Forking & Retracing

During the lifetime of a program, Tuner will record every step that a ConfigurableCorePool went through in memory. With an id of PoolState, you can let the pool recover to that state.
// current state: foo
let poolStateId: string = configurableCorePool.getPoolState().id;
​
// some transactions...
// current state: bar
​
configurableCorePool.recover(poolStateId);
// current state: foo
Or just let the pool step back to last state.
// current state: foo
let poolStateId: string = configurableCorePool.getPoolState().id;
​
// one transaction...
// current state: bar
​
configurableCorePool.stepBack();
// current state: foo
Sometime we want multiple instances to try out various of possibilities from current state, it's good time using fork to do that.
let forkedConfigurableCorePool: ConfigurableCorePool =
configurableCorePool.fork();
​
// some transactions with configurableCorePool...
​
// some transactions with forkedConfigurableCorePool...
The forked pool will remain the same state as its parent and the two pools act independently.
Note: poolState.fromTransition of a pool built from a PoolConfig or recovered from a snapshot will be undefined while poolState.fromTransition of a forked pool will have a Record with ActionType.FORK and its parent as source PoolState.