I fail to configure a project based on Spring Boot, extended with OSGI, and using Jackson in a bundle by using import/export package system (I would like to avoid to embed the lib). I started from this project.
Maven modules:
- a Spring Boot module, the main app, initialized with Felix, like the referenced project above
- a bundle module, where I want to use ObjectMapper on activation like this
@Activate
public void activate() {
ObjectMapper objectMapper = new ObjectMapper();
}
But on activation I got the following error:
NoClassDefFoundError: com/fasterxml/jackson/databind/ObjectMapper
Yet, I had exported this package from the main app bundle (Spring Boot) and imported it in the bundle module.
This bundle module use maven-bundle-plugin (while the main app use nothing specific):
<instructions>
<_dsannotations>*</_dsannotations>
<_metatypeannotations>*</_metatypeannotations>
<Bundle-Vendor>Foo</Bundle-Vendor>
<Bundle-Version>${project.version}</Bundle-Version>
<Export-Service>
com.foo.bar.plugin.RestTaskPlugin
</Export-Service>
<Export-Package>
com.foo.bar.plugin.rest,
com.foo.bar.plugin.rest.web,
com.foo.bar.plugin.rest.config
</Export-Package>
<Import-Package>*;resolution:=optional</Import-Package>
<Embed-Dependency>*;scope=compile|runtime; type=!pom; inline=true</Embed-Dependency>
<Embed-Transitive>false</Embed-Transitive>
</instructions>
I only embed logback-classic and logback-core in this bundle (this could be another story...). In other words, I only have these 2 dependencies declared in the module. I also tried to add databind in provided scope but it changes nothing.
I don't get it since I have exported all "com.fasterxml.jackson" packages and sub-packages. To do so, the Spring boot initialize the Felix framework with a custom configuration, with the config key org.osgi.framework.system.packages.extra containing all packages to export automatically according to
the documention.
When I log them we can see around 100 exported packages including these ones :
....
com.fasterxml.jackson.databind.deser.impl,
com.fasterxml.jackson.databind,
com.fasterxml.jackson.core.sym,
....
The module bundle using databind MANIFEST.MF :
Export-Package: com.foooooooo.baaaar.plugin.rest;uses:="com.foooooooo.d
atagen.api.plugins,com.foooooooo.baaaaar.api.plugins.properties,com.baa
aaaaar.datagen.api.plugins.web,com.foooooooo.baaaaar.plugin.rest.config
,com.foooooooo.baaaaar.plugin.rest.web,com.foooooooo.baaaaar.task,com.d
atanumia.baaaaar.task.config,com.foooooooo.baaaaar.task.environment,com
.foooooooo.baaaaar.task.template,org.springframework.http,org.springfra
mework.web.client";version="0.1.0.SNAPSHOT",com.foooooooo.baaaaar.plugi
n.rest.web;uses:="com.foooooooo.baaaaar.api.plugins,com.foooooooo.baaaa
ar.api.plugins.web";version="0.1.0.SNAPSHOT",com.foooooooo.baaaaar.plug
in.rest.config;uses:="com.foooooooo.baaaaar.task.config,com.fasterxml.j
ackson.annotation,com.fasterxml.jackson.databind.annotation,org.springf
ramework.http";version="0.1.0.SNAPSHOT"
Export-Service: com.foooooooo.baaaaar.plugin.RestTaskPlugin
Import-Package: com.foooooooo.baaaar.api.plugins;resolution:=optional,c
om.foooooooo.baaaaar.api.plugins.properties;resolution:=optional,com.da
tanumia.baaaaar.api.plugins.web;resolution:=optional,com.foooooooo.baaa
aar.task;resolution:=optional,com.foooooooo.baaaaar.task.config;resolut
ion:=optional,com.foooooooo.baaaaar.task.environment;resolution:=option
al,com.foooooooo.baaaaar.task.template;resolution:=optional,com.foooooo
al,com.foooooooo.baaaaar.task.template;resolution:=optional,com.foooooo
oo.baaaaar.tools.file;resolution:=optional,com.fasterxml.jackson.annota
tion;resolution:=optional;version="[2.13,3)",com.fasterxml.jackson.data
bind;resolution:=optional;version="[2.13,3)",com.fasterxml.jackson.data
bind.annotation;resolution:=optional;version="[2.13,3)",com.jayway.json
path;resolution:=optional;version="[2.7,3)",java.io;resolution:=optiona
l,java.lang;resolution:=optional,java.lang.annotation;resolution:=optio
nal,java.lang.invoke;resolution:=optional,java.lang.management;resoluti
on:=optional,java.lang.reflect;resolution:=optional,java.net;resolution
:=optional,java.nio.channels;resolution:=optional,java.nio.charset;reso
lution:=optional,java.nio.file;resolution:=optional,java.security;resol
ution:=optional,java.security.cert;resolution:=optional,java.text;resol
ution:=optional,java.util;resolution:=optional,java.util.concurrent;res
olution:=optional,java.util.concurrent.atomic;resolution:=optional,java
.util.concurrent.locks;resolution:=optional,java.util.function;resoluti
on:=optional,java.util.logging;resolution:=optional,java.util.regex;res
olution:=optional,java.util.stream;resolution:=optional,java.util.zip;r
esolution:=optional,javax.mail;resolution:=optional,javax.mail.internet
;resolution:=optional,javax.management;resolution:=optional,javax.namin
g;resolution:=optional,javax.net;resolution:=optional,javax.net.ssl;res
olution:=optional,javax.servlet;resolution:=optional,javax.servlet.http
;resolution:=optional,javax.xml.namespace;resolution:=optional,javax.xm
l.parsers;resolution:=optional,javax.xml.stream;resolution:=optional,ja
vax.xml.stream.events;resolution:=optional,lombok;resolution:=optional,
org.apache.commons.lang3;resolution:=optional;version="[3.12,4)",org.co
dehaus.commons.compiler;resolution:=optional,org.codehaus.janino;resolu
tion:=optional,org.springframework.http;resolution:=optional,org.spring
framework.http.converter.json;resolution:=optional,org.springframework.
util;resolution:=optional,org.springframework.web.client;resolution:=op
tional,org.springframework.web.util;resolution:=optional,org.xml.sax;re
solution:=optional,org.xml.sax.helpers;resolution:=optional,sun.reflect
;resolution:=optional
It is difficult to see but we have the expected import-package:
com.fasterxml.jackson.databind;resolution:=optional;version="[2.13,3)"
I do not have any other loaded bundle excepted the framework bundles:
- org.apache.felix.fileinstall-3.7.4.jar
- org.apache.felix.scr-2.2.0.jar
- org.osgi.service.cm-1.6.1.jar
- org.osgi.util.function-1.2.0.jar
- org.osgi.util.promise-1.2.0.jar
I spend days to understand what is happening but each new tests bring me new unresolved challenges.
I can have a working project if I change strategy and embed everything, but then in some particular situations I have a linkage problem since I use the same lib in different class loaders.
How to use import/export package system correctly ? Any idea about the problem here ?
UPDATE: the export-import seems to work with other packages. For example I can use spring-web in provided scope, it is not in the final bundle module, and I can use some methods of spring-web, exported from main app. The problem seems to be the Jackson Databind or something in related to it.
UPDATE
If I use bnd-maven-plugin I do not have the problem, I will post it unless someone give a better answer.
