Using Node.js with Caché - InterSystems Documentation

lock()
Parameters
• node — the global node to be accessed.
• callback_function — a function of the form function(error, result){} used to return results
asynchronously (see “Synchronous vs. Asynchronous cache.node Methods”).
Example
mydata.kill(
{global: "Customer", subscripts: [1]},
function(error, result) { // callback code }
);
Result:
Operation successful if no error reported.
4.9 lock()
The lock() method locks global nodes for exclusive use by your program. The method can lock either an entire Global (for
example, ^Customer) or sub-sections of a Global (for example, ^Customer(1)).
To prevent deadlock situations, all global nodes that your code has locked should be unlocked before your program terminates
(see unlock()).
Synchronous
Asynchronous
Parameters
var result = mydata.lock(node);
mydata.lock(node, callback_function);
• node — the global node to be accessed.
• callback_function — a function of the form function(error, result){} used to return results
asynchronously (see “Synchronous vs. Asynchronous cache.node Methods”).
Example
mydata.lock(
{global: "Customer", subscripts: [1]},
function(error, result) { // callback code }
);
Result:
Operation successful if no error reported.
4.10 merge()
The merge method copies all or part of a global to another global.
Using Node.js with Caché 23