Method calls inside Controller

[JD Clark]

In one of my Controllers, I have multiple URLs that will ultimately
render in the same way. For example, this method scans the network on
which the server resides, caches a String representation of each
connected device and each device listening on a specific port, and
then sends that information to another method to render:

public static void networkScan(String networkTarget, String port)
{
//These two lists will never have more than 256 total entries
List<InetSocketAddress> listeningDevices;
Map<String, String> allDevices;

...Logic for discovering network devices...

//Store the results in a cache, for history preservation in the
browser
Cache.set(session.getId() + "listeningDevices", listeningDevices);
Cache.set(session.getId() + "allDevices", allDevices);
showScan(listeningDevices, allDevices);
}

public static void showScan(List<InetSocketAddress> listeningDevices,
Map<String, String> allDevices)
{
render(listeningDevices, allDevices);
}

public static void getCachedScan()
{
List<InetSocketAddress> listeningDevices =
(List<InetSocketAddress>)Cache.get(session.getId() +
"listeningDevices");
Map<String, String> allDevices = (Map<String,
String>)Cache.get(session.getId() + "allDevices");
if(listeningDevices == null)
listeningDevices = new ArrayList<InetSocketAddress>();
if(allDevices == null)
allDevices = new TreeMap<String, String>();

renderScan(listeningDevices, allDevices);
}
Doing it this way results in Play doing some weird array copying that
ends up taking infinite memory. If I were to change my call of
showScan() to simply render() and create a view with the name
networkScan.html, it all works just fine, no memory bugs.

I have several other methods that also use showScan, based on
different caching settings. I don't want lots of views that are all
essentially copies of each other, so I'm trying to go through just one
method with one corresponding view.

[Manuel Bernhardt]

calling a public static method in a controller issues a redirect. If
you don't want the called method to issue a redirect you need to
prefix it with @Util

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[JD Clark]

Thank you! I couldn't find information on this very easily when I
looked for it. Is there a way I can help with the documentation of
functionality like this so it's more widely available?

On Jan 26, 12:36 pm, Manuel Bernhardt <bernhardt.man...@gmail.com>
wrote: