eve/dist/src/execution/workflow-runtime.js

Filesystem-first framework for durable backend AI agents that run anywhere.

import{createLogger,logError}from"#internal/logging.js";import{RuntimeNoActiveSessionError}from"#execution/runtime-errors.js";import{resolveInstalledPackageInfo}from"#internal/application/package.js";import{getCompiledRuntimeAgentBundle}from"#runtime/sessions/compiled-agent-cache.js";import{serializeContext}from"#context/serialize.js";import{getHookByToken,getRun,resumeHook,start}from"#compiled/@workflow/core/runtime.js";import{HookNotFoundError}from"#compiled/@workflow/errors/index.js";import{applyEveWorkflowQueueNamespace}from"#internal/workflow/queue-namespace.js";import{buildRunContext}from"#execution/runtime-context.js";const WORKFLOW_ENTRY_NAME=`workflowEntry`,TURN_WORKFLOW_NAME=`turnWorkflow`,EVE_PACKAGE_INFO=resolveInstalledPackageInfo(),LATEST_DEPLOYMENT_UNSUPPORTED_MESSAGE=`deploymentId 'latest' requires a World that implements resolveLatestDeploymentId()`,STABLE_WORKFLOW_NAMES=new Set([WORKFLOW_ENTRY_NAME,TURN_WORKFLOW_NAME]),STABLE_ID_BASE=EVE_PACKAGE_INFO.name,log=createLogger(`execution.workflow-runtime`),workflowEntryReference={workflowId:`workflow//${STABLE_ID_BASE}//${WORKFLOW_ENTRY_NAME}`},turnWorkflowReference={workflowId:`workflow//${STABLE_ID_BASE}//${TURN_WORKFLOW_NAME}`};function createWorkflowRuntime(e){return{async run(n){let r=serializeContext(buildRunContext({bundle:await getCompiledRuntimeAgentBundle({compiledArtifactsSource:e.compiledArtifactsSource,nodeId:e.nodeId}),run:n})),o;try{o=await startWorkflowPreferLatest(workflowEntryReference,[{input:n.input,serializedContext:r}])}catch(e){throw logError(log,`failed to start workflow run`,e,{continuationToken:n.continuationToken}),e}let s,getEvents=()=>(s??=parseNdjsonStream(()=>getRun(o.runId).getReadable()),s);return{continuationToken:n.continuationToken??o.runId,get events(){return getEvents()},sessionId:o.runId}},async deliver(e){applyEveWorkflowQueueNamespace();let r={auth:e.auth,kind:`deliver`,payloads:[e.payload]};try{let t=normalizeWorkflowHook(await getHookByToken(e.continuationToken));return await resumeHook(e.continuationToken,r),{sessionId:t.runId}}catch(r){throw HookNotFoundError.is(r)?new RuntimeNoActiveSessionError(e.continuationToken):(logError(log,`failed to deliver to active session`,r,{continuationToken:e.continuationToken}),r)}},async getEventStream(e,t){return parseNdjsonStream(()=>getRun(e).getReadable({startIndex:t?.startIndex}))}}}async function startWorkflowPreferLatest(e,t){if(applyEveWorkflowQueueNamespace(),!shouldRouteToLatestDeployment())return await start(e,t);try{return await start(e,t,{deploymentId:`latest`})}catch(n){if(!isLatestDeploymentUnsupportedError(n))throw n;return await start(e,t)}}function shouldRouteToLatestDeployment(){return process.env.VERCEL_ENV===`production`}function isLatestDeploymentUnsupportedError(e){return e instanceof Error&&e.message.includes(`deploymentId 'latest' requires a World that implements resolveLatestDeploymentId()`)}function normalizeWorkflowHook(e){if(typeof e!=`object`||!e||!(`runId`in e))throw Error(`Workflow hook did not include a run id.`);let t=e.runId;if(typeof t!=`string`||t.length===0)throw Error(`Workflow hook did not include a run id.`);return{runId:t}}function parseNdjsonStream(e){let t=new TextDecoder,n=``;return new ReadableStream({async start(r){let i=e().getReader();try{for(;;){let{value:e,done:a}=await i.read();if(a)break;n+=t.decode(e,{stream:!0});for(let e=n.indexOf(`
`);e!==-1;e=n.indexOf(`
`)){let t=n.slice(0,e).trim();n=n.slice(e+1),t.length>0&&r.enqueue(JSON.parse(t))}}n+=t.decode();let e=n.trim();e.length>0&&r.enqueue(JSON.parse(e)),r.close()}catch(e){r.error(e)}finally{i.releaseLock()}}})}export{LATEST_DEPLOYMENT_UNSUPPORTED_MESSAGE,STABLE_WORKFLOW_NAMES,createWorkflowRuntime,startWorkflowPreferLatest,turnWorkflowReference,workflowEntryReference};