Package org.kaaproject.kaa.client.configuration.delta

Provides interfaces to deal with configuration deltas.

See: Description

Interface Summary

Interface	Description
ConfigurationDelta	Interface for the configuration delta object
ConfigurationDeltaFactory	Interface for the delta factory
DeltaType	Interface of delta type object

Class Summary

Class	Description
AddedItemsDeltaType	Field with this delta type adds new items (DeltaType implementation)
DefaultConfigurationDelta	Default ConfigurationDelta implementation
DefaultConfigurationDeltaFactory	Default ConfigurationDeltaFactory implementation
DefaultDeltaType	Field with this delta type uses the default value (DeltaType implementation)
DeltaHandlerId	Unique id is used to identify delta objects and subscribe for their updates.
EmptyDeltaType	Empty DeltaType implementation
RemovedItemsDeltaType	Field with this delta type removes items by their handler ids (DeltaType implementation)
ResetDeltaType	Field with this delta type resets its array container (DeltaType implementation)
ValueDeltaType	Field with this delta type set the new value (DeltaType implementation)

Package org.kaaproject.kaa.client.configuration.delta Description

Provides interfaces to deal with configuration deltas.

Assume, received root delta looks as follows:

 {
     "schemaName": "testT",
     "schemaNamespace": "org.kaa.config",
     "testField1": "abc",
     "testField2": {
          "schemaName": "testRecordT",
          "schemaNamespace": "org.kaa.config",
          "testField3": 456,
          "__uuid": {
              "schemaName": "uuidT",
              "schemaNamespace": "org.kaaproject.configuration",
              "value": [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1]
          }
     },
     "__uuid": {
     "schemaName": "uuidT",
     "schemaNamespace": "org.kaaproject.configuration",
     "value": [1,2,3,4,5,6,7,1,1,1,11,1,1,14,15,16]
     }
 }
 
 

In order to access to the received data, do following:

 ConfigurationDelta rootDelta = // obtained from a delta receiver;

 if (rootDelta.hasChanged("testField1")) {
     DeltaType dt = rootDelta.getDeltaType("testField1");
     String testField1 = (String)dt.getNewValue();
     System.out.println("testField1: " + testField1);
 }

 DeltaType subrecordDT = rootDelta.getDeltaType("testField2");

 if (subrecordDT != null) {
     ConfigurationDelta testField2 = (ConfigurationDelta)subrecordDT.getNewValue();

     if (testField2 != null) {
         Integer testField3 = (Integer)testField2.getDeltaType("testField3").getNewValue();
         System.out.println("testField3: " + testField3);
     }
 }
 
 

See Also:

ConfigurationDelta, DeltaType, DeltaManager, DeltaReceiver