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const mariadb = require( 'mariadb' );
const DATADIR = process.env.DATADIR;
const logger = require( './pipeline-logger.js' ).getPipelineLogger();
const jobStates = {
STARTED: 0,
COMPLETE: 1,
ERROR: 2,
RETRIED: 3
};
const options = {
host: process.env.MYSQL_HOST,
user: process.env.MYSQL_RW_USER,
password: process.env.MYSQL_RW_PASS,
database: process.env.MYSQL_DATABASE,
port: process.env.MYSQL_PORT
};
/**
* Get the information of any batches that have failed and output it as
* an object containing the batch recreation information (batch file, feed inputs).
*
* @return {Array}
*
*/
async function getFailedBatches() {
const connection = await mariadb.createConnection( options );
let failedBatches = await connection.query( `
SELECT
feed_file_yesterday,
feed_file_today,
batch_file
FROM
import_status
WHERE
batch_status = ?;
`, [ jobStates.ERROR ] );
await connection.end();
failedBatches = convertBufferToString( failedBatches );
return failedBatches;
}
/**
* Check if any imports are incomplete and return a list of untried batches
* if any are found.
* Two kinds of incomplete import can be found:
* 1. Today's import is incomplete:
* This will check the import status from today's and yesterday's feed dates
* 2. Today's import never completed the first batch or errored out:
* This will check the import status of the import before today
* as if it never completed a batch then a fresh import can be started
* and if it caught on an error, getFailedBatch() would catch it instead
*
* @return {Object}
*
*/
async function getIncompleteImport() {
const connection = await mariadb.createConnection( options );
// Get the date of the last run import with at least one successful batch
// If an import started and errored out on the first batch, it would
// be caught by another check and then otherwise, the import has not been
// attempted
let latestImportDates = await connection.query( `
SELECT
batch_count,
feed_file_yesterday,
feed_file_today
FROM
import_status
WHERE
batch_status = ?
ORDER BY timestamp
DESC
LIMIT 1;
`, [ jobStates.COMPLETE ] );
latestImportDates = convertBufferToString( latestImportDates );
latestImportDates = latestImportDates[ 0 ];
// Use the date to count how many batches of the import have been completed
let latestImportBatches = await connection.query( `
SELECT
batch_file
FROM
import_status
WHERE
feed_file_yesterday = ?
AND
feed_file_today = ?
AND
batch_status = ?;
`, [
latestImportDates.feed_file_yesterday ? `${ DATADIR }/${ latestImportDates.feed_file_yesterday }.json.gz` : '',
latestImportDates.feed_file_today ? `${ DATADIR }/${ latestImportDates.feed_file_today }.json.gz` : '',
jobStates.COMPLETE
] );
latestImportBatches = convertBufferToString( latestImportBatches );
await connection.end();
// Return the status of the latest import
// If the import ran but is incomplete, pass along a list of
// completed batches so a continued import can skip them
return {
yesterday: latestImportDates.feed_file_yesterday,
today: latestImportDates.feed_file_today,
completedBatches: latestImportBatches.length === latestImportDates.batch_count ?
null : latestImportBatches
};
}
/**
* Return the status of an import (defined by a yesterday and today feed)
* The following states are possible:
* - if failed batches are found: return ERROR and the array of batches to retry
* - if an incomplete import is found: return INCOMPLETE and the array of batches to skip
* - if the import is complete: return COMPLETE
* - if the import hasn't been attempted: return NOT_STARTED
* main.sh will use this status to determine what next step to perform,
* if any, and is expected to only ever pick one step per run.
*
* @param {string} yesterday - file name of yesterday's feed
* @param {string} today - file name of today's feed
*
* @return {Promise<void>}
*
*/
async function getImportStatus( yesterday, today ) {
const params = {
status: null,
yesterday: null,
today: null,
retryBatches: null,
completedBatches: null
};
// Check for failed imports
const failedBatches = await getFailedBatches();
// If there are any failed imports, return the batches and dates
// that failed so they can be retried
//
// Because imports run serially and only after the previous one has been
// completed successfully, the yesterday and today dates for all
// batches returned are expected to be the same
if ( failedBatches.length ) {
console.log( JSON.stringify( { ...params, ...{
status: 'ERROR',
yesterday: failedBatches[ 0 ].feed_file_yesterday,
today: failedBatches[ 0 ].feed_file_today,
retryBatches: failedBatches.map( function ( batch ) {
return batch.batch_file;
} )
} } ) );
return;
}
// Check for incomplete imports
const latestKnownImportStatus = await getIncompleteImport();
// If an incomplete import is found, return the dates
// and the batches that have been completed so they can be skipped
if ( latestKnownImportStatus.completedBatches ) {
console.log( JSON.stringify( { ...params, ...{
status: 'INCOMPLETE',
yesterday: latestKnownImportStatus.yesterday,
today: latestKnownImportStatus.today,
completedBatches: latestKnownImportStatus.completedBatches.map( function ( batch ) {
return batch.batch_file;
} )
} } ) );
return;
}
// Otherwise, the import status check returned a complete latest import
// Compare the dates returned with the dates passed in to see if the import
// was already run and completed and return if so
if (
yesterday === latestKnownImportStatus.yesterday &&
today === latestKnownImportStatus.today
) {
console.log( JSON.stringify( { ...params, ...{
status: 'COMPLETE',
yesterday: yesterday,
today: today
} } ) );
return;
}
// All other cases exhausted; this is an import that hasn't been run yet
console.log( JSON.stringify( { ...params, ...{
status: 'NOT_STARTED',
yesterday: yesterday,
today: today
} } ) );
return;
}
/**
* Update the batch status when it's been retried
*
* @param {string} batchFile - filepath to the batch file that's been retried
* @param {string} yesterday - filepath to the batch's yesterday feed
* @param {string} today - filepath to batch's today feed
* @param {string} originalType - type of batch that import corrected (STARTED, ERROR)
*/
async function updateBatchStatus( batchFile, yesterday, today, originalType ) {
// Mark the processed errored-out batch files as retried
const connection = await mariadb.createConnection( options );
await connection.query( `
UPDATE import_status
SET
batch_status = ?
WHERE
feed_file_yesterday = ? AND
feed_file_today = ? AND
batch_status = ? AND
batch_file = ?;
`, [ jobStates.RETRIED, yesterday, today, jobStates[ originalType ], batchFile ] );
logger.info( `Batch file ${ batchFile } was restarted.` );
await connection.end();
}
/**
* Batch and feed files come back as filepaths in a buffer
* Transform every buffer into a string and the feed filepaths into file names
* Commands later expect the filename, not a path
*
* @param {string} arr - Array with objects representing batches that have been run
*
* @return {Array}
*
*/
function convertBufferToString( arr ) {
arr.map( function ( batch ) {
const dateGroup = /([1-2][0-9][0-9][0-9])(0[1-9]|1[0-2])(0[1-9]|[1-2][0-9]|3[0-1]).*(?=.json.gz)/g;
if ( batch.feed_file_yesterday ) {
batch.feed_file_yesterday = batch.feed_file_yesterday.toString().match( dateGroup );
batch.feed_file_yesterday = batch.feed_file_yesterday ?
batch.feed_file_yesterday[ 0 ] : null;
}
if ( batch.feed_file_today ) {
batch.feed_file_today = batch.feed_file_today.toString().match( dateGroup );
batch.feed_file_today = batch.feed_file_today ?
batch.feed_file_today[ 0 ] : null;
}
if ( batch.batch_file ) {
batch.batch_file = batch.batch_file.toString();
}
return batch;
} );
return arr;
}
module.exports.jobStates = jobStates;
module.exports.getImportStatus = getImportStatus;
module.exports.updateBatchStatus = updateBatchStatus;
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