Implements a record of ongoing transactions and helper functions to CRUD the records.
*/
type Tracker struct {
- transaction_table map[Transaction_key]*Transaction
+ transaction_table map[Transaction_key]Transaction
+}
+
+func (t *Tracker) Init() {
+ t.transaction_table = make(map[Transaction_key]Transaction)
}
/*
Checks if a tranascation with similar type has been ongoing. If not then creates one.
Returns error if there is similar transatcion ongoing.
*/
-func (t *Tracker) Track_transaction(key Transaction_key, xact *Transaction) error{
+func (t *Tracker) Track_transaction(key Transaction_key, xact Transaction) error{
if _, ok := t.transaction_table[key]; ok {
// TODO: Implement merge related check here. If the key is same but the value is different.
err := fmt.Errorf("Transaction tracker: Similar transaction with sub id %d and type %s is ongoing", key.SubID, key.trans_type )
Retreives the transaction table entry for the given request.
Returns error in case the transaction cannot be found.
*/
-func (t *Tracker) Retrive_transaction(subID uint16, act Action) (*Transaction, error){
+func (t *Tracker) Retrive_transaction(subID uint16, act Action) (Transaction, error){
key := Transaction_key{subID, act}
+ var xact Transaction
if xact, ok := t.transaction_table[key]; ok {
return xact, nil
}
err := fmt.Errorf("Tranaction record for Subscription ID %d and action %s does not exist", subID, act)
- return nil, err
+ return xact, err
}
/*
Deletes the transaction table entry for the given request and returns the deleted xapp's address and port for reference.
Returns error in case the transaction cannot be found.
*/
-func (t *Tracker) complete_transaction(subID uint16, act Action) (*string, *uint16, error){
+func (t *Tracker) complete_transaction(subID uint16, act Action) (string, uint16, error){
key := Transaction_key{subID, act}
+ var empty_address string
+ var empty_port uint16
if xact, ok := t.transaction_table[key]; ok {
delete(t.transaction_table, key)
- return &(xact.Xapp_instance_address), &(xact.Xapp_port), nil
+ return xact.Xapp_instance_address, xact.Xapp_port, nil
}
err := fmt.Errorf("Tranaction record for Subscription ID %d and action %s does not exist", subID, act)
- return nil, nil, err
+ return empty_address, empty_port, err
}