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feat: AWS CloudSearch engine

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This commit is contained in:
Nick 2019-03-16 18:39:31 -04:00
parent c9648371e6
commit 6eb6eecfa2
1 changed files with 178 additions and 47 deletions
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155
server/modules/search/aws/engine.js
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@ -1,6 +1,6 @@
const _ = require('lodash')
const AWS = require('aws-sdk')
const { pipeline } = require('stream')
const { pipeline, Transform } = require('stream')
module.exports = {
async activate() {
@ -20,6 +20,13 @@ module.exports = {
secretAccessKey: this.config.secretAccessKey,
region: this.config.region
})
this.clientDomain = new AWS.CloudSearchDomain({
apiVersion: '2013-01-01',
endpoint: this.config.endpoint,
accessKeyId: this.config.accessKeyId,
secretAccessKey: this.config.secretAccessKey,
region: this.config.region
})
let rebuildIndex = false
@ -141,10 +148,30 @@ module.exports = {
*/
async query(q, opts) {
try {
let suggestions = []
const results = await this.clientDomain.search({
query: q,
partial: true,
size: 50
}).promise()
if (results.hits.found < 5) {
const suggestResults = await this.clientDomain.suggest({
query: q,
suggester: 'default_suggester',
size: 5
}).promise()
suggestions = suggestResults.suggest.suggestions.map(s => s.suggestion)
}
return {
results: [],
suggestions: [],
totalHits: 0
results: _.map(results.hits.hit, r => ({
id: r.id,
path: _.head(r.fields.path),
locale: _.head(r.fields.locale),
title: _.head(r.fields.title),
description: _.head(r.fields.description)
})),
suggestions: suggestions,
totalHits: results.hits.found
}
} catch (err) {
WIKI.logger.warn('Search Engine Error:')
@ -157,16 +184,22 @@ module.exports = {
* @param {Object} page Page to create
*/
async created(page) {
await this.client.indexes.use(this.config.indexName).index([
await this.clientDomain.uploadDocuments({
contentType: 'application/json',
documents: JSON.stringify([
{
type: 'add',
id: page.hash,
fields: {
locale: page.localeCode,
path: page.path,
title: page.title,
description: page.description,
content: page.content
}
}
])
}).promise()
},
/**
* UPDATE
@ -174,16 +207,22 @@ module.exports = {
* @param {Object} page Page to update
*/
async updated(page) {
await this.client.indexes.use(this.config.indexName).index([
await this.clientDomain.uploadDocuments({
contentType: 'application/json',
documents: JSON.stringify([
{
type: 'add',
id: page.hash,
fields: {
locale: page.localeCode,
path: page.path,
title: page.title,
description: page.description,
content: page.content
}
}
])
}).promise()
},
/**
* DELETE
@ -191,12 +230,15 @@ module.exports = {
* @param {Object} page Page to delete
*/
async deleted(page) {
await this.client.indexes.use(this.config.indexName).index([
await this.clientDomain.uploadDocuments({
contentType: 'application/json',
documents: JSON.stringify([
{
'@search.action': 'delete',
type: 'delete',
id: page.hash
}
])
}).promise()
},
/**
* RENAME
@ -204,33 +246,122 @@ module.exports = {
* @param {Object} page Page to rename
*/
async renamed(page) {
await this.client.indexes.use(this.config.indexName).index([
await this.clientDomain.uploadDocuments({
contentType: 'application/json',
documents: JSON.stringify([
{
'@search.action': 'delete',
type: 'delete',
id: page.sourceHash
}
])
await this.client.indexes.use(this.config.indexName).index([
}).promise()
await this.clientDomain.uploadDocuments({
contentType: 'application/json',
documents: JSON.stringify([
{
type: 'add',
id: page.destinationHash,
fields: {
locale: page.localeCode,
path: page.destinationPath,
title: page.title,
description: page.description,
content: page.content
}
}
])
}).promise()
},
/**
* REBUILD INDEX
*/
async rebuild() {
WIKI.logger.info(`(SEARCH/AWS) Rebuilding Index...`)
const MAX_DOCUMENT_BYTES = Math.pow(2, 20)
const MAX_INDEXING_BYTES = 5 * Math.pow(2, 20) - Buffer.from('[').byteLength - Buffer.from(']').byteLength
const MAX_INDEXING_COUNT = 1000
const COMMA_BYTES = Buffer.from(',').byteLength
let chunks = []
let bytes = 0
const processDocument = async (cb, doc) => {
try {
if (doc) {
const docBytes = Buffer.from(JSON.stringify(doc)).byteLength
// -> Document too large
if (docBytes >= MAX_DOCUMENT_BYTES) {
throw new Error('Document exceeds maximum size allowed by AWS CloudSearch.')
}
// -> Current batch exceeds size hard limit, flush
if (docBytes + COMMA_BYTES + bytes >= MAX_INDEXING_BYTES) {
await flushBuffer()
}
if (chunks.length > 0) {
bytes += COMMA_BYTES
}
bytes += docBytes
chunks.push(doc)
// -> Current batch exceeds count soft limit, flush
if (chunks.length >= MAX_INDEXING_COUNT) {
await flushBuffer()
}
} else {
// -> End of stream, flush
await flushBuffer()
}
cb()
} catch (err) {
cb(err)
}
}
const flushBuffer = async () => {
WIKI.logger.info(`(SEARCH/AWS) Sending batch of ${chunks.length}...`)
try {
const resp = await this.clientDomain.uploadDocuments({
contentType: 'application/json',
documents: JSON.stringify(_.map(chunks, doc => ({
type: 'add',
id: doc.id,
fields: {
locale: doc.locale,
path: doc.path,
title: doc.title,
description: doc.description,
content: doc.content
}
})))
}).promise()
} catch (err) {
WIKI.logger.warn('(SEARCH/AWS) Failed to send batch to AWS CloudSearch: ', err)
}
chunks.length = 0
bytes = 0
}
await pipeline(
WIKI.models.knex.column({ id: 'hash' }, 'path', { locale: 'localeCode' }, 'title', 'description', 'content').select().from('pages').where({
isPublished: true,
isPrivate: false
}).stream(),
this.client.indexes.use(this.config.indexName).createIndexingStream()
new Transform({
objectMode: true,
transform: async (chunk, enc, cb) => await processDocument(cb, chunk),
flush: async (cb) => await processDocument(cb)
})
)
WIKI.logger.info(`(SEARCH/AWS) Requesting Index Rebuild...`)
await this.client.indexDocuments({
DomainName: this.config.domain
}).promise()
WIKI.logger.info(`(SEARCH/AWS) Index rebuilt successfully.`)
}
}