| Re: [leshan-dev] LeshanClient howTo add multiple LwM2M Objects |
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Hello John, Thanks for the answer. I've just seen, there is already a similar discussion about multi instance objects.... Ingo Von: leshan-dev-bounces@xxxxxxxxxxx [mailto:leshan-dev-bounces@xxxxxxxxxxx]
Im Auftrag von J.F. Schloman Ingo, What you came upon is a current limitation of the Leshan Client that needs to be implemented: support for initial multiple object instances. The member instances map in ObjectsInitializer should probably be expanded out to a Map<Integer,
Collection<LwM2mInstanceEnabler>> that would then be used in createNodeEnabler to fill the local instances Map. There then probably needs to be a setInstancesForObject public method created and check conditions added to make sure the use would then comply
with the JSON model... Right now I believe the only support for multiple instances are those that allow for those generated via create requests from the server. -John On Mon, Jul 13, 2015 at 6:14 AM, Schaal Ingo (INST/ESY4) <Ingo.Schaal@xxxxxxxxxxxx> wrote: Hello, I have a question about how to add multiple lwm2m Objects to a Lesahan Client so that the server could read the Object from the Client. In the class ObjectsInitializer the method
createNodeEnabler(ObjectModel objectModel) which is called from the mehtod
create(int... objectId) only add a new Objectinstance if the Object ist specified as single and not aas multiple. protected ObjectEnabler createNodeEnabler(ObjectModel objectModel) { final Map<Integer, LwM2mInstanceEnabler> instances = new HashMap<Integer, LwM2mInstanceEnabler>(); if (!objectModel.multiple) { LwM2mInstanceEnabler newInstance = createInstance(objectModel); if (newInstance != null) { instances.put(0, newInstance); return new ObjectEnabler(objectModel.id, objectModel, instances, getClassFor(objectModel)); } } return new ObjectEnabler(objectModel.id, objectModel, instances, getClassFor(objectModel)); }
The Example Client adds new Object in this way: // Initialize object list
final ObjectsInitializer initializer = new ObjectsInitializer( model ); initializer.setClassForObject( 3, Device.class ); initializer.setInstanceForObject( 6, locationInstance ); final List<ObjectEnabler> enablers = initializer.createMandatory(); enablers.addAll( initializer.create( 6 ) ); // Create client final InetSocketAddress clientAddress = new InetSocketAddress( localHostName, localPort ); final InetSocketAddress serverAddress = new InetSocketAddress( serverHostName, serverPort ); final LeshanClient client = new LeshanClient( clientAddress, serverAddress, new ArrayList<LwM2mObjectEnabler>( enablers ) ); // Start the client client.start();
So I created a new Object an added it in the same way:
public static class MyObject extends BaseInstanceEnabler { public MyObject() { System.out.println( "create MyObject" ); } @Override public ValueResponse read( final int resourceid ) { System.out.println( "Read on MyObject Resource " + resourceid ); switch( resourceid ) { case 0: return new ValueResponse( ResponseCode.CONTENT, new LwM2mResource( resourceid, Value.newBooleanValue( getResource0() ) ) ); case 1: return new ValueResponse( ResponseCode.CONTENT, new LwM2mResource( resourceid, Value.newIntegerValue( getResource1() ) ) );
case 2: return new ValueResponse( ResponseCode.CONTENT, new LwM2mResource( resourceid, Value.newStringValue( getResource2() ) ) );
case 3: return new ValueResponse( ResponseCode.CONTENT, new LwM2mResource( resourceid, Value.newStringValue( getResource3() ) ) );
case 4: return new ValueResponse( ResponseCode.CONTENT, new LwM2mResource( resourceid, Value.newStringValue( getResource4() ) ) ); default: return super.read( resourceid ); } } And in the Clientexample:
initializer.setInstanceForObject( 10245, new MyObject()); enablers.addAll( initializer.create( 6
, 10245 ) ); Of course I have added the description for this Object in the oma-objects-spec.json.
In the Json the instancetype is described as multiple. A new multiple Object could not be added this way. The Instance could not be added because of
if (!objectModel.multiple) { ...
} How could i add a instances for multiple Objects? Thanks and Regards Ingo
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