import (
"fmt"
+ "sync"
)
-/*
-Implements a record of ongoing transactions and helper functions to CRUD the records.
-*/
+//-----------------------------------------------------------------------------
+//
+//-----------------------------------------------------------------------------
type Tracker struct {
- transactionTable map[TransactionKey]Transaction
+ mutex sync.Mutex
+ transactionXappTable map[TransactionXappKey]*Transaction
}
func (t *Tracker) Init() {
- t.transactionTable = make(map[TransactionKey]Transaction)
+ t.transactionXappTable = make(map[TransactionXappKey]*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) TrackTransaction(key TransactionKey, xact Transaction) error {
- if _, ok := t.transactionTable[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.transType)
- return err
- }
- t.transactionTable[key] = xact
- return nil
-}
+func (t *Tracker) TrackTransaction(endpoint RmrEndpoint, params *RMRParams, respReceived bool, forwardRespToXapp bool) (*Transaction, error) {
-/*
-Retreives the transaction table entry for the given request.
-Returns error in case the transaction cannot be found.
-*/
-func (t *Tracker) UpdateTransaction(SubID uint16, transType Action, xact Transaction) error {
- key := TransactionKey{SubID, transType}
- if _, ok := t.transactionTable[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 %v is ongoing", key.SubID, key.transType)
- return err
+ trans := &Transaction{
+ tracker: nil,
+ Subs: nil,
+ RmrEndpoint: endpoint,
+ Mtype: params.Mtype,
+ Xid: params.Xid,
+ OrigParams: params,
+ RespReceived: respReceived,
+ ForwardRespToXapp: forwardRespToXapp,
}
- t.transactionTable[key] = xact
- return nil
-}
-/*
-Retreives the transaction table entry for the given request.
-Returns error in case the transaction cannot be found.
-*/
-func (t *Tracker) RetriveTransaction(subID uint16, act Action) (Transaction, error) {
- key := TransactionKey{subID, act}
- var xact Transaction
- if xact, ok := t.transactionTable[key]; ok {
- return xact, nil
+ t.mutex.Lock()
+ defer t.mutex.Unlock()
+
+ xappkey := TransactionXappKey{endpoint, params.Xid}
+ if _, ok := t.transactionXappTable[xappkey]; ok {
+ err := fmt.Errorf("Tracker: Similar transaction with xappkey %s is ongoing, transaction %s not created ", xappkey, trans)
+ return nil, err
}
- err := fmt.Errorf("transaction record for Subscription ID %d and action %s does not exist", subID, act)
- return xact, err
+
+ trans.tracker = t
+ t.transactionXappTable[xappkey] = trans
+ return trans, nil
}
-/*
-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) completeTransaction(subID uint16, act Action) (Transaction, error) {
- key := TransactionKey{subID, act}
- var emptyTransaction Transaction
- if xact, ok := t.transactionTable[key]; ok {
- delete(t.transactionTable, key)
- return xact, nil
+func (t *Tracker) UnTrackTransaction(xappKey TransactionXappKey) (*Transaction, error) {
+ t.mutex.Lock()
+ defer t.mutex.Unlock()
+ if trans, ok2 := t.transactionXappTable[xappKey]; ok2 {
+ delete(t.transactionXappTable, xappKey)
+ return trans, nil
}
- err := fmt.Errorf("transaction record for Subscription ID %d and action %s does not exist", subID, act)
- return emptyTransaction, err
+ return nil, fmt.Errorf("Tracker: No record for xappkey %s", xappKey)
}