Passing to Java int[] from Jython PyList - reflection

Now I am stucked with the specific question, asking for you guys' help.
KeyWords:
Java Reflection, Jython PyList, NoSuchMethodException
Java Side:
targetMethod(int []) is the method exactly I want to call by reflecting. Do pay attention to the int [] param.
Jython Side:
l_params = [1,2,3]
Problem:
When I tried to do the reflection call by passing type(l_params), got info below:
java.lang.NoSuchMethodException: targetMethod(org.python.core.PyList)
at java.lang.Class.getDeclaredMethod(Unknown Source)
So how to deal with it? Hoping to get a light from you.

Yeap, one possible solution —— Proxy:
Jython ----Java Proxy ---- Target Method
Though the Target Method is un-controllable, we can do whatever we want to within the Java Proxy.
But how to want to solve this without the proxy ?
//added at 2015/11/23
Thanks to the flexibility of jython, now i just fix this by mixing jython and java
jython side:
import javaArray
java.getType(paramType)
java side: //javaArray.java
public static Class getType(String strType)
{
if (strType.equals("[I"))
return (new int[0]).getClass();
}
Really need to dig more about jython, java, if you want to hack on it.
Thanks.
//
//added at 2015/11/26
Really a shame to write code like that without using Class.forName.........
public static Class getType(String strType)
{
//try...catch
ret = Class.forName(strType);
return ret;
}

Related

JpaSagaStore in conjunction with Jackson unable to properly store state

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.

library module upgrade to Glide 4, where should the AppGlideModule be put in

In library module to upgrade to Glide 4.9.0.
api "com.github.bumptech.glide:glide:4.9.0"
api "com.github.bumptech.glide:annotations:4.9.0"
annotationProcessor "com.github.bumptech.glide:compiler:4.9.0"
and having a kotlin extension
fun ImageView.loadImg(imageUrl: String) {
// 4.+ code
var requestOptions : RequestOptions = RequestOptions()
.placeholder(ColorDrawable(Color.LTGRAY))
.diskCacheStrategy(DiskCacheStrategy.ALL)
if (!TextUtils.isEmpty(imageUrl)) {
Glide.with(context)
.setDefaultRequestOptions(requestOptions) // or use .apply(requestOptions) but after the .load()
.asBitmap()
.load(imageUrl)
.into(this)
}
}
but it crashes
java.lang.AbstractMethodError: abstract method "void com.bumptech.glide.module.RegistersComponents.registerComponents(android.content.Context, com.bumptech.glide.Glide, com.bumptech.glide.Registry)"
at com.bumptech.glide.Glide.initializeGlide(Glide.java:270)
at com.bumptech.glide.Glide.initializeGlide(Glide.java:223)
at com.bumptech.glide.Glide.checkAndInitializeGlide(Glide.java:184)
at com.bumptech.glide.Glide.get(Glide.java:168)
at com.bumptech.glide.Glide.getRetriever(Glide.java:689)
at com.bumptech.glide.Glide.with(Glide.java:716)
at com.common.extentions.ExtensionsKt.loadImg(Extensions.kt:44)
After adding
#GlideModule
class TheAppGlideModule : AppGlideModule() {
override fun isManifestParsingEnabled(): Boolean {
return false
}
}
to the library module does not help, or adding it to hosting app only does not work either,
but after adding it to both the library module and the hosting app the crash goes away.
according to documentation https://bumptech.github.io/glide/doc/generatedapi.html,
isnt it that it not supposed to have this class defined in the library module?
anyone has same experience?
* For now the API is only generated when a properly annotated AppGlideModule is found.
* There can only be one AppGlideModule per application.
* As a result it’s not possible to generate the API for a library without precluding any application
* that uses the library from using the generated API.
Resolved, it has missed
api "com.github.bumptech.glide:annotations:$versions.glide"
in the application side (not sure why adding single one in the module did not work and why with both it worked, maybe didnt do clear/rebuild after change?)

Examples to use netflix-feign outside of spring-boot

I m looking for a example how to use netflix-feign from a NO-spring-boot app.
I have a existing SpringMVC (4.2) webapp. Now i build some "microservices" with Spring-boot + (eureka, feign) and i want to use those as backend serivces from the webapp.
thanks in advance
In the github repo you can see a few examples to use feign-client:
https://github.com/OpenFeign/feign
Basically, you would need to create an interface annotated with feign annotations and not with the Spring, one example would be (you can see much more in the github page):
public interface YourClient {
#RequestLine("POST /")
#Headers("Content-Type: application/json")
Response getSomething(#Param("id") String id);
}
Then to instantiate your feign client it's need to use its builder Feign. It's easy, and configurable:
YourClient yourClient = Feign.builder()
.decoder(new GsonDecoder()) // you could use Gson, Jackson,...
.target(YourClient .class, "https://your.url");
Then you can use it just invoking the method you want:
yourClient.getSomething("myId");

Symfony 2 Service Error on unit Testing

I make some functional test with Symfony 2 and phpunit.
But i've some trouble with a Service.
Let me explain.
During my run test, i want to use some service used by the application. So i juste set my setUp function for setting the kernel :
static::$kernel = static::createKernel();
static::$kernel->boot();
$this->objectFactory = static::$kernel->getContainer()->get('some.application.objectfactory');
So i've this and in my function i need to used a service that return an object so i call my service like that
$var = $this->objectFactory->getObject($id);
and obviously in my tearDown function i just :
protected function tearDown()
{
$this->client->restart();
unset($this->client, $this->objectFactory);
}
So my problem is when i run a test i've this message :
Symfony\Component\DependencyInjection\Exception\InactiveScopeException: You cannot create a service ("request") of an inactive scope ("request").
And i can't find a way to solve this.
Did someone have any idea ??
My version of Symfony is 2.2.1 and my version of phpunit is 3.7.19
If someone can help me, i could be very happy.
I'm sorry if my English isn't so good.
EDIT
Maybe it could help someone, in the service i used that : :
$request = $this->container->get('request');
It seems to be the reason why it dosen't work, when i remove it, it doesn't say the error, but they still doesn't work.
EDIT
#Cyprian
According to you have change my code for what i want.
So i just add to my service, in the function that i want, the client (Client web test case), and then inside the function i just add this :
if (isset($client)) {
$request = $client->getRequest();
} else {
$request = $this->container->get('request');
}
So in my function where i call the service i've just this :
public function getObject($id)
{
//Get the service from the kernel
$service = static::$kernel->getContainer()->get('service');
$object = $service->getObject($id, $this->client);
}
and it works fine like this
#nifr
Your idea doesn't work for me, but i think your idea wasn't wrong, they just not works in my case
However Thanks for your help, i'm happy i works now, and i expect that post could help someone else
Try get request from the client, not service container:
$request = $this->client->getRequest();
In that way you can also get kernel and/or container:
$kernel = $this->client->getKernel();
$container = $this->client->getContainer();
One more useful tip: kernel from the client is rebooted between each two requests. So, for example if you pass your mock to client's container and do some request, in next request (after the first one) the container will not contain your mock.
There is no request available in phpUnit as long as you don't construct one.
If you want to test a request. create it like this:
use Symfony\Component\HttpFoundation\Request;
protected $request;
public function setUp()
{
// ...
$this->request = new Request();
// ... modify your request acccording to your needs
}
and add/call a setter in your Service using the request.
$service = $this->kernel->getContainer()->get('your_service')
$service->setRequest($this->request);
or create a Functional Test with WebtestCase.

Accessing services directory when setting up Zend AMF in Codeigniter

I followed the instructions in this tutorial to set up Zend AMF as a way of passing data from my flash app to my PHP app:
http://codeigniter.com/forums/viewthread/180414/
So I have the directory structure and everything as described there. This is my gateway controller:
class Gateway extends CI_Controller
{
function __construct()
{
parent::__construct();
$this->load->library('zend');
//root_folder + application + controllers + amf + services
define('SERVICES_FOLDER', APPPATH.'controllers/amf/services/');
}
public function index()
{
$server = new Zend_Amf_Server();
$server->setProduction(false);
//$server->addFunction('testservice');
$server->addDirectory(SERVICES_FOLDER);
echo $server->handle();
}
}
And the APPPATH is /application/ so the path defined by SERVIES_FOLDER is "/application/controllers/amf/services" which is where my file 'testservice.php' sits.
When I try and connect to that service in flash:
var gateway:String = "http://mysite.com/amf/gateway";
con.connect(gateway);
con.call("Testservice.getMessage", new Responder(onResult, onFault));
It calls the onFault method and displays the error:
Plugin by name 'Testservice' was not found in the registry;
Which makes me think that the addDirectory() line in Gateway.php was the problem somehow. Interestingly, I also cannot access the testservice function through a URL, ie by going to mysite.com/amf/services/testservice.
Any thoughts on what might be going on here?
Figured it out, sort of.
Instead of using the addDirectory method which I was having no luck with, I used the setClass method and created another class within the gateway.php file that has the functions, and now I can connect to those functions from flash.
I had an issue with this when using parent::__construct() in my service controllers. Once I removed that, the problem went away.

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