/**
* @author Frane Jakelić updated by Ivan Pusic
* @brief Function that is called in a separate thread that is responsible for acquiring locks, releasing them and finding the associated block addresses
* @todo Check multithreading, check if it's working correctly
* @param commandArray array filled with commands that need to be secured using transactions
* @param lengthOfArray length of commandArray
* @param transactionId associated with the transaction
* @return ABORT or COMMIT based on the success of the function.
*/
int AK_execute_commands(command * commandArray, int lengthOfArray) {
int i = 0, status = 0;
AK_memoryAddresses addresses;
AK_PRO;
AK_memoryAddresses_link address = (AK_memoryAddresses_link) AK_malloc(sizeof(struct memoryAddresses));
for (i = 0; i < lengthOfArray; i++) {
if (!AK_get_memory_blocks(commandArray[i].tblName, &addresses)) {
printf("Error reading block Addresses. Aborting\n");
AK_EPI;
return ABORT;
};
address = &addresses;
while (address->nextElement != NULL) {
switch (commandArray[i].id_command) {
case UPDATE:
status = AK_acquire_lock(address->adresa, EXCLUSIVE_LOCK, pthread_self());
break;
case DELETE:
status = AK_acquire_lock(address->adresa, EXCLUSIVE_LOCK, pthread_self());
break;
case INSERT:
status = AK_acquire_lock(address->adresa, EXCLUSIVE_LOCK, pthread_self());
break;
case SELECT:
status = AK_acquire_lock(address->adresa, SHARED_LOCK, pthread_self());
break;
default:
break;
}
if (status == NOT_OK) {
printf("Error acquiring lock. Aborting\n");
AK_release_locks(&addresses, pthread_self());
AK_EPI;
return ABORT;
}
address = address->nextElement;
}
}
if(AK_command(commandArray, lengthOfArray) == EXIT_ERROR){
AK_EPI;
return ABORT;
}
AK_release_locks(&addresses, pthread_self());
AK_EPI;
return COMMIT;
}
/**
* @author Unknown, updated by Tomislav Ilisevic
* @brief Function for testing commands
*
*/
void AK_test_command(){
AK_PRO;
printf("***Test Command***\n");
int brojkomandi = 4;
command *komande = AK_malloc(sizeof(command)*(brojkomandi+1));
// Test za komandu INSERT
struct list_node *row_root = (struct list_node *) AK_malloc(sizeof (struct list_node));
Ak_Init_L3(&row_root);
char *tblName = "student";
int mbr, year;
float weight;
mbr = 35917;
year = 2012;
weight = 82.00;
Ak_DeleteAll_L3(&row_root);
Ak_Insert_New_Element(TYPE_INT, &mbr, tblName, "mbr", row_root);
Ak_Insert_New_Element(TYPE_VARCHAR, "Mario", tblName, "firstname", row_root);
Ak_Insert_New_Element(TYPE_VARCHAR, "Kolmacic", tblName, "lastname", row_root);
Ak_Insert_New_Element(TYPE_INT, &year, tblName, "year", row_root);
Ak_Insert_New_Element(TYPE_FLOAT, &weight, tblName, "weight", row_root);
komande[0].id_command = INSERT;
komande[0].tblName = "student";
komande[0].parameters = row_root;
// Test za komandu UPDATE
mbr = 35900;
row_root = (struct list_node *) AK_malloc(sizeof (struct list_node ));
Ak_Init_L3(&row_root);
Ak_DeleteAll_L3(&row_root);
Ak_Insert_New_Element_For_Update(TYPE_INT, &mbr, tblName, "mbr", row_root, 1);
Ak_Insert_New_Element_For_Update(TYPE_VARCHAR, "FOI", tblName, "firstname", row_root, 0);
komande[1].id_command = UPDATE;
komande[1].tblName = "student";
komande[1].parameters = row_root;
// Test za komandu DELETE
int id_prof;
id_prof = 35893;
row_root = (struct list_node *) AK_malloc(sizeof (struct list_node ));
Ak_Init_L3(&row_root);
Ak_DeleteAll_L3(&row_root);
Ak_Insert_New_Element_For_Update(TYPE_INT, &id_prof, tblName, "id_prof", row_root, 1);
Ak_Insert_New_Element_For_Update(TYPE_VARCHAR, "FOI", tblName, "firstname", row_root, 0);
komande[2].id_command = DELETE;
komande[2].tblName = "professor";
komande[2].parameters = row_root;
// Test za komandu SELECT
row_root = (struct list_node *) AK_malloc(sizeof (struct list_node ));
Ak_Init_L3(&row_root);
Ak_DeleteAll_L3(&row_root);
// printf("\nQUERY: SELECT * FROM student WHERE firstname = 'Robert';\n\n");
Ak_InsertAtEnd_L3(TYPE_ATTRIBS, "firstname", sizeof ("firstname"), row_root);
Ak_InsertAtEnd_L3(TYPE_VARCHAR, "Robert", sizeof ("Robert"), row_root);
Ak_InsertAtEnd_L3(TYPE_OPERATOR, "=", sizeof ("="), row_root);
komande[3].id_command = SELECT;
komande[3].tblName = "student";
komande[3].parameters = row_root;
// Izvrsi komande
AK_command(komande, brojkomandi);
Ak_DeleteAll_L3(&row_root);
AK_EPI;
}