late join works (also when activating garbage collector), added some tests to verify (havent tested for large >500 operations)

package.json

@@ -4,7 +4,7 @@
   "description": "A framework for real-time p2p shared editing on arbitrary complex data types",
   "main": "y.js",
   "scripts": {
-    "test": "./node_modules/.bin/gulp test",
+    "test": "node --harmony ./node_modules/.bin/gulp test",
     "lint": "./node_modules/.bin/standard",
     "build": "./node_modules/.bin/standard build"
   },

src/Connector.js

@@ -156,13 +156,13 @@ class AbstractConnector {
         var currentStateSet = yield* this.getStateSet()
         yield* this.applyDeleteSet(m.deleteSet)
 
+        var ds = yield* this.getDeleteSet()
         var ops = yield* this.getOperations(m.stateSet)
-        ops = JSON.parse(JSON.stringify(ops)) // TODO: don't do something like that!!
         conn.send(sender, {
           type: 'sync step 2',
           os: ops,
           stateSet: currentStateSet,
-          deleteSet: yield* this.getDeleteSet()
+          deleteSet: ds
         })
         if (this.forwardToSyncingClients) {
           conn.syncingClients.push(sender)

src/Connectors/Test.js

@@ -1,4 +1,4 @@
-/* global getRandom, Y, wait */
+/* global getRandom, Y, wait, async */
 'use strict'
 
 var globalRoom = {
@@ -82,19 +82,25 @@ class Test extends Y.AbstractConnector {
       globalRoom.addUser(this)
       super.reconnect()
     }
+    return this.flushAll()
   }
   disconnect () {
     if (!this.isDisconnected()) {
       globalRoom.removeUser(this.userId)
       super.disconnect()
     }
+    return wait()
   }
   flush () {
-    var buff = globalRoom.buffers[this.userId]
+    var self = this
-    while (buff.length > 0) {
+    return async(function * () {
-      var m = buff.shift()
+      yield wait()
+      while (globalRoom.buffers[self.userId].length > 0) {
+        var m = globalRoom.buffers[self.userId].shift()
         this.receiveMessage(m[0], m[1])
+        yield wait()
       }
+    })
   }
   flushAll () {
     return new Promise(function (resolve) {
@@ -115,7 +121,7 @@ class Test extends Y.AbstractConnector {
       }
       // in the case that there are
       // still actions that want to be performed
-      wait(0).then(nextFlush)
+      wait().then(nextFlush)
     })
   }
   /*

src/Helper.spec.js

@@ -66,56 +66,68 @@ function getRandomNumber (n) {
 }
 g.getRandomNumber = getRandomNumber
 
-g.applyRandomTransactions = async(function * applyRandomTransactions (users, objects, transactions, numberOfTransactions) {
+function * applyTransactions (relAmount, numberOfTransactions, objects, users, transactions) {
   function randomTransaction (root) {
     var f = getRandom(transactions)
     f(root)
   }
-  function * applyTransactions (relAmount) {
   for (var i = 0; i < numberOfTransactions * relAmount + 1; i++) {
     var r = Math.random()
-      if (r >= 0.9) {
+    if (r >= 0.5) {
-        // 10% chance to flush
+      // 50% chance to flush
       users[0].connector.flushOne() // flushes for some user.. (not necessarily 0)
-      } else if (r >= 0.1) {
+    } else if (r >= 0.05) {
-        // 80% chance to create operation
+      // 45% chance to create operation
       randomTransaction(getRandom(objects))
     } else {
-        // 10% chance to disconnect/reconnect
+      // 5% chance to disconnect/reconnect
       var u = getRandom(users)
       if (u.connector.isDisconnected()) {
-          u.reconnect()
+        yield u.reconnect()
       } else {
-          u.disconnect()
+        yield u.disconnect()
       }
     }
     yield wait()
   }
 }
-  yield* applyTransactions(0.5)
+
+g.applyRandomTransactionsAllRejoinNoGC = async(function * applyRandomTransactions (users, objects, transactions, numberOfTransactions) {
+  yield* applyTransactions(1, numberOfTransactions, objects, users, transactions)
   yield users[0].connector.flushAll()
-  yield g.garbageCollectAllUsers(users)
   yield wait()
-  users[0].disconnect()
-  yield wait()
-  yield* applyTransactions(0.5)
-  yield users[0].connector.flushAll()
-  yield wait(50)
   for (var u in users) {
-    users[u].reconnect()
+    yield users[u].reconnect()
   }
   yield wait(100)
   yield users[0].connector.flushAll()
+  yield g.garbageCollectAllUsers(users)
+})
+
+g.applyRandomTransactionsWithGC = async(function * applyRandomTransactions (users, objects, transactions, numberOfTransactions) {
+  yield* applyTransactions(1, numberOfTransactions, objects, users.slice(1), transactions)
+  yield users[0].connector.flushAll()
+  yield g.garbageCollectAllUsers(users)
+  yield wait(100)
+  for (var u in users) {
+    // TODO: here, we enforce that two users never sync at the same time with u[0]
+    //       enforce that in the connector itself!
+    yield users[u].reconnect()
+  }
+  yield wait(100)
+  yield users[0].connector.flushAll()
+  yield wait(100)
+  yield g.garbageCollectAllUsers(users)
 })
 
 g.garbageCollectAllUsers = async(function * garbageCollectAllUsers (users) {
-  return yield wait(100)// TODO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+  // gc two times because of the two gc phases (really collect everything)
-  /*
+  yield wait(100)
   for (var i in users) {
     yield users[i].db.garbageCollect()
     yield users[i].db.garbageCollect()
   }
-  */
+  yield wait(100)
 })
 
 g.compareAllUsers = async(function * compareAllUsers (users) {
@@ -142,7 +154,6 @@ g.compareAllUsers = async(function * compareAllUsers (users) {
     })
   }
   yield users[0].connector.flushAll()
-  // gc two times because of the two gc phases (really collect everything)
   yield g.garbageCollectAllUsers(users)
 
   for (var uid = 0; uid < users.length; uid++) {
@@ -178,6 +189,8 @@ g.compareAllUsers = async(function * compareAllUsers (users) {
       u.db.requestTransaction(t1)
       yield wait()
       u.db.os.iterate(null, null, function (o) {
+        o = Y.utils.copyObject(o)
+        delete o.origin
         db1.push(o)
       })
     } else {
@@ -188,6 +201,8 @@ g.compareAllUsers = async(function * compareAllUsers (users) {
       expect(ds1).toEqual(ds2) // exported structure
       var count = 0
       u.db.os.iterate(null, null, function (o) {
+        o = Y.utils.copyObject(o)
+        delete o.origin
         expect(db1[count++]).toEqual(o)
       })
     }

src/OperationStore.js

@@ -158,6 +158,15 @@ class AbstractTransaction {
       }
     }
   }
+  /*
+    Really remove an op and all its effects.
+    The complicated case here is the Insert operation:
+    * reset left
+    * reset right
+    * reset parent.start
+    * reset parent.end
+    * reset origins of all right ops
+  */
   * garbageCollectOperation (id) {
     // check to increase the state of the respective user
     var state = yield* this.getState(id[0])
@@ -185,11 +194,45 @@ class AbstractTransaction {
         yield* this.setOperation(left)
       }
       // remove gc'd op from the right op, if it exists
+      // also reset origins of right ops
       if (o.right != null) {
         var right = yield* this.getOperation(o.right)
         right.left = o.left
+        if (Y.utils.compareIds(right.origin, o.id)) { // rights origin is o
+          // find new origin of right ops
+          // origin is the first left deleted operation
+          var neworigin = o.left
+          while (neworigin != null) {
+            var neworigin_ = yield* this.getOperation(neworigin)
+            if (neworigin_.deleted) {
+              break
+            }
+            neworigin = neworigin_.left
+          }
+
+          // reset origin of right
+          right.origin = neworigin
+
+          // reset origin of all right ops (except first right - duh!),
+          // until you find origin pointer to the left of o
+          var i = right.right == null ? null : yield* this.getOperation(right.right)
+          var ids = [o.id, o.right]
+          while (i != null && ids.some(function (id) {
+            return Y.utils.compareIds(id, i.origin)
+          })) {
+            if (Y.utils.compareIds(i.origin, o.id)) {
+              // reset origin of i
+              i.origin = neworigin
+              yield* this.setOperation(i)
+            }
+            // get next i
+            i = i.right == null ? null : yield* this.getOperation(i.right)
+          }
+        } /* otherwise, rights origin is to the left of o,
+             then there is no right op (from o), that origins in o */
         yield* this.setOperation(right)
       }
+
       // remove gc'd op from parent, if it exists
       var parent = yield* this.getOperation(o.parent)
       var setParent = false // whether to save parent to the os
@@ -255,6 +298,7 @@ class AbstractOperationStore {
     function garbageCollect () {
       return new Promise((resolve) => {
         os.requestTransaction(function * () {
+          if (os.y.connector.isSynced) {
             for (var i in os.gc2) {
               var oid = os.gc2[i]
               yield* this.garbageCollectOperation(oid)
@@ -264,6 +308,7 @@ class AbstractOperationStore {
             if (os.gcTimeout > 0) {
               os.gcInterval = setTimeout(garbageCollect, os.gcTimeout)
             }
+          }
           resolve()
         })
       })

src/OperationStores/Memory.js

@@ -4,6 +4,7 @@
 class DeleteStore extends Y.utils.RBTree {
   constructor () {
     super()
+    this.mem = []
   }
   isDeleted (id) {
     var n = this.findNodeWithUpperBound(id)
@@ -15,6 +16,7 @@ class DeleteStore extends Y.utils.RBTree {
     returns the delete node
   */
   markGarbageCollected (id) {
+    // this.mem.push(["gc", id]);
     var n = this.markDeleted(id)
     if (!n.val.gc) {
       if (n.val.id[1] < id[1]) {
@@ -23,6 +25,9 @@ class DeleteStore extends Y.utils.RBTree {
         n.val.len -= newlen
         n = this.add({id: id, len: newlen, gc: false})
       }
+      // get prev&next before adding a new operation
+      var prev = n.prev()
+      var next = n.next()
       if (id[1] < n.val.id[1] + n.val.len - 1) {
         // un-extend right
         this.add({id: [id[0], id[1] + 1], len: n.val.len - 1, gc: false})
@@ -30,8 +35,6 @@ class DeleteStore extends Y.utils.RBTree {
       }
       // set gc'd
       n.val.gc = true
-      var prev = n.prev()
-      var next = n.next()
       // can extend left?
       if (
         prev != null &&
@@ -52,7 +55,6 @@ class DeleteStore extends Y.utils.RBTree {
         super.delete(next.val.id)
       }
     }
-    return n
   }
   /*
     Mark an operation as deleted.
@@ -60,6 +62,7 @@ class DeleteStore extends Y.utils.RBTree {
     returns the delete node
   */
   markDeleted (id) {
+    // this.mem.push(["del", id]);
     var n = this.findNodeWithUpperBound(id)
     if (n != null && n.val.id[0] === id[0]) {
       if (n.val.id[1] <= id[1] && id[1] < n.val.id[1] + n.val.len) {
@@ -85,9 +88,11 @@ class DeleteStore extends Y.utils.RBTree {
     ) {
       n.val.len = n.val.len + next.val.len
       super.delete(next.val.id)
-    }
+      return this.findNode(n.val.id)
+    } else {
       return n
     }
+  }
   /*
     A DeleteSet (ds) describes all the deleted ops in the OS
   */

src/OperationStores/Memory.spec.js

@@ -83,10 +83,8 @@ describe('Memory', function () {
     })
     it('Debug #5', async(function * (done) {
       var store = new Y.Memory(null, {
-        db: {
         name: 'Memory',
         gcTimeout: -1
-        }
       })
       store.requestTransaction(function * () {
         yield* this.applyDeleteSet({'16': [[1, 2, false]], '17': [[0, 1, true], [1, 3, false]]})
@@ -98,10 +96,8 @@ describe('Memory', function () {
     }))
     it('Debug #6', async(function * (done) {
       var store = new Y.Memory(null, {
-        db: {
         name: 'Memory',
         gcTimeout: -1
-        }
       })
       store.requestTransaction(function * () {
         yield* this.applyDeleteSet({'40': [[0, 3, false]]})
@@ -111,5 +107,23 @@ describe('Memory', function () {
         done()
       })
     }))
+    it('Debug #7', function () {
+      ds.markDeleted(['9', 2])
+      ds.markDeleted(['11', 2])
+      ds.markDeleted(['11', 4])
+      ds.markDeleted(['11', 1])
+      ds.markDeleted(['9', 4])
+      ds.markDeleted(['10', 0])
+      ds.markGarbageCollected(['11', 2])
+      ds.markDeleted(['11', 2])
+      ds.markGarbageCollected(['11', 3])
+      ds.markDeleted(['11', 3])
+      ds.markDeleted(['11', 3])
+      ds.markDeleted(['9', 4])
+      ds.markDeleted(['10', 0])
+      ds.markGarbageCollected(['11', 1])
+      ds.markDeleted(['11', 1])
+      expect(ds.toDeleteSet()).toEqual({'9': [[2, 1, false], [4, 1, false]], '10': [[0, 1, false]], '11': [[1, 3, true], [4, 1, false]]})
+    })
   })
 })

src/Types/Array.spec.js

@@ -1,7 +1,7 @@
-/* global createUsers, wait, Y, compareAllUsers, getRandomNumber, applyRandomTransactions, async, garbageCollectAllUsers, describeManyTimes */
+/* global createUsers, wait, Y, compareAllUsers, getRandomNumber, applyRandomTransactionsAllRejoinNoGC, applyRandomTransactionsWithGC, async, garbageCollectAllUsers, describeManyTimes */
 /* eslint-env browser,jasmine */
 
-var numberOfYArrayTests = 10
+var numberOfYArrayTests = 100
 var repeatArrayTests = 1
 
 describe('Array Type', function () {
@@ -71,11 +71,8 @@ describe('Array Type', function () {
       l2 = yield y2.get('Array')
       l2.insert(1, [2])
       l2.insert(1, [3])
-      yield flushAll()
+      yield yconfig2.reconnect()
-      yconfig2.reconnect()
+      yield yconfig3.reconnect()
-      yconfig3.reconnect()
-      yield wait()
-      yield flushAll()
       expect(l1.toArray()).toEqual(l2.toArray())
       done()
     }))
@@ -84,15 +81,12 @@ describe('Array Type', function () {
       l1 = yield y1.set('Array', Y.Array)
       l1.insert(0, ['x', 'y'])
       yield flushAll()
-      yconfig2.disconnect()
+      yield yconfig2.disconnect()
       yield wait()
       l2 = yield y2.get('Array')
       l2.delete(1, 1)
       l1.delete(0, 2)
-      yield flushAll()
+      yield yconfig2.reconnect()
-      yconfig2.reconnect()
-      yield wait()
-      yield flushAll()
       expect(l1.toArray()).toEqual(l2.toArray())
       done()
     }))
@@ -130,7 +124,7 @@ describe('Array Type', function () {
       l1.delete(0, 3)
       l2 = yield y2.get('Array')
       yield wait()
-      yconfig2.reconnect()
+      yield yconfig2.reconnect()
       yield wait()
       l3 = yield y3.get('Array')
       yield flushAll()
@@ -148,7 +142,7 @@ describe('Array Type', function () {
       yconfig1.disconnect()
       l1.delete(0, 3)
       l2 = yield y2.get('Array')
-      yconfig1.reconnect()
+      yield yconfig1.reconnect()
       l3 = yield y3.get('Array')
       yield flushAll()
       expect(l1.toArray()).toEqual(l2.toArray())
@@ -188,7 +182,7 @@ describe('Array Type', function () {
       l1.delete(0, 3)
       l2 = yield y2.get('Array')
       yield wait()
-      yconfig1.reconnect()
+      yield yconfig1.reconnect()
       yield wait()
       l3 = yield y3.get('Array')
       yield flushAll()
@@ -238,11 +232,21 @@ describe('Array Type', function () {
       expect(this.arrays.length).toEqual(this.users.length)
       done()
     }))
-    it(`succeed after ${numberOfYArrayTests} actions`, async(function * (done) {
+    it(`succeed after ${numberOfYArrayTests} actions, no GC, all users disconnecting/reconnecting`, async(function * (done) {
       for (var u of this.users) {
         u.connector.debug = true
       }
-      yield applyRandomTransactions(this.users, this.arrays, randomArrayTransactions, numberOfYArrayTests)
+      yield applyRandomTransactionsAllRejoinNoGC(this.users, this.arrays, randomArrayTransactions, numberOfYArrayTests)
+      yield flushAll()
+      yield compareArrayValues(this.arrays)
+      yield compareAllUsers(this.users)
+      done()
+    }))
+    it(`succeed after ${numberOfYArrayTests} actions, GC, user[0] is not disconnecting`, async(function * (done) {
+      for (var u of this.users) {
+        u.connector.debug = true
+      }
+      yield applyRandomTransactionsWithGC(this.users, this.arrays, randomArrayTransactions, numberOfYArrayTests)
       yield flushAll()
       yield compareArrayValues(this.arrays)
       yield compareAllUsers(this.users)

src/Types/Map.spec.js

@@ -1,4 +1,4 @@
-/* global createUsers, Y, compareAllUsers, getRandomNumber, applyRandomTransactions, async, describeManyTimes */
+/* global createUsers, Y, compareAllUsers, getRandomNumber, applyRandomTransactionsAllRejoinNoGC, applyRandomTransactionsWithGC, async, describeManyTimes */
 /* eslint-env browser,jasmine */
 
 var numberOfYMapTests = 100
@@ -201,8 +201,14 @@ describe('Map Type', function () {
       this.maps = yield Promise.all(promises)
       done()
     }))
-    it(`succeed after ${numberOfYMapTests} actions`, async(function * (done) {
+    it(`succeed after ${numberOfYMapTests} actions, no GC, all users disconnecting/reconnecting`, async(function * (done) {
-      yield applyRandomTransactions(this.users, this.maps, randomMapTransactions, numberOfYMapTests)
+      yield applyRandomTransactionsAllRejoinNoGC(this.users, this.maps, randomMapTransactions, numberOfYMapTests)
+      yield flushAll()
+      yield compareMapValues(this.maps)
+      done()
+    }))
+    it(`succeed after ${numberOfYMapTests} actions, GC, user[0] is not disconnecting`, async(function * (done) {
+      yield applyRandomTransactionsWithGC(this.users, this.maps, randomMapTransactions, numberOfYMapTests)
       yield flushAll()
       yield compareMapValues(this.maps)
       done()

src/y.js

@@ -33,13 +33,13 @@ class YConfig {
     return this.connector.isSynced
   }
   disconnect () {
-    this.connector.disconnect()
+    return this.connector.disconnect()
   }
   reconnect () {
-    this.connector.reconnect()
+    return this.connector.reconnect()
   }
   destroy () {
-    this.connector.disconnect()
+    this.disconnect()
     this.db.destroy()
     this.connector = null
     this.db = null