Hi, I would like to deploy on OSGI platform (Karaf) two different versions (but could be more) of an OSGI service (org.acme.common.HelloWorldService - v1 & v2). For that purpose I have created 2 Blueprint XML config files, packaged the bundles and deploy them on karaf
[ 57] [Active ] [Created ] [ 80] Acme :: OSGI :: Client (1.0.0) [ 60] [Active ] [Created ] [ 80] Acme :: OSGI :: Commons :: v1 (1.0.0) Here is an example of blueprint config for Commons V1 <?xml version="1.0" encoding="UTF-8" standalone="no"?> <blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"; xmlns:cm=" http://aries.apache.org/blueprint/xmlns/blueprint-cm/v1.0.0";> <cm:property-placeholder id="property-placeholder" persistent-id="config.v1"/> <bean id="helloWorldService" class="org.acme.common.HelloWorldServiceImpl" init-method="init" destroy-method="destroy"> <property name="version" value="${version}"/> </bean> <service ref="helloWorldService" interface="org.acme.common.HelloWorldService" ranking="100"> <service-properties> <entry key="version" value="v1"/> </service-properties> </service> </blueprint> Now, a bundle, which is a client of a service will consume it. <?xml version="1.0" encoding="UTF-8" standalone="no"?> <blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0";> <bean id="helloWorldClient" class="org.acme.client.HelloWorldClient" init-method="callService"> <property name="service" ref="helloWorldService"/> </bean> <reference id="helloWorldService" interface="org.acme.common.HelloWorldService" filter="(version=v1)"/> </blueprint> That works fine. If now, I would like, that the client uses the latest version of the service v2 (and not v1) when we have 2 OSGI Services deployed on OSGI Registry, I must specifically specified that it must import the package "org.acme.common;version=2.0". But when I use a version range to let the bundle to take the latest version available, then I get this error [ 57] [Active ] [Failure ] [ 80] Acme :: OSGI :: Client (1.0.0) [ 60] [Active ] [Created ] [ 80] Acme :: OSGI :: Commons :: v1 (1.0.0) [ 61] [Active ] [Created ] [ 80] Acme :: OSGI :: Commons :: v2 (2.0.0) Caused by: java.lang.ClassCastException: org.acme.common.HelloWorldServiceImpl cannot be cast to org.acme.common.HelloWorldService at Proxy93f66d24_52d9_49b4_9d6c_8c65ce3ef1f1.callService(Unknown Source) at org.acme.client.HelloWorldClient.callService(HelloWorldClient.java:14) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[:1.6.0_45] Remark : Doing a refresh of the bundle client does not allow the bundle to load the latest package version available. karaf@root> packages:exports 60 ID Packages 60 org.acme.common; version=1.0.0 karaf@root> packages:exports 61 ID Packages 61 org.acme.common; version=2.0.0 karaf@root> packages:imports 57 Acme :: OSGI :: Commons :: v1 (60): org.acme.common; version=1.0.0 Is there a workaround to allow a bundle which is a client of an OSGI Service (= Proxy object) to use the bundle containing the latest package version deployed ? Regards, -- Charles Moulliard Apache Committer / Architect @RedHat Twitter : @cmoulliard | Blog : http://cmoulliard.blogspot.com
