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POSpring DM and Services registry
 

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  1. POSpring DM and Services registry
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    <p>I'm learning Spring DM and I have a problem with Service registry. I'm using ServiceMix 4.3.0 with embedded Felix instance. I have 2 bundles in my project. </p> <p>The first one contains interface, and mock implementation. I want to publish them to OSGi service registry:</p> <pre><code>public interface PersonAPI { public void listAll(); public List&lt;PersonEntity&gt; getAll(); public void addPerson(PersonEntity pe); public PersonEntity getPerson(int id); } </code></pre> <p>PersonEntity is a simple class with data, nothing special. </p> <p>Mock implementation is contains just a list of PeopleEntity objects, so there is nothing interesting either. </p> <p>Here is part of Spring configuration XML:</p> <pre><code>&lt;bean id="personImpl" class="com.osgi.Person.impl.mock.PersonImpl" /&gt; &lt;osgi:service id="personLogic" ref="personImpl" interface="com.osgi.Person.PersonAPI" /&gt; </code></pre> <p>And part taken from pom.xml file:</p> <pre><code>&lt;plugin&gt; &lt;groupId&gt;org.apache.felix&lt;/groupId&gt; &lt;artifactId&gt;maven-bundle-plugin&lt;/artifactId&gt; &lt;version&gt;2.3.4&lt;/version&gt; &lt;extensions&gt;true&lt;/extensions&gt; &lt;configuration&gt; &lt;instructions&gt; &lt;Bundle-Category&gt;sample&lt;/Bundle-Category&gt; &lt;Bundle-SymbolicName&gt;${artifactId}&lt;/Bundle-SymbolicName&gt; &lt;Export-package&gt;com.osgi.*&lt;/Export-package&gt; &lt;/instructions&gt; &lt;/configuration&gt; &lt;/plugin&gt; </code></pre> <p>This installs fine on ServiceMix. Now I defined another bundle, here are most important parts:</p> <pre><code>public class PersonTester { PersonAPI api; public void init() { System.out.println("PostConstruct:"); System.out.println("Have API " + api + " class " + api.getClass().getCanonicalName()); api.listAll(); //This line (or any API call, blows everything) } public PersonAPI getApi() { return api; } public void setApi(PersonAPI api) { this.api = api; } } </code></pre> <p>Spring configuration:</p> <pre><code>&lt;osgi:reference id="personLogic" interface="com.osgi.Person.PersonAPI" /&gt; &lt;bean id="personTester" init-method="init" class="com.osgi.Person.PersonTester"&gt; &lt;property name="api" ref="personLogic" /&gt; &lt;/bean&gt; </code></pre> <p>Most important parts from pom.xml:</p> <pre><code>&lt;dependencies&gt; &lt;dependency&gt; &lt;groupId&gt;com.osgi&lt;/groupId&gt; &lt;artifactId&gt;Pserson-API&lt;/artifactId&gt; &lt;version&gt;0.0.1-SNAPSHOT&lt;/version&gt; &lt;/dependency&gt; .... &lt;plugin&gt; &lt;groupId&gt;org.apache.felix&lt;/groupId&gt; &lt;artifactId&gt;maven-bundle-plugin&lt;/artifactId&gt; &lt;version&gt;2.3.4&lt;/version&gt; &lt;extensions&gt;true&lt;/extensions&gt; &lt;configuration&gt; &lt;instructions&gt; &lt;Bundle-Category&gt;sample&lt;/Bundle-Category&gt; &lt;Bundle-SymbolicName&gt;${artifactId}&lt;/Bundle-SymbolicName&gt; &lt;Import-package&gt;com.Person.entity,com.osgi.Person&lt;/Import-package&gt; &lt;/instructions&gt; &lt;/configuration&gt; &lt;/plugin&gt; </code></pre> <p>The good news is, that "behind" injected Spring proxy is my implementation class. I can see that when using api.toString(). However when I call any method defined in my proxy, I get an exception:</p> <blockquote> <p>Exception in thread "SpringOsgiExtenderThread-88" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'personTester': Invocation of init method failed; nested exception is org.springframework.aop.AopInvocationException: AOP configuration seems to be invalid: tried calling method [public abstract void com.osgi.Person.PersonAPI.listAll()] on target [PersonImpl [set=[]]]; nested exception is java.lang.IllegalArgumentException: object is not an instance of declaring class</p> </blockquote> <p>It looks like It looks like AOP is missing the target, but why? And how to fix this?</p>
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    1. USkryger
    1. USSebastian Łaskawiec
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    1. COOn the risk of stating the obvious: could it be that your `com.osgi.Person.impl.mock.PersonImpl` doesn't actually implement `PersonAPI`? If not, the AOP system and the rest of the system probably load the `PersonAPI` class from different sources.
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      1. POSpring DM and Services registry
      1. USAngelo van der Sijpt
    2. COHi Angelo, double checked, everything is fine. PersonImpl correctly implements PersonAPI. I didn't notice any classpath problem, so this is the "correct" PersonAPI.
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      1. POSpring DM and Services registry
      1. USSebastian Łaskawiec
 

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