import ballerina/io;
type Update record {
int updateIndex;
int stockMnt;
};
public function main() returns error? {
Update updates = {updateIndex: 0, stockMnt: 100};
transaction {
check doUpdate(updates);
check commit;
}
return;
}
// Called within the transaction statement.
transactional function doUpdate(Update u) returns error? {
// Calls the `foo()` non-transactional function.
foo(u);
// Calls the `bar()` transactional function.
bar(u);
return;
}
function foo(Update u) {
if transactional {
// This is a transactional context.
bar(u);
}
}
transactional function bar(Update u) {
io:println("Calling from a transactional context");
}
Transactional QualifierAt compile-time, regions of code are typed as being a transactional context.
Ballerina guarantees that, whenever that region is executed, there will be a current transaction.
A function with a |
import ballerina/io;
type Update record {
int updateIndex;
int stockMnt;
};
public function main() returns error? {
Update updates = {updateIndex: 0, stockMnt: 100};
transaction {
check doUpdate(updates);
check commit;
}
return;
}
transactional function doUpdate(Update u) returns error? {
Called within the transaction statement.
foo(u);
Calls the foo() non-transactional function.
bar(u);
return;
}
Calls the bar() transactional function.
function foo(Update u) {
if transactional {
bar(u);
This is a transactional context.
}
}
transactional function bar(Update u) {
io:println("Calling from a transactional context");
}
bal run transactional_qualifier.bal
Calling from a transactional context
Calling from a transactional context
