Having a hell of a time making SymmetricDS java extension points work.
This is what I've tried:
1. created this class:
package com.gourmet.listener;
import org.jumpmind.symmetric.ISymmetricEngine;
import org.jumpmind.symmetric.ext.ISymmetricEngineAware;
import org.jumpmind.symmetric.model.BatchAck;
import org.jumpmind.symmetric.transport.IAcknowledgeEventListener;
public class AcknowledgeListener implements IAcknowledgeEventListener, ISymmetricEngineAware {
ISymmetricEngine _engine;
#Override
public void onAcknowledgeEvent(BatchAck batchInfo) {
if (!batchInfo.isOk()) {
System.out.println("bachInfo is not OK " + batchInfo);
return;
}
System.out.println("received event!!!!!!! {}" + batchInfo);
}
#Override
public void setSymmetricEngine(ISymmetricEngine engine) {
_engine = engine;
}
}
2. Placed `Manifest.txt in the same package location as AcknowledgeListener.java
Class-Path: symmetric-core-3.12.7.jar symmetric-util-3.12.7.jar
3. Generated jar file with AcknowledgeListener and placed it in WEB-INF/lib
cd /gourmet3/mobile-webpage/src/main/java
javac -cp ".:/gourmet3/mobile-webpage/target/gourmet/WEB-INF/lib/symmetric-util-3.12.7.jar:/gourmet3/mobile-webpage/target/gourmet/WEB-INF/lib/symmetric-core-3.12.7.jar" com/gourmet/listener/AcknowledgeListener.java
jar cfm com/gourmet/listener/AcknowledgeListener.jar com/gourmet/listener/Manifest.txt com/gourmet/listener/*.class
mv com/gourmet/listener/AcknowledgeListener.jar /gourmet3/mobile-webpage/src/main/webapp/WEB-INF/lib
rm com/gourmet/listener/AcknowledgeListener.*
This is the result:
MANIFEST.MF:
Manifest-Version: 1.0
Class-Path: symmetric-core-3.12.7.jar symmetric-util-3.12.7.jar
Created-By: 1.8.0_272 (Azul Systems, Inc.)
As SymmetricDS 3.2 documentation states, I created conf/symmetric-extensions.xml so spring finds the bean.
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<bean id="acknowledgeListener" class="com.gourmet.listener.AcknowledgeListener"/>
</beans>
Created the sym_extension entry SQL in the server and client databases
insert into sym_extension (extension_id, extension_type, interface_name, node_group_id, enabled, extension_order,
extension_text, create_time, last_update_by, last_update_time)
values ('acknowledge batch', 'java', 'org.jumpmind.symmetric.transport.IAcknowledgeEventListener','sucursal', 1, 1,
'
import org.jumpmind.symmetric.ISymmetricEngine;
import org.jumpmind.symmetric.ext.ISymmetricEngineAware;
import org.jumpmind.symmetric.model.BatchAck;
import org.jumpmind.symmetric.transport.IAcknowledgeEventListener;
public class AcknowledgeListener implements IAcknowledgeEventListener, ISymmetricEngineAware {
ISymmetricEngine _engine;
#Override
public void onAcknowledgeEvent(BatchAck batchInfo) {
if (!batchInfo.isOk()) {
System.out.println("bachInfo is not OK " + batchInfo);
return;
}
System.out.println("received event!!!!!!! {}" + batchInfo);
}
#Override
public void setSymmetricEngine(ISymmetricEngine engine) {
_engine = engine;
}
}
', current_timestamp, 'some user', current_timestamp);
And when I try to run the Sym Client, i always get an exception.
20 Mar 2021 20:17:10 ERROR [org.jumpmind.symmetric.service.impl.ExtensionService] - <Error while compiling Java extension acknowledge batch>
org.jumpmind.util.SimpleClassCompilerException: Compilation of 'AcknowledgeListener' failed.
AcknowledgeListener at line 2, column 30: package org.jumpmind.symmetric does not exist
AcknowledgeListener at line 3, column 34: package org.jumpmind.symmetric.ext does not exist
AcknowledgeListener at line 4, column 36: package org.jumpmind.symmetric.model does not exist
AcknowledgeListener at line 5, column 40: package org.jumpmind.symmetric.transport does not exist
AcknowledgeListener at line 7, column 46: cannot find symbol
symbol: class IAcknowledgeEventListener
AcknowledgeListener at line 7, column 73: cannot find symbol
symbol: class ISymmetricEngineAware
AcknowledgeListener at line 8, column 5: cannot find symbol
symbol: class ISymmetricEngine
location: class SimpleClassCompiler0
AcknowledgeListener at line 12, column 36: cannot find symbol
symbol: class BatchAck
location: class SimpleClassCompiler0
AcknowledgeListener at line 21, column 36: cannot find symbol
symbol: class ISymmetricEngine
location: class SimpleClassCompiler0
AcknowledgeListener at line 11, column 5: method does not override or implement a method from a supertype
AcknowledgeListener at line 20, column 5: method does not override or implement a method from a supertype
at org.jumpmind.util.SimpleClassCompiler.getCompiledClass(SimpleClassCompiler.java:119)
at org.jumpmind.symmetric.service.impl.ExtensionService.registerExtension(ExtensionService.java:110)
at org.jumpmind.symmetric.service.impl.ExtensionService.refresh(ExtensionService.java:101)
at org.jumpmind.symmetric.service.impl.ClientExtensionService.refresh(ClientExtensionService.java:46)
at org.jumpmind.symmetric.AbstractSymmetricEngine.init(AbstractSymmetricEngine.java:348)
at org.jumpmind.symmetric.ClientSymmetricEngine.init(ClientSymmetricEngine.java:205)
at org.jumpmind.symmetric.ClientSymmetricEngine.<init>(ClientSymmetricEngine.java:148)
at org.jumpmind.symmetric.ClientSymmetricEngine.<init>(ClientSymmetricEngine.java:152)
at com.gourmet.symmetricds.SymDSStarter.postConstruct(SymDSStarter.java:54)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:346)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:299)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:132)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:394)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1448)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:609)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:469)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:383)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4705)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5171)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:743)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:719)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:705)
at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1663)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:286)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:482)
at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:431)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:286)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
at com.sun.jmx.remote.security.MBeanServerAccessController.invoke(MBeanServerAccessController.java:468)
at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468)
at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76)
at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1309)
at java.security.AccessController.doPrivileged(Native Method)
at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1408)
at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:357)
at sun.rmi.transport.Transport$1.run(Transport.java:200)
at sun.rmi.transport.Transport$1.run(Transport.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:196)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:573)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:834)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:688)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:687)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Notes:
I've tried with & without package com.gourmet.listener; path in the SQL script.
I removed the java and compiled .class files from com.gourmet.listener package.
symmetric-core-3.12.7.jar, symmetric-util-3.12.7.jar and AcknowledgeListener.jar exist into WEB-INF/lib.
So, not sure what am I missing?
HAAALP!
EDIT
This is so weird, I commented out the script which inserts into sym_extension and deleted all table rows (from server and client DBs), .jar file was left in WEB-INF\lib and the java file in the package where I compiled it, and suddenly it worked and I'm even able to debug. Why is symmetricDS even calling it when there's no rows in the sym_extension table??
The class that's extending basic functionality should not be placed in a custom package. Drop the line:
package com.gourmet.listener;
Then add the file conf/symmetric-extensions.xml with this content:
<?xml version="1.0" encoding="UTF-8"?>
<!--
Licensed to JumpMind Inc under one or more contributor
license agreements. See the NOTICE file distributed
with this work for additional information regarding
copyright ownership. JumpMind Inc licenses this file
to you under the GNU General Public License, version 3.0 (GPLv3)
(the "License"); you may not use this file except in compliance
with the License.
You should have received a copy of the GNU General Public License,
version 3.0 (GPLv3) along with this library; if not, see
<http://www.gnu.org/licenses/>.
Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
-->
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"
default-lazy-init="true">
<bean id="acknowledgeListener" class="AcknowledgeListener" />
</beans>
If you use sym_extension table for your extension code, then there is nothing more to do. The advantage is your extension becomes part of the configuration. You deployed SymmetricDS to Tomcat, and it looks like its classloader hierarchy is preventing compilation. If you use the standalone SymmetricDS server, it will work.
If you compile your code to a JAR, you can put a Spring XML file into the JAR named symmetric-extensions.xml in the "conf" sub-directory that will register your extension as a Spring bean. Or you can edit the file conf/symmetric-extensions.xml that is part of the SymmetricDS installation. I prefer putting the file in the JAR so it is self-contained.
I have a java project (tomcat webapp) with some REST Api. I want to generate swagger documentation for them. I started from this tutorial (github).
I don't have maven we use an ant task. I included swagger-annotations-1.5.0.jar and all jar that cames with swagger-jaxrs JAR 1.5.0 version( I can include a complete list if it is useful)
I've annotated some method and I have a configuration class like this:
#ApplicationPath("/api")
public class Configurator extends Application {
public Configurator() {
init();
}
private void init() {
BeanConfig beanConfig = new BeanConfig();
beanConfig.setVersion("1.0.0");
beanConfig.setSchemes(new String[]{"http"});
beanConfig.setHost("myserver.it:8080");
beanConfig.setBasePath("/swagger-demo/api");
beanConfig.setResourcePackage("myserver.rest");
beanConfig.setTitle("RESTEasy, Swagger and Swagger UI Example");
beanConfig.setScan(true);
}
}
when I deploy it agains tomcat 9 I can see this log in localhost.log file
java.lang.NoSuchMethodError: io.swagger.util.Json.create()Lcom/fasterxml/jackson/databind/ObjectMapper;
at io.swagger.jaxrs.json.JacksonJsonProvider.(JacksonJsonProvider.java:30)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.glassfish.hk2.utilities.reflection.ReflectionHelper.makeMe(ReflectionHelper.java:1375)
at org.jvnet.hk2.internal.ClazzCreator.createMe(ClazzCreator.java:272)
at org.jvnet.hk2.internal.ClazzCreator.create(ClazzCreator.java:366)
at org.jvnet.hk2.internal.SystemDescriptor.create(SystemDescriptor.java:487)
at org.jvnet.hk2.internal.SingletonContext$1.compute(SingletonContext.java:83)
at org.jvnet.hk2.internal.SingletonContext$1.compute(SingletonContext.java:71)
at org.glassfish.hk2.utilities.cache.Cache$OriginThreadAwareFuture$1.call(Cache.java:97)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.glassfish.hk2.utilities.cache.Cache$OriginThreadAwareFuture.run(Cache.java:154)
at org.glassfish.hk2.utilities.cache.Cache.compute(Cache.java:199)
at org.jvnet.hk2.internal.SingletonContext.findOrCreate(SingletonContext.java:122)
at org.jvnet.hk2.internal.Utilities.createService(Utilities.java:2126)
at org.jvnet.hk2.internal.ServiceHandleImpl.getService(ServiceHandleImpl.java:116)
at org.jvnet.hk2.internal.ServiceHandleImpl.getService(ServiceHandleImpl.java:90)
at org.glassfish.jersey.inject.hk2.AbstractHk2InjectionManager.lambda$getAllServiceHolders$0(AbstractHk2InjectionManager.java:160)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at java.util.LinkedList$LLSpliterator.forEachRemaining(LinkedList.java:1235)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
at org.glassfish.jersey.inject.hk2.AbstractHk2InjectionManager.getAllServiceHolders(AbstractHk2InjectionManager.java:164)
at org.glassfish.jersey.inject.hk2.ImmediateHk2InjectionManager.getAllServiceHolders(ImmediateHk2InjectionManager.java:54)
at org.glassfish.jersey.internal.inject.Providers.getServiceHolders(Providers.java:337)
at org.glassfish.jersey.internal.inject.Providers.getCustomProviders(Providers.java:175)
at org.glassfish.jersey.message.internal.MessageBodyFactory.initialize(MessageBodyFactory.java:238)
at org.glassfish.jersey.message.internal.MessageBodyFactory$MessageBodyWorkersConfigurator.postInit(MessageBodyFactory.java:136)
at org.glassfish.jersey.server.ApplicationHandler.lambda$initialize$2(ApplicationHandler.java:372)
at java.util.Arrays$ArrayList.forEach(Arrays.java:3880)
at org.glassfish.jersey.server.ApplicationHandler.initialize(ApplicationHandler.java:372)
at org.glassfish.jersey.server.ApplicationHandler.lambda$initialize$1(ApplicationHandler.java:316)
at org.glassfish.jersey.internal.Errors.process(Errors.java:316)
at org.glassfish.jersey.internal.Errors.process(Errors.java:298)
at org.glassfish.jersey.internal.Errors.processWithException(Errors.java:256)
at org.glassfish.jersey.server.ApplicationHandler.initialize(ApplicationHandler.java:315)
at org.glassfish.jersey.server.ApplicationHandler.(ApplicationHandler.java:282)
at org.glassfish.jersey.servlet.WebComponent.(WebComponent.java:335)
at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:178)
at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:370)
at javax.servlet.GenericServlet.init(GenericServlet.java:158)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1124)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:974)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4813)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5125)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3700)
at org.apache.catalina.loader.WebappLoader.backgroundProcess(WebappLoader.java:292)
at org.apache.catalina.core.StandardContext.backgroundProcess(StandardContext.java:5447)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1396)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1400)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1400)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1368)
at java.lang.Thread.run(Thread.java:748)
If I try to reach http://myserver.it:8080/swagger-demo/api/ this give me 404 error.
I read this post about this error (here) but I really can't say what's wrong. I'm strugglin.
Any hints would be appreciated
I answer to myself since I finally find a solution. Problem was inconsistency with libraries. I solved using this site Jar download, that gives me all the dependencies. Then I compare some libraries that I already jave in my project and in caso of conflict I choose the newest one.
I am currently experiencing a weird exception when testing my Scala - Spring Boot application with JUnit Vintage.
java.lang.IncompatibleClassChangeError: org.myapp.SampleWebApplication and org.myapp.SampleWebApplication$delayedInit$body disagree on InnerClasses attribute
at java.lang.Class.getDeclaringClass0(Native Method)
at java.lang.Class.getDeclaringClass(Class.java:1235)
at java.lang.Class.getEnclosingClass(Class.java:1277)
at java.lang.Class.getSimpleBinaryName(Class.java:1443)
at java.lang.Class.isMemberClass(Class.java:1433)
at org.junit.internal.builders.AnnotatedBuilder.getEnclosingClassForNonStaticMemberClass(AnnotatedBuilder.java:94)
at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:83)
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)
at org.junit.vintage.engine.discovery.DefensiveAllDefaultPossibilitiesBuilder.runnerForClass(DefensiveAllDefaultPossibilitiesBuilder.java:56)
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
at org.junit.vintage.engine.discovery.TestClassRequestResolver.createRunnerTestDescriptor(TestClassRequestResolver.java:55)
at org.junit.vintage.engine.discovery.VintageDiscoverer.lambda$discover$0(VintageDiscoverer.java:53)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at java.util.Iterator.forEachRemaining(Iterator.java:116)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
at java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:312)
at java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:742)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
at org.junit.vintage.engine.discovery.VintageDiscoverer.discover(VintageDiscoverer.java:55)
at org.junit.vintage.engine.VintageTestEngine.discover(VintageTestEngine.java:61)
at org.junit.platform.launcher.core.DefaultLauncher.discoverEngineRoot(DefaultLauncher.java:130)
at org.junit.platform.launcher.core.DefaultLauncher.discoverRoot(DefaultLauncher.java:117)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:90)
at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:74)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
This is the entrypoint and it's the class that throws the error.
object SampleWebApplication extends App{
SpringApplication.run(classOf[Application])
}
HOWEVER! If I change the code to this (without extending app) the error stops appearing.
object SampleWebApplication {
def main(args : Array[String]) : Unit = {
SpringApplication.run(classOf[Application])
}
}
Do you have any suggestions on why I am experiencing this error? Why does removing "extends App" solve my issue?
Any help really appreciated.
I found out the issue. There is a bug in Scala 2.12.6 (fixed in 2.13.x). Because of the project I'm currently working on I can't bump the versions.
Workarounds if you cant update your Scala version:
1.One workaround is to update the test framework from JUnit Vintage -> JUnit Jupiter.
2.The second workaround (the one I did) is to change the Entrypoint of your application (see below).
object SampleWebApplication {
def main(args : Array[String]) : Unit = {
SpringApplication.run(classOf[Application])
}
}
I am trying to integrate fluent-logger-java with a springboot project with a logback appender. And I am able to send data to a fluentd aggregator with the sample code given in https://github.com/fluent/fluent-logger-java
But when added as a logback appender, it throws NullPointerException.
I have tried to use logback-more-appenders from https://mvnrepository.com/artifact/com.sndyuk/logback-more-appenders/1.4.3.
But it is not sending any data from the application.
To reproduce the issue, generate a simple web project from https://start.spring.io/ with defaults.
Add src\main\java\com\example\demo\FluentLogbackAppender.java to the project
package com.example.demo;
import java.util.HashMap;
import java.util.Map;
import org.fluentd.logger.FluentLogger;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.UnsynchronizedAppenderBase;
public class FluentLogbackAppender extends UnsynchronizedAppenderBase<ILoggingEvent> {
private FluentLogger fluentLogger;
private String label = "test";
#Override
public void start() {
super.start();
this.fluentLogger = FluentLogger.getLogger(label, "localhost", 24224);
Map<String, Object> data = new HashMap<String, Object>();
data.put("msg", "Starting App");
fluentLogger.log(label, data);
}
#Override
protected void append(ILoggingEvent rawData) {
String msg = rawData.toString();
Map<String, Object> data = new HashMap<String, Object>(1);
data.put("msg", msg);
fluentLogger.log(label, data);
}
#Override
public void stop() {
super.stop();
fluentLogger.close();
}
}
Add src\main\resources\logback.xml to the project
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE logback>
<configuration>
<include resource="org/springframework/boot/logging/logback/base.xml"/>
<appender name="fluent" class="com.example.demo.FluentLogbackAppender"/>
<root level="info" additivity="false">
<appender-ref ref="fluent" />
</root>
</configuration>
Adding the dependency in pom.xml
<dependency>
<groupId>org.fluentd</groupId>
<artifactId>fluent-logger</artifactId>
<version>0.3.3</version>
</dependency>
I have stripped some code to make it simple.
When running this, I am presented with
2018-05-22 14:39:42.190 ERROR 18788 --- [ main] o.s.boot.SpringApplication : Application run failed
java.lang.IllegalStateException: Logback configuration error detected:
ERROR in ch.qos.logback.core.joran.spi.Interpreter#5:77 - RuntimeException in Action for tag [appender] java.lang.NullPointerException
at org.springframework.boot.logging.logback.LogbackLoggingSystem.loadConfiguration(LogbackLoggingSystem.java:166)
at org.springframework.boot.logging.logback.LogbackLoggingSystem.reinitialize(LogbackLoggingSystem.java:212)
at org.springframework.boot.logging.AbstractLoggingSystem.initializeWithConventions(AbstractLoggingSystem.java:75)
at org.springframework.boot.logging.AbstractLoggingSystem.initialize(AbstractLoggingSystem.java:60)
at org.springframework.boot.logging.logback.LogbackLoggingSystem.initialize(LogbackLoggingSystem.java:114)
at org.springframework.boot.context.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:264)
at org.springframework.boot.context.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:237)
at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:200)
at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:173)
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:127)
at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:74)
at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:54)
at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:358)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:317)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243)
at com.example.demo.DemoApplication.main(DemoApplication.java:10)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:50)
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51)
NullPointerException is returned from sender.emit() inside FluentLogger class.
The interesting thing is, this code actually pushes the data to fluentd aggregator just before crash.
Is there any way to make this work.
I am guessing, you did not paste full code here. I think your class might have getter, setter for tag field. If so then your logback configuration is missing <tag>test</tag> which might be the reason(still guess). FluentLogger has lot of open issues and they recommend to use fluency client library for flushing data to fluentd.
Some references -
https://github.com/fluent/fluent-logger-java/issues/72
https://github.com/sndyuk/logback-more-appenders/blob/master/src/main/java/ch/qos/logback/more/appenders/FluencyLogbackAppender.java
https://github.com/komamitsu/fluency
We're in the processing of moving a Weblogic 10.3.6 app to Weblogic 12.2.1.2. We have many EJB 2.1 beans that form part of the app. We've hit a strange problem with some of these beans.
When we have 1 ejb call another and this bean throws a checked exception (e.g. RuleException extends Exception) this is thrown as a RemoteException (RemoteEJBInvokeException). This only occurs if the app is running in a cluster. If I deploy against a standalone jvm it works fine.
The general EJB pattern is a Facade pattern. In the Facade bean we use a standard JNDI lookup to locate the Home and then run the create method to return the business interface/impl
InitialContext ctx = new InitialContext();
ReportManagementHome reportManagementHome = (ReportManagementHome) ctx.lookup("ReportManagement");
ReportManagement reportManagement = reportManagementHome.create();
ReportManagement bean runs the business logic and throws a RuleException.
This is an example method in the facade that calls the 2nd bean:
public String doTest() {
String s = null;
try
{
s = reportManagement.doValidate();
}
catch ( RuleException re )
{
rollBack();
} catch (RemoteException e)
{
e.printStackTrace();
}
return s;
}
Here is the doValidate() method in the 2nd bean:
public String doValidate( )
throws RuleException, CustomException
{
int test = 1;
if (test == 1)
{
throw new RuleException();
}
return "Hello";
}
Although the RuleException is correctly reached and thrown, by the time the facade catches it it is a RemoteException.
This is an example list of the ejbs/interfaces:
ReportManagement
ReportManagementBean
ReportManagementFacade
ReportManagementFacadeBean
ReportManagementFacadeHome
ReportManagementFacadeLocal
ReportManagementFacadeLocalHome
ReportManagementHome
ReportManagementLocal
ReportManagementLocalHome
Here is the ejb-jar.xml
<?xml version='1.0' encoding='UTF-8'?>
<ejb-jar xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/ejb-jar_2_1.xsd"
version="2.1">
<enterprise-beans>
<session>
<display-name>ReportManagementFacade</display-name>
<ejb-name>ReportManagementFacade</ejb-name>
<home>com.ejb.ReportManagementFacadeHome</home>
<remote>com.ejb.ReportManagementFacade</remote>
<local-home>com.ejb.ReportManagementFacadeLocalHome</local-home>
<local>com.ejb.ReportManagementFacadeLocal</local>
<ejb-class>com.ejb.ReportManagementFacadeBean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>
</session>
<session>
<display-name>ReportManagement</display-name>
<ejb-name>ReportManagement</ejb-name>
<home>com.ejb.ReportManagementHome</home>
<remote>com.ejb.ReportManagement</remote>
<local-home>com.ejb.ReportManagementLocalHome</local-home>
<local>com.ejb.ReportManagementLocal</local>
<ejb-class>com.ejb.ReportManagementBean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>
</session>
</enterprise-beans>
<assembly-descriptor>
<container-transaction>
<method>
<ejb-name>ReportManagementFacade</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>Required</trans-attribute>
</container-transaction>
<container-transaction>
<method>
<ejb-name>ReportManagement</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>Required</trans-attribute>
</container-transaction>
</assembly-descriptor>
</ejb-jar>
Here is the weblogic-ejb-jar.xml
<?xml version='1.0' encoding='UTF-8'?>
<weblogic-ejb-jar xmlns="http://xmlns.oracle.com/weblogic/weblogic-ejb-jar"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.oracle.com/weblogic/weblogic-ejb-jar http://xmlns.oracle.com/weblogic/weblogic-ejb-jar/1.2/weblogic-ejb-jar.xsd">
<weblogic-enterprise-bean>
<ejb-name>ReportManagementFacade</ejb-name>
<jndi-name>Destin8.ejb.reportmanagement.ReportManagementFacade</jndi-name>
<local-jndi-name>Destin8.ejb.reportmanagement.ReportManagementFacadeLocal</local-jndi-name>
<enable-call-by-reference>true</enable-call-by-reference>
</weblogic-enterprise-bean>
<weblogic-enterprise-bean>
<ejb-name>ReportManagement</ejb-name>
<jndi-name>Destin8.ejb.reportmanagement.ReportManagement</jndi-name>
<local-jndi-name>Destin8.ejb.reportmanagement.ReportManagementLocal</local-jndi-name>
<enable-call-by-reference>true</enable-call-by-reference>
</weblogic-enterprise-bean>
<weblogic-compatibility>
<entity-always-uses-transaction>true</entity-always-uses-transaction>
</weblogic-compatibility>
</weblogic-ejb-jar>
And here is the StackTrace:
weblogic.rmi.RemoteEJBInvokeException: null; nested exception is:
com.exception.RuleException
at weblogic.ejb.container.internal.SessionRemoteMethodInvoker.invoke(SessionRemoteMethodInvoker.java:27)
at com.ejb.ReportManagement_tq6u66_EOImpl.doLUMValidate(Unknown Source)
at com.ejb.ReportManagementFacadeBean.doLUM(ReportManagementFacadeBean.java:82)
at com.ejb.ReportManagementFacade_sidvua_EOImpl.__WL_invoke(Unknown Source)
at weblogic.ejb.container.internal.SessionRemoteMethodInvoker.invokeInternal(SessionRemoteMethodInvoker.java:54)
at weblogic.ejb.container.internal.SessionRemoteMethodInvoker.invoke(SessionRemoteMethodInvoker.java:21)
at com.ejb.ReportManagementFacade_sidvua_EOImpl.doLUM(Unknown Source)
at com.ajf.Page1ManagedBean.refreshDate(Page1ManagedBean.java:105)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:181)
at com.sun.el.parser.AstValue.invoke(AstValue.java:289)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304)
at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40)
at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)
at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40)
at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
at javax.faces.component.UICommand.broadcast(UICommand.java:315)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:650)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:286)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:260)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:137)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:350)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:25)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:78)
at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:32)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:78)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3683)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3649)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:326)
at weblogic.security.service.SecurityManager.runAsForUserCode(SecurityManager.java:197)
at weblogic.servlet.provider.WlsSecurityProvider.runAsForUserCode(WlsSecurityProvider.java:203)
at weblogic.servlet.provider.WlsSubjectHandle.run(WlsSubjectHandle.java:71)
at weblogic.servlet.internal.WebAppServletContext.doSecuredExecute(WebAppServletContext.java:2433)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2281)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2259)
at weblogic.servlet.internal.ServletRequestImpl.runInternal(ServletRequestImpl.java:1691)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1651)
at weblogic.servlet.provider.ContainerSupportProviderImpl$WlsRequestExecutor.run(ContainerSupportProviderImpl.java:270)
at weblogic.invocation.ComponentInvocationContextManager._runAs(ComponentInvocationContextManager.java:348)
at weblogic.invocation.ComponentInvocationContextManager.runAs(ComponentInvocationContextManager.java:333)
at weblogic.work.LivePartitionUtility.doRunWorkUnderContext(LivePartitionUtility.java:54)
at weblogic.work.PartitionUtility.runWorkUnderContext(PartitionUtility.java:41)
at weblogic.work.SelfTuningWorkManagerImpl.runWorkUnderContext(SelfTuningWorkManagerImpl.java:640)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:406)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:346)
Caused by: com.exception.RuleException
at com.ejb.ReportManagementBean.doLUMValidate(ReportManagementBean.java:92)
at com.ejb.ReportManagement_tq6u66_EOImpl.__WL_invoke(Unknown Source)
at weblogic.ejb.container.internal.SessionRemoteMethodInvoker.invokeInternal(SessionRemoteMethodInvoker.java:54)
at weblogic.ejb.container.internal.SessionRemoteMethodInvoker.invoke(SessionRemoteMethodInvoker.java:21)
... 55 more
Any guidance in this matter will be much appreciated.
This was fixed in a patch by Oracle on my request. The link for that patch is here Patch Link. You will need an Oracle Support log on to be able to access it.
This:
<enable-call-by-reference>true</enable-call-by-reference>
causes your remote calls in the same JVM to have local call semantics, including exception handling.