Method and apparatus for state-reversion

An article of manufacture comprising a computing-device readable medium having encoded thereon instructions capable of directing a processor to perform the operations of:

• receiving a first transaction for the model, said model having a first memory state in a queue of memory states tracking memory state changes for the model;
• applying the first transaction to the model, resulting in a second memory state added to the queue;
• tracking changes to the model between said first and second memory states;
• receiving a state-reversion request to revert back to the first memory state;
• and
• creating, in response to said state-reversion request, a new memory state in the queue equivalent to the first memory state.

A method for memory-based state-reversion of a model, said model having a queue of memory states tracking state changes over time by application of a transaction to a current memory state, said transaction resulting in a subsequent memory state added to the queue, the method comprising:

• step for receiving a first transaction for the model, said model having a first memory state in the queue;
• step for applying the first transaction to the model, resulting in a second memory state;
• step for tracking changes to the model between said first and second memory states;
• step for receiving a state-reversion request to revert back to the first memory state;
• and
• step for creating, in response to said state-reversion request, a new memory state in the queue equivalent to the first memory state.

An article of manufacture comprising a computing-device readable medium having encoded thereon instructions capable of directing a processor to perform the operations of:

• step for receiving a first transaction for the model, said model having a first memory state;
• step for applying the first transaction to the model, resulting in a second memory state;
• step for tracking changes to the model between said first and second memory states;
• step for receiving a state-reversion request to revert back to the first memory state;
• and
• step for creating, in response to said state-reversion request, a new memory state equivalent to the first memory state.

A system for state-reversion of a model, said model having current memory states which change over time into subsequent memory states by application of transactions to current memory states, the method comprising:

• a first receiving arrangement for receiving a first transaction for the model, said model having a first memory state in a queue of memory states tracking memory state changes for the model;
• means for applying the first transaction to the model, resulting in a second memory state in the queue;
• a tracking arrangement for tracking changes to the model between said first and second memory states;
• a second receiving arrangement for receiving a state-reversion request to revert back to the first memory state;
• and
• means for creating, in response to said state-reversion request, a new memory state in the queue equivalent to the first memory state.