I have the latest jxBrowser. I´m trying to interface jxBrowser with the NetCDF-Java library. I have instanciated an NetCDF Array on Java and set it into jxBrowser. When calling a method on this class, I get the correct answer, so, everything is working fine. However, when calling a method on the superclass I get an exception (the method is toString()):
01:51:30 INFORMAÇÕES: WRITE: OnInvokeJSJavaMessage{type=OnInvokeJSJavaEvent, uid=7, javaObjectId=0, contextPtr=68553440, methodName='toString', parameters='', returnValue='', errorMessage='NoSuchMethodException: ucar.ma2.ArrayDouble$D2.toString()'}, SocketInfo{cid=0, bid=0, channelType=Render}
01:51:30 INFORMAÇÕES: READ: ExecuteJavaScriptMessage{type=ExecuteJavaScript, uid = 21, frameId=-1, javaScript=' var dbl2 = dbl.toString();
', hasReturnValue=true, returnValue=''}, SocketInfo{cid=0, bid=0, channelType=Render}
01:51:30 INFORMAÇÕES: [0620/175130:INFO:CONSOLE(1)] "Uncaught NoSuchMethodException: ucar.ma2.ArrayDouble$D2.toString()", source: (1)
toString is defined on ucar.ma2.Array (from the documentation):
public java.lang.String toString()
Overrides:
toString in class java.lang.Object
Did I do something wrong or is this a bug?
Right now JxBrowser JavaScript-Java Bridge allows binding Java classes to JavaScript objects directly. It doesn't support calls to super class methods. In one of the next versions this functionality will be extended and support of super classes will be implemented.
Related
Is it possible to pass anonymous object implementations over Corda's RPC interface? - For example:
Workflow
#CordaSerializable
interface ExampleInterface {
val number: Int
}
#StartableByRPC
class SquareFlow(private val example: ExampleInterface) : FlowLogic<Int>() {
#Suspendable
override fun call(): Int = example.number * example.number
}
RPC Client
val value = object : ExampleInterface {
override val number: Int = 5
}
return rpc.startFlowDynamic(SquareFlow::class.java, value).returnValue.getOrThrow()
Exception
net.corda.client.rpc.RPCException: java.util.List<*> -> Unable to create an object serializer for type class com.example.client.ExampleService$square$value$1: No unique deserialization constructor can be identified
Either annotate a constructor for this type with #ConstructorForDeserialization, or provide a custom serializer for it
Whilst this is an example, what I actually want to do is pass object : TypeReference<SomeType>(){} over RPC.
As per Corda's docs anonymous objects are not supported by their AMQP
serialization which is used in the RPC client which you can read here. This is likely due to a public constructor being needed for serialization and deserialization I imagine.
Additionally I assume you are referencing Jackson's TypeReference class which uses generics which are only available at compile time. Due to how Corda's serialization works the generic won't be available at runtime so when the TypeReference is passed from the rpc application to the corda node the corda node will not know what the generic is. I haven't tried this myself but I believe some exception will be thrown whenever the flow attempts to suspend or possibly before in the RPC client.
You can probably pass a jackson JavaType class to a flow without a problem as I believe it is whitelisted as serializable in Corda by default, if not look at how to whitelist the class here using the SerializationWhitelist. You can obtain the JavaType by instantiating a TypeFactory and calling constructType(new TypeReference<SomeType> {}). then just pass the JavaType to your flows constructor.
In a SpringBoot application, I have the following configuration:
axon:
axonserver:
servers: "${AXON_SERVER:localhost}"
serializer:
general: jackson
messages: jackson
events: jackson
logging.level:
org.axonframework.modelling.saga: debug
Downsizing the scenario to bare minimum, the relevant portion of Saga class:
#Slf4j
#Saga
#ProcessingGroup("AuctionEventManager")
public class AuctionEventManagerSaga {
#Autowired
private transient EventScheduler eventScheduler;
private ScheduleToken scheduleToken;
private Instant auctionTimerStart;
#StartSaga
#SagaEventHandler(associationProperty = "auctionEventId")
protected void on(final AuctionEventScheduled event) {
this.auctionTimerStart = event.getTimerStart();
// Cancel any pre-existing previous job, since the scheduling thread might be lost upon a crash/restart of JVM.
if (this.scheduleToken != null) {
this.eventScheduler.cancelSchedule(this.scheduleToken);
}
this.scheduleToken = this.eventScheduler.schedule(
this.auctionTimerStart,
AuctionEventStarted.builder()
.auctionEventId(event.getAuctionEventId())
.build()
);
}
#EndSaga
#SagaEventHandler(associationProperty = "auctionEventId")
protected void on(final AuctionEventStarted event) {
log.info(
"[AuctionEventManagerSaga] Current state: {scheduleToken={}, auctionTimerStart={}}",
this.scheduleToken,
this.auctionTimerStart
);
}
}
In the final compiled class, we will end up having 4 properties: log (from #Slf4j), eventScheduler (transient, #Autowired), scheduleToken and auctionTimerStart.
For reference information, here is a sample of the general approach I've been using for both Command and Event classes:
#Value
#Builder
#JsonDeserialize(builder = AuctionEventStarted.AuctionEventStartedBuilder.class)
public class AuctionEventStarted {
AuctionEventId auctionEventId;
#JsonPOJOBuilder(withPrefix = "")
public static final class AuctionEventStartedBuilder {}
}
When executing the code, you get the following output:
2020-05-12 15:40:01.180 DEBUG 1 --- [mandProcessor-4] o.a.m.saga.repository.jpa.JpaSagaStore : Updating saga id c8aff7f7-d47f-4616-8a96-a40044cb7e3b as {}
As soon as the general serializer is changed to xstream, the content is serialized properly, but I face another issue during deserialization, since I have private static final class Builder classes using Lombok.
So is there a way for Axon to handle these scenarios:
1- Axon to safely manage Jackson to ignore #Autowired, transient and static properties from #Saga classes? I've attempted to manually define #JsonIgnore at non-state properties and it still didn't work.
2- Axon to safely configure XStream to ignore inner classes (mostly Builder classes implemented as private static final)?
Thanks in advance,
EDIT: I'm pursuing a resolution using my preferred serializer: JSON. I attempted to modify the saga class and extend JsonSerializer<AuctionEventManagerSaga>. For that I implemented the methods:
#Override
public Class<AuctionEventManagerSaga> handledType() {
return AuctionEventManagerSaga.class;
}
#Override
public void serialize(
final AuctionEventManagerSaga value,
final JsonGenerator gen,
final SerializerProvider serializers
) throws IOException {
gen.writeStartObject();
gen.writeObjectField("scheduleToken", value.eventScheduler);
gen.writeObjectField("auctionTimerStart", value.auctionTimerStart);
gen.writeEndObject();
}
Right now, I have something being serialized, but it has nothing to do with the properties I've defined:
2020-05-12 16:20:01.322 DEBUG 1 --- [mandProcessor-0] o.a.m.saga.repository.jpa.JpaSagaStore : Storing saga id c4b5d94c-7251-40a5-accf-332768b1cacd as {"delegatee":null,"unwrappingSerializer":false}
EDIT 2 Decided to add more insight into the issue I experience when I switch general to use XStream (even though it's somewhat unrelated to the main issue described in the title).
Here is the issue it complains to me:
2020-05-12 17:08:06.495 DEBUG 1 --- [ault-executor-0] o.a.a.c.command.AxonServerCommandBus : Received command response [message_identifier: "79631ffb-9a87-4224-bed3-a957730dced7"
error_code: "AXONIQ-4002"
error_message {
message: "No converter available\n---- Debugging information ----\nmessage : No converter available\ntype : jdk.internal.misc.InnocuousThread\nconverter : com.thoughtworks.xstream.converters.reflection.ReflectionConverter\nmessage[1] : Unable to make field private static final jdk.internal.misc.Unsafe jdk.internal.misc.InnocuousThread.UNSAFE accessible: module java.base does not \"opens jdk.internal.misc\" to unnamed module #7728643a\n-------------------------------"
location: "1#600b5b87a922"
details: "No converter available\n---- Debugging information ----\nmessage : No converter available\ntype : jdk.internal.misc.InnocuousThread\nconverter : com.thoughtworks.xstream.converters.reflection.ReflectionConverter\nmessage[1] : Unable to make field private static final jdk.internal.misc.Unsafe jdk.internal.misc.InnocuousThread.UNSAFE accessible: module java.base does not \"opens jdk.internal.misc\" to unnamed module #7728643a\n-------------------------------"
}
request_identifier: "2f7020b1-f655-4649-bbe0-d6f458b3c2f3"
]
2020-05-12 17:08:06.505 WARN 1 --- [ault-executor-0] o.a.c.gateway.DefaultCommandGateway : Command 'ACommandClassDispatchedFromSaga' resulted in org.axonframework.commandhandling.CommandExecutionException(No converter available
---- Debugging information ----
message : No converter available
type : jdk.internal.misc.InnocuousThread
converter : com.thoughtworks.xstream.converters.reflection.ReflectionConverter
message[1] : Unable to make field private static final jdk.internal.misc.Unsafe jdk.internal.misc.InnocuousThread.UNSAFE accessible: module java.base does not "opens jdk.internal.misc" to unnamed module #7728643a
-------------------------------)
Still no luck on resolving this...
I've worked on Axon systems where the only used Serializer implementation was the JacksonSerializer too. Mind you though, this is not what the Axon team recommends. For messages (i.e. commands, events and queries) it makes perfect sense to use JSON as the serialized format. But switching the general Serializer to jackson means you have to litter your domain logic (e.g. your Saga) with Jackson specifics "to make it work".
Regardless, backtracking to my successful use case of jackson-serialized-sagas. In this case we used the correct match of JSON annotations on the fields we desired to take into account (the actual state) and to ignore the one's we didn't want deserialized (with either transient or #JsonIgnore). Why both do not seem to work in your scenario is not entirely clear at this stage.
What I do recall is that the referenced project's team very clearly decided against Lombok due to "overall weirdnes" when it comes to de-/serialization. As a trial it thus might be worth to not use any Lombok annotations/logic in the Saga class and see if you can de-/serialize it correctly in such a state.
If it does work at that moment, I think you have found your culprit for diving in further search.
I know this isn't an exact answer, but I hope it helps you regardless!
Might be worthwhile to share the repository where this problems occurs in; might make the problem clearer for others too.
I was able to resolve the issue #2 when using XStream as general serializer.
One of the Sagas had an #Autowired dependency property that was not transient.
XStream was throwing some cryptic message, but we managed to track the problem and address it.
As for JSON support, we had no luck. We ended up switched everything to XStream for now, as the company only uses Java and it would be ok to decode the events using XStream.
Not the greatest solution, as we really wanted (and hoped) JSON would be supported properly out of the box. Mind you, this is in conjunction with using Lombok which caused for the nuisance in this case.
I just converted a Swift 2 app to Swift 3, using the convert function of Xcode 8.
My code has a class marked as WCSessionDelegate.
In Swift 2 it compiled without the methods sessionDidBecomeInactive and sessionDidDeactivate.
If I compile the Swift 3 version, the compiler complains that my class does not conform to protocol WCSessionDelegate, which is apparently correct.
It then offers to insert stubs for both functions:
public func sessionDidBecomeInactive(_ session: WCSession) { }
public func sessionDidDeactivate(_ session: WCSession) { }
After these stubs are inserted, these errors are reported:
Cannot override 'sessionDidBecomeInactive' which has been marked unavailable
Cannot override 'sessionDidDeactivate' which has been marked unavailable
How can I fix this problem?
Because the delegate methods sessionDidDeactivate and sessionDidBecomeInactive are marked as unavailable on watchOS you will have to make the compiler ignore those pieces of code in the shared class. You can do so using the following preprocessor macro:
#if os(iOS)
public func sessionDidBecomeInactive(_ session: WCSession) { }
public func sessionDidDeactivate(_ session: WCSession) {
session.activate()
}
#endif
Please also note I added the activate call in the sessionDidDeactivate call. This is to re-activate the session on the phone when the user has switched from one paired watch to second paired one. Calling it like this assumes that you have no other threads/part of your code that needs to be given time before the switch occurs. For more information on supporting the quick watch switching you should take a look at the Apple sample code
I have a library, built with Maven, that uses Spring 4.0.3.RELEASE and Togglz 2.2.0.Final. I'm trying to write a JUnit 4.11 test of my Spring class and running into the following error on the first test that gets executed:
testCreateItem_throwsItemServiceBusinessException(impl.ItemServiceImplTest) Time elapsed: 1.771 sec <<< ERROR!
java.util.ServiceConfigurationError: org.togglz.core.spi.LogProvider:
Provider org.togglz.slf4j.Slf4jLogProvider not a subtype
Here is the relevant java test snippet:
#RunWith(SpringJUnit4ClassRunner.class)
#ContextConfiguration(classes = AppConfig.class, loader = AnnotationConfigContextLoader.class)
#PrepareForTest({ ItemServiceImpl.class })
public class ItemServiceImplTest {
#Rule
public TogglzRule togglzRule = TogglzRule.allDisabled(Features.class);
#Rule
public PowerMockRule powerMockRule = new PowerMockRule();
#Test(expected = ItemServiceBusinessException.class)
public void testCreateItem_throwsItemServiceBusinessException() throws Exception {
PowerMockito.doReturn(mockMetricsData).when(serviceUnderTest, START_METRICS_METHOD_NAME, any(MetricsOperationName.class), any(RequestContext.class));
when(mockDao.createItem(any(Item.class), any(RequestContext.class))).thenThrow(dataBusinessException);
serviceUnderTest.createItem(item, context);
verify(mockItemServiceValidator).validate(any(Item.class), any(RequestContext.class));
PowerMockito.verifyPrivate(serviceUnderTest).invoke(START_METRICS_METHOD_NAME, any(MetricsOperationName.class), any(RequestContext.class));
verify(mockDao).createItem(any(Item.class), any(RequestContext.class));
}
}
Subsequent test calls get the following error:
java.lang.NoClassDefFoundError: Could not initialize class org.togglz.junit.TogglzRule
Here are some relevant dependencies I have:
org.mockito:mockito-all=org.mockito:mockito-all:jar:1.9.5:compile,
org.powermock:powermock-module-junit4=org.powermock:powermock-module-junit4:jar:1.5.6:test,org.powermock:powermock-module-junit4-common=org.powermock:powermock-module-junit4-common:jar:1.5.6:test,
org.powermock:powermock-reflect=org.powermock:powermock-reflect:jar:1.5.6:test,
org.powermock:powermock-api-mockito=org.powermock:powermock-api-mockito:jar:1.5.6:test,
org.powermock:powermock-api-support=org.powermock:powermock-api-support:jar:1.5.6:test,
org.powermock:powermock-module-junit4-rule=org.powermock:powermock-module-junit4-rule:jar:1.5.6:test,
org.powermock:powermock-classloading-base=org.powermock:powermock-classloading-base:jar:1.5.6:test,
org.powermock:powermock-core=org.powermock:powermock-core:jar:1.5.6:test,
org.powermock:powermock-classloading-xstream=org.powermock:powermock-classloading-xstream:jar:1.5.6:test,
org.togglz:togglz-core=org.togglz:togglz-core:jar:2.2.0.Final:compile,
org.togglz:togglz-slf4j=org.togglz:togglz-slf4j:jar:2.2.0.Final:compile,
org.togglz:togglz-spring-core=org.togglz:togglz-spring-core:jar:2.2.0.Final:compile,
org.togglz:togglz-testing=org.togglz:togglz-testing:jar:2.2.0.Final:test,
org.togglz:togglz-junit=org.togglz:togglz-junit:jar:2.2.0.Final:test
And I have provided a LogProvider (org.togglz.slf4j.Slf4jLogProvider) via SPI, located at META-INF/serivces/org.togglz.core.spi.LogProvider
This error is baffling as Slf4jLogProvider should be assignable from LogProvider. Sorry for the verbosity, but I wanted to try and show a complete picture. The code in class "under test" is making a call to see if a single feature is enabled inside the create method.
First of all: You don't need to configure the log provider in your application. Including togglz-slf4j on your application path is sufficient because this jar contains the corresponding SPI file.
Could you please check if there are multiple conflicting versions of the Togglz JAR files on your classpath? For example using togglz-core-2.2.0.Final.jar together with togglz-slf4j-2.1.0.Final.jar could result in an error like this.
This can happen if you update Togglz and your IDE didn't remove the old archives. Running a clean build and/or selecting "Update Maven Configuration" on Eclipse will fix this problem.
I'm facing weird behavior with JBoss AS 7 and my application which uses EJB3.1.
I successfully lookup bean but when Im trying to cast it to its interface, exception is thrown.
Code in short:
#Local
public interface BusinessObjectsFactory { ... }
#Stateless
#Local(BusinessObjectsFactory.class)
public class JPABusinessObjectsFactory implements BusinessObjectsFactory { ... }
...
Object obj = ctx.lookup("java:app/moduleName/" +
"JPABusinessObjectsFactory!pckg.BusinessObjectsFactory");
Class c = obj.getClass();
System.out.println(c.getName()); // pckg.BusinessObjectsFactory$$$view36
System.out.println(c.getInterfaces()[0].getName()); // BusinessObjectsFactory
BusinessObjectsFactory bof = (BusinessObjectsFactory) obj; //cast exception
Any ideas? Note that interface is needed (which implementation is looked up is read from configuration file and might change)
I switched to another lookup strategy while this is no longer issue for me. I'm not sure if this is still present in newest versions of JBoss/Wildfly AS. That's why I'm closing this question.