planetlab/slices/leases.js

   1 /* need to put some place else in CSS ? */
   2
   3 // space for the nodenames
   4 var x_nodelabel = 200;
   5 // right space after the nodename - removed from the above
   6 var x_sep=20;
   7 // height for the (two) rows of timelabels
   8 var y_header = 12;
   9 // space between nodes
  10 var y_sep = 10;
  11
  12 // 1-grain leases attributes
  13 // leases_w is configurable from html
  14 //var leases_w = 20;
  15 var y_node = 15;
  16 var radius= 6;
  17
  18 var anim_delay=350;
  19
  20 /* decorations / headers */
  21 /* note: looks like the 'font' attr is not effective... */
  22
  23 // vertical rules
  24 var attr_rules={'fill':"#888", 'stroke-dasharray':'- ', 'stroke-width':0.5};
  25 // set font-size separately in here rather than depend on the height
  26 var txt_timelabel = {"font": 'Times, "Trebuchet MS", Verdana, Arial, Helvetica, sans-serif',
  27                      stroke: "none", fill: "#008", 'font-size': 9};
  28 var txt_allnodes = {"font": '"Trebuchet MS", Verdana, Arial, Helvetica, sans-serif', stroke: "none", fill: "#404"};
  29 var txt_nodelabel = {"font": '"Trebuchet MS", Verdana, Arial, Helvetica, sans-serif', stroke: "none", fill: "#008"};
  30
  31 var attr_timebutton = {'fill':'#bbf', 'stroke': '#338','stroke-width':1,
  32                        'stroke-linecap':'round', 'stroke-linejoin':'miter', 'stroke-miterlimit':3};
  33 var attr_daymarker = {'stroke':'#000','stroke-width':2};
  34 var attr_half_daymarker = {'stroke':'#444','stroke-width':2};
  35
  36 /* lease dimensions and colors */
  37 /* refrain from using gradient color, seems to not be animated properly */
  38 /* lease was originally free and is still free */
  39 var attr_lease_free_free={'fill':"#def", 'stroke-width':0.5, 'stroke-dasharray':''};
  40 /* lease was originally free and is now set for our usage */
  41 var attr_lease_free_mine={'fill':"green", 'stroke-width':1, 'stroke-dasharray':'-..'};
  42 /* was mine and is still mine */
  43 var attr_lease_mine_mine={'fill':"#beb", 'stroke-width':0.5, 'stroke-dasharray':''};
  44 /* was mine and is about to be released */
  45 var attr_lease_mine_free={'fill':"white", 'stroke-width':1, 'stroke-dasharray':'-..'};
  46 var attr_lease_other={'fill':"#f88"};
  47
  48 /* other slices name */
  49 var txt_otherslice = {"font": '"Trebuchet MS", Verdana, Arial, Helvetica, sans-serif', stroke: "none", fill: "#444",
  50                       "font-size": 12 };
  51
  52 ////////////////////////////////////////////////////////////
  53 // the scheduler object
  54 function Scheduler () {
  55
  56     // xxx-hacky dunno how to retrieve this object from an ajax callback
  57     Scheduler.scheduler=this;
  58
  59     // the data contains slice names, and lease_id, we need this to find our own leases (mine)
  60     this.paper=null;
  61
  62     ////////////////////
  63     // store the result of an ajax request in the leases_data table
  64     this.set_html = function (html_data) {
  65         var table_text = $$("table#leases_data")[0].innerHTML;
  66         $$("table#leases_data")[0].innerHTML=html_data;
  67         table_text = $$("table#leases_data")[0].innerHTML;
  68         return true;
  69     }
  70
  71     ////////////////////
  72     // the names of the hidden fields that hold the input to this class
  73     // are hard-wired for now
  74     this.parse_html = function () {
  75         window.console.log('in parse_html');
  76
  77         var table = $$("table#leases_data")[0];
  78         // no reservable nodes - no data
  79         if ( ! table) {
  80             window.console.log('no table');
  81             return false;
  82         }
  83         // the nodelabels
  84         var data = [], axisx = [], axisy = [];
  85         table.getElementsBySelector("tbody>tr>th").each(function (cell) {
  86             axisy.push(getInnerText(cell));
  87         });
  88         // test for at least one entry; other wise this means we haven't retrieved
  89         // the html dta yet
  90         if (axisy.length <1) {
  91             window.console.log('no axisy');
  92             window.console.log('have retrieved html text as'+getInnerText(table));
  93             return false;
  94         }
  95
  96         // the timeslot labels
  97         table.getElementsBySelector("thead>tr>th").each(function (cell) {
  98             /* [0]: timestamp -- [1]: displayable*/
  99             axisx.push(getInnerText(cell).split("&"));
 100         });
 101
 102         // leases - expect colspan to describe length in grains
 103         // the text contents is expected to be lease_id & slicename
 104         table.getElementsBySelector("tbody>tr>td").each(function (cell) {
 105             var cell_data;
 106             var slice_attributes=getInnerText(cell).split('&');
 107             // booked leases come with lease id and slice name
 108             if (slice_attributes.length == 2) {
 109                 // leases is booked : slice_id, slice_name, duration in grains
 110                 cell_data=new Array (slice_attributes[0], slice_attributes[1], cell.colSpan);
 111             } else {
 112                 cell_data = new Array ('','',cell.colSpan);
 113             }
 114             data.push(cell_data);
 115         });
 116
 117         this.axisx=axisx;
 118         window.console.log('in parse_html, set axisx to'+axisx.length);
 119         this.axisy=axisy;
 120         this.data=data;
 121         return true;
 122     }
 123
 124     // how many time slots
 125     this.nb_grains = function () { return this.axisx.length;}
 126
 127     ////////////////////
 128     // draw
 129     this.draw_area = function (canvas_id) {
 130         window.console.log('in draw_area');
 131         this.total_width = x_nodelabel + this.nb_grains()*this.leases_w;
 132         this.total_height =   2*y_header /* the timelabels */
 133                             + 2*y_sep    /* extra space */
 134                             + y_node     /* all-nodes & timebuttons row */
 135                             + (this.axisy.length)*(y_node+y_sep);  /* the regular nodes and preceding space */
 136         // reuse for paper if exists with same size, or (re-)create otherwise
 137         var paper;
 138         if (this.paper == null) {
 139             paper = Raphael (canvas_id, this.total_width+x_sep, this.total_height);
 140         } else if (this.paper.width==this.total_width && this.paper.height==this.total_height) {
 141             paper=this.paper;
 142             paper.clear();
 143         } else {
 144             $$("#"+canvas_id)[0].innerHTML="";
 145             paper = Raphael (canvas_id, this.total_width+x_sep, this.total_height);
 146         }
 147         this.paper=paper;
 148
 149         // the path for the triangle-shaped buttons
 150         this.timebutton_path="M1,0L"+(this.leases_w-1)+",0L"+(this.leases_w/2)+","+y_header+"L1,0";
 151
 152         var axisx=this.axisx;
 153         window.console.log('in draw_area, retrieved axisx' + axisx.length);
 154
 155         var axisy=this.axisy;
 156         // maintain the list of nodelabels for the 'all nodes' button
 157         this.nodelabels=[];
 158
 159         ////////// create the time slots legend
 160         var top=0;
 161         var left=x_nodelabel;
 162
 163         var daymarker_height= 2*y_header+2*y_sep + (axisy.length+1)*(y_node+y_sep);
 164         var daymarker_path="M0,0L0," + daymarker_height;
 165
 166         var half_daymarker_off= 2*y_header+y_sep;
 167         var half_daymarker_path="M0," + half_daymarker_off + "L0," + daymarker_height;
 168
 169         var col=0;
 170         for (var i=0, len=axisx.length; i < len; ++i) {
 171             // pick the printable part
 172             var timelabel=axisx[i][1];
 173             var y = top+y_header;
 174             if (col%2 == 0) y += y_header;
 175             col +=1;
 176             // display time label
 177             var timelabel=paper.text(left,y,timelabel).attr(txt_timelabel)
 178                 .attr({"text-anchor":"middle"});
 179             // draw vertical line
 180             var path_spec="M"+left+" "+(y+y_header/2)+"L"+left+" "+this.total_height;
 181             var rule=paper.path(path_spec).attr(attr_rules);
 182             // show a day marker when relevant
 183             var timestamp=parseInt(axisx[i][0]);
 184             if ( (timestamp%(24*3600))==0) {
 185                 paper.path(daymarker_path).attr({'translation':left+','+top}).attr(attr_daymarker);
 186             } else if ( (timestamp%(12*3600))==0) {
 187                 paper.path(half_daymarker_path).attr({'translation':left+','+top}).attr(attr_daymarker);
 188             }
 189             left+=(this.leases_w);
 190         }
 191
 192         ////////// the row with the timeslot buttons (the one labeled 'All nodes')
 193         this.granularity=axisx[1][0]-axisx[0][0];
 194
 195         // move two lines down
 196         top += 2*y_header+2*y_sep;
 197         left=x_nodelabel;
 198         // all nodes buttons
 199         var allnodes = paper.text (x_nodelabel-x_sep,top+y_node/2,"All nodes").attr(txt_allnodes)
 200                 .attr ({"font-size":y_node, "text-anchor":"end","baseline":"bottom"});
 201         allnodes.scheduler=this;
 202         allnodes.click(allnodes_methods.click);
 203         // timeslot buttons
 204         for (var i=0, len=axisx.length; i < len; ++i) {
 205             var timebutton=paper.path(this.timebutton_path).attr({'translation':left+','+top}).attr(attr_timebutton);
 206             timebutton.from_time=axisx[i][0];
 207             timebutton.scheduler=this;
 208             timebutton.click(timebutton_methods.click);
 209             left+=(this.leases_w);
 210         }
 211
 212         //////// the body of the scheduler : loop on nodes
 213         top += y_node+y_sep;
 214         var data_index=0;
 215         this.leases=[];
 216         for (var i=0, len=axisy.length; i<len; ++i) {
 217             var nodename=axisy[i];
 218             left=0;
 219             var nodelabel = paper.text(x_nodelabel-x_sep,top+y_node/2,nodename).attr(txt_nodelabel)
 220                 .attr ({"font-size":y_node, "text-anchor":"end","baseline":"bottom"});
 221             nodelabel_methods.selected(nodelabel,1);
 222             nodelabel.click(nodelabel_methods.click);
 223             this.nodelabels.push(nodelabel);
 224
 225             left += x_nodelabel;
 226             var grain=0;
 227             while (grain < this.nb_grains()) {
 228                 lease_id=this.data[data_index][0];
 229                 slicename=this.data[data_index][1];
 230                 duration=this.data[data_index][2];
 231                 var lease=paper.rect (left,top,this.leases_w*duration,y_node,radius);
 232                 lease.lease_id=lease_id;
 233                 lease.nodename=nodename;
 234                 lease.nodelabel=nodelabel;
 235                 if (slicename == "") {
 236                     lease.initial="free";
 237                     lease_methods.init_free(lease);
 238                 } else if (slicename == this.slicename) {
 239                     lease.initial="mine";
 240                     lease_methods.init_mine(lease);
 241                 } else {
 242                     lease_initial="other";
 243                     lease_methods.init_other(lease,slicename);
 244                 }
 245                 lease.from_time = axisx[grain%this.nb_grains()][0];
 246                 grain += duration;
 247                 lease.until_time = axisx[grain%this.nb_grains()][0];
 248                 // record scheduler in lease
 249                 lease.scheduler=this;
 250                 // and vice versa
 251                 this.leases.push(lease);
 252                 // move on with the loop
 253                 left += this.leases_w*duration;
 254                 data_index +=1;
 255             }
 256             top += y_node + y_sep;
 257         };
 258     }
 259
 260     this.submit = function () {
 261         document.body.style.cursor = "wait";
 262         var actions=new Array();
 263         for (var i=0, len=this.leases.length; i<len; ++i) {
 264             var lease=this.leases[i];
 265             if (lease.current != lease.initial) {
 266                 var from_time=lease.from_time;
 267                 var until_time=lease.until_time;
 268                 /* scan the leases just after this one and merge if appropriate */
 269                 /* this makes sense when adding leases only though */
 270                 if (lease.current=='mine') {
 271                     var j=i+1;
 272                     while (j<len && lease_methods.compare (lease, until_time, this.leases[j])) {
 273 //                      window.console.log('merging index='+i+' initial='+this.leases[i].initial+' current='+this.leases[i].current);
 274 //                      window.console.log('merged index='+j+' initial='+this.leases[j].initial+' current='+this.leases[j].current);
 275                         until_time=this.leases[j].until_time;
 276                         ++j; ++i;
 277                     }
 278                 }
 279                 if (lease.current!='free') { // lease to add
 280                     actions.push(new Array('add-leases',
 281                                            new Array(lease.nodename),
 282                                            this.slicename,
 283                                            from_time,
 284                                            until_time));
 285                 } else { // lease to delete
 286                     actions.push(new Array ('delete-leases',
 287                                             lease.lease_id));
 288                 }
 289             }
 290         }
 291         slice_id=this.slice_id;
 292         // Ajax.Request comes with prototype
 293         var ajax=new Ajax.Request('/planetlab/common/actions.php',
 294                                   {method:'post',
 295                                    parameters:{'action':'manage-leases',
 296                                                'actions':actions.toJSON()},
 297                                    onSuccess: function(transport) {
 298                                        var response = transport.responseText || "no response text";
 299                                        document.body.style.cursor = "default";
 300 //                                     alert("Server answered:\n\n" + response + "\n\nPress OK to refresh page");
 301                                        Scheduler.scheduler.refresh();
 302                                    },
 303                                    onFailure: function(){
 304                                        document.body.style.cursor = "default";
 305                                        alert("Could not reach server, sorry...\n\nPress OK to refresh page");
 306                                        // not too sure what to do here ...
 307                                        Scheduler.scheduler.refresh();
 308                                    },
 309                                   });
 310     }
 311
 312     this.clear = function () {
 313         for (var i=0, len=this.leases.length; i<len; ++i) {
 314             var lease=this.leases[i];
 315             if (lease.current != lease.initial) {
 316                 if (lease.initial == 'free') lease_methods.init_free(lease,lease_methods.click_mine);
 317                 else                         lease_methods.init_mine(lease,lease_methods.click_free);
 318             }
 319         }
 320     }
 321
 322     // re-read settings from the html, ajax-aquire the html text for the leases_data table
 323     // store it in the html tree, parse it, and refresh graphic
 324     this.refresh = function () {
 325         window.console.log('in refresh');
 326         this.slice_id=getInnerText($$("span#leases_slice_id")[0]).strip();
 327         this.slicename=getInnerText($$("span#leases_slicename")[0]).strip();
 328         this.leases_granularity=getInnerText($$("span#leases_granularity")[0]).strip();
 329         this.leases_offset=getInnerText($$("span#leases_offset")[0]).strip();
 330         this.leases_slots=getInnerText($$("span#leases_slots")[0]).strip();
 331         this.leases_w=parseInt(getInnerText($$("span#leases_w")[0]).strip());
 332
 333         document.body.style.cursor = "wait";
 334         var ajax=new Ajax.Request('/planetlab/slices/leases-data.php',
 335                                   {method:'post',
 336                                    parameters:{'slice_id':this.slice_id,
 337                                                'slicename':this.slicename,
 338                                                'leases_granularity':this.leases_granularity,
 339                                                'leases_offset':this.leases_offset,
 340                                                'leases_slots':this.leases_slots,
 341                                                'leases_w':this.leases_w},
 342                                    onSuccess: function (transport) {
 343                                        var response = transport.responseText || "no response text";
 344                                        window.console.log("received from ajax=[["+response+"]]");
 345                                        var scheduler=Scheduler.scheduler;
 346                                        if ( ! scheduler.set_html (response))
 347                                            alert ("Something wrong .. Could not store ajax result..");
 348                                        else if ( ! scheduler.parse_html())
 349                                            alert ("Something wrong .. Could not parse ajax result..");
 350                                        else
 351                                            scheduler.draw_area("leases_area");
 352                                        document.body.style.cursor = "default";
 353                                    },
 354                                    onFailure: function(){
 355                                        document.body.style.cursor = "default";
 356                                        alert("Could not reach server, sorry...\n\n");
 357                                    },
 358                                   });
 359
 360     }
 361
 362 } // end Scheduler
 363
 364 //////////////////////////////////////// couldn't find how to inhererit from the raphael objects...
 365
 366 //////////////////// the 'all nodes' button
 367 var allnodes_methods = {
 368     click: function (event) {
 369         var scheduler=this.scheduler;
 370         /* decide what to do */
 371         var unselected=0;
 372         for (var i=0, len=scheduler.nodelabels.length; i<len; ++i)
 373             if (! scheduler.nodelabels[i].selected) unselected++;
 374         /* if at least one is not selected : select all */
 375         var new_state = (unselected >0) ? 1 : 0;
 376         for (var i=0, len=scheduler.nodelabels.length; i<len; ++i)
 377             nodelabel_methods.selected(scheduler.nodelabels[i],new_state);
 378     }
 379 }
 380
 381 //////////////////// the buttons for managing the whole timeslot
 382 var timebutton_methods = {
 383
 384     /* clicking */
 385     click: function (event) {
 386         var scheduler = this.scheduler;
 387         var from_time = this.from_time;
 388         var until_time = from_time + scheduler.granularity;
 389         /* scan leases on selected nodes, store in two arrays */
 390         var relevant_free=[], relevant_mine=[];
 391         for (var i=0,len=scheduler.leases.length; i<len; ++i) {
 392             var scan=scheduler.leases[i];
 393             if ( ! scan.nodelabel.selected) continue;
 394             // overlap ?
 395             if (scan.from_time<=from_time && scan.until_time>=until_time) {
 396                 if (scan.current == "free")       relevant_free.push(scan);
 397                 else if (scan.current == "mine")  relevant_mine.push(scan);
 398             }
 399         }
 400 //      window.console.log("Found " + relevant_free.length + " free and " + relevant_mine.length + " mine");
 401         /* decide what to do, whether book or release */
 402         if (relevant_mine.length==0 && relevant_free.length==0) {
 403             alert ("Nothing to do in this timeslot on the selected nodes");
 404             return;
 405         }
 406         // if at least one is free, let's book
 407         if (relevant_free.length > 0) {
 408             for (var i=0, len=relevant_free.length; i<len; ++i) {
 409                 var lease=relevant_free[i];
 410                 lease_methods.init_mine(lease,lease_methods.click_free);
 411             }
 412         // otherwise we unselect
 413         } else {
 414             for (var i=0, len=relevant_mine.length; i<len; ++i) {
 415                 var lease=relevant_mine[i];
 416                 lease_methods.init_free(lease,lease_methods.click_mine);
 417             }
 418         }
 419     }
 420 }
 421
 422 //////////////////// the nodelabel buttons
 423 var nodelabel_methods = {
 424
 425     // set selected mode and render visually
 426     selected: function (nodelabel, flag) {
 427         nodelabel.selected=flag;
 428         nodelabel.attr({'font-weight': (flag ? 'bold' : 'normal')});
 429     },
 430
 431     // toggle selected
 432     click: function (event) {
 433         nodelabel_methods.selected( this, ! this.selected );
 434     }
 435 }
 436
 437
 438 //////////////////// the lease buttons
 439 var lease_methods = {
 440
 441     /* in the process of merging leases before posting to the API */
 442     compare: function (lease, until_time, next_lease) {
 443         return (next_lease['nodename'] == lease['nodename'] &&
 444                 next_lease['from_time'] == until_time &&
 445                 next_lease['initial'] == lease['initial'] &&
 446                 next_lease['current'] == lease['current']);
 447     },
 448
 449     init_free: function (lease, unclick) {
 450         lease.current="free";
 451         // set color
 452         lease.animate((lease.initial=="free") ? attr_lease_free_free : attr_lease_mine_free,anim_delay);
 453         // keep track of the current status
 454         // record action
 455         lease.click (lease_methods.click_free);
 456         if (unclick) lease.unclick(unclick);
 457     },
 458
 459     // find out all the currently free leases that overlap this one
 460     click_free: function (event) {
 461         var scheduler = this.scheduler;
 462         lease_methods.init_mine(this,lease_methods.click_free);
 463     },
 464
 465     init_mine: function (lease, unclick) {
 466         lease.current="mine";
 467         lease.animate((lease.initial=="mine") ? attr_lease_mine_mine : attr_lease_free_mine,anim_delay);
 468         lease.click (lease_methods.click_mine);
 469         if (unclick) lease.unclick(unclick);
 470     },
 471
 472     click_mine: function (event) {
 473         var scheduler = this.scheduler;
 474         // this lease was originally free but is now marked for booking
 475         // we free just this lease
 476         lease_methods.init_free(this, lease_methods.click_mine);
 477     },
 478
 479
 480     init_other: function (lease, slicename) {
 481         lease.animate (attr_lease_other,anim_delay);
 482         /* a text obj to display the name of the slice that owns that lease */
 483         var otherslicelabel = paper.text (lease.attr("x")+lease.attr("width")/2,
 484                                           // xxx
 485                                           lease.attr("y")+lease.attr("height")/2,slicename).attr(txt_otherslice);
 486         /* hide it right away */
 487         otherslicelabel.hide();
 488         /* record it */
 489         lease.label=otherslicelabel;
 490         lease.hover ( function (e) { this.label.toFront(); this.label.show(); },
 491                       function (e) { this.label.hide(); } );
 492     },
 493 }
 494
 495 function init_scheduler () {
 496     // Grab the data
 497     var scheduler = new Scheduler ();
 498     // parse the table with data, and if not empty, draw the scheduler
 499     window.console.log('in init_scheduler');
 500     scheduler.refresh();
 501
 502     // attach behaviour to buttons
 503     var refresh=$$("button#leases_refresh")[0];
 504     if (refresh) refresh.onclick = function () { scheduler.refresh();}
 505     var submit=$$("button#leases_submit")[0];
 506     submit.onclick = function () { scheduler.submit(); }
 507
 508 }
 509
 510 Event.observe(window, 'load', init_scheduler);