[OSGi]

[BramCoding]

Hey en bedankt voor het lezen,

Ik zit op dit moment verveeld met een probleempje wanneer ik meerdere Resources wil installeren in mijn OSGi framework. Ik gebruik Eclipse IDE met de Bndtools plugin. Deze vraag werd ook op andere media gesteld en zal daarom nu verder gaan in het engels.

I have an online OSGi repository following the RFC 112. I have successfully written a method that can parse all these Resources into a List<Resource>. The Resources are now available for me by being able to obtain then using the .get(int) method of a List.

I have written a method that can install a Resource directly into the framework, for which the code can be found below:

code:

public void installResource(Resource res) {

    RepositoryContent myRepoContext = (RepositoryContent) res;

    InputStream myInputStream = myRepoContext.getContent();

    try {
        installBundle(myInputStream);
        System.out.println("Installation of " + res.toString() + " SUCCESSFUL.");
    } catch (Exception e) {
        System.out.println("Installation of " + res.toString() + " FAILED.");
        e.printStackTrace();
    }

And this is using the installBundle(InputStream inputstream method I wrote which is the following:

code:

public void installBundle(InputStream inputStream) {
    Bundle bundle = null;
    try {
        bundle = context.installBundle(null, inputStream);
        System.out.println("Context installed bundle correctly");

    } catch (BundleException e) {
        System.out.println("Context could not install bundle correctly.");
        e.printStackTrace();
    }

}

Now what I am trying to do is to install multiple Resources into my framework. I do NOT want them to be in the RESOLVED state, just the INSTALLED state is enough.

When I'm trying to install 1 Resource, everything works fine:

code:

installResource(resource1);

This is working correctly because if I then ask for the current installed bundles/resources in the framework using the lb command in the shell, I can see the bundle being there in INSTALLED state:

code:

13|Installed  |    1|org.dyamand.test.serialization (0.13.15)|0.13.15

So far so good, the installation method for the Resource is working. Although I thought. When I'm trying to install another Resource things go wrong. I'm not getting any error message or exception. On the contrary I am seeing my self printed out messages like Installation of " + res.toString() + " SUCCESSFUL.". This should mean that the Resource got installed correctly since no errors or nothing got thrown back.

But when I check for the bundles again using lb, the second resource/bundle is not there. The first one is. This has been tried with many different Resources (some that were just in the INSTALLED state, some that were in the RESOLVED state). It never worked, only to install the first Resource.

For example, if I stop the framework and start it up again with the following code:

code:

installResource(resource1);
installResource(resource2);

The only thing that happens is the resource1 begin installed.

Maybe a second Resource can't be installed if the one before is not in the RESOLVED or ACTIVE state?
This is what I thought at first, but it was simply proven to be wrong. Instead of installing directly from a Resource obtained out of an OSGi repository, I went to Maven Central and got 3 random bundles and their direct URL. The URL's can be found in the code below as well as how the method was called to install. The installBundle method was used again:

code:

installBundle("https://search.maven.org/remotecontent?filepath=org/osgi/org.osgi/3.0.0/org.osgi-3.0.0.jar");
     installBundle("https://search.maven.org/remotecontent?filepath=org/osgi/enroute/examples/microservice/rest-app-jpa/0.0.1/rest-app-jpa-0.0.1.jar");
     installBundle("https://search.maven.org/remotecontent?filepath=org/coindirect/api/1.0.1/api-1.0.1.jar");

When starting the framework like this and then asking for the bundles using lb, all 3 of them show up in INSTALLED state. See the lb output below:

code:

13|Installed  |    1|osgi (3.0.0)|3.0.0
 14|Installed  |    1|rest-app-jpa (0.0.1)|0.0.1
 15|Installed  |    1|https://search.maven.org/remotecontent?filepath=org/coindirect/api/1.0.1/api-1.0.1.jar (0.0.0)|0.0.0

I have been searching the internet for an explanation why this happens, so my question here to you all: Does anyone have any idea why I can't install multiple Resources in the framework directly?

I don't see how installing directly from an URL is different as installing directly from a Resource since they both work (atleast the first time). Someone already remarked that I could install all my bundles from their direct URL link and yes that would work but: I don't have the direct URL links for Resources I take out of my repository. I can only access the Capability with namespace osgi.content just like my method does to get the InputStream so that the Resource can be installed.

Hopelijk is hier iemand die mij wat kan helpen want ik geraak er helemaal niet aan uit.
Thanks!

[RobIII]

BramCoding schreef op donderdag 15 augustus 2019 @ 16:58:
Deze vraag werd ook op andere media gesteld en zal daarom nu verder gaan in het engels.

Euh, nee, sorry. De voertaal is hier gewoon Nederlands (tenzij je écht geen Nederlands spreekt, dan is het een ander verhaal). Maar als je gewoon te lui bent om je topic te vertalen en gewoon copy/paste hier crosspost dan gaat 't op slot. Dan had je net zo goed kunnen volstaan met een link.

Je bent van harte welkom een nieuw topic te openen maar neem dan wel de moeite het te vertalen. En zorg dan ook meteen even voor een topictitel die de lading een beetje dekt

[ Voor 18% gewijzigd door RobIII op 15-08-2019 17:17 ]