NIFI-6126 - throttle requests to refresh the canvas to prevent too many server requests when holding down CTRL-R

* Added lodash utility library to leverage its throttle capability (and many other useful functions in the future).
* Made lodash available in all JSP's so it could be imported into nf-common (or any component for that matter).
* Added a throttle function to nf-common that just wraps _.throttle

This closes #3393

nifi-assembly/LICENSE

@@ -2218,4 +2218,52 @@ style license.
     OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     SOFTWARE.
 
-      
+This product bundles 'lodash' which is available under an MIT license.
+
+    Copyright JS Foundation and other contributors <https://js.foundation/>
+
+    Based on Underscore.js, copyright Jeremy Ashkenas,
+    DocumentCloud and Investigative Reporters & Editors <http://underscorejs.org/>
+
+    This software consists of voluntary contributions made by many
+    individuals. For exact contribution history, see the revision history
+    available at https://github.com/lodash/lodash
+
+    The following license applies to all parts of this software except as
+    documented below:
+
+    ====
+
+    Permission is hereby granted, free of charge, to any person obtaining
+    a copy of this software and associated documentation files (the
+    "Software"), to deal in the Software without restriction, including
+    without limitation the rights to use, copy, modify, merge, publish,
+    distribute, sublicense, and/or sell copies of the Software, and to
+    permit persons to whom the Software is furnished to do so, subject to
+    the following conditions:
+
+    The above copyright notice and this permission notice shall be
+    included in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+    LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+    OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+    ====
+
+    Copyright and related rights for sample code are waived via CC0. Sample
+    code is defined as all source code displayed within the prose of the
+    documentation.
+
+    CC0: http://creativecommons.org/publicdomain/zero/1.0/
+
+    ====
+
+    Files located in the node_modules and vendor directories are externally
+    maintained libraries used by this software which have their own
+    licenses; we recommend you read them, as their terms may differ from the
+    terms above.

nifi-nar-bundles/nifi-framework-bundle/nifi-framework-nar/src/main/resources/META-INF/LICENSE

@@ -804,3 +804,52 @@ For details see http://asm.ow2.org/asmdex-license.html
     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     THE POSSIBILITY OF SUCH DAMAGE.
 
+This product bundles 'lodash' which is available under an MIT license.
+
+    Copyright JS Foundation and other contributors <https://js.foundation/>
+
+    Based on Underscore.js, copyright Jeremy Ashkenas,
+    DocumentCloud and Investigative Reporters & Editors <http://underscorejs.org/>
+
+    This software consists of voluntary contributions made by many
+    individuals. For exact contribution history, see the revision history
+    available at https://github.com/lodash/lodash
+
+    The following license applies to all parts of this software except as
+    documented below:
+
+    ====
+
+    Permission is hereby granted, free of charge, to any person obtaining
+    a copy of this software and associated documentation files (the
+    "Software"), to deal in the Software without restriction, including
+    without limitation the rights to use, copy, modify, merge, publish,
+    distribute, sublicense, and/or sell copies of the Software, and to
+    permit persons to whom the Software is furnished to do so, subject to
+    the following conditions:
+
+    The above copyright notice and this permission notice shall be
+    included in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+    LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+    OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+    ====
+
+    Copyright and related rights for sample code are waived via CC0. Sample
+    code is defined as all source code displayed within the prose of the
+    documentation.
+
+    CC0: http://creativecommons.org/publicdomain/zero/1.0/
+
+    ====
+
+    Files located in the node_modules and vendor directories are externally
+    maintained libraries used by this software which have their own
+    licenses; we recommend you read them, as their terms may differ from the
+    terms above.

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/pom.xml

@@ -235,6 +235,10 @@
                                         <include>url-search-params/build/url-search-params.js</include>
                                         <include>url-search-params/README.md</include>
                                         <include>url-search-params/LICENSE.txt</include>
+
+                                        <include>lodash-core/distrib/lodash-core.min.js</include>
+                                        <include>lodash-core/distrib/README.md</include>
+
                                     </includes>
                                 </resource>
                             </resources>

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/frontend/package-lock.json

@@ -427,6 +427,11 @@
         "nomnom": "1.8.1"
       }
     },
+    "lodash-core": {
+      "version": "4.17.11",
+      "resolved": "https://registry.npmjs.org/lodash-core/-/lodash-core-4.17.11.tgz",
+      "integrity": "sha512-8ilprNE67U1REh0wQHL0z37qXdsxuFXjvxehg79Mh/MQgNJ+C1muXtysSKpt9sCxXZUSiwifEC82Vtzf2GSSKQ=="
+    },
     "nomnom": {
       "version": "1.8.1",
       "resolved": "https://registry.npmjs.org/nomnom/-/nomnom-1.8.1.tgz",

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/frontend/package.json

@@ -34,6 +34,7 @@
     "jquery": "3.1.1",
     "reset.css": "2.0.2",
     "jquery-form": "3.50.0",
+    "lodash-core": "4.17.11",
     "url-search-params": "0.6.1",
     "jsonlint": "1.6.2",
     "qtip2": "3.0.3",

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/resources/META-INF/LICENSE

@@ -721,3 +721,53 @@ This product bundles 'jsonlint' which is available under an MIT license.
     LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     THE SOFTWARE.
+
+This product bundles 'lodash' which is available under an MIT license.
+
+    Copyright JS Foundation and other contributors <https://js.foundation/>
+
+    Based on Underscore.js, copyright Jeremy Ashkenas,
+    DocumentCloud and Investigative Reporters & Editors <http://underscorejs.org/>
+
+    This software consists of voluntary contributions made by many
+    individuals. For exact contribution history, see the revision history
+    available at https://github.com/lodash/lodash
+
+    The following license applies to all parts of this software except as
+    documented below:
+
+    ====
+
+    Permission is hereby granted, free of charge, to any person obtaining
+    a copy of this software and associated documentation files (the
+    "Software"), to deal in the Software without restriction, including
+    without limitation the rights to use, copy, modify, merge, publish,
+    distribute, sublicense, and/or sell copies of the Software, and to
+    permit persons to whom the Software is furnished to do so, subject to
+    the following conditions:
+
+    The above copyright notice and this permission notice shall be
+    included in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+    LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+    OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+    ====
+
+    Copyright and related rights for sample code are waived via CC0. Sample
+    code is defined as all source code displayed within the prose of the
+    documentation.
+
+    CC0: http://creativecommons.org/publicdomain/zero/1.0/
+
+    ====
+
+    Files located in the node_modules and vendor directories are externally
+    maintained libraries used by this software which have their own
+    licenses; we recommend you read them, as their terms may differ from the
+    terms above.

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/WEB-INF/pages/bulletin-board.jsp

@@ -38,6 +38,7 @@
         <script type="text/javascript" src="js/jquery/jquery.ellipsis.js"></script>
         <script type="text/javascript" src="js/jquery/jquery.each.js"></script>
         <script type="text/javascript" src="assets/jquery-ui-dist/jquery-ui.min.js"></script>
+        <script type="text/javascript" src="assets/lodash-core/distrib/lodash-core.min.js"></script>
         <script type="text/javascript" src="assets/qtip2/dist/jquery.qtip.min.js"></script>
         <script type="text/javascript" src="assets/angular/angular.min.js"></script>
         <script type="text/javascript" src="assets/angular-messages/angular-messages.min.js"></script>

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/WEB-INF/pages/canvas.jsp

@@ -60,6 +60,7 @@
         <script type="text/javascript" src="js/jquery/combo/jquery.combo.js?${project.version}"></script>
         <script type="text/javascript" src="js/jquery/modal/jquery.modal.js?${project.version}"></script>
         <script type="text/javascript" src="assets/jquery-minicolors/jquery.minicolors.min.js"></script>
+        <script type="text/javascript" src="assets/lodash-core/distrib/lodash-core.min.js"></script>
         <script type="text/javascript" src="assets/qtip2/dist/jquery.qtip.min.js"></script>
         <script type="text/javascript" src="assets/slickgrid/lib/jquery.event.drag-2.3.0.js"></script>
         <script type="text/javascript" src="assets/slickgrid/plugins/slick.cellrangeselector.js"></script>

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/WEB-INF/pages/cluster.jsp

@@ -42,6 +42,7 @@
         <script type="text/javascript" src="js/jquery/jquery.ellipsis.js"></script>
         <script type="text/javascript" src="js/jquery/jquery.each.js"></script>
         <script type="text/javascript" src="assets/jquery-ui-dist/jquery-ui.min.js"></script>
+        <script type="text/javascript" src="assets/lodash-core/distrib/lodash-core.min.js"></script>
         <script type="text/javascript" src="assets/qtip2/dist/jquery.qtip.min.js"></script>
         <script type="text/javascript" src="assets/slickgrid/lib/jquery.event.drag-2.3.0.js"></script>
         <script type="text/javascript" src="assets/slickgrid/plugins/slick.cellrangeselector.js"></script>

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/WEB-INF/pages/counters.jsp

@@ -40,6 +40,7 @@
         <script type="text/javascript" src="js/jquery/jquery.ellipsis.js"></script>
         <script type="text/javascript" src="js/jquery/jquery.each.js"></script>
         <script type="text/javascript" src="assets/jquery-ui-dist/jquery-ui.min.js"></script>
+        <script type="text/javascript" src="assets/lodash-core/distrib/lodash-core.min.js"></script>
         <script type="text/javascript" src="assets/qtip2/dist/jquery.qtip.min.js"></script>
         <script type="text/javascript" src="assets/slickgrid/lib/jquery.event.drag-2.3.0.js"></script>
         <script type="text/javascript" src="assets/slickgrid/plugins/slick.cellrangeselector.js"></script>

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/WEB-INF/pages/history.jsp

@@ -40,6 +40,7 @@
         <script type="text/javascript" src="js/jquery/jquery.ellipsis.js"></script>
         <script type="text/javascript" src="js/jquery/jquery.each.js"></script>
         <script type="text/javascript" src="assets/jquery-ui-dist/jquery-ui.min.js"></script>
+        <script type="text/javascript" src="assets/lodash-core/distrib/lodash-core.min.js"></script>
         <script type="text/javascript" src="assets/qtip2/dist/jquery.qtip.min.js"></script>
         <script type="text/javascript" src="assets/slickgrid/lib/jquery.event.drag-2.3.0.js"></script>
         <script type="text/javascript" src="assets/slickgrid/plugins/slick.cellrangeselector.js"></script>

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/WEB-INF/pages/login.jsp

@@ -39,6 +39,7 @@
         <script type="text/javascript" src="assets/qtip2/dist/jquery.qtip.min.js"></script>
         <script type="text/javascript" src="assets/jquery-ui-dist/jquery-ui.min.js"></script>
         <script type="text/javascript" src="js/nf/nf-namespace.js?${project.version}"></script>
+        <script type="text/javascript" src="assets/lodash-core/distrib/lodash-core.min.js"></script>
         ${nf.login.script.tags}
     </head>
     <body class="login-body">

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/WEB-INF/pages/provenance.jsp

@@ -44,6 +44,7 @@
         <script type="text/javascript" src="js/jquery/jquery.ellipsis.js"></script>
         <script type="text/javascript" src="js/jquery/jquery.each.js"></script>
         <script type="text/javascript" src="assets/jquery-ui-dist/jquery-ui.min.js"></script>
+        <script type="text/javascript" src="assets/lodash-core/distrib/lodash-core.min.js"></script>
         <script type="text/javascript" src="assets/qtip2/dist/jquery.qtip.min.js"></script>
         <script type="text/javascript" src="assets/slickgrid/lib/jquery.event.drag-2.3.0.js"></script>
         <script type="text/javascript" src="assets/slickgrid/plugins/slick.cellrangeselector.js"></script>

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/WEB-INF/pages/summary.jsp

@@ -49,6 +49,7 @@
         <script type="text/javascript" src="js/jquery/modal/jquery.modal.js?${project.version}"></script>
         <script type="text/javascript" src="js/jquery/jquery.ellipsis.js"></script>
         <script type="text/javascript" src="js/jquery/jquery.each.js"></script>
+        <script type="text/javascript" src="assets/lodash-core/distrib/lodash-core.min.js"></script>
         <script type="text/javascript" src="assets/qtip2/dist/jquery.qtip.min.js"></script>
         <script type="text/javascript" src="assets/slickgrid/lib/jquery.event.drag-2.3.0.js"></script>
         <script type="text/javascript" src="assets/slickgrid/plugins/slick.cellrangeselector.js"></script>

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/WEB-INF/pages/templates.jsp

@@ -40,6 +40,7 @@
         <script type="text/javascript" src="js/jquery/jquery.ellipsis.js"></script>
         <script type="text/javascript" src="js/jquery/jquery.each.js"></script>
         <script type="text/javascript" src="assets/jquery-ui-dist/jquery-ui.min.js"></script>
+        <script type="text/javascript" src="assets/lodash-core/distrib/lodash-core.min.js"></script>
         <script type="text/javascript" src="assets/qtip2/dist/jquery.qtip.min.js"></script>
         <script type="text/javascript" src="assets/slickgrid/lib/jquery.event.drag-2.3.0.js"></script>
         <script type="text/javascript" src="assets/slickgrid/plugins/slick.cellrangeselector.js"></script>

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/WEB-INF/pages/users.jsp

@@ -42,6 +42,7 @@
         <script type="text/javascript" src="js/jquery/modal/jquery.modal.js?${project.version}"></script>
         <script type="text/javascript" src="js/jquery/jquery.ellipsis.js"></script>
         <script type="text/javascript" src="js/jquery/jquery.each.js"></script>
+        <script type="text/javascript" src="assets/lodash-core/distrib/lodash-core.min.js"></script>
         <script type="text/javascript" src="assets/qtip2/dist/jquery.qtip.min.js"></script>
         <script type="text/javascript" src="assets/slickgrid/lib/jquery.event.drag-2.3.0.js"></script>
         <script type="text/javascript" src="assets/slickgrid/plugins/slick.cellrangeselector.js"></script>

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/js/nf/canvas/nf-canvas.js

@@ -651,6 +651,9 @@
                 });
             });
 
+            // don't let the reload action get called more than once every second
+            var throttledCanvasReload = nfCommon.throttle(nfActions.reload, 1000);
+
             // listen for browser resize events to reset the graph size
             $(window).on('resize', function (e) {
                 if (e.target === window) {
@@ -708,7 +711,7 @@
                         nfCommon.toggleScrollable(tabsContent.get(0));
                     });
                 }
-            }).on('keyup', function (evt) {
+            }).on('keydown', function (evt) {
                 // if a dialog is open, disable canvas shortcuts
                 if ($('.dialog').is(':visible') || $('#search-field').is(':focus')) {
                     return;
@@ -726,7 +729,7 @@
                             return;
                         }
                         // ctrl-r
-                        nfActions.reload();
+                        throttledCanvasReload();
 
                         // default prevented in nf-universal-capture.js
                     } else if (evt.keyCode === 65) {

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/js/nf/nf-common.js

@@ -22,20 +22,23 @@
     if (typeof define === 'function' && define.amd) {
         define(['jquery',
                 'd3',
-                'nf.Storage'],
+                'nf.Storage',
-            function ($, d3, nfStorage) {
+                'lodash-core'],
-                return (nf.Common = factory($, d3, nfStorage));
+            function ($, d3, nfStorage, _) {
+                return (nf.Common = factory($, d3, nfStorage, _));
             });
     } else if (typeof exports === 'object' && typeof module === 'object') {
         module.exports = (nf.Common = factory(require('jquery'),
             require('d3'),
-            require('nf.Storage')));
+            require('nf.Storage'),
+            require('lodash-core')));
     } else {
         nf.Common = factory(root.$,
             root.d3,
-            root.nf.Storage);
+            root.nf.Storage,
+            root._);
     }
-}(this, function ($, d3, nfStorage) {
+}(this, function ($, d3, nfStorage, _) {
     'use strict';
 
     $(document).ready(function () {
@@ -1700,6 +1703,17 @@
                 return option.value === value;
             });
             return nfCommon.isDefinedAndNotNull(matchedOption) ? matchedOption.text : undefined;
+        },
+
+        /**
+         * Creates a throttled function that invokes at most once every wait milliseconds.
+         *
+         * @param func                The function to throttle.
+         * @param wait                The number of milliseconds to throttle invocations to.
+         * @returns {function}        The throttled version of the function.
+         */
+        throttle: function (func, wait) {
+            return _.throttle(func, wait);
         }
 
     };