ClassNotFoundException when using anonymous class in Pax Exam test method - osgi

Question

I'm getting a ClassNotFoundException when using an anonymous class in a Pax Exam test method.
My test class:
package com.bssys.ebpp.paxexam;
import static org.ops4j.pax.exam.CoreOptions.maven;
import static org.ops4j.pax.exam.CoreOptions.mavenBundle;
import static org.ops4j.pax.exam.karaf.options.KarafDistributionOption.*;
import org.apache.camel.Processor;
import org.apache.camel.CamelContext;
import org.apache.camel.ProducerTemplate;
import org.apache.camel.Endpoint;
import org.apache.camel.Exchange;
import org.apache.camel.component.jdbc.JdbcComponent;
import org.apache.camel.impl.DefaultCamelContext;
import org.apache.camel.impl.SimpleRegistry;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.ops4j.pax.exam.Configuration;
import org.ops4j.pax.exam.Option;
import org.ops4j.pax.exam.ProbeBuilder;
import org.ops4j.pax.exam.TestProbeBuilder;
import org.ops4j.pax.exam.junit.PaxExam;
import org.ops4j.pax.exam.karaf.options.LogLevelOption;
import org.ops4j.pax.exam.util.Filter;
import org.osgi.framework.Constants;
import javax.inject.Inject;
import javax.sql.DataSource;
import javax.sql.XADataSource;
import java.io.File;
/**
* #author zhupv
*/
#RunWith(PaxExam.class)
public class TransactionsTest {
#Inject
#Filter(timeout = 30000)
Transactions transactions;
#Inject
DataSource dataSource;
#Configuration
public Option[] config() {
return new Option[]{
karafDistributionConfiguration()
.frameworkUrl(
maven()
.groupId("org.apache.servicemix")
.artifactId("apache-servicemix")
.type("zip")
.version("6.0.0.M2")
)
.karafVersion("3.0.3")
.name("Apache ServiceMix")
.unpackDirectory(new File("target/pax"))
.useDeployFolder(false),
keepRuntimeFolder(),
debugConfiguration("5005", true),
logLevel(LogLevelOption.LogLevel.DEBUG),
features(
maven().groupId("org.apache.karaf.features").artifactId("enterprise").version("3.0.3").type("xml").classifier("features"),
"transaction"
),
features(
maven().groupId("org.apache.camel.karaf").artifactId("apache-camel").version("2.15.2").type("xml").classifier("features"),
"camel", "camel-blueprint", "camel-core", "camel-spring", "camel-jdbc"
),
mavenBundle()
.groupId("com.h2database")
.artifactId("h2")
.version("1.4.187")
.start(),
mavenBundle()
.groupId("com.bssys.ebpp")
.artifactId("sandbox-services")
.version("1.0.0")
.start()
};
}
#ProbeBuilder
public TestProbeBuilder probeConfiguration(TestProbeBuilder probe) {
System.out.println("TestProbeBuilder gets called");
probe.setHeader(Constants.DYNAMICIMPORT_PACKAGE, "*");
return probe;
}
#Test
public void test() throws Exception{
try{
SimpleRegistry sr = new SimpleRegistry();
sr.put("ds", dataSource);
CamelContext camelContext = new DefaultCamelContext(sr);
camelContext.addComponent("jdbc", new JdbcComponent());
ProducerTemplate producerTemplate = camelContext.createProducerTemplate();
producerTemplate.sendBody(
"jdbc://ds",
"create table if not exists test_table(col1 varchar(255))"
);
Endpoint endpoint = camelContext.getEndpoint("jdbc://ds");
Exchange exchange = endpoint.createExchange();
exchange.getIn().setBody("select count(*) from test_table");
Exchange out = producerTemplate.send(endpoint, exchange);
out = producerTemplate.send(
"jdbc://ds",
new Processor() {
#Override
public void process(Exchange exchange) throws Exception {
exchange.getIn().setBody(
"select count(*) from test_table"
);
}
}
);
transactions.doWork();
} catch (Exception ex){
ex.printStackTrace();
}
}
}
The stacktrace:
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[:1.7.0_25]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)[:1.7.0_25]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[:1.7.0_25]
at java.lang.reflect.Method.invoke(Method.java:606)[:1.7.0_25]
at org.ops4j.pax.exam.rbc.internal.RemoteBundleContextImpl.remoteCall(RemoteBundleContextImpl.java:80)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[:1.7.0_25]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)[:1.7.0_25]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[:1.7.0_25]
at java.lang.reflect.Method.invoke(Method.java:606)[:1.7.0_25]
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:322)[:1.7.0_25]
at sun.rmi.transport.Transport$1.run(Transport.java:177)[:1.7.0_25]
at sun.rmi.transport.Transport$1.run(Transport.java:174)[:1.7.0_25]
at java.security.AccessController.doPrivileged(Native Method)[:1.7.0_25]
at sun.rmi.transport.Transport.serviceCall(Transport.java:173)[:1.7.0_25]
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:553)[:1.7.0_25]
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:808)[:1.7.0_25]
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:667)[:1.7.0_25]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)[:1.7.0_25]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)[:1.7.0_25]
at java.lang.Thread.run(Thread.java:724)[:1.7.0_25]
Caused by: org.ops4j.pax.exam.TestContainerException: [test(com.bssys.ebpp.paxexam.TransactionsTest): com/bssys/ebpp/paxexam/TransactionsTest$1]
at org.ops4j.pax.exam.invoker.junit.internal.JUnitProbeInvoker.createTestContainerException(JUnitProbeInvoker.java:138)
at org.ops4j.pax.exam.invoker.junit.internal.JUnitProbeInvoker.invokeViaJUnit(JUnitProbeInvoker.java:127)
at org.ops4j.pax.exam.invoker.junit.internal.JUnitProbeInvoker.findAndInvoke(JUnitProbeInvoker.java:97)
at org.ops4j.pax.exam.invoker.junit.internal.JUnitProbeInvoker.call(JUnitProbeInvoker.java:73)
... 20 more
Caused by: java.lang.NoClassDefFoundError: com/bssys/ebpp/paxexam/TransactionsTest$1
at com.bssys.ebpp.paxexam.TransactionsTest.test(TransactionsTest.java:111)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[:1.7.0_25]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)[:1.7.0_25]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[:1.7.0_25]
at java.lang.reflect.Method.invoke(Method.java:606)[:1.7.0_25]
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.ops4j.pax.exam.invoker.junit.internal.ContainerTestRunner.runChild(ContainerTestRunner.java:68)
at org.ops4j.pax.exam.invoker.junit.internal.ContainerTestRunner.runChild(ContainerTestRunner.java:37)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
at org.ops4j.pax.exam.invoker.junit.internal.JUnitProbeInvoker.invokeViaJUnit(JUnitProbeInvoker.java:124)
... 22 more
Caused by: java.lang.ClassNotFoundException: com.bssys.ebpp.paxexam.TransactionsTest$1 not found by sandbox-services [159]
at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1532)
at org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:75)
at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1955)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)[:1.7.0_25]
at org.apache.felix.framework.BundleWiringImpl.getClassByDelegation(BundleWiringImpl.java:1374)
at org.apache.felix.framework.BundleWiringImpl.searchImports(BundleWiringImpl.java:1553)
at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1484)
at org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:75)
at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1955)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)[:1.7.0_25]
... 44 more
The exception gets raised when the probe executes the following code:
out = producerTemplate.send(
"jdbc://ds",
new Processor() {
#Override
public void process(Exchange exchange) throws Exception {
exchange.getIn().setBody(
"select count(*) from test_table"
);
}
}
);
Does somebody have an idea what's the reason behind this?
EDIT: I'm using Pax Exam 4.5.0

Answer 1

The root cause is the ClassNotFoundException in bundle sandbox-services, which tries to load the test class from your Exam probe bundle. This fails because by default, the probe does not export any packages. Adding an Export-Package header with the TestProbeBuilder should make this work:
#ProbeBuilder
public TestProbeBuilder probeConfiguration(TestProbeBuilder probe) {
System.out.println("TestProbeBuilder gets called");
probe.setHeader(Constants.DYNAMICIMPORT_PACKAGE, "*");
probe.setHeader(Constants.EXPORT_PACKAGE, "com.bssys.ebpp.paxexam");
return probe;
}