Method drain

src/mcp/query-pool.ts:262–283

()

  }

  private drain(): void {
    // Grow toward maxSize while queued work outstrips workers that are idle OR
    // already on their way up (pending) — so we never spawn the whole pool for a
    // single call whose eager worker just hasn't reported ready yet.
    while (
      this.queue.length > this.idle.length + this.pendingWorkers.size &&
      this.workers.size < this.maxSize &&
      this.pendingWorkers.size < MAX_CONCURRENT_SPAWN &&
      this.healthy
    ) {
      this.spawnOne();
    }
    while (this.idle.length && this.queue.length) {
      // Skip jobs the backstop already answered.
      let job: Job | undefined;
      while (this.queue.length && (job = this.queue.shift()) && job.settled) job = undefined;
      if (!job || job.settled) break;
      const w = this.idle.pop()!;
      this.inflight.set(w, job);
      w.postMessage({ type: 'call', id: job.id, toolName: job.toolName, args: job.args });
    }
  }

  private settle(job: Job, result: ToolResult): void {
    if (job.settled) return; // already answered (by backstop or worker)