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Implemented multiquery jobs for Batch API

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This commit is contained in:
dgaubert 2016-03-31 12:39:03 +02:00
parent ef65350771
commit fd9bfe277e
7 changed files with 222 additions and 96 deletions
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4
batch/index.js
View File

@ -2,6 +2,7 @@
var redis = require('redis');
var JobRunner = require('./job_runner');
var QueryRunner = require('./query_runner');
var JobCanceller = require('./job_canceller');
var JobQueuePool = require('./job_queue_pool');
var JobSubscriber = require('./job_subscriber');
@ -20,7 +21,8 @@ module.exports = function batchFactory (metadataBackend) {
var userIndexer = new UserIndexer(metadataBackend);
var jobBackend = new JobBackend(metadataBackend, jobQueue, jobPublisher, userIndexer);
var userDatabaseMetadataService = new UserDatabaseMetadataService(metadataBackend);
var jobRunner = new JobRunner(jobBackend, userDatabaseMetadataService);
var queryRunner = new QueryRunner();
var jobRunner = new JobRunner(jobBackend, jobQueue, queryRunner, userDatabaseMetadataService);
var jobCanceller = new JobCanceller(metadataBackend, userDatabaseMetadataService, jobBackend);
return new Batch(jobSubscriber, jobQueuePool, jobRunner, jobCanceller);

80
batch/job_backend.js
View File

@ -17,6 +17,16 @@ JobBackend.prototype.create = function (username, sql, host, callback) {
var self = this;
var job_id = uuid.v4();
var now = new Date().toISOString();
if (Array.isArray(sql)) {
for (var i = 0; i < sql.length; i++) {
sql[i] = {
query: sql[i],
status: 'pending'
};
}
}
var redisParams = [
this.redisPrefix + job_id,
'user', username,
@ -193,15 +203,22 @@ JobBackend.prototype.get = function (job_id, callback) {
});
};
JobBackend.prototype.setRunning = function (job, callback) {
JobBackend.prototype.setRunning = function (job, index, callback) {
var self = this;
var now = new Date().toISOString();
var redisParams = [
this.redisPrefix + job.job_id,
'status', 'running',
'updated_at', now
'updated_at', now,
];
if (!callback) {
callback = index;
} else if (index || index === 0) {
job.query[index].status = 'running';
redisParams = redisParams.concat('query', JSON.stringify(job.query));
}
this.metadataBackend.redisCmd(this.db, 'HMSET', redisParams, function (err) {
if (err) {
return callback(err);
@ -211,7 +228,7 @@ JobBackend.prototype.setRunning = function (job, callback) {
});
};
JobBackend.prototype.setPending = function (job, callback) {
JobBackend.prototype.setPending = function (job, index, callback) {
var self = this;
var now = new Date().toISOString();
var redisKey = this.redisPrefix + job.job_id;
@ -221,6 +238,13 @@ JobBackend.prototype.setPending = function (job, callback) {
'updated_at', now
];
if (!callback) {
callback = index;
} else if (index || index === 0) {
job.query[index].status = 'pending';
redisParams = redisParams.concat('query', JSON.stringify(job.query));
}
this.metadataBackend.redisCmd(this.db, 'HMSET', redisParams , function (err) {
if (err) {
return callback(err);
@ -230,7 +254,7 @@ JobBackend.prototype.setPending = function (job, callback) {
});
};
JobBackend.prototype.setDone = function (job, callback) {
JobBackend.prototype.setDone = function (job, index, callback) {
var self = this;
var now = new Date().toISOString();
var redisKey = this.redisPrefix + job.job_id;
@ -240,6 +264,13 @@ JobBackend.prototype.setDone = function (job, callback) {
'updated_at', now
];
if (!callback) {
callback = index;
} else if (index || index === 0) {
job.query[index].status = 'done';
redisParams = redisParams.concat('query', JSON.stringify(job.query));
}
this.metadataBackend.redisCmd(this.db, 'HMSET', redisParams , function (err) {
if (err) {
return callback(err);
@ -255,7 +286,30 @@ JobBackend.prototype.setDone = function (job, callback) {
});
};
JobBackend.prototype.setFailed = function (job, error, callback) {
JobBackend.prototype.setJobPendingAndQueryDone = function (job, index, callback) {
var self = this;
var now = new Date().toISOString();
var redisKey = this.redisPrefix + job.job_id;
job.query[index].status = 'done';
var redisParams = [
redisKey,
'status', 'pending',
'updated_at', now,
'query', JSON.stringify(job.query)
];
this.metadataBackend.redisCmd(this.db, 'HMSET', redisParams , function (err) {
if (err) {
return callback(err);
}
self.get(job.job_id, callback);
});
};
JobBackend.prototype.setFailed = function (job, error, index, callback) {
var self = this;
var now = new Date().toISOString();
var redisKey = this.redisPrefix + job.job_id;
@ -266,6 +320,13 @@ JobBackend.prototype.setFailed = function (job, error, callback) {
'updated_at', now
];
if (!callback) {
callback = index;
} else if (index || index === 0) {
job.query[index].status = 'failed';
redisParams = redisParams.concat('query', JSON.stringify(job.query));
}
this.metadataBackend.redisCmd(this.db, 'HMSET', redisParams , function (err) {
if (err) {
return callback(err);
@ -281,7 +342,7 @@ JobBackend.prototype.setFailed = function (job, error, callback) {
});
};
JobBackend.prototype.setCancelled = function (job, callback) {
JobBackend.prototype.setCancelled = function (job, index, callback) {
var self = this;
var now = new Date().toISOString();
var redisKey = this.redisPrefix + job.job_id;
@ -291,6 +352,13 @@ JobBackend.prototype.setCancelled = function (job, callback) {
'updated_at', now
];
if (!callback) {
callback = index;
} else if (index || index === 0) {
job.query[index].status = 'cancelled';
redisParams = redisParams.concat('query', JSON.stringify(job.query));
}
this.metadataBackend.redisCmd(this.db, 'HMSET', redisParams , function (err) {
if (err) {
return callback(err);

14
batch/job_canceller.js
View File

@ -8,6 +8,16 @@ function JobCanceller(metadataBackend, userDatabaseMetadataService, jobBackend)
this.jobBackend = jobBackend;
}
function getIndexOfRunningQuery(job) {
if (Array.isArray(job.query)) {
for (var i = 0; i < job.query.length; i++) {
if (job.query[i].status === 'running') {
return i;
}
}
}
}
JobCanceller.prototype.cancel = function (job_id, callback) {
var self = this;
@ -36,7 +46,9 @@ JobCanceller.prototype.cancel = function (job_id, callback) {
return callback(err);
}
self.jobBackend.setCancelled(job, callback);
var queryIndex = getIndexOfRunningQuery(job);
self.jobBackend.setCancelled(job, queryIndex, callback);
});
});
});

153
batch/job_runner.js
View File

@ -1,12 +1,40 @@
'use strict';
var errorCodes = require('../app/postgresql/error_codes').codeToCondition;
var PSQL = require('cartodb-psql');
var queue = require('queue-async');
function getNextQuery(job) {
if (!Array.isArray(job.query)) {
return {
query: job.query
};
}
function JobRunner(jobBackend, userDatabaseMetadataService) {
for (var i = 0; i < job.query.length; i++) {
if (job.query[i].status === 'pending') {
return {
index: i,
query: job.query[i].query
};
}
}
}
function isLastQuery(job, index) {
if (!Array.isArray(job.query)) {
return true;
}
if (index >= (job.query.length -1)) {
return true;
}
return false;
}
function JobRunner(jobBackend, jobQueue, queryRunner,userDatabaseMetadataService) {
this.jobBackend = jobBackend;
this.jobQueue = jobQueue;
this.queryRunner = queryRunner;
this.userDatabaseMetadataService = userDatabaseMetadataService;
}
@ -19,44 +47,49 @@ JobRunner.prototype.run = function (job_id, callback) {
}
if (job.status !== 'pending') {
var error = new Error('Cannot run job ' + job.job_id + ' due to its status is ' + job.status);
error.name = 'InvalidJobStatus';
return callback(error);
var invalidJobStatusError = new Error([
'Cannot run job',
job.job_id,
'due to its status is',
job.status
].join(' '));
invalidJobStatusError.name = 'InvalidJobStatus';
return callback(invalidJobStatusError);
}
var query = getNextQuery(job);
if (!query) {
var queryNotFoundError = new Error([
'Cannot run job',
job.job_id,
', there is no query to run'
].join(' '));
queryNotFoundError.name = 'QueryNotFound';
return callback(queryNotFoundError);
}
self.jobBackend.setRunning(job, query.index, function (err, job) {
if (err) {
return callback(err);
}
self._run(job, query, callback);
});
});
};
JobRunner.prototype._run = function (job, query, callback) {
var self = this;
self.userDatabaseMetadataService.getUserMetadata(job.user, function (err, userDatabaseMetadata) {
if (err) {
return callback(err);
}
self.jobBackend.setRunning(job, function (err, job) {
self.queryRunner.run(job.job_id, query.query, userDatabaseMetadata, function (err /*, result */) {
if (err) {
return callback(err);
}
self._runInSeries(job, userDatabaseMetadata, callback);
});
});
});
};
JobRunner.prototype._runInSeries = function(job, userDatabaseMetadata, callback) {
var self = this;
var jobQueue = queue(1); // performs in series
var isMultiQuery = true;
if (!Array.isArray(job.query)) {
isMultiQuery = false;
job.query = [ job.query ];
}
for (var i = 0; i < job.query.length; i++) {
jobQueue.defer(this._run.bind(this), job, userDatabaseMetadata, i, isMultiQuery);
}
jobQueue.await(function (err) {
if (err) {
// if query has been cancelled then it's going to get the current job status saved by query_canceller
// if query has been cancelled then it's going to get the current
// job status saved by query_canceller
if (errorCodes[err.code.toString()] === 'query_canceled') {
return self.jobBackend.get(job.job_id, callback);
}
@ -64,62 +97,24 @@ JobRunner.prototype._runInSeries = function(job, userDatabaseMetadata, callback)
return self.jobBackend.setFailed(job, err, callback);
}
self.jobBackend.setDone(job, callback);
});
};
JobRunner.prototype._run = function (job, userDatabaseMetadata, index, isMultiQuery, callback) {
this._query(job, userDatabaseMetadata, index, function (err, result) {
var note = '';
if (err && isMultiQuery) {
if (index > 0) {
note = '; previous queries have finished successfully';
if (isLastQuery(job, query.index)) {
console.log('set done', query.index);
return self.jobBackend.setDone(job, query.index, callback);
}
if (index < (job.query.length - 1)) {
note += (note ? ' and ' : '; ') + 'later queries were omitted';
}
err.message = 'error on query ' + (index + 1) +': ' + err.message + note;
return callback(err);
}
self.jobBackend.setJobPendingAndQueryDone(job, query.index, function (err, job) {
if (err) {
return callback(err);
}
callback(null, result);
});
};
JobRunner.prototype._query = function (job, userDatabaseMetadata, index, callback) {
var self = this;
var pg = new PSQL(userDatabaseMetadata, {}, { destroyOnError: true });
pg.query('SET statement_timeout=0', function (err) {
if(err) {
return self.jobBackend.setFailed(job, err, callback);
}
// mark query to allow to users cancel their queries
var sql = '/* ' + job.job_id + ' */ ' + job.query[index];
pg.eventedQuery(sql, function (err, query) {
self.jobQueue.enqueue(job.job_id, userDatabaseMetadata.host, function (err){
if (err) {
return self.jobBackend.setFailed(job, err, callback);
return callback(err);
}
query.on('error', callback);
query.on('end', function (result) {
// only if result is present then query is done sucessfully otherwise an error has happened
// and it was handled by error listener
if (result) {
callback(null, result);
}
callback(null, job);
});
});
});
});

40
batch/query_runner.js Normal file
View File

@ -0,0 +1,40 @@
'use strict';
var PSQL = require('cartodb-psql');
function QueryRunner() {
}
QueryRunner.prototype.run = function (job_id, sql, userDatabaseMetadata, callback) {
var pg = new PSQL(userDatabaseMetadata, {}, { destroyOnError: true });
pg.query('SET statement_timeout=0', function (err) {
if(err) {
return callback(err);
}
// mark query to allow to users cancel their queries
sql = '/* ' + job_id + ' */ ' + sql;
pg.eventedQuery(sql, function (err, query) {
if (err) {
return callback(err);
}
query.on('error', callback);
query.on('end', function (result) {
// only if result is present then query is done sucessfully otherwise an error has happened
// and it was handled by error listener
if (result) {
callback(null, result);
}
});
});
});
};
module.exports = QueryRunner;

13
test/acceptance/batch.test.js
View File

@ -198,16 +198,25 @@ describe('batch module', function() {
it('should perform job with array of select', function (done) {
var queries = ['select * from private_table', 'select * from private_table'];
createJob(queries, function (err, job) {
if (err) {
return done(err);
}
batch.on('job:done', function (job_id) {
var queriesDone = 0;
var checkJobDone = function (job_id) {
if (job_id === job.job_id) {
queriesDone += 1;
if (queriesDone === queries.length) {
done();
}
});
}
};
batch.on('job:done', checkJobDone);
batch.on('job:pending', checkJobDone);
});
});

4
test/acceptance/job.use-case-9.test.js
View File

@ -51,8 +51,8 @@ describe('Use case 9: modify a pending multiquery job', function() {
method: 'POST',
data: querystring.stringify({
query: [
"SELECT * FROM untitle_table_4",
"select pg_sleep(3)"
"select pg_sleep(3)",
"SELECT * FROM untitle_table_4"
]
})
}, {