vega-dataflow - npm Package Compare versions

Comparing version 1.3.2 to 1.4.0

package.json

 {
   "name": "vega-dataflow",
-  "version": "1.3.2",
+  "version": "1.4.0",
   "description": "Vega streaming dataflow graph.",
@@ -5,0 +5,0 @@ "repository": {

src/DataSource.js

@@ -1,3 +0,4 @@
-var log = require('vega-logging'),
-    ChangeSet = require('./ChangeSet'), 
+var dl = require('datalib'),
+    log = require('vega-logging'),
+    ChangeSet = require('./ChangeSet'),
     Collector = require('./Collector'),
@@ -15,2 +16,4 @@ Tuple = require('./Tuple'),
   this._output = null; // Output changeset
+  this._indexes = {};
+  this._indexFields = [];
 
@@ -115,2 +118,29 @@ this._inputNode  = null;
 prototype.synchronize = function() {
+  // update indices
+  var pulse = this.last(),
+      fields = this._indexFields,
+      i, j, f, key, index, value;
+
+  for (i=0; i<fields.length; ++i) {
+    key = fields[i];
+    index = this._indexes[key];
+    f = dl.$(key);
+
+    for (j=0; j<pulse.add.length; ++j) {
+      value = f(pulse.add[j]);
+      Tuple.prev_init(pulse.add[j]);
+      index[value] = (index[value] || 0) + 1;
+    }
+    for (j=0; j<pulse.rem.length; ++j) {
+      value = f(pulse.rem[j]);
+      index[value] = (index[value] || 0) - 1;
+    }
+    for (j=0; j<pulse.mod.length; ++j) {
+      value = f(pulse.mod[j]._prev);
+      index[value] = (index[value] || 0) - 1;
+      value = f(pulse.mod[j]);
+      index[value] = (index[value] || 0) + 1;
+    }
+  }
+
   this._graph.synchronize(this._pipeline);
@@ -120,3 +150,21 @@ return this;
 
-prototype.listener = function() { 
+prototype.getIndex = function(field) {
+  var data = this.values(),
+      f = dl.$(field),
+      index, i, len, value;
+
+  if (!this._indexes[field]) {
+    index = {};
+    this._indexes[field] = index;
+    this._indexFields.push(field);
+    for (i=0, len=data.length; i<len; ++i) {
+      value = f(this._data[i]);
+      index[value] = (index[value] || 0) + 1;
+      Tuple.prev_init(this._data[i]);
+    }
+  }
+  return this._indexes[field];
+};
+
+prototype.listener = function() {
   return DataSourceListener(this).addListener(this._inputNode);
@@ -129,3 +177,3 @@ };
   } else {
-    this._outputNode.addListener(l);      
+    this._outputNode.addListener(l);
   }
@@ -143,3 +191,3 @@ return this;
 
-// Input node applies the datasource's delta, and propagates it to 
+// Input node applies the datasource's delta, and propagates it to
 // the rest of the pipeline. It receives touches to reflow data.
@@ -158,3 +206,3 @@ function DataSourceInput(ds) {
 
-    var delta = ds._input, 
+    var delta = ds._input,
         out = ChangeSet.create(input), f;
@@ -189,3 +237,3 @@
 
-    out.add = delta.add; 
+    out.add = delta.add;
     out.mod = delta.mod;
@@ -237,3 +285,3 @@ out.rem = delta.rem;
     // operators that mutate, and thus would override the source data.
-    if (ds.mutates()) {  
+    if (ds.mutates()) {
       var map = ds._srcMap || (ds._srcMap = {}), // to propagate tuples correctly
@@ -250,3 +298,3 @@ output = ChangeSet.create(input);
 
-      output.rem = input.rem.map(function(t) { 
+      output.rem = input.rem.map(function(t) {
         var o = map[t._id];
@@ -253,0 +301,0 @@ return (map[t._id] = null, o);

src/Graph.js

@@ -96,3 +96,3 @@ var dl = require('datalib'),
 // which need to be populated during the same cycle even though propagation has
-// passed that part of the dataflow graph.  
+// passed that part of the dataflow graph.
 prototype.propagate = function(pulse, node, stamp) {
@@ -131,3 +131,3 @@ var pulses = {},
 
-      // Propagate the pulse. 
+      // Propagate the pulse.
       if (pulse !== this.doNotPropagate) {
@@ -147,3 +147,3 @@ // Ensure reflow pulses always send reflow pulses even if skipped.
             // We've already queued this node. Ensure there should be at most one
-            // pulse with tuples (add/mod/rem), and the remainder will be reflows. 
+            // pulse with tuples (add/mod/rem), and the remainder will be reflows.
             tpls  = pulse.add.length || pulse.mod.length || pulse.rem.length;
@@ -154,3 +154,3 @@ ntpls = nplse.add.length || nplse.mod.length || nplse.rem.length;
 
-            // Combine reflow and tuples into a single pulse. 
+            // Combine reflow and tuples into a single pulse.
             pulses[next._id] = tpls ? pulse : nplse;
@@ -171,3 +171,3 @@ pulses[next._id].reflow = pulse.reflow || nplse.reflow;
 
-// Perform final bookkeeping on the graph, after propagation is complete. 
+// Perform final bookkeeping on the graph, after propagation is complete.
 //  - For all updated datasources, synchronize their previous values.
@@ -181,3 +181,3 @@ prototype.done = function(pulse) {
 // Process a new branch of the dataflow graph prior to connection:
-// (1) Insert new Collector nodes as needed. 
+// (1) Insert new Collector nodes as needed.
 // (2) Track + return mutation/routing status of the branch.
@@ -192,3 +192,3 @@ prototype.preprocess = function(branch) {
 
-    // Batch nodes need access to a materialized dataset. 
+    // Batch nodes need access to a materialized dataset.
     if (node.batch() && !node._collector) {
@@ -284,5 +284,5 @@ if (router || !collector) {
       id = (d = data[j])._id;
-      if (ids[id]) continue; 
+      if (ids[id]) continue;
       Tuple.prev_update(d);
-      ids[id] = 1; 
+      ids[id] = 1;
     }
@@ -289,0 +289,0 @@ }

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Improved metrics

Total package byte prevSize

530259

increased by1.58%

Lines of code

7148

increased by1.94%

No dependency changes