LS iOS LSCommand mode sample

[mibrahim.youxel]

Can anybody send me any sample code for subscribing to lightstreamer with LSCommand mode

Thank You.

[DarioCrivelli]

I confirm that we don't provide such sample.

Examples of the use of COMMAND mode on the client side are only available for other libraries;
I refer, for instance, to the Basic Portfolio Demo and the Full Portfolio Demo, in pages\demos\PortfolioDemo_Basic and pages\demos\PortfolioDemo respectively.

In libraries more similar to the iOS case, there are just code samples which show the use of the APIs in the COMMAND mode case;
see, for instance, DOCS-SDKs\sdk_client_dotnet\examples\test\TestClient.cs and look for "command".

Do you have doubts on specific aspects?

[gianluca.bertani]

Hello,

a sample subscription would be something like this:


LSExtendedTableInfo *tableInfo= [LSExtendedTableInfo extendedTableInfoWithItems:[NSArray arrayWithObjects:@"portfolio1", nil]
mode:LSModeCommand
fields:[NSArray arrayWithObjects:@"command", @"key", @"qty", nil]
dataAdapter:@"PORTFOLIO_ADAPTER"
snapshot:YES];

LSSubscribedTableKey *tableKey= [_client subscribeTableWithExtendedInfo:tableInfo delegate:self useCommandLogic:YES];


If you have specific doubts don't hesitate to ask.
Best regards,

Gianluca

[mibrahim.youxel]

Thank you @DarioCrivelli.

@gianluce.bertani I want a sample code when server push updates in didUpdateWithInfo (delegate method).

Thank You

[gianluca.bertani]

As my colleague Dario said before, we don't have a full example for command logic in Objective-C. On the didUpdateWithInfo event you should take the command, key and any other relevant data and apply them to your local copy of current data. E.g.:


// Take command and data from update
NSString *command= [updateInfo currentValueOfFieldName:@"command"];
NSString *key= [updateInfo currentValueOfFieldName:@"key"];
NSString *qty= [updateInfo currentValueOfFieldName:@"qty"];

if ([command isEqualToString:@"UPDATE"]) {
// Update qty on item <key>

} else if ([command isEqualToString:@"ADD"]) {
// Add new item <key> and set qty

} else if ([command isEqualToString:@"DELETE"]) {
// Remove item <key>
}

// Update visuals


Hope this helps.
Best regards,

Gianluca