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run.js
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run.js
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"use strict";
var CONSTANTS = require("./constants.js"),
helpers = require("./helpers.js"),
fs = require("fs-extra"),
path = require("path"),
configFilename = process.argv[2] || "config",
config = JSON.parse(fs.readFileSync(configFilename).toString()),
enableVerbose = "-verbose" === process.argv[3],
verbose,
filters = [],
storageConfig,
storageContext,
storage,
runningExtractors = 0,
extractorsPromise,
extractorsDone,
pendingExtractions = 0,
extractionPromise,
extractionDone,
statistics = {
extracted: 0,
filtered: 0,
untouched: 0,
created: 0,
updated: 0
};
function nop () {}
if (enableVerbose) {
verbose = console.log.bind(console);
} else {
verbose = nop;
}
function recordExtracted (extractorRecord) {
var idx = 0,
record,
storedRecord;
++pendingExtractions;
++statistics.extracted;
function done () {
if (0 === --pendingExtractions && extractionDone) {
extractionDone();
}
}
function failed (reason) {
console.error(reason);
done();
}
function succeeded () {
var updated;
if (storedRecord) {
if (helpers.equal(storedRecord, record)) {
++statistics.untouched;
done();
return;
}
updated = true;
++statistics.updated;
} else {
updated = false;
++statistics.created;
}
storage.add.call(storageContext, storageConfig, record, updated).then(done, failed);
}
function loop () {
try {
filters[idx](record)
.then(function (filteredRecord) {
if (filteredRecord) {
record = filteredRecord;
if (++idx < filters.length) {
loop();
} else {
succeeded();
}
} else {
++statistics.filtered;
done();
}
}, failed);
} catch (e) {
failed(e);
}
}
storage.find.call(storageContext, storageConfig, extractorRecord[CONSTANTS.RECORD_UID])
.then(function (storageRecord) {
record = {};
if (storageRecord) {
storedRecord = storageRecord;
helpers.extend(record, storageRecord);
}
helpers.extend(record, extractorRecord);
if (filters.length) {
loop();
} else {
succeeded();
}
}, failed);
// For now, no need to wait
return Promise.resolve();
}
function checkForExtension (typedConfig) {
var extension = typedConfig[".extends"];
if (extension) {
return helpers.extend(typedConfig, config.commons[extension]);
}
return typedConfig;
}
verbose("Processing filters...");
(config.filters || []).forEach(function (filterConfig) {
filterConfig = checkForExtension(filterConfig);
var filterModule = require("./filters/" + filterConfig.type + ".js");
filters.push(filterModule.filter.bind({}, filterConfig));
});
verbose("Opening storage...");
storageConfig = checkForExtension(config.storage);
storageContext = {};
storage = require("./storage/" + storageConfig.type + ".js");
storage.open.call(storageContext, storageConfig)
.then(function () {
verbose("Running extractors...");
runningExtractors = config.extractors.length;
extractorsPromise = new Promise(function (resolve) {
extractorsDone = resolve;
});
function extractorEnded () {
if (0 === --runningExtractors) {
extractorsDone();
}
}
config.extractors.forEach(function (extractorConfig, index) {
try {
var tmpDir = path.join(process.env.TEMP, //eslint-disable-line no-process-env
"immo-automata", index.toString()),
extractorContext,
extractorModule,
log,
type;
fs.emptyDirSync(tmpDir);
extractorContext = {
_uid: index,
_tmpDir: tmpDir
};
extractorConfig = checkForExtension(extractorConfig);
if (true === extractorConfig[".process"]) {
type = "process";
} else {
type = extractorConfig.type;
}
extractorModule = require("./extractors/" + type + ".js");
if (extractorConfig.verbose) {
log = function (text) {
console.log("[extractor" + extractorContext._uid + "] " + text);
};
} else {
log = nop;
}
extractorModule.start.call(extractorContext, extractorConfig, recordExtracted, log)
.then(function () {
verbose("[extractor" + extractorContext._uid + "] ended");
extractorEnded();
}, function (reason) {
verbose("[extractor" + extractorContext._uid + "] failed: " + JSON.stringify(reason));
extractorEnded();
});
} catch (e) {
console.error(e);
verbose(JSON.stringify(extractorConfig));
}
});
verbose(runningExtractors + " extractors running...");
extractorsPromise
.then(function (/*statuses*/) {
if (pendingExtractions) {
verbose("end of extractors, waiting for pending extractions...");
extractionPromise = new Promise(function (resolve) {
extractionDone = resolve;
});
return extractionPromise;
}
return Promise.resolve();
})
.then(function () {
verbose("end of extraction, waiting for storage closing...");
return storage.close.call(storageContext, storageConfig);
})
.then(function (storageStatistics) {
verbose("Extraction statistics:");
verbose("\titems extracted: " + statistics.extracted);
verbose("\titems filtered: " + statistics.filtered);
verbose("Records statistics:");
verbose("\tnot modified: " + statistics.untouched);
verbose("\tcreated: " + statistics.created);
verbose("\tupdated: " + statistics.updated);
if (storageStatistics) {
verbose("Storage statistics:");
Object.keys(storageStatistics).forEach(function (label) {
verbose("\t" + label + ": " + storageStatistics[label]);
});
}
verbose("end.");
});
}, function (reason) {
console.error(reason);
});