System and method for optimistic caching

A method for concurrently caching instances of a data item, comprising:

• reading a first instance of a data item into a first cache for a first transaction;
• reading a second instance of the data item into a second cache for a second transaction;
• updating the data item using the first transaction;
• and
• notifying the second cache that the instance of the data item in the second cache is not current with the data item.

A method for concurrently caching instances of a data item, comprising:

• reading a first instance of the data item to a first enterprise bean for a first transaction;
• reading a second instance of the data item to a second enterprise bean for a second transaction;
• updating the data item using the first transaction;
• and
• notifying the second enterprise bean that the instance of the data item in the second enterprise bean is not current with the data item.

A system for concurrently caching instances of a data item, comprising:

• a plurality of nodes, each node capable of executing a transaction wherein the transaction is adapted to use an instance of a data item derived from a data item stored in a database;
• at least one cache associated with the plurality of nodes, each cache being capable of storing the instance of a data item;
• and
• an optimistic caching algorithm running concurrently on at least some of the plurality of nodes, the optimistic caching algorithm capable of directing each node to notify the other nodes when updating the data item in the database.

A method for concurrently caching instances of a data item, comprising:

• reading a first instance of the data item into a first cache, said first instance associated with a first transaction;
• reading a second instance of the data item into a second cache, said second instance associated with a second transaction;
• updating the data item using the first transaction;
• notifying the second cache that the instance of the data item in the second cache is not current with the data item.

A system for concurrently caching instances of a data item, comprising:

• a plurality of nodes, each node capable of executing a transaction, the transaction adapted to use an instance of a data item derived from a data item stored in a database;
• at least one cache associated with the plurality of nodes, each cache capable of storing the instance of a data item;
• and
• an optimistic caching algorithm running concurrently on at least some of the nodes, said optimistic caching algorithm capable of directing each node to notify the other nodes when one of a data item has changed, and an instance of a data item has changed.