ClassCastException in OsgiMailcapCommandMap
-------------------------------------------
Key: SM-2149
URL: https://issues.apache.org/jira/browse/SM-2149
Project: ServiceMix
Issue Type: Bug
Components: servicemix-mail
Environment: $ java -version
java version "1.6.0_30"
Java(TM) SE Runtime Environment (build 1.6.0_30-b12)
Java HotSpot(TM) 64-Bit Server VM (build 20.5-b03, mixed mode)
Slackware 13.37 64 bit
Linux 2.6.38.4 x86_64
Reporter: Andrew Clemons
Priority: Minor
Attachments: 01_servicemix_activation.diff, stack_trace
I am using the service mix javax.activation and javax.mail bundles:
<dependency>
<groupId>org.apache.servicemix.bundles</groupId>
<artifactId>org.apache.servicemix.bundles.javax.mail</artifactId>
<version>1.4.1_5</version>
</dependency>
<dependency>
<groupId>org.apache.servicemix.specs</groupId>
<artifactId>org.apache.servicemix.specs.activation-api-1.1</artifactId>
<version>1.9.0</version>
</dependency>
For various reasons I am also using:
<dependency>
<groupId>org.ops4j.pax.web</groupId>
<artifactId>pax-web-jetty-bundle</artifactId>
<version>1.1.2</version>
</dependency>
That bundle includes java-mail and activation as part of the bundle itself and
also includes a mailcap file. The
org.apache.servicemix.specs.activation.Activator picks that up and adds the
mailcap entries to the OsgiMailcapCommandMap.
$ unzip -q -c pax-web-jetty-bundle-1.1.2.jar META-INF/mailcap
#
# @(#)mailcap 1.8 05/04/20
#
# Default mailcap file for the JavaMail System.
#
# JavaMail content-handlers:
#
text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain
text/html;; x-java-content-handler=com.sun.mail.handlers.text_html
text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml
multipart/*;;
x-java-content-handler=com.sun.mail.handlers.multipart_mixed;
x-java-fallback-entry=true
message/rfc822;;
x-java-content-handler=com.sun.mail.handlers.message_rfc822
#
# can't support image types because java.awt.Toolkit doesn't work on servers
#
#image/gif;; x-java-content-handler=com.sun.mail.handlers.image_gif
#image/jpeg;; x-java-content-handler=com.sun.mail.handlers.image_jpeg
When I then try to send a multipart email, the DataContentHandler comes from
the pax-web-jetty-bundle, but that instance comes from its classloader and is
not assignable to the DataContentHandler as seen by the
org.apache.servicemix.specs.activation-api-1.1 bundle. This results in a
ClassCastException on line 60 in OsgiMailcapCommandMap which propagates up the
call stack.
I'll attached a patch which fixes the problem for me and an example stack
trace.
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