| 1 | var dyno= require('./lib/dyn.js'),
|
| 2 | diff = require('deep-diff').diff,
|
| 3 | uuid= require('node-uuid').v4,
|
| 4 | _= require('underscore'),
|
| 5 | cclone= require('circularclone'),
|
| 6 | async= require('async');
|
| 7 |
|
| 8 | var _parser= require('./lib/parser'),
|
| 9 | _finder= require('./lib/finder'),
|
| 10 | _refiner= require('./lib/refiner'),
|
| 11 | _index= require('./lib/indexer'),
|
| 12 | _modify= require('./lib/capacity');
|
| 13 |
|
| 14 | const _nu= function (v)
|
| 15 | {
|
| 16 | return typeof v!='undefined';
|
| 17 | },
|
| 18 | _isobject= function (v)
|
| 19 | {
|
| 20 | return typeof v=='object'&&!Array.isArray(v);
|
| 21 | },
|
| 22 | _isobjectarr= function (v)
|
| 23 | {
|
| 24 | return typeof v=='object'&&Array.isArray(v)&&v.length>0&&typeof v[0]=='object';
|
| 25 | },
|
| 26 | _collect= function (consume)
|
| 27 | {
|
| 28 | return function (cons)
|
| 29 | {
|
| 30 | var c;
|
| 31 |
|
| 32 | if (cons.table)
|
| 33 | {
|
| 34 | if (!(c=consume[cons.table]))
|
| 35 | c= consume[cons.table]= { read: 0, write: 0 };
|
| 36 |
|
| 37 | c.read+= cons.read;
|
| 38 | c.write+= cons.write;
|
| 39 | }
|
| 40 | else
|
| 41 | _.keys(cons).forEach(function (table)
|
| 42 | {
|
| 43 | var c, tcons= cons[table];
|
| 44 |
|
| 45 | if (!(c=consume[table]))
|
| 46 | c= consume[table]= { read: 0, write: 0 };
|
| 47 |
|
| 48 | c.read+= tcons.read;
|
| 49 | c.write+= tcons.write;
|
| 50 | });
|
| 51 | };
|
| 52 | };
|
| 53 |
|
| 54 | var dyngo= module.exports= function (opts,cb)
|
| 55 | {
|
| 56 | var defaults= { hints: true };
|
| 57 |
|
| 58 | if (!cb)
|
| 59 | {
|
| 60 | cb= opts;
|
| 61 | opts= defaults;
|
| 62 | }
|
| 63 |
|
| 64 | opts= opts || defaults;
|
| 65 | opts= _.defaults(opts,defaults);
|
| 66 |
|
| 67 | var dyn= dyno(opts.dynamo,_.extend(opts.tx || {},{ txTable: opts.txTable })),
|
| 68 | finder= _finder(dyn),
|
| 69 | parser= _parser(dyn,opts),
|
| 70 | db= _.extend({ _dyn: dyn },opts.tx,{ txTable: opts.txTable }),
|
| 71 | _alias= function (table)
|
| 72 | {
|
| 73 | return (opts.tables || {} )[table] || table;
|
| 74 | };
|
| 75 |
|
| 76 | db.cleanup= function (obj)
|
| 77 | {
|
| 78 | var p= dyn.promise('clean');
|
| 79 |
|
| 80 | process.nextTick(function ()
|
| 81 | {
|
| 82 | p.trigger.clean(cclone(obj,function (key,value)
|
| 83 | {
|
| 84 | if (key.indexOf&&key.indexOf('_')==0&&key!='_id')
|
| 85 | return undefined;
|
| 86 | else
|
| 87 | return value;
|
| 88 | }));
|
| 89 | });
|
| 90 |
|
| 91 | return p;
|
| 92 | };
|
| 93 |
|
| 94 |
|
| 95 | var configureTable= function (table)
|
| 96 | {
|
| 97 | table.ensuredIndexes= [];
|
| 98 |
|
| 99 | table.find= function (cond,projection,identity)
|
| 100 | {
|
| 101 | var p, modifiers= {}, table= this;
|
| 102 |
|
| 103 | modifiers.$consistent= !!table.$consistent;
|
| 104 |
|
| 105 | p= dyn.promise(['results','count','end'],null,'consumed');
|
| 106 |
|
| 107 | process.nextTick(function ()
|
| 108 | {
|
| 109 | parser
|
| 110 | .parse(table,modifiers,cond,projection,identity)
|
| 111 | .parsed(function (query)
|
| 112 | {
|
| 113 | refiner= _refiner(dyn,query),
|
| 114 | cursor= finder.find(query);
|
| 115 | cursor.chain(refiner);
|
| 116 | refiner.chain(p);
|
| 117 | })
|
| 118 | .error(p.trigger.error);
|
| 119 | });
|
| 120 |
|
| 121 | p.sort= function (o)
|
| 122 | {
|
| 123 | modifiers.orderby= o;
|
| 124 | return p;
|
| 125 | };
|
| 126 |
|
| 127 | p.limit= function (n)
|
| 128 | {
|
| 129 | modifiers.limit= n;
|
| 130 | return p;
|
| 131 | };
|
| 132 |
|
| 133 | p.window= function (n)
|
| 134 | {
|
| 135 | modifiers.window= n;
|
| 136 | return p;
|
| 137 | };
|
| 138 |
|
| 139 | p.skip= function (n)
|
| 140 | {
|
| 141 | modifiers.skip= n;
|
| 142 | return p;
|
| 143 | };
|
| 144 |
|
| 145 | p.noderef= function ()
|
| 146 | {
|
| 147 | modifiers.noderef= true;
|
| 148 | return p;
|
| 149 | };
|
| 150 |
|
| 151 | var origCount= _.bind(p.count,p);
|
| 152 |
|
| 153 | p.count= function (fn)
|
| 154 | {
|
| 155 | if (fn)
|
| 156 | origCount(fn);
|
| 157 | else
|
| 158 | modifiers.count= true;
|
| 159 |
|
| 160 | return p;
|
| 161 | };
|
| 162 |
|
| 163 | return p;
|
| 164 | };
|
| 165 |
|
| 166 | table.findOne= function ()
|
| 167 | {
|
| 168 | var p, args= arguments, table= this;
|
| 169 |
|
| 170 | p= dyn.promise('result','notfound','consumed');
|
| 171 |
|
| 172 | table.find.apply(table,args).limit(1).results(function (items)
|
| 173 | {
|
| 174 | if (items.length==0)
|
| 175 | p.trigger.notfound();
|
| 176 | else
|
| 177 | p.trigger.result(items[0]);
|
| 178 | })
|
| 179 | .consumed(p.trigger.consumed)
|
| 180 | .error(p.trigger.error);
|
| 181 |
|
| 182 | return p;
|
| 183 | };
|
| 184 |
|
| 185 | table.consistent= function ()
|
| 186 | {
|
| 187 | return _.extend({ $consistent: true }, table);
|
| 188 | };
|
| 189 |
|
| 190 | table.save= function (_obj,isCreate)
|
| 191 | {
|
| 192 | var objs= _obj ? (Array.isArray(_obj) ? _obj : [_obj]) : [],
|
| 193 | consume= {},
|
| 194 | p= dyn.promise(null,'updatedsinceread','consumed'), found= false;
|
| 195 |
|
| 196 | process.nextTick(function ()
|
| 197 | {
|
| 198 |
|
| 199 | async.forEach(objs,
|
| 200 | function (obj,done)
|
| 201 | {
|
| 202 | var gops= {},
|
| 203 | ops= gops[table._dynamo.TableName]= [],
|
| 204 | _hashrange= function (obj)
|
| 205 | {
|
| 206 | obj._id= obj._id || uuid();
|
| 207 | obj._pos= obj._pos || 0;
|
| 208 | obj._rev= (obj._rev || 0)+1;
|
| 209 | obj._refs= [];
|
| 210 | },
|
| 211 | _index= function (obj)
|
| 212 | {
|
| 213 | table.indexes.forEach(function (index)
|
| 214 | {
|
| 215 | var iops= index.update(obj,'put') || {};
|
| 216 |
|
| 217 | _.keys(iops).forEach(function (table)
|
| 218 | {
|
| 219 | var tops= gops[table]= gops[table] || [];
|
| 220 | tops.push.apply(tops,_.collect(iops[table],function (op) { op.index= true; return op; }));
|
| 221 | tops.index= true;
|
| 222 | });
|
| 223 | });
|
| 224 | },
|
| 225 | _remove= function (item)
|
| 226 | {
|
| 227 | ops.push({ op: 'del', item: { _id: item._id, _pos: item._pos } });
|
| 228 |
|
| 229 | table.indexes.forEach(function (index)
|
| 230 | {
|
| 231 | var iops= index.update(item,'del') || {};
|
| 232 |
|
| 233 | _.keys(iops).forEach(function (table)
|
| 234 | {
|
| 235 | var tops= gops[table]= gops[table] || [];
|
| 236 | tops.push.apply(tops,_.collect(iops[table],function (op) { op.index= true; return op; }));
|
| 237 | });
|
| 238 | });
|
| 239 | },
|
| 240 | _save= function (obj,isCreate)
|
| 241 | {
|
| 242 | var _keys= _.keys(obj),
|
| 243 | _omit= ['_old'],
|
| 244 | diffs= diff(obj._old || {},
|
| 245 | obj,
|
| 246 | function (path,key) { return key=='_old'; });
|
| 247 |
|
| 248 | if (!diffs || diffs.length==0
|
| 249 | || (obj._old || {_rev: 0})._rev<obj._rev
|
| 250 | ) return;
|
| 251 |
|
| 252 | _hashrange(obj);
|
| 253 |
|
| 254 | _keys.forEach(function (key)
|
| 255 | {
|
| 256 | if (key.indexOf('___')==0)
|
| 257 | {
|
| 258 | if (!_isobjectarr(obj[key.substring(3)]))
|
| 259 | {
|
| 260 | _omit.push(key);
|
| 261 | return;
|
| 262 | }
|
| 263 | }
|
| 264 | else
|
| 265 | if (key.indexOf('__')==0)
|
| 266 | {
|
| 267 | if (!_isobject(obj[key.substring(2)]))
|
| 268 | {
|
| 269 | _omit.push(key);
|
| 270 | return;
|
| 271 | }
|
| 272 | }
|
| 273 |
|
| 274 | var type= typeof obj[key];
|
| 275 |
|
| 276 | if (type=='object'&&!_.contains(['_old','_refs'],key))
|
| 277 | {
|
| 278 | var desc= obj[key];
|
| 279 |
|
| 280 | if (desc==null)
|
| 281 | _omit.push(key);
|
| 282 | else
|
| 283 | if (desc instanceof Date)
|
| 284 | { /* let dyn convert */ }
|
| 285 | else
|
| 286 | if (_.keys(desc).length==0)
|
| 287 | _omit.push(key);
|
| 288 | else
|
| 289 | if (Array.isArray(desc))
|
| 290 | {
|
| 291 | if (desc.length)
|
| 292 | {
|
| 293 | if (typeof desc[0]=='object')
|
| 294 | {
|
| 295 | var _id= obj['___'+key]= obj['___'+key] || uuid();
|
| 296 |
|
| 297 | if (obj._old)
|
| 298 | {
|
| 299 | var old= obj._old[key];
|
| 300 |
|
| 301 | if (old&&old.length>desc.length)
|
| 302 | old.forEach(function (oitem,idx)
|
| 303 | {
|
| 304 | if (oitem._id==_id)
|
| 305 | {
|
| 306 | if (!_.findWhere(desc,{ _pos: oitem._pos }))
|
| 307 | _remove(oitem);
|
| 308 | }
|
| 309 | else
|
| 310 | {
|
| 311 | if (!_.findWhere(desc,{ _pos: idx }))
|
| 312 | _remove({ _id: _id, _pos: idx, _ref: oitem._id+'$:$'+oitem._pos });
|
| 313 | }
|
| 314 | });
|
| 315 | }
|
| 316 |
|
| 317 | desc.forEach(function (val, pos)
|
| 318 | {
|
| 319 | if (val._id&&val._id!=_id)
|
| 320 | {
|
| 321 | _save(val);
|
| 322 | _save({ _id: _id, _pos: pos, _ref: val._id+'$:$'+val._pos });
|
| 323 | obj._refs.push(val._id);
|
| 324 | }
|
| 325 | else
|
| 326 | {
|
| 327 | val._id= _id;
|
| 328 |
|
| 329 | if (!isNaN(val._pos)&&val._pos!=pos)
|
| 330 | {
|
| 331 | delete val['_old'];
|
| 332 | delete val['_rev'];
|
| 333 | _remove(val);
|
| 334 | }
|
| 335 |
|
| 336 | val._pos= pos;
|
| 337 | _save(val);
|
| 338 | }
|
| 339 | });
|
| 340 |
|
| 341 | _omit.push(key);
|
| 342 | }
|
| 343 | }
|
| 344 | else
|
| 345 | {
|
| 346 | var _id= obj['___'+key];
|
| 347 |
|
| 348 | if (_id&&obj._old[key].length)
|
| 349 | obj._old[key].forEach(_remove);
|
| 350 |
|
| 351 | _omit.push(key);
|
| 352 | _omit.push('___'+key);
|
| 353 | }
|
| 354 | }
|
| 355 | else
|
| 356 | {
|
| 357 | _save(desc);
|
| 358 | obj['__'+key]= desc._id+'$:$'+desc._pos;
|
| 359 | obj._refs.push(desc._id);
|
| 360 | _omit.push(key);
|
| 361 | }
|
| 362 | }
|
| 363 | else
|
| 364 | if (type=='string'&&!obj[key])
|
| 365 | _omit.push(key);
|
| 366 | else
|
| 367 | if (type=='number'&&isNaN(obj[key]))
|
| 368 | _omit.push(key);
|
| 369 | });
|
| 370 |
|
| 371 | if (!obj._refs.length)
|
| 372 | delete obj['_refs'];
|
| 373 | else
|
| 374 | obj._refs= _.uniq(obj._refs);
|
| 375 |
|
| 376 | _index(obj); // index after _ fields are set so they are indexable too
|
| 377 |
|
| 378 | ops.unshift({ op: 'put', item: obj, omit: _omit, isCreate: isCreate }); // let the aggregate op came first of "contained" objects, so that the aggrgate version protects the rest
|
| 379 | },
|
| 380 | _mput= function (gops,done)
|
| 381 | {
|
| 382 | async.forEach(_.keys(gops),
|
| 383 | function (_table,done)
|
| 384 | {
|
| 385 | var tops= gops[_table];
|
| 386 |
|
| 387 | async.forEachSeries(tops, // forEachSeries: when deleting elements from array i need deletes of old item _pos done before new item _pos put
|
| 388 | function (op,done)
|
| 389 | {
|
| 390 | var tab= dyn.table(_table),
|
| 391 | obj= op.item;
|
| 392 |
|
| 393 | if (op.index)
|
| 394 | tab.hash('_hash',obj._hash)
|
| 395 | .range('_range',obj._range);
|
| 396 | else
|
| 397 | tab.hash('_id',obj._id)
|
| 398 | .range('_pos',obj._pos);
|
| 399 |
|
| 400 | if (op.op=='put')
|
| 401 | tab.put(_.omit(obj,op.omit),
|
| 402 | function ()
|
| 403 | {
|
| 404 | obj._old= cclone(_.omit(obj,'_old'));
|
| 405 | done();
|
| 406 | },
|
| 407 | { expected: obj._old&&_nu(obj._old._rev) ? { _rev: obj._old._rev } : undefined,
|
| 408 | exists: isCreate ? false : undefined })
|
| 409 | .consumed(_collect(consume))
|
| 410 | .error(done);
|
| 411 | else
|
| 412 | if (op.op=='del')
|
| 413 | tab.delete(done)
|
| 414 | .error(done);
|
| 415 | else
|
| 416 | done(new Error('unknown update type:'+op.op));
|
| 417 | },
|
| 418 | done);
|
| 419 | },
|
| 420 | done);
|
| 421 | };
|
| 422 |
|
| 423 |
|
| 424 | _save(obj,isCreate);
|
| 425 |
|
| 426 | _.keys(gops).forEach(function (table)
|
| 427 | {
|
| 428 | if (gops[table].length==0)
|
| 429 | delete gops[table];
|
| 430 | else
|
| 431 | found= true;
|
| 432 | });
|
| 433 |
|
| 434 | if (found)
|
| 435 | _mput(gops,done);
|
| 436 | else
|
| 437 | process.nextTick(done);
|
| 438 |
|
| 439 | },
|
| 440 | function (err)
|
| 441 | {
|
| 442 | p.trigger.consumed(consume);
|
| 443 |
|
| 444 | if (err)
|
| 445 | {
|
| 446 | if (err.code=='notfound')
|
| 447 | p.trigger.updatedsinceread();
|
| 448 | else
|
| 449 | p.trigger.error(err);
|
| 450 | }
|
| 451 | else
|
| 452 | p.trigger.success();
|
| 453 | });
|
| 454 |
|
| 455 | });
|
| 456 |
|
| 457 | return p;
|
| 458 | };
|
| 459 |
|
| 460 | table.create= function (obj)
|
| 461 | {
|
| 462 | var p= dyn.promise(null,'exists','consumed');
|
| 463 |
|
| 464 | table.save(obj,true)
|
| 465 | .success(p.trigger.success)
|
| 466 | .consumed(p.trigger.consumed)
|
| 467 | .error(function (err)
|
| 468 | {
|
| 469 | if (err.code=='found')
|
| 470 | p.trigger.exists();
|
| 471 | else
|
| 472 | p.trigger.error(err);
|
| 473 | });
|
| 474 |
|
| 475 | return p;
|
| 476 | };
|
| 477 |
|
| 478 | table.enableIndex= function (fields)
|
| 479 | {
|
| 480 | var index= _index(dyn,table,fields,opts);
|
| 481 | table.indexes.push(index);
|
| 482 | table.ensuredIndexes.push(fields);
|
| 483 | };
|
| 484 |
|
| 485 | table.ensureIndex= function (fields)
|
| 486 | {
|
| 487 | var p= dyn.promise();
|
| 488 |
|
| 489 | process.nextTick(function ()
|
| 490 | {
|
| 491 | var index= _index(dyn,table,fields,opts);
|
| 492 |
|
| 493 | if (index)
|
| 494 | index.ensure(function (err)
|
| 495 | {
|
| 496 | if (err)
|
| 497 | p.trigger.error(err);
|
| 498 | else
|
| 499 | {
|
| 500 | table.indexes.push(index);
|
| 501 | table.ensuredIndexes.push(fields);
|
| 502 | p.trigger.success();
|
| 503 | }
|
| 504 | });
|
| 505 | else
|
| 506 | p.trigger.error(new Error('no known index type can index those fields'));
|
| 507 | });
|
| 508 |
|
| 509 | return p;
|
| 510 | };
|
| 511 |
|
| 512 | table.remove= function (filter)
|
| 513 | {
|
| 514 | var p= dyn.promise(null,null,'consumed'),
|
| 515 | consume= {},
|
| 516 | _consumed= function (cons)
|
| 517 | {
|
| 518 | consume.read+= cons.read;
|
| 519 | consume.write+= cons.write;
|
| 520 | },
|
| 521 | _error= function (err)
|
| 522 | {
|
| 523 | p.trigger.consumed(consume);
|
| 524 | p.trigger.error(err);
|
| 525 | },
|
| 526 | _success= function ()
|
| 527 | {
|
| 528 | p.trigger.consumed(consume);
|
| 529 | p.trigger.success();
|
| 530 | },
|
| 531 | sync= dyn.syncResults(function (err)
|
| 532 | {
|
| 533 | if (err)
|
| 534 | _error(err);
|
| 535 | else
|
| 536 | _success();
|
| 537 | }),
|
| 538 | cursor= table.find(filter,table.indexes.length ? undefined : { _id: 1, _pos: 1 }),
|
| 539 | _deleteItem= function (obj,done)
|
| 540 | {
|
| 541 | async.parallel([
|
| 542 | function (done)
|
| 543 | {
|
| 544 | async.forEach(table.indexes,
|
| 545 | function (index,done)
|
| 546 | {
|
| 547 | index.remove(obj).success(done).error(done).consumed(_collect(consume));
|
| 548 | },done);
|
| 549 | },
|
| 550 | function (done)
|
| 551 | {
|
| 552 | dyn.table(table._dynamo.TableName)
|
| 553 | .hash('_id',obj._id)
|
| 554 | .range('_pos',obj._pos)
|
| 555 | .delete(done)
|
| 556 | .consumed(_collect(consume))
|
| 557 | .error(done);
|
| 558 | }],
|
| 559 | done);
|
| 560 | };
|
| 561 |
|
| 562 | cursor.results(sync.results(function (items,done)
|
| 563 | {
|
| 564 | async.forEach(items,_deleteItem,done);
|
| 565 | }))
|
| 566 | .consumed(_consumed)
|
| 567 | .error(_error)
|
| 568 | .end(sync.end);
|
| 569 |
|
| 570 | return p;
|
| 571 | };
|
| 572 |
|
| 573 | table.update= function (query,update)
|
| 574 | {
|
| 575 | var p= dyn.promise(null,null,'consumed'),
|
| 576 | cursor= table.consistent().find(query),
|
| 577 | consume= {},
|
| 578 | _consumed= function (cons)
|
| 579 | {
|
| 580 | _.keys(cons).forEach(function (table)
|
| 581 | {
|
| 582 | var c, tcons= cons[table];
|
| 583 |
|
| 584 | if (!(c=consume[table]))
|
| 585 | c= consume[table]= { read: 0, write: 0 };
|
| 586 |
|
| 587 | c.read+= tcons.read;
|
| 588 | c.write+= tcons.write;
|
| 589 | });
|
| 590 | },
|
| 591 | _error= function (err)
|
| 592 | {
|
| 593 | p.trigger.consumed(consume);
|
| 594 | p.trigger.error(err);
|
| 595 | },
|
| 596 | _success= function ()
|
| 597 | {
|
| 598 | p.trigger.consumed(consume);
|
| 599 | p.trigger.success();
|
| 600 | },
|
| 601 | sync= dyn.syncResults(function (err)
|
| 602 | {
|
| 603 | if (err)
|
| 604 | _error(err);
|
| 605 | else
|
| 606 | _success();
|
| 607 | }),
|
| 608 | _updateItem= function (item,done)
|
| 609 | {
|
| 610 | if (update.$set)
|
| 611 | table.save(_.extend(item,update.$set))
|
| 612 | .success(done)
|
| 613 | .consumed(_consumed)
|
| 614 | .error(done);
|
| 615 | else
|
| 616 | if (update.$unset)
|
| 617 | table.save(_.omit(item,_.keys(update.$unset)))
|
| 618 | .success(done)
|
| 619 | .consumed(_consumed)
|
| 620 | .error(done);
|
| 621 | else
|
| 622 | done(new Error('unknown update type'));
|
| 623 | },
|
| 624 | _updateItems= function (items,done)
|
| 625 | {
|
| 626 | async.forEach(items,_updateItem,done);
|
| 627 | };
|
| 628 |
|
| 629 |
|
| 630 | cursor
|
| 631 | .results(sync.results(_updateItems))
|
| 632 | .consumed(_consumed)
|
| 633 | .error(_error)
|
| 634 | .end(sync.end);
|
| 635 |
|
| 636 | return p;
|
| 637 | };
|
| 638 |
|
| 639 | table.modify= function (read,write)
|
| 640 | {
|
| 641 | return _modify(dyn,table._dynamo.TableName,read,write);
|
| 642 | };
|
| 643 |
|
| 644 | table.drop= function ()
|
| 645 | {
|
| 646 | var p= dyn.promise(),
|
| 647 | _success= function ()
|
| 648 | {
|
| 649 | delete db[_alias(table._dynamo.TableName)];
|
| 650 | p.trigger.success();
|
| 651 | },
|
| 652 | _check= function ()
|
| 653 | {
|
| 654 | dyn.describeTable(table._dynamo.TableName,
|
| 655 | function (err,data)
|
| 656 | {
|
| 657 | if (err)
|
| 658 | {
|
| 659 | if (err.code=='ResourceNotFoundException')
|
| 660 | _success();
|
| 661 | else
|
| 662 | p.trigger.error(err);
|
| 663 | }
|
| 664 | else
|
| 665 | setTimeout(_check,5000);
|
| 666 | });
|
| 667 | };
|
| 668 |
|
| 669 | async.forEach(table.indexes,
|
| 670 | function (index,done)
|
| 671 | {
|
| 672 | index.drop(done);
|
| 673 | },
|
| 674 | function (err)
|
| 675 | {
|
| 676 | if (opts.hints) console.log('This may take a while...'.yellow);
|
| 677 |
|
| 678 | dyn.deleteTable(table._dynamo.TableName,function (err)
|
| 679 | {
|
| 680 | if (err)
|
| 681 | {
|
| 682 | if (err.code=='ResourceNotFoundException')
|
| 683 | _success();
|
| 684 | else
|
| 685 | p.trigger.error(err);
|
| 686 | }
|
| 687 | else
|
| 688 | setTimeout(_check,5000);
|
| 689 | });
|
| 690 | });
|
| 691 |
|
| 692 | return p;
|
| 693 | };
|
| 694 |
|
| 695 | return table;
|
| 696 | },
|
| 697 | configureTables= function (cb)
|
| 698 | {
|
| 699 | var configure= function (tables)
|
| 700 | {
|
| 701 | async.forEach(Object.keys(tables),
|
| 702 | function (table,done)
|
| 703 | {
|
| 704 | dyn.describeTable(table,function (err,data)
|
| 705 | {
|
| 706 | if (!err)
|
| 707 | {
|
| 708 | var hash= _.findWhere(data.Table.KeySchema,{ KeyType: 'HASH' }),
|
| 709 | range= _.findWhere(data.Table.KeySchema,{ KeyType: 'RANGE' });
|
| 710 |
|
| 711 | if (hash&&hash.AttributeName&&hash.AttributeName=='_id'&&range&&range.AttributeName=='_pos')
|
| 712 | db[tables[table]]= configureTable({ _dynamo: data.Table, indexes: [] });
|
| 713 | }
|
| 714 |
|
| 715 | done(err);
|
| 716 | });
|
| 717 | },
|
| 718 | function (err)
|
| 719 | {
|
| 720 | cb(err,err ? null : db);
|
| 721 | });
|
| 722 | };
|
| 723 |
|
| 724 | if (opts.tables)
|
| 725 | configure(opts.tables);
|
| 726 | else
|
| 727 | dyn.listTables(function (err,list)
|
| 728 | {
|
| 729 | if (err)
|
| 730 | cb(err);
|
| 731 | else
|
| 732 | {
|
| 733 | var tables= {};
|
| 734 | list.forEach(function (table) { tables[table]= table; });
|
| 735 | configure(tables);
|
| 736 | }
|
| 737 | });
|
| 738 | };
|
| 739 |
|
| 740 | db.createCollection= function (name)
|
| 741 | {
|
| 742 | var p= dyn.promise(),
|
| 743 | _success= function ()
|
| 744 | {
|
| 745 | dyn.describeTable(name,function (err,data)
|
| 746 | {
|
| 747 | if (!err)
|
| 748 | {
|
| 749 | db[name]= configureTable({ _dynamo: data.Table, indexes: [] });
|
| 750 | p.trigger.success();
|
| 751 | }
|
| 752 | else
|
| 753 | p.trigger.error(err);
|
| 754 |
|
| 755 | });
|
| 756 | };
|
| 757 |
|
| 758 | if (opts.hints) console.log('This may take a while...'.yellow);
|
| 759 |
|
| 760 | dyn.table(name)
|
| 761 | .hash('_id','S')
|
| 762 | .range('_pos','N')
|
| 763 | .create(function check()
|
| 764 | {
|
| 765 | dyn.table(name)
|
| 766 | .hash('_id','xx')
|
| 767 | .query(function ()
|
| 768 | {
|
| 769 | _success();
|
| 770 | })
|
| 771 | .error(function (err)
|
| 772 | {
|
| 773 | if (err.code=='ResourceNotFoundException')
|
| 774 | setTimeout(check,5000);
|
| 775 | else
|
| 776 | if (err.code=='notfound')
|
| 777 | _success();
|
| 778 | else
|
| 779 | p.trigger.error(err);
|
| 780 | });
|
| 781 | })
|
| 782 | .error(function (err)
|
| 783 | {
|
| 784 | if (err.code=='ResourceInUseException')
|
| 785 | p.trigger.error(new Error('the collection exists'));
|
| 786 | else
|
| 787 | p.trigger.error(err);
|
| 788 | });
|
| 789 |
|
| 790 | return p;
|
| 791 | };
|
| 792 |
|
| 793 | db.ensureTransactionTable= function (topts)
|
| 794 | {
|
| 795 | topts= _.defaults(topts || {},{ name: 'dyngo-transaction-table' });
|
| 796 |
|
| 797 | var p= dyn.promise(),
|
| 798 | _success= function ()
|
| 799 | {
|
| 800 | dyn.describeTable(topts.name,function (err,data)
|
| 801 | {
|
| 802 | if (!err)
|
| 803 | {
|
| 804 | db.txTable= { _dynamo: data.Table, indexes: [] };
|
| 805 |
|
| 806 | db.txTable.modify= function (read,write) { return _modify(dyn,data.Table.TableName,read,write) };
|
| 807 |
|
| 808 | db.txTable.drop= function ()
|
| 809 | {
|
| 810 | var p= dyn.promise(),
|
| 811 | _success= function ()
|
| 812 | {
|
| 813 | delete db.txTable;
|
| 814 | p.trigger.success();
|
| 815 | },
|
| 816 | _check= function ()
|
| 817 | {
|
| 818 | dyn.describeTable(data.Table.TableName,
|
| 819 | function (err,data)
|
| 820 | {
|
| 821 | if (err)
|
| 822 | {
|
| 823 | if (err.code=='ResourceNotFoundException')
|
| 824 | _success();
|
| 825 | else
|
| 826 | p.trigger.error(err);
|
| 827 | }
|
| 828 | else
|
| 829 | setTimeout(_check,5000);
|
| 830 | });
|
| 831 | };
|
| 832 |
|
| 833 | if (opts.hints) console.log('This may take a while...'.yellow);
|
| 834 |
|
| 835 | dyn.deleteTable(data.Table.TableName,function (err)
|
| 836 | {
|
| 837 | if (err)
|
| 838 | {
|
| 839 | if (err.code=='ResourceNotFoundException')
|
| 840 | _success();
|
| 841 | else
|
| 842 | p.trigger.error(err);
|
| 843 | }
|
| 844 | else
|
| 845 | setTimeout(_check,5000);
|
| 846 | });
|
| 847 |
|
| 848 | return p;
|
| 849 | };
|
| 850 |
|
| 851 | p.trigger.success();
|
| 852 | }
|
| 853 | else
|
| 854 | p.trigger.error(err);
|
| 855 | });
|
| 856 | };
|
| 857 |
|
| 858 | if (opts.hints) console.log('This may take a while...'.yellow);
|
| 859 |
|
| 860 | dyn.table(topts.name)
|
| 861 | .hash('_id','S')
|
| 862 | .range('_item','S')
|
| 863 | .create(function check()
|
| 864 | {
|
| 865 | dyn.table(topts.name)
|
| 866 | .hash('_id','xx')
|
| 867 | .query(function ()
|
| 868 | {
|
| 869 | _success();
|
| 870 | })
|
| 871 | .error(function (err)
|
| 872 | {
|
| 873 | if (err.code=='ResourceNotFoundException')
|
| 874 | setTimeout(check,5000);
|
| 875 | else
|
| 876 | if (err.code=='notfound')
|
| 877 | _success();
|
| 878 | else
|
| 879 | p.trigger.error(err);
|
| 880 | });
|
| 881 | })
|
| 882 | .error(function (err)
|
| 883 | {
|
| 884 | if (err.code=='ResourceInUseException')
|
| 885 | _success();
|
| 886 | else
|
| 887 | p.trigger.error(err);
|
| 888 | });
|
| 889 |
|
| 890 | return p;
|
| 891 | };
|
| 892 |
|
| 893 | db.transaction= function (txOpts)
|
| 894 | {
|
| 895 | var p= dyn.promise('transaction',null,'consumed'),
|
| 896 | consume= {};
|
| 897 |
|
| 898 | process.nextTick(function ()
|
| 899 | {
|
| 900 | if (!db.txTable)
|
| 901 | {
|
| 902 | p.trigger.error(new Error('no transaction table defined'));
|
| 903 | return;
|
| 904 | }
|
| 905 |
|
| 906 | var tab= dyn.table(db.txTable._dynamo.TableName),
|
| 907 | init= function (tx)
|
| 908 | {
|
| 909 | dyn.table(db.txTable._dynamo.TableName)
|
| 910 | .hash('_id',tx._id)
|
| 911 | .range('_item','_')
|
| 912 | .put(tx,function ()
|
| 913 | {
|
| 914 | var dopts= _.extend({ tx: tx, txTable: db.txTable },opts,txOpts);
|
| 915 |
|
| 916 | dyngo(dopts,
|
| 917 | function (err,tx)
|
| 918 | {
|
| 919 | if (err)
|
| 920 | {
|
| 921 | p.trigger.error(err);
|
| 922 | return;
|
| 923 | }
|
| 924 |
|
| 925 | _.filter(_.keys(tx),function (key) { return !!tx[key].find; })
|
| 926 | .forEach(function (tableName)
|
| 927 | {
|
| 928 | db[tableName].ensuredIndexes.forEach(tx[tableName].enableIndex); // use enableIndex (sync) do not ensure..
|
| 929 | });
|
| 930 |
|
| 931 | dopts.tx.transaction= _.bind(db.transaction,db);
|
| 932 |
|
| 933 | tx.commit= function ()
|
| 934 | {
|
| 935 | var p= dyn.promise('committed','rolledback','consumed'),
|
| 936 | consume= {},
|
| 937 | _commit= function (cb)
|
| 938 | {
|
| 939 | dyn.table(db.txTable._dynamo.TableName)
|
| 940 | .hash('_id',tx._id)
|
| 941 | .range('_item','_')
|
| 942 | .updateItem({ update: { state: { action: 'PUT', value: 'committed' } },
|
| 943 | expected: { state: 'pending' } },
|
| 944 | function ()
|
| 945 | {
|
| 946 | tx.state= 'committed';
|
| 947 | cb();
|
| 948 | })
|
| 949 | .consumed(_collect(consume))
|
| 950 | .error(function (err)
|
| 951 | {
|
| 952 | if (err.code=='notfound')
|
| 953 | p.trigger.rolledback(true);
|
| 954 | else
|
| 955 | p.trigger.error(err);
|
| 956 | });
|
| 957 | },
|
| 958 | _complete= function (cb)
|
| 959 | {
|
| 960 | var sync= dyn.syncResults(function (err)
|
| 961 | {
|
| 962 | if (err)
|
| 963 | p.trigger.error(err);
|
| 964 | else
|
| 965 | cb();
|
| 966 | });
|
| 967 |
|
| 968 | dyn.table(db.txTable._dynamo.TableName)
|
| 969 | .hash('_id',tx._id)
|
| 970 | .range('_item','target::','BEGINS_WITH')
|
| 971 | .query(sync.results(function (items,done)
|
| 972 | {
|
| 973 | async.forEach(items,
|
| 974 | function (item,done)
|
| 975 | {
|
| 976 | var _item= item._item.split('::'),
|
| 977 | table= _item[1],
|
| 978 | hash= { attr: _item[2], value: _item[3] },
|
| 979 | range= { attr: _item[4], value: _item[4]=='_pos' ? +_item[5] : _item[5] };
|
| 980 |
|
| 981 | if (item._txOp=='delete')
|
| 982 | {
|
| 983 | dyn.table(table)
|
| 984 | .hash(hash.attr,hash.value)
|
| 985 | .range(range.attr,range.value)
|
| 986 | .delete(function () { done(); },{ expected: { _tx: tx._id } })
|
| 987 | .consumed(_collect(consume))
|
| 988 | .error(done);
|
| 989 | }
|
| 990 | else
|
| 991 | dyn.table(table)
|
| 992 | .hash(hash.attr,hash.value)
|
| 993 | .range(range.attr,range.value)
|
| 994 | .updateItem({ update: { _txTransient: { action: 'DELETE' },
|
| 995 | _txApplied: { action: 'DELETE' },
|
| 996 | _txDeleted: { action: 'DELETE' },
|
| 997 | _txLocked: { action: 'DELETE' },
|
| 998 | _tx: { action: 'DELETE' } } },
|
| 999 | function () { done(); })
|
| 1000 | .consumed(_collect(consume))
|
| 1001 | .error(done);
|
| 1002 |
|
| 1003 | },
|
| 1004 | done);
|
| 1005 | }),
|
| 1006 | { attrs: ['_id','_item','_txOp'],
|
| 1007 | consistent: true })
|
| 1008 | .error(p.trigger.error)
|
| 1009 | .consumed(_collect(consume))
|
| 1010 | .end(sync.end);
|
| 1011 | },
|
| 1012 | _clean= function (cb)
|
| 1013 | {
|
| 1014 | dyn.table(db.txTable._dynamo.TableName)
|
| 1015 | .hash('_id',tx._id)
|
| 1016 | .range('_item','_')
|
| 1017 | .updateItem({ update: { state: { action: 'PUT', value: 'completed' } },
|
| 1018 | expected: { state: 'committed' } },
|
| 1019 | function ()
|
| 1020 | {
|
| 1021 | tx.state= 'completed';
|
| 1022 | cb();
|
| 1023 | })
|
| 1024 | .consumed(p.trigger.consumed)
|
| 1025 | .error(p.trigger.error);
|
| 1026 | },
|
| 1027 | _committed= function ()
|
| 1028 | {
|
| 1029 | p.trigger.consumed(consume);
|
| 1030 | p.trigger.committed();
|
| 1031 | };
|
| 1032 |
|
| 1033 | if (tx.state=='pending')
|
| 1034 | _commit(function ()
|
| 1035 | {
|
| 1036 | _complete(function ()
|
| 1037 | {
|
| 1038 | _clean(_committed);
|
| 1039 | });
|
| 1040 | });
|
| 1041 | else
|
| 1042 | if (tx.state=='committed')
|
| 1043 | _complete(function ()
|
| 1044 | {
|
| 1045 | _clean(_committed);
|
| 1046 | });
|
| 1047 | else
|
| 1048 | p.trigger.error(new Error("Invalid transaction state: "+tx.state));
|
| 1049 |
|
| 1050 | return p;
|
| 1051 | };
|
| 1052 |
|
| 1053 | tx.rollback= function ()
|
| 1054 | {
|
| 1055 | var p= dyn.promise('rolledback',null,'consumed'),
|
| 1056 | consume= {},
|
| 1057 | _rollback= function (cb)
|
| 1058 | {
|
| 1059 | var sync= dyn.syncResults(function (err)
|
| 1060 | {
|
| 1061 | if (err)
|
| 1062 | p.trigger.error(err);
|
| 1063 | else
|
| 1064 | dyn.table(db.txTable._dynamo.TableName)
|
| 1065 | .hash('_id',tx._id)
|
| 1066 | .range('_item','_')
|
| 1067 | .updateItem({ update: { state: { action: 'PUT', value: 'rolledback' } },
|
| 1068 | expected: { state: 'pending' } },
|
| 1069 | function ()
|
| 1070 | {
|
| 1071 | tx.state= 'rolledback';
|
| 1072 | cb();
|
| 1073 | })
|
| 1074 | .consumed(_collect(consume))
|
| 1075 | .error(p.trigger.error);
|
| 1076 | });
|
| 1077 |
|
| 1078 | dyn.table(db.txTable._dynamo.TableName)
|
| 1079 | .hash('_id',tx._id)
|
| 1080 | .range('_item','target::','BEGINS_WITH')
|
| 1081 | .query(sync.results(function (items,done)
|
| 1082 | {
|
| 1083 | async.forEach(items,
|
| 1084 | function (item,done)
|
| 1085 | {
|
| 1086 | var _item= item._item.split('::'),
|
| 1087 | table= _item[1],
|
| 1088 | hash= { attr: _item[2], value: _item[3] },
|
| 1089 | range= { attr: _item[4], value: _item[4]=='_pos' ? +_item[5] : _item[5] },
|
| 1090 | clean= function ()
|
| 1091 | {
|
| 1092 | dyn.table(table)
|
| 1093 | .hash(hash.attr,hash.value)
|
| 1094 | .range(range.attr,range.value)
|
| 1095 | .updateItem({ update: { _txTransient: { action: 'DELETE' },
|
| 1096 | _txApplied: { action: 'DELETE' },
|
| 1097 | _txDeleted: { action: 'DELETE' },
|
| 1098 | _txLocked: { action: 'DELETE' },
|
| 1099 | _tx: { action: 'DELETE' } } },
|
| 1100 | function () { done(); })
|
| 1101 | .consumed(_collect(consume))
|
| 1102 | .error(done);
|
| 1103 | };
|
| 1104 |
|
| 1105 | if (item._txOp=='put')
|
| 1106 | dyn.table(table)
|
| 1107 | .hash(hash.attr,hash.value)
|
| 1108 | .range(range.attr,range.value)
|
| 1109 | .get(function (item)
|
| 1110 | {
|
| 1111 | if (item._txTransient)
|
| 1112 | dyn.table(table)
|
| 1113 | .hash(hash.attr,hash.value)
|
| 1114 | .range(range.attr,range.value)
|
| 1115 | .delete(function () { done(); })
|
| 1116 | .consumed(_collect(consume))
|
| 1117 | .error(done);
|
| 1118 | else
|
| 1119 | dyn.table(db.txTable._dynamo.TableName)
|
| 1120 | .hash('_id',tx._id)
|
| 1121 | .range('_item',['copy',
|
| 1122 | table,
|
| 1123 | hash.attr,
|
| 1124 | hash.value,
|
| 1125 | range.attr,
|
| 1126 | range.value].join('::'))
|
| 1127 | .get(function (copy)
|
| 1128 | {
|
| 1129 | copy= _.omit(copy,['_id',
|
| 1130 | '_item',
|
| 1131 | '_txLocked',
|
| 1132 | '_txApplied',
|
| 1133 | '_txDeleted',
|
| 1134 | '_txTransient',
|
| 1135 | '_tx']);
|
| 1136 |
|
| 1137 | copy[hash.attr]= hash.value;
|
| 1138 | copy[range.attr]= range.value;
|
| 1139 |
|
| 1140 | dyn.table(table)
|
| 1141 | .hash(hash.attr,hash.value)
|
| 1142 | .range(range.attr,range.value)
|
| 1143 | .put(copy,function () { done(); })
|
| 1144 | .consumed(p.trigger.consumed)
|
| 1145 | .error(p.trigger.error);
|
| 1146 | })
|
| 1147 | .consumed(_collect(consume))
|
| 1148 | .error(done);
|
| 1149 | })
|
| 1150 | .consumed(_collect(consume))
|
| 1151 | .error(done);
|
| 1152 | else
|
| 1153 | clean();
|
| 1154 | },
|
| 1155 | done);
|
| 1156 | }),
|
| 1157 | { attrs: ['_id','_item','_txOp'],
|
| 1158 | consistent: true })
|
| 1159 | .error(p.trigger.error)
|
| 1160 | .consumed(_collect(consume))
|
| 1161 | .end(sync.end);
|
| 1162 | };
|
| 1163 |
|
| 1164 | if (tx.state=='pending')
|
| 1165 | _rollback(p.trigger.rolledback);
|
| 1166 | else
|
| 1167 | p.trigger.error(new Error("Invalid transaction state: "+tx.state));
|
| 1168 |
|
| 1169 | return p;
|
| 1170 | };
|
| 1171 |
|
| 1172 | p.trigger.consumed(consume);
|
| 1173 | p.trigger.transaction(tx);
|
| 1174 | });
|
| 1175 | })
|
| 1176 | .consumed(_collect(consume))
|
| 1177 | .error(p.trigger.error);
|
| 1178 |
|
| 1179 | };
|
| 1180 |
|
| 1181 | if (typeof txOpts=='string')
|
| 1182 | tab.hash('_id',txOpts)
|
| 1183 | .range('_item','_')
|
| 1184 | .get(init,{ consistent: true })
|
| 1185 | .consumed(_collect(consume))
|
| 1186 | .error(p.trigger.error);
|
| 1187 | else
|
| 1188 | {
|
| 1189 | if (opts.tx)
|
| 1190 | p.trigger.error(new Error('cannot start a transaction within a transaction'));
|
| 1191 | else
|
| 1192 | init({ _id: uuid(), _item: '_', state: 'pending' });
|
| 1193 | }
|
| 1194 | });
|
| 1195 |
|
| 1196 | return p;
|
| 1197 | };
|
| 1198 |
|
| 1199 | configureTables(cb);
|
| 1200 |
|
| 1201 | };
|