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it's sometimes a bit confusing which signature to use for activate or deactivate in an OSGI component. This is because you have the choice, and this is nice :-) 

As long as you add the @Activate and @Deactivate tag before your methods, you can have zero, one or several arguments among following types (that will be automatically bound at component activation/deactivation): 

Activation: 

• ComponentContext - the Component Context for the component
• BundleContext - the Bundle Context of the component's bundle
• Map - the Component Properties from ComponentContext.getProperties.     

Deactivation:     

• int/Integer - the deactivation reason
• ComponentContext - the Component Context for the component
• BundleContext - the Bundle Context of the component's bundle
• Map - the Component Properties from ComponentContext.getProperties.

For more information on this, you can look at the dedicated Apache Felix JIRA