How to use retry - 10 common examples

if (config.org.debug) {
        console.log("\n------------------------------");
        console.log("emacsclient: ", config.org.emacsclient);
        console.log("emacs_lisp: \n", emacs_lisp);
        console.log("\n------------------------------");
    }

    // Remove triling garbages
    emacs_lisp = fix_elisp(emacs_lisp);

    var exec_args = ['-nw', '-s', 'hexo-renderer-org', '-e', emacs_lisp];

    // if (config.org.export_cfg != '')
    //    exec_args.splice(1,0,'--execute', config.org.export_cfg);

    var operation = retry.operation( {
        retries: 100,
        factor: 2,
        minTimeout: 100,
        maxTimeout: 1000,
        randomize: true
    });

    operation.attempt(function (currentAttempt) {

        var proc = child_process.spawn(config.org.emacsclient, exec_args, {
            stdio: 'inherit'
        });

        function retryOrExit(err) {
            if (config.org.debug)
                console.log("RETRY: ", data.path);

if (_.isUndefined(renderedQuery)) {
      debugLog.push(req, 'No query to call ES with. Skipping');
      return next();
    }

    // options for retry
    // maxRetries is from the API config with default of 3
    // factor of 1 means that each retry attempt will esclient requestTimeout
    const operationOptions = {
      retries: _.get(apiConfig, 'requestRetries', 3),
      factor: 1,
      minTimeout: _.get(esclient, 'transport.requestTimeout')
    };

    // setup a new operation
    const operation = retry.operation(operationOptions);

    // elasticsearch command
    const cmd = {
      index: apiConfig.indexName,
      searchType: 'dfs_query_then_fetch',
      body: renderedQuery.body
    };

    logger.debug( '[ES req]', cmd );
    debugLog.push(req, {ES_req: cmd});

    operation.attempt((currentAttempt) => {
      const initialTime = debugLog.beginTimer(req, `Attempt ${currentAttempt}`);
      // query elasticsearch
      searchService( esclient, cmd, function( err, docs, meta ){
        // returns true if the operation should be attempted again

function download (url, file, options) {
    var operation;
    var response;
    var deferred = Q.defer();
    var progressDelay = 8000;

    options = mout.object.mixIn({
        retries: 5,
        factor: 2,
        minTimeout: 1000,
        maxTimeout: 35000,
        randomize: true
    }, options || {});

    // Retry on network errors
    operation = retry.operation(options);
    operation.attempt(function () {
        var req;
        var writeStream;
        var contentLength;
        var bytesDownloaded = 0;

        req = progress(request(url, options), {
            delay: progressDelay
        })
                .on('response', function (res) {
                    var status = res.statusCode;

                    if (status < 200 || status >= 300) {
                        return deferred.reject(createError('Status code of ' + status, 'EHTTP'));
                    }

function addRemoteTarball_(u, tmp, shasum, cb) {
  // Tuned to spread 3 attempts over about a minute.
  // See formula at .
  var operation = retry.operation
    ( { retries: npm.config.get("fetch-retries")
      , factor: npm.config.get("fetch-retry-factor")
      , minTimeout: npm.config.get("fetch-retry-mintimeout")
      , maxTimeout: npm.config.get("fetch-retry-maxtimeout") })

  operation.attempt(function (currentAttempt) {
    log.info("retry", "fetch attempt " + currentAttempt
      + " at " + (new Date()).toLocaleTimeString())
    fetchAndShaCheck(u, tmp, shasum, function (er, response, shasum) {
      // Only retry on 408, 5xx or no `response`.
      var sc = response && response.statusCode
      var statusRetry = !sc || (sc === 408 || sc >= 500)
      if (er && statusRetry && operation.retry(er)) {
        log.info("retry", "will retry, error on last attempt: " + er)
        return
      }

if (_.isUndefined(renderedQuery)) {
      debugLog.push(req, `No query to call ES with. Skipping`);
      return next();
    }

    // options for retry
    // maxRetries is from the API config with default of 3
    // factor of 1 means that each retry attempt will esclient requestTimeout
    const operationOptions = {
      retries: _.get(apiConfig, 'requestRetries', 3),
      factor: 1,
      minTimeout: _.get(esclient, 'transport.requestTimeout')
    };

    // setup a new operation
    const operation = retry.operation(operationOptions);

    // elasticsearch command
    const cmd = {
      index: apiConfig.indexName,
      searchType: 'dfs_query_then_fetch',
      body: renderedQuery.body
    };

    logger.debug( '[ES req]', cmd );
    debugLog.push(req, {ES_req: cmd});

    operation.attempt((currentAttempt) => {
      const initialTime = debugLog.beginTimer(req, `Attempt ${currentAttempt}`);
      // query elasticsearch
      searchService( esclient, cmd, function( err, docs, meta, data ){
        const message = {

function executeAction(promiseFactoryMethod) {
  let operation = retry.operation({
    retries: 3,
    minTimeout: 1000
  });

  let errorHandler = (reject, error) => {
    logger.error(error.toString(true));
    if ((error instanceof HttpRequestError) && operation.retry(error)) reject(error);
    if (operation.mainError() !== null) {
      reject(operation.mainError());
    } else {
      reject(error.toString(true));
    }
  };

  return new Promise((resolve, reject) => {
    operation.attempt(() => {

_runWebSocket()
	{
		const operation =
			retry.operation(this._options.retry || DEFAULT_RETRY_OPTIONS);

		let wasConnected = false;

		operation.attempt((currentAttempt) =>
		{
			if (this._closed)
			{
				operation.stop();

				return;
			}

			logger.debug('_runWebSocket() [currentAttempt:%s]', currentAttempt);

			this._ws = new W3CWebSocket(
				this._url,

_execWithRetries(cqlQuery, dataParams, options, task) {
    const retryDelay = Math.max(this.config.retryDelay || 100, 0);
    const operation = retry.operation(this.config.retryOptions);
    let consistency = options.consistency || this.poolConfig.consistencyLevel;
    return new Promise((resolve, reject) => {
      const executeRetryableCql = () => {
        operation.attempt(async currentAttempt => {
          options.consistency = consistency;
          const queryRequestId = uuid.v4();
          try {
            const result = await this._timeQuery(queryRequestId, cqlQuery, dataParams, options, async options => {
              const pool = await this._preparePool(options);
              return task(pool, consistency);
            });
            return void resolve(result);
          } catch (err) {
            if (this._canRetryError(err)) {
              if (operation.retry(err)) {
                this.logger.warn(`priam.Cql: Retryable error condition encountered. Executing retry #${currentAttempt}...`, {

ConsumerGroupRecovery.prototype.getRetryTimeout = function (error) {
  assert(error);
  if (!this._timeouts) {
    this._timeouts = retry.timeouts({
      retries: this.options.retries,
      factor: this.options.retryFactor,
      minTimeout: this.options.retryMinTimeout
    });
  }

  if (this._retryIndex == null || this.lastError == null || error.errorCode !== this.lastError.errorCode) {
    this._retryIndex = 0;
  }

  var index = this._retryIndex++;
  if (index >= this._timeouts.length) {
    return false;
  }
  return this._timeouts[index];
};