Value Primitive
Value primitive is a kind of state that is used to store simple information represented with datatypes like string, boolean or numbers.
Create state
To create the state, you call the method createValue(stateName, stateValue) which is available from the object initialised from the Hamoni class. It takes the name of the state and the value to store as parameters to the method.
hamoni.createValue("message-count", 0)
.then(primitive => {
valuePrimitive = primitive;
})
.catch(error => console.log(error));
Swift SDK coming soon
Java SDK coming soon
Update state
If the state is created, you get an object that represents that state. In it you have function to update the state.
valuePrimitive.update(25)
This updates the state and notifies all clients about the changes
Swift SDK coming soon
Java SDK coming soon
Receiving state change notification
If the server completes persisting the new state, it notifies connected clients including the one that made the update. To get this update you need to tell Sync which method to call when there's an update
valuePrimitive.onUpdated( updatedState => console.log(updatedState));
It calls the method with the updated state value
Swift SDK coming soon
Java SDK coming soon
Getting state value
You can get the value of the state by calling get() on the state primitive object
let state = valuePrimitive.get();
console.log(state)
Swift SDK coming soon
Java SDK coming soon
Getting existing state primitive
If you already created a state primitive you can get it by calling get(stateName) with the name of the state as parameter. This gets the state from the server and returns an object of that primitive
hamoni
.get("message-count")
.then(primitive => {
valuePrimitive = primitive;
valuePrimitive.onUpdated( state => console.log(state))
})
.catch(error => console.log(error));
Swift SDK coming soon
Java SDK coming soon
Reconnection
If a client reconnects after losing connection, the sdk fetches the state from the server. If it has been updated, it updates the local state and calls the callback passed in onSync() method
hamoni
.get("message-count")
.then(primitive => {
primitive.onSync( state => console.log(state))
})
.catch(error => console.log(error));
Swift SDK coming soon
Java SDK coming soon