Problems Migrating to Dev1.0

[johannwesely]

Hi we migrated our application to the milo dev1.0 branch. Now i have some problems with our milo client when i want to read a custom structure and it comes to BinaryDatatypeDictionaryReader readDataTypeDictionary(NodeId nodeId) i get the following exception :

15:13:14.288 [DEBUG] 'pool-5-thread-8' - ConnectionProcessSingleRequestFlexibleSizeEDPM: !! WriteHeaderData: IP=192.168.50.100 ID=7410 Target=2 RID=998 SID=0 LOC=12 BN=0 LOT=12 CMD=6
15:13:14.296 [WARN ] 'milo-shared-thread-pool-195' - BinaryDataTypeDictionaryReader: Failed to create DataTypeDictionary nodeId=NodeId{ns=0, id=7617}
java.util.concurrent.CompletionException: jakarta.xml.bind.JAXBException: Implementation of Jakarta XML Binding-API has not been found on module path or classpath.

• with linked exception:
  [java.lang.ClassNotFoundException: org.glassfish.jaxb.runtime.v2.ContextFactory]
  at java.base/java.util.concurrent.CompletableFuture.encodeRelay(CompletableFuture.java:368)
  at java.base/java.util.concurrent.CompletableFuture.uniComposeStage(CompletableFuture.java:1189)
  at java.base/java.util.concurrent.CompletableFuture.thenCompose(CompletableFuture.java:2309)
  at org.eclipse.milo.opcua.sdk.client.dtd.BinaryDataTypeDictionaryReader.readDataTypeDictionary(BinaryDataTypeDictionaryReader.java:177)
  at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
  at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411)
  at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762)
  at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276)
  at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179)
  at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992)
  at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
  at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
  at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
  at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
  at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682)
  at org.eclipse.milo.opcua.sdk.client.dtd.BinaryDataTypeDictionaryReader.lambda$readDataTypeDictionariesAsync$4(BinaryDataTypeDictionaryReader.java:125)
  at java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:646)
  at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510)
  at java.base/java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:2147)
  at org.eclipse.milo.opcua.stack.transport.client.AbstractUascClientTransport.lambda$handleResponse$3(AbstractUascClientTransport.java:140)
  at org.eclipse.milo.opcua.stack.core.util.ExecutionQueue$Task.run(ExecutionQueue.java:119)
  at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
  at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
  at java.base/java.lang.Thread.run(Thread.java:833)
  Caused by: jakarta.xml.bind.JAXBException: Implementation of Jakarta XML Binding-API has not been found on module path or classpath.
  at jakarta.xml.bind.ContextFinder.newInstance(ContextFinder.java:250)
  at jakarta.xml.bind.ContextFinder.newInstance(ContextFinder.java:238)
  at jakarta.xml.bind.ContextFinder.find(ContextFinder.java:386)
  at jakarta.xml.bind.JAXBContext.newInstance(JAXBContext.java:605)
  at jakarta.xml.bind.JAXBContext.newInstance(JAXBContext.java:546)
  at org.eclipse.milo.opcua.sdk.core.dtd.BsdParser.parse(BsdParser.java:32)
  at org.eclipse.milo.opcua.sdk.client.dtd.BinaryDataTypeDictionaryReader.createTypeDictionaryInfo(BinaryDataTypeDictionaryReader.java:308)
  at org.eclipse.milo.opcua.sdk.client.dtd.BinaryDataTypeDictionaryReader.lambda$readDataTypeDictionary$10(BinaryDataTypeDictionaryReader.java:177)
  at java.base/java.util.concurrent.CompletableFuture.uniComposeStage(CompletableFuture.java:1187)
  ... 22 common frames omitted
  Caused by: java.lang.ClassNotFoundException: org.glassfish.jaxb.runtime.v2.ContextFactory
  at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
  at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
  at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525)
  at jakarta.xml.bind.ServiceLoaderUtil.nullSafeLoadClass(ServiceLoaderUtil.java:113)
  at jakarta.xml.bind.ServiceLoaderUtil.safeLoadClass(ServiceLoaderUtil.java:146)
  at jakarta.xml.bind.ContextFinder.newInstance(ContextFinder.java:248)
  ... 30 common frames omitted

We use in some places still Javax instead of jakarta (Hibernate) so i wonder if i have to migrate the whole app to Jakarta to get this working. in my project i added following dependencies because i read javax and jakarta can coexist with these:

jakarta.xml.bind
jakarta.xml.bind-api
4.0.1


org.glassfish.jaxb
jaxb-runtime
2.3.1


com.sun.xml.bind
jaxb-impl
2.3.6


javax.xml.bind
jaxb-api
2.3.1

Do you have any suggestions ?

[kevinherron]

The dtd-core project now depends on the 4.0.x versions of JAXB.

You might be able to move your project away from using the BinaryDataTypeDictionaryReader entirely. The dev/1.0 branch includes support for the DataTypeDefinition attribute. Most servers support these attributes, and some these days even do not support the old datatype dictionary mechanism.

See these examples:

• https://github.com/eclipse/milo/blob/dev/1.0/milo-examples/client-examples/src/main/java/org/eclipse/milo/examples/client/UnifiedAutomationReadCustomDataTypeExample1.java
• https://github.com/eclipse/milo/blob/dev/1.0/milo-examples/client-examples/src/main/java/org/eclipse/milo/examples/client/UnifiedAutomationReadCustomDataTypeExample2.java