Use global cache passed through corestore if available

index.js

@@ -47,7 +47,7 @@ module.exports = class Autobase extends ReadyResource {
     this.keyPair = handlers.keyPair || null
     this.valueEncoding = c.from(handlers.valueEncoding || 'binary')
     this.store = store
-
+    this.globalCache = store.globalCache || null
     this.encrypted = handlers.encrypted || !!handlers.encryptionKey
     this.encryptionKey = handlers.encryptionKey || null
 
@@ -131,8 +131,6 @@ module.exports = class Autobase extends ReadyResource {
     this.system = null
     this.version = -1
 
-    this.maxCacheSize = handlers.maxCacheSize || 0 // 0 means the hyperbee default cache size will be used
-
     const {
       ackInterval = DEFAULT_ACK_INTERVAL,
       ackThreshold = DEFAULT_ACK_THRESHOLD
@@ -155,8 +153,7 @@ module.exports = class Autobase extends ReadyResource {
     const sysCore = this._viewStore.get({ name: '_system', exclusive: true })
 
     this.system = new SystemView(sysCore, {
-      checkout: 0,
-      maxCacheSize: this.maxCacheSize
+      checkout: 0
     })
 
     this.view = this._hasOpen ? this._handlers.open(this._viewStore, this) : null
@@ -325,8 +322,7 @@ module.exports = class Autobase extends ReadyResource {
     }
 
     const system = new SystemView(core, {
-      checkout: length,
-      maxCacheSize: this.maxCacheSize
+      checkout: length
     })
 
     await system.ready()
@@ -419,8 +415,7 @@ module.exports = class Autobase extends ReadyResource {
 
     const base = this
     const system = new SystemView(core, {
-      checkout: length,
-      maxCacheSize: this.maxCacheSize
+      checkout: length
     })
 
     await system.ready()

lib/core.js

@@ -106,6 +106,8 @@ class AutocoreSession extends EventEmitter {
     this._index = source.sessions.push(this) - 1
     this._snapshot = snapshot
 
+    this.globalCache = this.base.globalCache
+
     this.ready().catch(safetyCatch)
   }
 

lib/system.js

@@ -12,13 +12,13 @@ const DIGEST = subs.sub(b4a.from([0]))
 const MEMBERS = subs.sub(b4a.from([1]))
 
 module.exports = class SystemView extends ReadyResource {
-  constructor (core, { checkout = 0, maxCacheSize = 0 } = {}) {
+  constructor (core, { checkout = 0 } = {}) {
     super()
 
     this.core = core
 
     // sessions is a workaround for batches not having sessions atm...
-    this.db = new Hyperbee(core, { keyEncoding: 'binary', extension: false, checkout, sessions: typeof core.session === 'function', maxCacheSize })
+    this.db = new Hyperbee(core, { keyEncoding: 'binary', extension: false, checkout, sessions: typeof core.session === 'function' })
 
     this.version = -1 // set version in apply
     this.members = 0
@@ -68,10 +68,9 @@ module.exports = class SystemView extends ReadyResource {
     }
   }
 
-  async checkout (length, { maxCacheSize = this.db.maxCacheSize } = {}) {
+  async checkout (length) {
     const checkout = new SystemView(this.core.session(), {
-      checkout: length,
-      maxCacheSize
+      checkout: length
     })
 
     await checkout.ready()

package.json

@@ -36,7 +36,7 @@
     "core-coupler": "^1.0.0",
     "debounceify": "^1.0.0",
     "hyperbee": "^2.15.0",
-    "hypercore": "^10.37.1",
+    "hypercore": "holepunchto/hypercore#rache-global-approach",
     "hypercore-crypto": "^3.4.0",
     "hypercore-id-encoding": "^1.2.0",
     "mutexify": "^1.4.0",
@@ -50,7 +50,8 @@
   "devDependencies": {
     "autobase-test-helpers": "^2.0.1",
     "brittle": "^3.1.1",
-    "corestore": "^6.16.1",
+    "corestore": "holepunchto/corestore#global-cache-opt",
+    "rache": "^1.0.0",
     "random-access-memory": "^6.2.0",
     "same-data": "^1.0.0",
     "standard": "^17.0.0",

test/basic.js

@@ -3,6 +3,7 @@ const ram = require('random-access-memory')
 const Corestore = require('corestore')
 const b4a = require('b4a')
 const crypto = require('hypercore-crypto')
+const Rache = require('rache')
 
 const Autobase = require('..')
 
@@ -1616,19 +1617,16 @@ test('basic - writer adds a writer while being removed', async t => {
   t.is(binfo.isRemoved, true)
 })
 
-test('basic - maxCacheSize opt', async t => {
-  const [store] = await createStores(1, t)
-  const base = new Autobase(store.namespace('with-cache'), null, { maxCacheSize: 10 })
-  await base.ready()
-  t.is(base.maxCacheSize, 10, 'maxCacheSize set')
-  t.is(base.system.db.maxCacheSize, 10, 'maxCacheSize applied to sys db')
-})
+test('basic - sessions use globalCache from corestore if it is set', async t => {
+  const globalCache = new Rache()
 
-test('basic - maxCacheSize has 0 default', async t => {
-  const [store] = await createStores(1, t)
-  const base = new Autobase(store.namespace('with-cache'))
+  const [store] = await createStores(1, t, { globalCache })
+  const base = createBase(store, null, t)
   await base.ready()
-  t.is(base.maxCacheSize, 0, 'maxCacheSize default 0')
+
+  t.is(base.globalCache, globalCache, 'globalCache set on autobase itself')
+  t.is(base.view.globalCache, globalCache, 'passed to autocore sessions')
+  t.is(base.system.core.globalCache, globalCache, 'passed to system')
 })
 
 // todo: this test is hard, probably have to rely on ff to recover

test/helpers/index.js

@@ -31,7 +31,8 @@ async function createStores (n, t, opts = {}) {
   const stores = []
   for (let i = offset; i < n + offset; i++) {
     const primaryKey = Buffer.alloc(32, i)
-    stores.push(new Corestore(await storage(), { primaryKey, encryptionKey }))
+    const globalCache = opts.globalCache || null
+    stores.push(new Corestore(await storage(), { primaryKey, encryptionKey, globalCache }))
   }
 
   t.teardown(() => Promise.all(stores.map(s => s.close())), { order: 2 })