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Install",[634,635,636,661,675,689],"code-group",{},[637,638,644],"pre",{"className":639,"code":640,"filename":641,"language":642,"meta":643,"style":643},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","pnpm add evlog\n","pnpm","bash","",[520,645,646],{"__ignoreMap":643},[647,648,651,654,658],"span",{"class":649,"line":650},"line",1,[647,652,641],{"class":653},"sBMFI",[647,655,657],{"class":656},"sfazB"," add",[647,659,660],{"class":656}," evlog\n",[637,662,665],{"className":639,"code":663,"filename":664,"language":642,"meta":643,"style":643},"bun add evlog\n","bun",[520,666,667],{"__ignoreMap":643},[647,668,669,671,673],{"class":649,"line":650},[647,670,664],{"class":653},[647,672,657],{"class":656},[647,674,660],{"class":656},[637,676,679],{"className":639,"code":677,"filename":678,"language":642,"meta":643,"style":643},"yarn add evlog\n","yarn",[520,680,681],{"__ignoreMap":643},[647,682,683,685,687],{"class":649,"line":650},[647,684,678],{"class":653},[647,686,657],{"class":656},[647,688,660],{"class":656},[637,690,693],{"className":639,"code":691,"filename":692,"language":642,"meta":643,"style":643},"npm install evlog\n","npm",[520,694,695],{"__ignoreMap":643},[647,696,697,699,702],{"class":649,"line":650},[647,698,692],{"class":653},[647,700,701],{"class":656}," install",[647,703,660],{"class":656},[629,705,707],{"id":706},"_2-initialize-once-log-per-invocation","2. Initialize once, log per invocation",[637,709,714],{"className":710,"code":711,"filename":712,"language":713,"meta":643,"style":643},"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",[520,715,716,748,775,782,795,844,853,858,890,921,939,957,980,988,993,1001,1042,1049,1078,1095,1140,1167,1176,1186,1199,1205,1211],{"__ignoreMap":643},[647,717,718,722,725,729,733,736,739,742,745],{"class":649,"line":650},[647,719,721],{"class":720},"s7zQu","import",[647,723,724],{"class":720}," type",[647,726,728],{"class":727},"sMK4o"," {",[647,730,732],{"class":731},"sTEyZ"," SQSEvent",[647,734,735],{"class":727}," }",[647,737,738],{"class":720}," from",[647,740,741],{"class":727}," '",[647,743,744],{"class":656},"aws-lambda",[647,746,747],{"class":727},"'\n",[647,749,751,753,755,758,761,764,766,768,770,773],{"class":649,"line":750},2,[647,752,721],{"class":720},[647,754,728],{"class":727},[647,756,757],{"class":731}," initLogger",[647,759,760],{"class":727},",",[647,762,763],{"class":731}," createLogger",[647,765,735],{"class":727},[647,767,738],{"class":720},[647,769,741],{"class":727},[647,771,772],{"class":656},"evlog",[647,774,747],{"class":727},[647,776,778],{"class":649,"line":777},3,[647,779,781],{"emptyLinePlaceholder":780},true,"\n",[647,783,785,789,792],{"class":649,"line":784},4,[647,786,788],{"class":787},"s2Zo4","initLogger",[647,790,791],{"class":731},"(",[647,793,794],{"class":727},"{\n",[647,796,798,802,805,807,810,812,814,817,820,822,825,827,830,833,836,838,841],{"class":649,"line":797},5,[647,799,801],{"class":800},"swJcz","  env",[647,803,804],{"class":727},":",[647,806,728],{"class":727},[647,808,809],{"class":800}," service",[647,811,804],{"class":727},[647,813,741],{"class":727},[647,815,816],{"class":656},"sqs-consumer",[647,818,819],{"class":727},"'",[647,821,760],{"class":727},[647,823,824],{"class":800}," environment",[647,826,804],{"class":727},[647,828,829],{"class":731}," process",[647,831,832],{"class":727},".",[647,834,835],{"class":731},"env",[647,837,832],{"class":727},[647,839,840],{"class":731},"NODE_ENV ",[647,842,843],{"class":727},"},\n",[647,845,847,850],{"class":649,"line":846},6,[647,848,849],{"class":727},"}",[647,851,852],{"class":731},")\n",[647,854,856],{"class":649,"line":855},7,[647,857,781],{"emptyLinePlaceholder":780},[647,859,861,864,868,871,874,876,880,882,884,887],{"class":649,"line":860},8,[647,862,863],{"class":720},"export",[647,865,867],{"class":866},"spNyl"," async",[647,869,870],{"class":866}," function",[647,872,873],{"class":787}," handler",[647,875,791],{"class":727},[647,877,879],{"class":878},"sHdIc","event",[647,881,804],{"class":727},[647,883,732],{"class":653},[647,885,886],{"class":727},")",[647,888,889],{"class":727}," {\n",[647,891,893,896,899,902,905,908,911,913,916,919],{"class":649,"line":892},9,[647,894,895],{"class":720},"  for",[647,897,898],{"class":800}," (",[647,900,901],{"class":866},"const",[647,903,904],{"class":731}," record",[647,906,907],{"class":727}," of",[647,909,910],{"class":731}," event",[647,912,832],{"class":727},[647,914,915],{"class":731},"Records",[647,917,918],{"class":800},") ",[647,920,794],{"class":727},[647,922,924,927,930,933,935,937],{"class":649,"line":923},10,[647,925,926],{"class":866},"    const",[647,928,929],{"class":731}," log",[647,931,932],{"class":727}," =",[647,934,763],{"class":787},[647,936,791],{"class":800},[647,938,794],{"class":727},[647,940,942,945,947,949,951,954],{"class":649,"line":941},11,[647,943,944],{"class":800},"      messageId",[647,946,804],{"class":727},[647,948,904],{"class":731},[647,950,832],{"class":727},[647,952,953],{"class":731},"messageId",[647,955,956],{"class":727},",\n",[647,958,960,963,965,967,969,972,975,978],{"class":649,"line":959},12,[647,961,962],{"class":800},"      approximateReceiveCount",[647,964,804],{"class":727},[647,966,904],{"class":731},[647,968,832],{"class":727},[647,970,971],{"class":731},"attributes",[647,973,974],{"class":727},"?.",[647,976,977],{"class":731},"ApproximateReceiveCount",[647,979,956],{"class":727},[647,981,983,986],{"class":649,"line":982},13,[647,984,985],{"class":727},"    }",[647,987,852],{"class":800},[647,989,991],{"class":649,"line":990},14,[647,992,781],{"emptyLinePlaceholder":780},[647,994,996,999],{"class":649,"line":995},15,[647,997,998],{"class":720},"    try",[647,1000,889],{"class":727},[647,1002,1004,1007,1009,1012,1014,1017,1020,1022,1024,1027,1029,1031,1033,1036,1038,1040],{"class":649,"line":1003},16,[647,1005,1006],{"class":731},"      log",[647,1008,832],{"class":727},[647,1010,1011],{"class":787},"set",[647,1013,791],{"class":800},[647,1015,1016],{"class":727},"{",[647,1018,1019],{"class":800}," queue",[647,1021,804],{"class":727},[647,1023,728],{"class":727},[647,1025,1026],{"class":800}," name",[647,1028,804],{"class":727},[647,1030,904],{"class":731},[647,1032,832],{"class":727},[647,1034,1035],{"class":731},"eventSourceARN",[647,1037,735],{"class":727},[647,1039,735],{"class":727},[647,1041,852],{"class":800},[647,1043,1045],{"class":649,"line":1044},17,[647,1046,1048],{"class":1047},"sHwdD","      \u002F\u002F … parse record.body and process the message\n",[647,1050,1052,1054,1056,1058,1060,1062,1065,1067,1069,1072,1074,1076],{"class":649,"line":1051},18,[647,1053,1006],{"class":731},[647,1055,832],{"class":727},[647,1057,1011],{"class":787},[647,1059,791],{"class":800},[647,1061,1016],{"class":727},[647,1063,1064],{"class":800}," status",[647,1066,804],{"class":727},[647,1068,741],{"class":727},[647,1070,1071],{"class":656},"ok",[647,1073,819],{"class":727},[647,1075,735],{"class":727},[647,1077,852],{"class":800},[647,1079,1081,1083,1086,1088,1091,1093],{"class":649,"line":1080},19,[647,1082,985],{"class":727},[647,1084,1085],{"class":720}," catch",[647,1087,898],{"class":800},[647,1089,1090],{"class":731},"error",[647,1092,918],{"class":800},[647,1094,794],{"class":727},[647,1096,1098,1100,1102,1104,1106,1108,1111,1114,1117,1120,1123,1126,1128,1130,1133,1135,1137],{"class":649,"line":1097},20,[647,1099,1006],{"class":731},[647,1101,832],{"class":727},[647,1103,1090],{"class":787},[647,1105,791],{"class":800},[647,1107,1090],{"class":731},[647,1109,1110],{"class":727}," instanceof",[647,1112,1113],{"class":653}," Error",[647,1115,1116],{"class":727}," ?",[647,1118,1119],{"class":731}," error",[647,1121,1122],{"class":727}," :",[647,1124,1125],{"class":727}," new",[647,1127,1113],{"class":787},[647,1129,791],{"class":800},[647,1131,1132],{"class":787},"String",[647,1134,791],{"class":800},[647,1136,1090],{"class":731},[647,1138,1139],{"class":800},")))\n",[647,1141,1143,1145,1147,1149,1151,1153,1155,1157,1159,1161,1163,1165],{"class":649,"line":1142},21,[647,1144,1006],{"class":731},[647,1146,832],{"class":727},[647,1148,1011],{"class":787},[647,1150,791],{"class":800},[647,1152,1016],{"class":727},[647,1154,1064],{"class":800},[647,1156,804],{"class":727},[647,1158,741],{"class":727},[647,1160,1090],{"class":656},[647,1162,819],{"class":727},[647,1164,735],{"class":727},[647,1166,852],{"class":800},[647,1168,1170,1173],{"class":649,"line":1169},22,[647,1171,1172],{"class":720},"      throw",[647,1174,1175],{"class":731}," error\n",[647,1177,1179,1181,1184],{"class":649,"line":1178},23,[647,1180,985],{"class":727},[647,1182,1183],{"class":720}," finally",[647,1185,889],{"class":727},[647,1187,1189,1191,1193,1196],{"class":649,"line":1188},24,[647,1190,1006],{"class":731},[647,1192,832],{"class":727},[647,1194,1195],{"class":787},"emit",[647,1197,1198],{"class":800},"()\n",[647,1200,1202],{"class":649,"line":1201},25,[647,1203,1204],{"class":727},"    }\n",[647,1206,1208],{"class":649,"line":1207},26,[647,1209,1210],{"class":727},"  }\n",[647,1212,1214],{"class":649,"line":1213},27,[647,1215,1216],{"class":727},"}\n",[506,1218,1219,1220,601,1223,1225],{},"If you process the whole batch as one logical unit, use a ",[510,1221,1222],{},"single",[520,1224,530],{}," per handler invocation with batch metadata instead of one logger per record.",[577,1227,1229,1230],{"id":1228},"stdout-and-silent","Stdout and ",[520,1231,1232],{},"silent",[506,1234,1235,1236,1239,1240,1243,1244,1247,1248,832],{},"Many teams ingest Lambda logs from ",[510,1237,1238],{},"CloudWatch"," via stdout. If you use a ",[510,1241,1242],{},"drain adapter"," (OTLP, Datadog, Axiom, etc.) and want JSON or platform-specific formatting without duplicate console noise, set ",[520,1245,1246],{},"silent: true"," in production—see ",[515,1249,475],{"href":1250},"\u002Freference\u002Fconfiguration#silent-mode",[637,1252,1254],{"className":710,"code":1253,"filename":712,"language":713,"meta":643,"style":643},"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",[520,1255,1256,1276,1294,1298,1306,1327,1356,1370],{"__ignoreMap":643},[647,1257,1258,1260,1262,1265,1267,1269,1271,1274],{"class":649,"line":650},[647,1259,721],{"class":720},[647,1261,728],{"class":727},[647,1263,1264],{"class":731}," createAxiomDrain",[647,1266,735],{"class":727},[647,1268,738],{"class":720},[647,1270,741],{"class":727},[647,1272,1273],{"class":656},"evlog\u002Faxiom",[647,1275,747],{"class":727},[647,1277,1278,1280,1282,1284,1286,1288,1290,1292],{"class":649,"line":750},[647,1279,721],{"class":720},[647,1281,728],{"class":727},[647,1283,757],{"class":731},[647,1285,735],{"class":727},[647,1287,738],{"class":720},[647,1289,741],{"class":727},[647,1291,772],{"class":656},[647,1293,747],{"class":727},[647,1295,1296],{"class":649,"line":777},[647,1297,781],{"emptyLinePlaceholder":780},[647,1299,1300,1302,1304],{"class":649,"line":784},[647,1301,788],{"class":787},[647,1303,791],{"class":731},[647,1305,794],{"class":727},[647,1307,1308,1310,1312,1314,1316,1318,1320,1322,1324],{"class":649,"line":797},[647,1309,801],{"class":800},[647,1311,804],{"class":727},[647,1313,728],{"class":727},[647,1315,809],{"class":800},[647,1317,804],{"class":727},[647,1319,741],{"class":727},[647,1321,816],{"class":656},[647,1323,819],{"class":727},[647,1325,1326],{"class":727}," },\n",[647,1328,1329,1332,1334,1336,1338,1340,1342,1344,1347,1349,1352,1354],{"class":649,"line":846},[647,1330,1331],{"class":800},"  silent",[647,1333,804],{"class":727},[647,1335,829],{"class":731},[647,1337,832],{"class":727},[647,1339,835],{"class":731},[647,1341,832],{"class":727},[647,1343,840],{"class":731},[647,1345,1346],{"class":727},"===",[647,1348,741],{"class":727},[647,1350,1351],{"class":656},"production",[647,1353,819],{"class":727},[647,1355,956],{"class":727},[647,1357,1358,1361,1363,1365,1368],{"class":649,"line":855},[647,1359,1360],{"class":800},"  drain",[647,1362,804],{"class":727},[647,1364,1264],{"class":787},[647,1366,1367],{"class":731},"()",[647,1369,956],{"class":727},[647,1371,1372,1374],{"class":649,"line":860},[647,1373,849],{"class":727},[647,1375,852],{"class":731},[1377,1378,1381,1382,1384,1385,1388],"callout",{"color":1379,"icon":1380},"warning","i-lucide-alert-triangle","If ",[520,1383,1232],{}," is enabled without a ",[520,1386,1387],{},"drain",", events may not be visible anywhere. See the configuration docs for details.",[577,1390,1392],{"id":1391},"error-handling","Error handling",[506,1394,1395,1396,1399,1400,1403,1404,1403,1407,1410],{},"Use ",[520,1397,1398],{},"createError"," where you want structured fields (",[520,1401,1402],{},"why",", ",[520,1405,1406],{},"fix",[520,1408,1409],{},"link","). Map failures to your Lambda return or rethrow so SQS retry\u002FDLQ behavior stays correct—evlog does not replace AWS error semantics.",[637,1412,1414],{"className":710,"code":1413,"filename":712,"language":713,"meta":643,"style":643},"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",[520,1415,1416,1435,1439,1450,1466,1479,1495,1511],{"__ignoreMap":643},[647,1417,1418,1420,1422,1425,1427,1429,1431,1433],{"class":649,"line":650},[647,1419,721],{"class":720},[647,1421,728],{"class":727},[647,1423,1424],{"class":731}," createError",[647,1426,735],{"class":727},[647,1428,738],{"class":720},[647,1430,741],{"class":727},[647,1432,772],{"class":656},[647,1434,747],{"class":727},[647,1436,1437],{"class":649,"line":750},[647,1438,781],{"emptyLinePlaceholder":780},[647,1440,1441,1444,1446,1448],{"class":649,"line":777},[647,1442,1443],{"class":720},"throw",[647,1445,1424],{"class":787},[647,1447,791],{"class":731},[647,1449,794],{"class":727},[647,1451,1452,1455,1457,1459,1462,1464],{"class":649,"line":784},[647,1453,1454],{"class":800},"  message",[647,1456,804],{"class":727},[647,1458,741],{"class":727},[647,1460,1461],{"class":656},"Invalid payload",[647,1463,819],{"class":727},[647,1465,956],{"class":727},[647,1467,1468,1471,1473,1477],{"class":649,"line":797},[647,1469,1470],{"class":800},"  status",[647,1472,804],{"class":727},[647,1474,1476],{"class":1475},"sbssI"," 400",[647,1478,956],{"class":727},[647,1480,1481,1484,1486,1488,1491,1493],{"class":649,"line":846},[647,1482,1483],{"class":800},"  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