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transaction.js

ASH Internal Transaction API

Internally, ASH deals with transactions using the following API:

 
define([], function(){
  var txIdCounter = 0;

transaction.create() Creates a transaction object, which has the following properties:

 
  return {
    create: function(){
      var actions = [];
      var _tx = {
        id: txIdCounter++,
        set: function(resource, property, value){
          var action = {
            type: "set",
            resource: resource,
            property: property,
            value: value
          };

If setting a value that has already been set in this transaction,

 
          for(var i = 0; i < actions.length; i++)
            if(actions[i].resource === resource)
              if(actions[i].property === property){
  • Replace the old action with the new one.
 
                actions[i] = action;
                return;
              }
  • Otherwise add the action to the list.
 
          actions.push(action);
        },
        actions: actions,
        equals: function(tx){
          return (tx.id === _tx.id)
              && (tx.clientId === _tx.clientId);
        }
      };
      return _tx;
    }
  }
});