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Queue = require(`better-queue`)\nconst { store } = require(`../redux`)\nconst FastMemoryStore = require(`../query/better-queue-custom-store`)\nconst queryRunner = require(`../query/query-runner`)\nconst websocketManager = require(`../utils/websocket-manager`)\nconst GraphQLRunner = require(`./graphql-runner`)\n\nconst createBaseOptions = () => {\n return {\n concurrent: 4,\n store: FastMemoryStore(),\n }\n}\n\nconst createBuildQueue = () => {\n const graphqlRunner = new GraphQLRunner(store)\n const handler = (queryJob, callback) =>\n queryRunner(graphqlRunner, queryJob)\n .then(result => callback(null, result))\n .catch(callback)\n return new Queue(handler, createBaseOptions())\n}\n\nconst createDevelopQueue = getRunner => {\n const queueOptions = {\n ...createBaseOptions(),\n priority: (job, cb) => {\n if (job.id && websocketManager.activePaths.has(job.id)) {\n cb(null, 10)\n } else {\n cb(null, 1)\n }\n },\n merge: (oldTask, newTask, cb) => {\n cb(null, newTask)\n },\n }\n\n const handler = (queryJob, callback) => {\n queryRunner(getRunner(), queryJob).then(\n result => {\n if (queryJob.isPage) {\n websocketManager.emitPageData({\n result,\n id: queryJob.id,\n })\n } else {\n websocketManager.emitStaticQueryData({\n result,\n id: queryJob.id,\n })\n }\n\n callback(null, result)\n },\n error => callback(error)\n )\n }\n\n return new Queue(handler, queueOptions)\n}\n\n/**\n * Returns a promise that pushes jobs onto queue and resolves onces\n * they're all finished processing (or rejects if one or more jobs\n * fail)\n * Note: queue is reused in develop so make sure to thoroughly cleanup hooks\n */\nconst processBatch = async (queue, jobs, activity) => {\n let numJobs = jobs.length\n if (numJobs === 0) {\n return Promise.resolve()\n }\n\n return new Promise((resolve, reject) => {\n if (activity.tick) {\n queue.on(`task_finish`, () => activity.tick())\n }\n\n const gc = () => {\n queue.removeAllListeners(`task_failed`)\n queue.removeAllListeners(`drain`)\n queue.removeAllListeners(`task_finish`)\n queue = null\n }\n\n queue\n // Note: the first arg is the path, the second the error\n .on(`task_failed`, (...err) => {\n gc()\n reject(err)\n })\n // Note: `drain` fires when all tasks _finish_\n // `empty` fires when queue is empty (but tasks are still running)\n .on(`drain`, () => {\n gc()\n resolve()\n })\n\n jobs.forEach(job => queue.push(job))\n })\n}\n\nmodule.exports = {\n createBuildQueue,\n createDevelopQueue,\n processBatch,\n}\n"],"file":"queue.js"} |