public boolean execute() {
boolean executed = actions.executeAll();
if (executed) {
setStatus("executed");
} else {
actions.undoAll();
}
return executed;
}
public boolean undo() {
if (!isExecuted()) {
String error = "A transaction must be executed first.";
throw new RuntimeException(error);
}
boolean undone = actions.undoAll();
if (undone) {
setStatus("undone");
} else {
actions.executeAll();
}
return undone;
}
