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50",[485,686,687],{"class":495},",",[485,689,690],{"class":669}," intervalMs",[485,692,673],{"class":495},[485,694,695],{"class":683}," 2000",[485,697,698],{"class":495}," },\n",[485,700,702,705,707,709,712,714,717],{"class":487,"line":701},10,[485,703,704],{"class":669},"  retry",[485,706,673],{"class":495},[485,708,496],{"class":495},[485,710,711],{"class":669}," maxAttempts",[485,713,673],{"class":495},[485,715,716],{"class":683}," 3",[485,718,698],{"class":495},[485,720,722,725,727,730],{"class":487,"line":721},11,[485,723,724],{"class":669},"  bufferSize",[485,726,673],{"class":495},[485,728,729],{"class":683}," 1000",[485,731,732],{"class":495},",\n",[485,734,736,739],{"class":487,"line":735},12,[485,737,738],{"class":495},"}",[485,740,741],{"class":499},")\n",[485,743,745],{"class":487,"line":744},13,[485,746,631],{"emptyLinePlaceholder":630},[485,748,750,753,756,759,761,764],{"class":487,"line":749},14,[485,751,752],{"class":491},"export",[485,754,755],{"class":637}," const",[485,757,758],{"class":499}," drain ",[485,760,644],{"class":495},[485,762,763],{"class":647}," pipeline",[485,765,766],{"class":499},"(\n",[485,768,770,773,776],{"class":487,"line":769},15,[485,771,772],{"class":647},"  createAxiomDrain",[485,774,775],{"class":499},"()",[485,777,732],{"class":495},[485,779,781,784,786],{"class":487,"line":780},16,[485,782,783],{"class":647},"  createDatadogDrain",[485,785,775],{"class":499},[485,787,732],{"class":495},[485,789,791,794,796,799,802,804,806,809,812,814,817,819],{"class":487,"line":790},17,[485,792,793],{"class":647},"  createSentryDrain",[485,795,660],{"class":499},[485,797,798],{"class":495},"{",[485,800,801],{"class":669}," minLevel",[485,803,673],{"class":495},[485,805,509],{"class":495},[485,807,808],{"class":512},"error",[485,810,811],{"class":495},"'",[485,813,503],{"class":495},[485,815,816],{"class":499},")",[485,818,687],{"class":495},[485,820,822],{"class":821},"sHwdD","  \u002F\u002F Sentry only gets errors\n",[485,824,826,829,831,833,836,838,840,843,845,847,850,852,855,857,859],{"class":487,"line":825},18,[485,827,828],{"class":647},"  createFsDrain",[485,830,660],{"class":499},[485,832,798],{"class":495},[485,834,835],{"class":669}," dir",[485,837,673],{"class":495},[485,839,509],{"class":495},[485,841,842],{"class":512},".evlog\u002Flogs",[485,844,811],{"class":495},[485,846,687],{"class":495},[485,848,849],{"class":669}," maxFiles",[485,851,673],{"class":495},[485,853,854],{"class":683}," 14",[485,856,503],{"class":495},[485,858,816],{"class":499},[485,860,732],{"class":495},[485,862,864],{"class":487,"line":863},19,[485,865,741],{"class":499},[461,867,868,869,872,873,876,877,880],{},"Then register ",[482,870,871],{},"drain"," wherever your framework integration takes a drain — ",[482,874,875],{},"nitroApp.hooks.hook('evlog:drain', drain)"," for Nitro, ",[482,878,879],{},"initLogger({ drain })"," for Next.js \u002F standalone, etc.",[470,882,884],{"id":883},"what-you-get","What you get",[886,887,888,895,901],"ul",{},[889,890,891,894],"li",{},[465,892,893],{},"Parallel dispatch"," — every batch hits all four destinations concurrently",[889,896,897,900],{},[465,898,899],{},"Independent failures"," — if Datadog's API is down, Axiom and Sentry still receive events; the failed batch is retried for Datadog only",[889,902,903,906],{},[465,904,905],{},"Shared backpressure"," — the buffer is sized once for the whole pipeline; if any drain falls behind, the oldest events drop together (consistent across destinations)",[470,908,910],{"id":909},"per-drain-filtering","Per-drain filtering",[461,912,913],{},"Wrap a drain to filter events before they reach it:",[475,915,917],{"className":477,"code":916,"language":479,"meta":480,"style":480},"function onlyErrors(inner: typeof createSentryDrain): typeof createSentryDrain {\n  return (opts) => {\n    const wrapped = inner(opts)\n    return async (ctx) => {\n      const filtered = (Array.isArray(ctx) ? ctx : [ctx]).filter(c => c.event?.level === 'error')\n      if (filtered.length > 0) await wrapped(filtered as never)\n    }\n  }\n}\n\nexport const drain = pipeline(\n  createAxiomDrain(),                                     \u002F\u002F all events\n  onlyErrors(createSentryDrain)({ dsn: process.env.SENTRY_DSN! }),  \u002F\u002F errors only\n)\n",[482,918,919,950,969,989,1008,1090,1130,1135,1140,1145,1149,1163,1174,1214],{"__ignoreMap":480},[485,920,921,924,927,929,933,935,938,940,943,945,948],{"class":487,"line":488},[485,922,923],{"class":637},"function",[485,925,926],{"class":647}," onlyErrors",[485,928,660],{"class":495},[485,930,932],{"class":931},"sHdIc","inner",[485,934,673],{"class":495},[485,936,937],{"class":495}," typeof",[485,939,568],{"class":499},[485,941,942],{"class":495},"):",[485,944,937],{"class":495},[485,946,947],{"class":499}," createSentryDrain ",[485,949,663],{"class":495},[485,951,952,955,958,961,963,966],{"class":487,"line":519},[485,953,954],{"class":491},"  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}\n",[485,1141,1142],{"class":487,"line":666},[485,1143,1144],{"class":495},"}\n",[485,1146,1147],{"class":487,"line":701},[485,1148,631],{"emptyLinePlaceholder":630},[485,1150,1151,1153,1155,1157,1159,1161],{"class":487,"line":721},[485,1152,752],{"class":491},[485,1154,755],{"class":637},[485,1156,758],{"class":499},[485,1158,644],{"class":495},[485,1160,763],{"class":647},[485,1162,766],{"class":499},[485,1164,1165,1167,1169,1171],{"class":487,"line":735},[485,1166,772],{"class":647},[485,1168,775],{"class":499},[485,1170,687],{"class":495},[485,1172,1173],{"class":821},"                                     \u002F\u002F all events\n",[485,1175,1176,1179,1182,1184,1187,1189,1192,1194,1197,1199,1202,1205,1207,1209,1211],{"class":487,"line":744},[485,1177,1178],{"class":647},"  onlyErrors",[485,1180,1181],{"class":499},"(createSentryDrain)(",[485,1183,798],{"class":495},[485,1185,1186],{"class":669}," dsn",[485,1188,673],{"class":495},[485,1190,1191],{"class":499}," process",[485,1193,1025],{"class":495},[485,1195,1196],{"class":499},"env",[485,1198,1025],{"class":495},[485,1200,1201],{"class":499},"SENTRY_DSN",[485,1203,1204],{"class":495},"!",[485,1206,503],{"class":495},[485,1208,816],{"class":499},[485,1210,687],{"class":495},[485,1212,1213],{"class":821},"  \u002F\u002F errors only\n",[485,1215,1216],{"class":487,"line":749},[485,1217,741],{"class":499},[461,1219,1220,1221,1224],{},"Most built-in drains expose ",[482,1222,1223],{},"minLevel"," directly, so you only need this pattern for non-level filters (path, custom field, etc.).",[470,1226,1228],{"id":1227},"what-not-to-do","What not to do",[886,1230,1231,1237,1247],{},[889,1232,1233,1236],{},[465,1234,1235],{},"Don't create one pipeline per drain"," — defeats the batch \u002F retry sharing",[889,1238,1239,1246],{},[465,1240,1241,1242,1245],{},"Don't forget ",[482,1243,1244],{},"drain.flush()"," on shutdown"," — events buffered for fanout are lost on abrupt exit",[889,1248,1249,1252,1253,1257],{},[465,1250,1251],{},"Don't fan out to a serverless-incompatible target without checking"," — the ",[1254,1255,1256],"a",{"href":318},"stream server"," reaches every connected client through the in-process stream; it's not a drain",[470,1259,1261],{"id":1260},"going-further","Going further",[886,1263,1264,1273],{},[889,1265,1266,1268,1269,1272],{},[1254,1267,348],{"href":349}," — the full reference for ",[482,1270,1271],{},"createDrainPipeline()"," options",[889,1274,1275,1277],{},[1254,1276,343],{"href":344}," — fanout works with any drain, including ones you write",[1279,1280,1281],"style",{},"html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .sBMFI, html code.shiki .sBMFI{--shiki-light:#E2931D;--shiki-default:#FFCB6B;--shiki-dark:#FFCB6B}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sbssI, html code.shiki .sbssI{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}",{"title":480,"searchDepth":519,"depth":519,"links":1283},[1284,1285,1286,1287,1288],{"id":472,"depth":519,"text":473},{"id":883,"depth":519,"text":884},{"id":909,"depth":519,"text":910},{"id":1227,"depth":519,"text":1228},{"id":1260,"depth":519,"text":1261},"Send the same wide event to several destinations in parallel — Axiom plus Datadog plus Sentry plus the local fs drain — through a single pipeline.","md",null,{},{"title":303,"icon":306},{"title":456,"description":1289},"PfTBIQZ6jgcafNBlkLaKr7F-9zxT27tN7AvE9RbL8EU",[1297,1299],{"title":298,"path":299,"stem":300,"description":1298,"icon":301,"children":-1},"Subscribe to wide events flowing through evlog, in-process, with createStreamDrain — sync listeners, async iterators, and a ring buffer.",{"title":308,"path":309,"stem":310,"description":1300,"icon":311,"children":-1},"Every drain request sent by evlog is tagged with a User-Agent and an X-Evlog-Source header so receivers can identify the traffic.",1778340168671]