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Install",[667,668,669,694,708,722],"code-group",{},[670,671,677],"pre",{"className":672,"code":673,"filename":674,"language":675,"meta":676,"style":676},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","pnpm add evlog\n","pnpm","bash","",[553,678,679],{"__ignoreMap":676},[680,681,684,687,691],"span",{"class":682,"line":683},"line",1,[680,685,674],{"class":686},"sBMFI",[680,688,690],{"class":689},"sfazB"," add",[680,692,693],{"class":689}," evlog\n",[670,695,698],{"className":672,"code":696,"filename":697,"language":675,"meta":676,"style":676},"bun add evlog\n","bun",[553,699,700],{"__ignoreMap":676},[680,701,702,704,706],{"class":682,"line":683},[680,703,697],{"class":686},[680,705,690],{"class":689},[680,707,693],{"class":689},[670,709,712],{"className":672,"code":710,"filename":711,"language":675,"meta":676,"style":676},"yarn add evlog\n","yarn",[553,713,714],{"__ignoreMap":676},[680,715,716,718,720],{"class":682,"line":683},[680,717,711],{"class":686},[680,719,690],{"class":689},[680,721,693],{"class":689},[670,723,726],{"className":672,"code":724,"filename":725,"language":675,"meta":676,"style":676},"npm install evlog\n","npm",[553,727,728],{"__ignoreMap":676},[680,729,730,732,735],{"class":682,"line":683},[680,731,725],{"class":686},[680,733,734],{"class":689}," install",[680,736,693],{"class":689},[662,738,740],{"id":739},"_2-initialize-once-log-per-invocation","2. Initialize once, log per invocation",[670,742,747],{"className":743,"code":744,"filename":745,"language":746,"meta":676,"style":676},"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",[553,748,749,781,808,815,828,877,886,891,923,954,972,990,1013,1021,1026,1034,1075,1082,1111,1128,1173,1200,1209,1219,1232,1238,1244],{"__ignoreMap":676},[680,750,751,755,758,762,766,769,772,775,778],{"class":682,"line":683},[680,752,754],{"class":753},"s7zQu","import",[680,756,757],{"class":753}," type",[680,759,761],{"class":760},"sMK4o"," {",[680,763,765],{"class":764},"sTEyZ"," SQSEvent",[680,767,768],{"class":760}," }",[680,770,771],{"class":753}," from",[680,773,774],{"class":760}," '",[680,776,777],{"class":689},"aws-lambda",[680,779,780],{"class":760},"'\n",[680,782,784,786,788,791,794,797,799,801,803,806],{"class":682,"line":783},2,[680,785,754],{"class":753},[680,787,761],{"class":760},[680,789,790],{"class":764}," initLogger",[680,792,793],{"class":760},",",[680,795,796],{"class":764}," createLogger",[680,798,768],{"class":760},[680,800,771],{"class":753},[680,802,774],{"class":760},[680,804,805],{"class":689},"evlog",[680,807,780],{"class":760},[680,809,811],{"class":682,"line":810},3,[680,812,814],{"emptyLinePlaceholder":813},true,"\n",[680,816,818,822,825],{"class":682,"line":817},4,[680,819,821],{"class":820},"s2Zo4","initLogger",[680,823,824],{"class":764},"(",[680,826,827],{"class":760},"{\n",[680,829,831,835,838,840,843,845,847,850,853,855,858,860,863,866,869,871,874],{"class":682,"line":830},5,[680,832,834],{"class":833},"swJcz","  env",[680,836,837],{"class":760},":",[680,839,761],{"class":760},[680,841,842],{"class":833}," service",[680,844,837],{"class":760},[680,846,774],{"class":760},[680,848,849],{"class":689},"sqs-consumer",[680,851,852],{"class":760},"'",[680,854,793],{"class":760},[680,856,857],{"class":833}," environment",[680,859,837],{"class":760},[680,861,862],{"class":764}," process",[680,864,865],{"class":760},".",[680,867,868],{"class":764},"env",[680,870,865],{"class":760},[680,872,873],{"class":764},"NODE_ENV ",[680,875,876],{"class":760},"},\n",[680,878,880,883],{"class":682,"line":879},6,[680,881,882],{"class":760},"}",[680,884,885],{"class":764},")\n",[680,887,889],{"class":682,"line":888},7,[680,890,814],{"emptyLinePlaceholder":813},[680,892,894,897,901,904,907,909,913,915,917,920],{"class":682,"line":893},8,[680,895,896],{"class":753},"export",[680,898,900],{"class":899},"spNyl"," async",[680,902,903],{"class":899}," function",[680,905,906],{"class":820}," handler",[680,908,824],{"class":760},[680,910,912],{"class":911},"sHdIc","event",[680,914,837],{"class":760},[680,916,765],{"class":686},[680,918,919],{"class":760},")",[680,921,922],{"class":760}," {\n",[680,924,926,929,932,935,938,941,944,946,949,952],{"class":682,"line":925},9,[680,927,928],{"class":753},"  for",[680,930,931],{"class":833}," (",[680,933,934],{"class":899},"const",[680,936,937],{"class":764}," record",[680,939,940],{"class":760}," of",[680,942,943],{"class":764}," event",[680,945,865],{"class":760},[680,947,948],{"class":764},"Records",[680,950,951],{"class":833},") ",[680,953,827],{"class":760},[680,955,957,960,963,966,968,970],{"class":682,"line":956},10,[680,958,959],{"class":899},"    const",[680,961,962],{"class":764}," log",[680,964,965],{"class":760}," =",[680,967,796],{"class":820},[680,969,824],{"class":833},[680,971,827],{"class":760},[680,973,975,978,980,982,984,987],{"class":682,"line":974},11,[680,976,977],{"class":833},"      messageId",[680,979,837],{"class":760},[680,981,937],{"class":764},[680,983,865],{"class":760},[680,985,986],{"class":764},"messageId",[680,988,989],{"class":760},",\n",[680,991,993,996,998,1000,1002,1005,1008,1011],{"class":682,"line":992},12,[680,994,995],{"class":833},"      approximateReceiveCount",[680,997,837],{"class":760},[680,999,937],{"class":764},[680,1001,865],{"class":760},[680,1003,1004],{"class":764},"attributes",[680,1006,1007],{"class":760},"?.",[680,1009,1010],{"class":764},"ApproximateReceiveCount",[680,1012,989],{"class":760},[680,1014,1016,1019],{"class":682,"line":1015},13,[680,1017,1018],{"class":760},"    }",[680,1020,885],{"class":833},[680,1022,1024],{"class":682,"line":1023},14,[680,1025,814],{"emptyLinePlaceholder":813},[680,1027,1029,1032],{"class":682,"line":1028},15,[680,1030,1031],{"class":753},"    try",[680,1033,922],{"class":760},[680,1035,1037,1040,1042,1045,1047,1050,1053,1055,1057,1060,1062,1064,1066,1069,1071,1073],{"class":682,"line":1036},16,[680,1038,1039],{"class":764},"      log",[680,1041,865],{"class":760},[680,1043,1044],{"class":820},"set",[680,1046,824],{"class":833},[680,1048,1049],{"class":760},"{",[680,1051,1052],{"class":833}," queue",[680,1054,837],{"class":760},[680,1056,761],{"class":760},[680,1058,1059],{"class":833}," name",[680,1061,837],{"class":760},[680,1063,937],{"class":764},[680,1065,865],{"class":760},[680,1067,1068],{"class":764},"eventSourceARN",[680,1070,768],{"class":760},[680,1072,768],{"class":760},[680,1074,885],{"class":833},[680,1076,1078],{"class":682,"line":1077},17,[680,1079,1081],{"class":1080},"sHwdD","      \u002F\u002F … parse record.body and process the message\n",[680,1083,1085,1087,1089,1091,1093,1095,1098,1100,1102,1105,1107,1109],{"class":682,"line":1084},18,[680,1086,1039],{"class":764},[680,1088,865],{"class":760},[680,1090,1044],{"class":820},[680,1092,824],{"class":833},[680,1094,1049],{"class":760},[680,1096,1097],{"class":833}," status",[680,1099,837],{"class":760},[680,1101,774],{"class":760},[680,1103,1104],{"class":689},"ok",[680,1106,852],{"class":760},[680,1108,768],{"class":760},[680,1110,885],{"class":833},[680,1112,1114,1116,1119,1121,1124,1126],{"class":682,"line":1113},19,[680,1115,1018],{"class":760},[680,1117,1118],{"class":753}," catch",[680,1120,931],{"class":833},[680,1122,1123],{"class":764},"error",[680,1125,951],{"class":833},[680,1127,827],{"class":760},[680,1129,1131,1133,1135,1137,1139,1141,1144,1147,1150,1153,1156,1159,1161,1163,1166,1168,1170],{"class":682,"line":1130},20,[680,1132,1039],{"class":764},[680,1134,865],{"class":760},[680,1136,1123],{"class":820},[680,1138,824],{"class":833},[680,1140,1123],{"class":764},[680,1142,1143],{"class":760}," instanceof",[680,1145,1146],{"class":686}," Error",[680,1148,1149],{"class":760}," ?",[680,1151,1152],{"class":764}," error",[680,1154,1155],{"class":760}," :",[680,1157,1158],{"class":760}," new",[680,1160,1146],{"class":820},[680,1162,824],{"class":833},[680,1164,1165],{"class":820},"String",[680,1167,824],{"class":833},[680,1169,1123],{"class":764},[680,1171,1172],{"class":833},")))\n",[680,1174,1176,1178,1180,1182,1184,1186,1188,1190,1192,1194,1196,1198],{"class":682,"line":1175},21,[680,1177,1039],{"class":764},[680,1179,865],{"class":760},[680,1181,1044],{"class":820},[680,1183,824],{"class":833},[680,1185,1049],{"class":760},[680,1187,1097],{"class":833},[680,1189,837],{"class":760},[680,1191,774],{"class":760},[680,1193,1123],{"class":689},[680,1195,852],{"class":760},[680,1197,768],{"class":760},[680,1199,885],{"class":833},[680,1201,1203,1206],{"class":682,"line":1202},22,[680,1204,1205],{"class":753},"      throw",[680,1207,1208],{"class":764}," error\n",[680,1210,1212,1214,1217],{"class":682,"line":1211},23,[680,1213,1018],{"class":760},[680,1215,1216],{"class":753}," finally",[680,1218,922],{"class":760},[680,1220,1222,1224,1226,1229],{"class":682,"line":1221},24,[680,1223,1039],{"class":764},[680,1225,865],{"class":760},[680,1227,1228],{"class":820},"emit",[680,1230,1231],{"class":833},"()\n",[680,1233,1235],{"class":682,"line":1234},25,[680,1236,1237],{"class":760},"    }\n",[680,1239,1241],{"class":682,"line":1240},26,[680,1242,1243],{"class":760},"  }\n",[680,1245,1247],{"class":682,"line":1246},27,[680,1248,1249],{"class":760},"}\n",[539,1251,1252,1253,634,1256,1258],{},"If you process the whole batch as one logical unit, use a ",[543,1254,1255],{},"single",[553,1257,563],{}," per handler invocation with batch metadata instead of one logger per record.",[610,1260,1262,1263],{"id":1261},"stdout-and-silent","Stdout and ",[553,1264,1265],{},"silent",[539,1267,1268,1269,1272,1273,1276,1277,1280,1281,865],{},"Many teams ingest Lambda logs from ",[543,1270,1271],{},"CloudWatch"," via stdout. If you use a ",[543,1274,1275],{},"drain adapter"," (OTLP, Datadog, Axiom, etc.) and want JSON or platform-specific formatting without duplicate console noise, set ",[553,1278,1279],{},"silent: true"," in production. See ",[548,1282,504],{"href":1283},"\u002Freference\u002Fconfiguration#silence-the-terminal",[670,1285,1287],{"className":743,"code":1286,"filename":745,"language":746,"meta":676,"style":676},"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",[553,1288,1289,1309,1327,1331,1339,1360,1389,1403],{"__ignoreMap":676},[680,1290,1291,1293,1295,1298,1300,1302,1304,1307],{"class":682,"line":683},[680,1292,754],{"class":753},[680,1294,761],{"class":760},[680,1296,1297],{"class":764}," createAxiomDrain",[680,1299,768],{"class":760},[680,1301,771],{"class":753},[680,1303,774],{"class":760},[680,1305,1306],{"class":689},"evlog\u002Faxiom",[680,1308,780],{"class":760},[680,1310,1311,1313,1315,1317,1319,1321,1323,1325],{"class":682,"line":783},[680,1312,754],{"class":753},[680,1314,761],{"class":760},[680,1316,790],{"class":764},[680,1318,768],{"class":760},[680,1320,771],{"class":753},[680,1322,774],{"class":760},[680,1324,805],{"class":689},[680,1326,780],{"class":760},[680,1328,1329],{"class":682,"line":810},[680,1330,814],{"emptyLinePlaceholder":813},[680,1332,1333,1335,1337],{"class":682,"line":817},[680,1334,821],{"class":820},[680,1336,824],{"class":764},[680,1338,827],{"class":760},[680,1340,1341,1343,1345,1347,1349,1351,1353,1355,1357],{"class":682,"line":830},[680,1342,834],{"class":833},[680,1344,837],{"class":760},[680,1346,761],{"class":760},[680,1348,842],{"class":833},[680,1350,837],{"class":760},[680,1352,774],{"class":760},[680,1354,849],{"class":689},[680,1356,852],{"class":760},[680,1358,1359],{"class":760}," },\n",[680,1361,1362,1365,1367,1369,1371,1373,1375,1377,1380,1382,1385,1387],{"class":682,"line":879},[680,1363,1364],{"class":833},"  silent",[680,1366,837],{"class":760},[680,1368,862],{"class":764},[680,1370,865],{"class":760},[680,1372,868],{"class":764},[680,1374,865],{"class":760},[680,1376,873],{"class":764},[680,1378,1379],{"class":760},"===",[680,1381,774],{"class":760},[680,1383,1384],{"class":689},"production",[680,1386,852],{"class":760},[680,1388,989],{"class":760},[680,1390,1391,1394,1396,1398,1401],{"class":682,"line":888},[680,1392,1393],{"class":833},"  drain",[680,1395,837],{"class":760},[680,1397,1297],{"class":820},[680,1399,1400],{"class":764},"()",[680,1402,989],{"class":760},[680,1404,1405,1407],{"class":682,"line":893},[680,1406,882],{"class":760},[680,1408,885],{"class":764},[1410,1411,1414,1415,1417,1418,1421],"callout",{"color":1412,"icon":1413},"warning","i-lucide-alert-triangle","If ",[553,1416,1265],{}," is enabled without a ",[553,1419,1420],{},"drain",", events may not be visible anywhere. See the configuration docs for details.",[610,1423,1425],{"id":1424},"error-handling","Error handling",[539,1427,1428,1429,1432,1433,1436,1437,1436,1440,1443],{},"Use ",[553,1430,1431],{},"createError"," where you want structured fields (",[553,1434,1435],{},"why",", ",[553,1438,1439],{},"fix",[553,1441,1442],{},"link","). Map failures to your Lambda return or rethrow so SQS retry\u002FDLQ behavior stays correct. evlog does not replace AWS error semantics.",[670,1445,1447],{"className":743,"code":1446,"filename":745,"language":746,"meta":676,"style":676},"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",[553,1448,1449,1468,1472,1483,1499,1512,1528,1544],{"__ignoreMap":676},[680,1450,1451,1453,1455,1458,1460,1462,1464,1466],{"class":682,"line":683},[680,1452,754],{"class":753},[680,1454,761],{"class":760},[680,1456,1457],{"class":764}," createError",[680,1459,768],{"class":760},[680,1461,771],{"class":753},[680,1463,774],{"class":760},[680,1465,805],{"class":689},[680,1467,780],{"class":760},[680,1469,1470],{"class":682,"line":783},[680,1471,814],{"emptyLinePlaceholder":813},[680,1473,1474,1477,1479,1481],{"class":682,"line":810},[680,1475,1476],{"class":753},"throw",[680,1478,1457],{"class":820},[680,1480,824],{"class":764},[680,1482,827],{"class":760},[680,1484,1485,1488,1490,1492,1495,1497],{"class":682,"line":817},[680,1486,1487],{"class":833},"  message",[680,1489,837],{"class":760},[680,1491,774],{"class":760},[680,1493,1494],{"class":689},"Invalid payload",[680,1496,852],{"class":760},[680,1498,989],{"class":760},[680,1500,1501,1504,1506,1510],{"class":682,"line":830},[680,1502,1503],{"class":833},"  status",[680,1505,837],{"class":760},[680,1507,1509],{"class":1508},"sbssI"," 400",[680,1511,989],{"class":760},[680,1513,1514,1517,1519,1521,1524,1526],{"class":682,"line":879},[680,1515,1516],{"class":833},"  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