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Merge pull request #76 from ipfs/pull
[WIP] Move to pull-streams
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| Original file line number | Diff line number | Diff line change |
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@@ -3,6 +3,7 @@ language: node_js | |
| node_js: | ||
| - 4 | ||
| - 5 | ||
| - stable | ||
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| # Make sure we have new NPM. | ||
| before_install: | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,53 +1,56 @@ | ||
| 'use strict' | ||
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| const assert = require('assert') | ||
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| const stores = require('./stores') | ||
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| function Repo (repoPath, options) { | ||
| if (!(this instanceof Repo)) { | ||
| return new Repo(repoPath, options) | ||
| module.exports = class Repo { | ||
| constructor (repoPath, options) { | ||
| assert.equal(typeof repoPath, 'string', 'missing repoPath') | ||
| assert(options, 'missing options') | ||
| assert(options.stores, 'missing options.stores') | ||
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| this.path = repoPath | ||
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| const blobStores = initializeBlobStores(options.stores) | ||
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| const setup = (name, needs) => { | ||
| needs = needs || {} | ||
| const args = [repoPath, blobStores[name]] | ||
| if (needs.locks) { | ||
| args.push(this.locks) | ||
| } | ||
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| if (needs.config) { | ||
| args.push(this.config) | ||
| } | ||
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| return stores[name].setUp.apply(stores[name], args) | ||
| } | ||
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| this.locks = setup('locks') | ||
| this.version = setup('version', {locks: true}) | ||
| this.config = setup('config', {locks: true}) | ||
| this.keys = setup('keys', {locks: true, config: true}) | ||
| this.blockstore = setup('blockstore', {locks: true}) | ||
| } | ||
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| exists (callback) { | ||
| this.version.exists(callback) | ||
| } | ||
| if (!options) { throw new Error('missing options param') } | ||
| if (!options.stores) { throw new Error('missing options.stores param') } | ||
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| // If options.stores is an abstract-blob-store instead of a map, use it for | ||
| // all stores. | ||
| if (options.stores.prototype && options.stores.prototype.createWriteStream) { | ||
| const store = options.stores | ||
| options.stores = { | ||
| } | ||
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| function initializeBlobStores (store) { | ||
| if (store.constructor) { | ||
| return { | ||
| keys: store, | ||
| config: store, | ||
| datastore: store, | ||
| blockstore: store, | ||
| logs: store, | ||
| locks: store, | ||
| version: store | ||
| } | ||
| } | ||
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| this.path = repoPath | ||
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| this.locks = stores | ||
| .locks | ||
| .setUp(repoPath, options.stores.locks) | ||
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| this.exists = (callback) => { | ||
| this.version.exists(callback) | ||
| } | ||
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| this.version = stores | ||
| .version | ||
| .setUp(repoPath, options.stores.version, this.locks) | ||
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| this.config = stores | ||
| .config | ||
| .setUp(repoPath, options.stores.config, this.locks) | ||
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| this.keys = stores | ||
| .keys | ||
| .setUp(repoPath, options.stores.keys, this.locks, this.config) | ||
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| this.datastore = stores | ||
| .datastore | ||
| .setUp(repoPath, options.stores.datastore, this.locks) | ||
| return store | ||
| } | ||
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| exports = module.exports = Repo |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,137 @@ | ||
| 'use strict' | ||
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| const Block = require('ipfs-block') | ||
| const pull = require('pull-stream') | ||
| const Lock = require('lock') | ||
| const base32 = require('base32.js') | ||
| const path = require('path') | ||
| const write = require('pull-write') | ||
| const parallel = require('run-parallel') | ||
| const through = require('pull-through') | ||
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| const PREFIX_LENGTH = 5 | ||
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| exports = module.exports | ||
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| function multihashToPath (multihash, extension) { | ||
| extension = extension || 'data' | ||
| const encoder = new base32.Encoder() | ||
| const hash = encoder.write(multihash).finalize() | ||
| const filename = `${hash}.${extension}` | ||
| const folder = filename.slice(0, PREFIX_LENGTH) | ||
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| return path.join(folder, filename) | ||
| } | ||
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| exports.setUp = (basePath, BlobStore, locks) => { | ||
| const store = new BlobStore(basePath + '/blocks') | ||
| const lock = new Lock() | ||
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| function writeBlock (block, cb) { | ||
| if (!block || !block.data) { | ||
| return cb(new Error('Invalid block')) | ||
| } | ||
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| const key = multihashToPath(block.key, block.extension) | ||
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| lock(key, (release) => pull( | ||
| pull.values([block.data]), | ||
| store.write(key, release((err) => { | ||
| if (err) { | ||
| return cb(err) | ||
| } | ||
| cb(null, {key}) | ||
| })) | ||
| )) | ||
| } | ||
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| return { | ||
| getStream (key, extension) { | ||
| if (!key) { | ||
| return pull.error(new Error('Invalid key')) | ||
| } | ||
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| const p = multihashToPath(key, extension) | ||
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| const ext = extension === 'data' ? 'protobuf' : extension | ||
| let data = [] | ||
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| return pull( | ||
| store.read(p), | ||
| through(function (values) { | ||
| data = data.concat(values) | ||
| }, function () { | ||
| this.queue(new Block(Buffer.concat(data), ext)) | ||
| this.queue(null) | ||
| }) | ||
| ) | ||
| }, | ||
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| putStream () { | ||
| let ended = false | ||
| let written = [] | ||
| let push = null | ||
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| const sink = write((blocks, cb) => { | ||
| parallel(blocks.map((block) => (cb) => { | ||
| writeBlock(block, (err, meta) => { | ||
| if (err) return cb(err) | ||
| if (push) { | ||
| const read = push | ||
| push = null | ||
| read(null, meta) | ||
| return cb() | ||
| } | ||
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| written.push(meta) | ||
| cb() | ||
| }) | ||
| }), cb) | ||
| }, null, 100, (err) => { | ||
| ended = err || true | ||
| if (push) push(ended) | ||
| }) | ||
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| const source = (end, cb) => { | ||
| if (end) ended = end | ||
| if (ended) return cb(ended) | ||
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| if (written.length) { | ||
| return cb(null, written.shift()) | ||
| } | ||
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| push = cb | ||
| } | ||
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| return {source, sink} | ||
| }, | ||
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| has (key, extension, cb) { | ||
| if (typeof extension === 'function') { | ||
| cb = extension | ||
| extension = undefined | ||
| } | ||
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| if (!key) { | ||
| return cb(new Error('Invalid key')) | ||
| } | ||
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| const p = multihashToPath(key, extension) | ||
| store.exists(p, cb) | ||
| }, | ||
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| delete (key, extension, cb) { | ||
| if (typeof extension === 'function') { | ||
| cb = extension | ||
| extension = undefined | ||
| } | ||
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| if (!key) { | ||
| return cb(new Error('Invalid key')) | ||
| } | ||
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| const p = multihashToPath(key, extension) | ||
| store.remove(p, cb) | ||
| } | ||
| } | ||
| } |
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