[FELIX-1906] Allow calling a method when service properties of an already injected service are modified

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: iPOJO-1.4.0
• Fix Version/s: iPOJO-1.6.0
• Component/s: iPOJO
• Assignee: Clement Escoffier
• Reporter: Clement Escoffier
• Created: 29/Nov/09 09:07
• Updated: 25/Apr/10 14:40
• Resolved: 29/Nov/09 10:08

Description

iPOJO provides bind and unbind callback to notify the arrival and the departure of a service. Currently, service modification was mapped as follows:

• if the service was not matching and now matches : call bind
• if the service was matching and now does no more match : call unbind
• if a service was matching and still matches : ignore

The issue modifies the third case to call a 'modify' callback.
Service dependencies will support a new 'type' : modify; such as in
<component
classname="org.apache.felix.ipojo.test.scenarios.component.CheckServiceProvider"
name="ObjectModifyCheckServiceProvider" architecture="true">
<requires field="fs">
<callback type="bind" method="objectBind" />
<callback type="unbind" method="objectUnbind" />
<callback type="modified" method="objectModify" />
</requires>
<provides />
</component>

The equivalent annotation will be also provided:
@Bind(id="mod")
public void bindMod() { }

@Unbind(id="mod")
public void unbindMod() { }

@Modified(id="mod")
public void modifyMod() { }

So, the new mapping will be:

• if the service was not matching and now matches : call bind
• if the service was matching and now does no more match : call unbind
• if a service was matching and still matches : modified method called

The callback supports regular arguments (no arg, service object, service reference, service object + map, service object + dictionary ...)