,1052,1054,1056,1058,1061,1063,1065],{"class":674,"line":1028},16,[672,1030,1031],{"class":756},"      log",[672,1033,857],{"class":752},[672,1035,1036],{"class":812},"set",[672,1038,816],{"class":825},[672,1040,1041],{"class":752},"{",[672,1043,1044],{"class":825}," queue",[672,1046,829],{"class":752},[672,1048,753],{"class":752},[672,1050,1051],{"class":825}," name",[672,1053,829],{"class":752},[672,1055,929],{"class":756},[672,1057,857],{"class":752},[672,1059,1060],{"class":756},"eventSourceARN",[672,1062,760],{"class":752},[672,1064,760],{"class":752},[672,1066,877],{"class":825},[672,1068,1070],{"class":674,"line":1069},17,[672,1071,1073],{"class":1072},"sHwdD","      \u002F\u002F … parse record.body and process the message\n",[672,1075,1077,1079,1081,1083,1085,1087,1090,1092,1094,1097,1099,1101],{"class":674,"line":1076},18,[672,1078,1031],{"class":756},[672,1080,857],{"class":752},[672,1082,1036],{"class":812},[672,1084,816],{"class":825},[672,1086,1041],{"class":752},[672,1088,1089],{"class":825}," status",[672,1091,829],{"class":752},[672,1093,766],{"class":752},[672,1095,1096],{"class":681},"ok",[672,1098,844],{"class":752},[672,1100,760],{"class":752},[672,1102,877],{"class":825},[672,1104,1106,1108,1111,1113,1116,1118],{"class":674,"line":1105},19,[672,1107,1010],{"class":752},[672,1109,1110],{"class":745}," catch",[672,1112,923],{"class":825},[672,1114,1115],{"class":756},"error",[672,1117,943],{"class":825},[672,1119,819],{"class":752},[672,1121,1123,1125,1127,1129,1131,1133,1136,1139,1142,1145,1148,1151,1153,1155,1158,1160,1162],{"class":674,"line":1122},20,[672,1124,1031],{"class":756},[672,1126,857],{"class":752},[672,1128,1115],{"class":812},[672,1130,816],{"class":825},[672,1132,1115],{"class":756},[672,1134,1135],{"class":752}," instanceof",[672,1137,1138],{"class":678}," Error",[672,1140,1141],{"class":752}," ?",[672,1143,1144],{"class":756}," error",[672,1146,1147],{"class":752}," :",[672,1149,1150],{"class":752}," new",[672,1152,1138],{"class":812},[672,1154,816],{"class":825},[672,1156,1157],{"class":812},"String",[672,1159,816],{"class":825},[672,1161,1115],{"class":756},[672,1163,1164],{"class":825},")))\n",[672,1166,1168,1170,1172,1174,1176,1178,1180,1182,1184,1186,1188,1190],{"class":674,"line":1167},21,[672,1169,1031],{"class":756},[672,1171,857],{"class":752},[672,1173,1036],{"class":812},[672,1175,816],{"class":825},[672,1177,1041],{"class":752},[672,1179,1089],{"class":825},[672,1181,829],{"class":752},[672,1183,766],{"class":752},[672,1185,1115],{"class":681},[672,1187,844],{"class":752},[672,1189,760],{"class":752},[672,1191,877],{"class":825},[672,1193,1195,1198],{"class":674,"line":1194},22,[672,1196,1197],{"class":745},"      throw",[672,1199,1200],{"class":756}," error\n",[672,1202,1204,1206,1209],{"class":674,"line":1203},23,[672,1205,1010],{"class":752},[672,1207,1208],{"class":745}," finally",[672,1210,914],{"class":752},[672,1212,1214,1216,1218,1221],{"class":674,"line":1213},24,[672,1215,1031],{"class":756},[672,1217,857],{"class":752},[672,1219,1220],{"class":812},"emit",[672,1222,1223],{"class":825},"()\n",[672,1225,1227],{"class":674,"line":1226},25,[672,1228,1229],{"class":752},"    }\n",[672,1231,1233],{"class":674,"line":1232},26,[672,1234,1235],{"class":752},"  }\n",[672,1237,1239],{"class":674,"line":1238},27,[672,1240,1241],{"class":752},"}\n",[531,1243,1244,1245,626,1248,1250],{},"If you process the whole batch as one logical unit, use a ",[535,1246,1247],{},"single",[545,1249,555],{}," per handler invocation with batch metadata instead of one logger per record.",[602,1252,1254,1255],{"id":1253},"stdout-and-silent","Stdout and ",[545,1256,1257],{},"silent",[531,1259,1260,1261,1264,1265,1268,1269,1272,1273,857],{},"Many teams ingest Lambda logs from ",[535,1262,1263],{},"CloudWatch"," via stdout. If you use a ",[535,1266,1267],{},"drain adapter"," (OTLP, Datadog, Axiom, etc.) and want JSON or platform-specific formatting without duplicate console noise, set ",[545,1270,1271],{},"silent: true"," in production—see ",[540,1274,500],{"href":1275},"\u002Freference\u002Fconfiguration#silent-mode",[662,1277,1279],{"className":735,"code":1278,"filename":737,"language":738,"meta":668,"style":668},"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",[545,1280,1281,1301,1319,1323,1331,1352,1381,1395],{"__ignoreMap":668},[672,1282,1283,1285,1287,1290,1292,1294,1296,1299],{"class":674,"line":675},[672,1284,746],{"class":745},[672,1286,753],{"class":752},[672,1288,1289],{"class":756}," createAxiomDrain",[672,1291,760],{"class":752},[672,1293,763],{"class":745},[672,1295,766],{"class":752},[672,1297,1298],{"class":681},"evlog\u002Faxiom",[672,1300,772],{"class":752},[672,1302,1303,1305,1307,1309,1311,1313,1315,1317],{"class":674,"line":775},[672,1304,746],{"class":745},[672,1306,753],{"class":752},[672,1308,782],{"class":756},[672,1310,760],{"class":752},[672,1312,763],{"class":745},[672,1314,766],{"class":752},[672,1316,797],{"class":681},[672,1318,772],{"class":752},[672,1320,1321],{"class":674,"line":802},[672,1322,806],{"emptyLinePlaceholder":805},[672,1324,1325,1327,1329],{"class":674,"line":809},[672,1326,813],{"class":812},[672,1328,816],{"class":756},[672,1330,819],{"class":752},[672,1332,1333,1335,1337,1339,1341,1343,1345,1347,1349],{"class":674,"line":822},[672,1334,826],{"class":825},[672,1336,829],{"class":752},[672,1338,753],{"class":752},[672,1340,834],{"class":825},[672,1342,829],{"class":752},[672,1344,766],{"class":752},[672,1346,841],{"class":681},[672,1348,844],{"class":752},[672,1350,1351],{"class":752}," },\n",[672,1353,1354,1357,1359,1361,1363,1365,1367,1369,1372,1374,1377,1379],{"class":674,"line":871},[672,1355,1356],{"class":825},"  silent",[672,1358,829],{"class":752},[672,1360,854],{"class":756},[672,1362,857],{"class":752},[672,1364,860],{"class":756},[672,1366,857],{"class":752},[672,1368,865],{"class":756},[672,1370,1371],{"class":752},"===",[672,1373,766],{"class":752},[672,1375,1376],{"class":681},"production",[672,1378,844],{"class":752},[672,1380,981],{"class":752},[672,1382,1383,1386,1388,1390,1393],{"class":674,"line":880},[672,1384,1385],{"class":825},"  drain",[672,1387,829],{"class":752},[672,1389,1289],{"class":812},[672,1391,1392],{"class":756},"()",[672,1394,981],{"class":752},[672,1396,1397,1399],{"class":674,"line":885},[672,1398,874],{"class":752},[672,1400,877],{"class":756},[1402,1403,1406,1407,1409,1410,1413],"callout",{"color":1404,"icon":1405},"warning","i-lucide-alert-triangle","If ",[545,1408,1257],{}," is enabled without a ",[545,1411,1412],{},"drain",", events may not be visible anywhere. See the configuration docs for details.",[602,1415,1417],{"id":1416},"error-handling","Error handling",[531,1419,1420,1421,1424,1425,1428,1429,1428,1432,1435],{},"Use ",[545,1422,1423],{},"createError"," where you want structured fields (",[545,1426,1427],{},"why",", ",[545,1430,1431],{},"fix",[545,1433,1434],{},"link","). Map failures to your Lambda return or rethrow so SQS retry\u002FDLQ behavior stays correct—evlog does not replace AWS error semantics.",[662,1437,1439],{"className":735,"code":1438,"filename":737,"language":738,"meta":668,"style":668},"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",[545,1440,1441,1460,1464,1475,1491,1504,1520,1536],{"__ignoreMap":668},[672,1442,1443,1445,1447,1450,1452,1454,1456,1458],{"class":674,"line":675},[672,1444,746],{"class":745},[672,1446,753],{"class":752},[672,1448,1449],{"class":756}," createError",[672,1451,760],{"class":752},[672,1453,763],{"class":745},[672,1455,766],{"class":752},[672,1457,797],{"class":681},[672,1459,772],{"class":752},[672,1461,1462],{"class":674,"line":775},[672,1463,806],{"emptyLinePlaceholder":805},[672,1465,1466,1469,1471,1473],{"class":674,"line":802},[672,1467,1468],{"class":745},"throw",[672,1470,1449],{"class":812},[672,1472,816],{"class":756},[672,1474,819],{"class":752},[672,1476,1477,1480,1482,1484,1487,1489],{"class":674,"line":809},[672,1478,1479],{"class":825},"  message",[672,1481,829],{"class":752},[672,1483,766],{"class":752},[672,1485,1486],{"class":681},"Invalid payload",[672,1488,844],{"class":752},[672,1490,981],{"class":752},[672,1492,1493,1496,1498,1502],{"class":674,"line":822},[672,1494,1495],{"class":825},"  status",[672,1497,829],{"class":752},[672,1499,1501],{"class":1500},"sbssI"," 400",[672,1503,981],{"class":752},[672,1505,1506,1509,1511,1513,1516,1518],{"class":674,"line":871},[672,1507,1508],{"class":825},"  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