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node.ts
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import { createLogger } from '@sim/logger'
import { EDGE } from '@/executor/constants'
import type { DAG, DAGNode } from '@/executor/dag/builder'
import type { BlockExecutor } from '@/executor/execution/block-executor'
import type { BlockStateController } from '@/executor/execution/types'
import type { LoopOrchestrator } from '@/executor/orchestrators/loop'
import type { ParallelOrchestrator } from '@/executor/orchestrators/parallel'
import type { ExecutionContext, NormalizedBlockOutput } from '@/executor/types'
import { extractBaseBlockId } from '@/executor/utils/subflow-utils'
const logger = createLogger('NodeExecutionOrchestrator')
export interface NodeExecutionResult {
nodeId: string
output: NormalizedBlockOutput
isFinalOutput: boolean
}
export class NodeExecutionOrchestrator {
constructor(
private dag: DAG,
private state: BlockStateController,
private blockExecutor: BlockExecutor,
private loopOrchestrator: LoopOrchestrator,
private parallelOrchestrator: ParallelOrchestrator
) {}
async executeNode(ctx: ExecutionContext, nodeId: string): Promise<NodeExecutionResult> {
const node = this.dag.nodes.get(nodeId)
if (!node) {
throw new Error(`Node not found in DAG: ${nodeId}`)
}
if (ctx.runFromBlockContext && !ctx.runFromBlockContext.dirtySet.has(nodeId)) {
const cachedOutput = this.state.getBlockOutput(nodeId) || {}
logger.debug('Skipping non-dirty block in run-from-block mode', { nodeId })
return {
nodeId,
output: cachedOutput,
isFinalOutput: false,
}
}
const isDirtyBlock = ctx.runFromBlockContext?.dirtySet.has(nodeId) ?? false
if (!isDirtyBlock && this.state.hasExecuted(nodeId)) {
const output = this.state.getBlockOutput(nodeId) || {}
return {
nodeId,
output,
isFinalOutput: false,
}
}
const loopId = node.metadata.loopId
if (loopId && !this.loopOrchestrator.getLoopScope(ctx, loopId)) {
await this.loopOrchestrator.initializeLoopScope(ctx, loopId)
}
const parallelId = node.metadata.parallelId
if (parallelId && !this.parallelOrchestrator.getParallelScope(ctx, parallelId)) {
const parallelConfig = this.dag.parallelConfigs.get(parallelId)
const nodesInParallel = parallelConfig?.nodes?.length || 1
await this.parallelOrchestrator.initializeParallelScope(ctx, parallelId, nodesInParallel)
}
if (node.metadata.isSentinel) {
const output = await this.handleSentinel(ctx, node)
const isFinalOutput = node.outgoingEdges.size === 0
return {
nodeId,
output,
isFinalOutput,
}
}
const output = await this.blockExecutor.execute(ctx, node, node.block)
const isFinalOutput = node.outgoingEdges.size === 0
return {
nodeId,
output,
isFinalOutput,
}
}
private async handleSentinel(
ctx: ExecutionContext,
node: DAGNode
): Promise<NormalizedBlockOutput> {
const sentinelType = node.metadata.sentinelType
const loopId = node.metadata.loopId
const parallelId = node.metadata.parallelId
const isParallelSentinel = node.metadata.isParallelSentinel
if (isParallelSentinel) {
return await this.handleParallelSentinel(ctx, node, sentinelType, parallelId)
}
switch (sentinelType) {
case 'start': {
if (loopId) {
const shouldExecute = await this.loopOrchestrator.evaluateInitialCondition(ctx, loopId)
if (!shouldExecute) {
logger.info('Loop initial condition false, skipping loop body', { loopId })
return {
sentinelStart: true,
shouldExit: true,
selectedRoute: EDGE.LOOP_EXIT,
}
}
}
return { sentinelStart: true }
}
case 'end': {
if (!loopId) {
logger.warn('Sentinel end called without loopId')
return { shouldExit: true, selectedRoute: EDGE.LOOP_EXIT }
}
const continuationResult = await this.loopOrchestrator.evaluateLoopContinuation(ctx, loopId)
if (continuationResult.shouldContinue) {
return {
shouldContinue: true,
shouldExit: false,
selectedRoute: continuationResult.selectedRoute,
}
}
return {
results: continuationResult.aggregatedResults || [],
shouldContinue: false,
shouldExit: true,
selectedRoute: continuationResult.selectedRoute,
totalIterations: continuationResult.aggregatedResults?.length || 0,
}
}
default:
logger.warn('Unknown sentinel type', { sentinelType })
return {}
}
}
private async handleParallelSentinel(
ctx: ExecutionContext,
node: DAGNode,
sentinelType: string | undefined,
parallelId: string | undefined
): Promise<NormalizedBlockOutput> {
if (!parallelId) {
logger.warn('Parallel sentinel called without parallelId')
return {}
}
if (sentinelType === 'start') {
if (!this.parallelOrchestrator.getParallelScope(ctx, parallelId)) {
const parallelConfig = this.dag.parallelConfigs.get(parallelId)
if (parallelConfig) {
const nodesInParallel = parallelConfig.nodes?.length || 1
await this.parallelOrchestrator.initializeParallelScope(ctx, parallelId, nodesInParallel)
}
}
const scope = this.parallelOrchestrator.getParallelScope(ctx, parallelId)
if (scope?.isEmpty) {
logger.info('Parallel has empty distribution, skipping parallel body', { parallelId })
return {
sentinelStart: true,
shouldExit: true,
selectedRoute: EDGE.PARALLEL_EXIT,
}
}
return { sentinelStart: true }
}
if (sentinelType === 'end') {
const result = await this.parallelOrchestrator.aggregateParallelResults(ctx, parallelId)
return {
results: result.results || [],
sentinelEnd: true,
selectedRoute: EDGE.PARALLEL_EXIT,
totalBranches: result.totalBranches,
}
}
logger.warn('Unknown parallel sentinel type', { sentinelType })
return {}
}
async handleNodeCompletion(
ctx: ExecutionContext,
nodeId: string,
output: NormalizedBlockOutput
): Promise<void> {
const node = this.dag.nodes.get(nodeId)
if (!node) {
logger.error('Node not found during completion handling', { nodeId })
return
}
const loopId = node.metadata.loopId
const isParallelBranch = node.metadata.isParallelBranch
const isSentinel = node.metadata.isSentinel
if (isSentinel) {
this.handleRegularNodeCompletion(ctx, node, output)
} else if (loopId) {
this.handleLoopNodeCompletion(ctx, node, output, loopId)
} else if (isParallelBranch) {
const parallelId = this.findParallelIdForNode(node.id)
if (parallelId) {
await this.handleParallelNodeCompletion(ctx, node, output, parallelId)
} else {
this.handleRegularNodeCompletion(ctx, node, output)
}
} else {
this.handleRegularNodeCompletion(ctx, node, output)
}
}
private handleLoopNodeCompletion(
ctx: ExecutionContext,
node: DAGNode,
output: NormalizedBlockOutput,
loopId: string
): void {
this.loopOrchestrator.storeLoopNodeOutput(ctx, loopId, node.id, output)
this.state.setBlockOutput(node.id, output)
}
private async handleParallelNodeCompletion(
ctx: ExecutionContext,
node: DAGNode,
output: NormalizedBlockOutput,
parallelId: string
): Promise<void> {
const scope = this.parallelOrchestrator.getParallelScope(ctx, parallelId)
if (!scope) {
const parallelConfig = this.dag.parallelConfigs.get(parallelId)
const nodesInParallel = parallelConfig?.nodes?.length || 1
await this.parallelOrchestrator.initializeParallelScope(ctx, parallelId, nodesInParallel)
}
const allComplete = this.parallelOrchestrator.handleParallelBranchCompletion(
ctx,
parallelId,
node.id,
output
)
if (allComplete) {
await this.parallelOrchestrator.aggregateParallelResults(ctx, parallelId)
}
this.state.setBlockOutput(node.id, output)
}
private handleRegularNodeCompletion(
ctx: ExecutionContext,
node: DAGNode,
output: NormalizedBlockOutput
): void {
this.state.setBlockOutput(node.id, output)
if (
node.metadata.isSentinel &&
node.metadata.sentinelType === 'end' &&
output.selectedRoute === 'loop_continue'
) {
const loopId = node.metadata.loopId
if (loopId) {
this.loopOrchestrator.clearLoopExecutionState(loopId, ctx)
this.loopOrchestrator.restoreLoopEdges(loopId)
}
}
}
private findParallelIdForNode(nodeId: string): string | undefined {
const baseId = extractBaseBlockId(nodeId)
return this.parallelOrchestrator.findParallelIdForNode(baseId)
}
}