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Bundle Activation Synchronization [message #528156]

Mon, 19 April 2010 14:40

Jonathan Gossage

Messages: 71
Registered: March 2010
Location: Ottawa, ON, Canada

Member

I am new to Equinox and am teaching myself using the book "OSGi and Equinox". I am using the Helios (M6) RCP base (32 bit) with Sun JVM 1.6.0_20 (32 bit) running on Windows 7 Professional 64 bit.

I have encountered a problem when working in Chapter 5 "Services". The problem occurs whether I create the code manually or use the code provided by the book's Sample Manager.

Essentially this chapter asks you to create three bundles A, B, C. B and C provide services that are consumed by A and are defined as dependencies of A. B and C self-register themselves as service providers in their bundle activation method. A locates and links to the services supplied by B and C in A's bundle activation method.

When I run the application, I get the following console output:

osgi> Airbag Registration{org.equinoxosgi.toast.dev.airbag.IAirbag}={serv ice.id=31}
Launching Emergency Monitor
Unable to acquire GPS service reference!
Emergency Monitor failed to start!
Gps Service Registration{org.equinoxosgi.toast.dev.gps.IGps}={service.id =32}

What is happening here is that bundle A is being activated before bundle C has been activated and hence is not finding the service offered by bundle C. However, bundle C is finally activated, just not in time.

Since this happens with the sample code provided with the book, I am led to believe that there is a problem with Equinox in the environment I described above. Am I correct in my assessment and if so should I raise a bug report? Also if I raise a bug report would you like me to investigate the possible cause of the problem?

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