how to create Spring component for SpringContextProcessor with Nifi - spring-integration

Question

I was trying to follow Oleg's demo in here: https://www.youtube.com/watch?v=F98NLule18I&t=1909s
And I pulled his si-demo from https://github.com/olegz/si-demo
But in Nifi 1.6.0, when SpringContextProcessor is configed with si-demo classpath and toNifiOnly.xml the processor yanks InvocationTargetException, and processor won't be properly initialized!
Are there any other demos or examples for creating a spring component for Nifi? Or how to fix this?
Here is the error message in log file:
2018-06-02 09:26:28,040 ERROR [Monitor Processore Lifecycle Thread-2] o.a.nifi.spring.SpringContextProcessor SpringContextProcessor[id=bc3dbcab-0163-1000-4b77-af4eab0c7c46] Failed to properly initialize Processor. If still scheduled to run, NiFi will attempt to initialize and run the Processor again after the 'Administrative Yield Duration' has elapsed. Failure is due to java.lang.reflect.InvocationTargetException: java.lang.reflect.InvocationTargetException
java.lang.reflect.InvocationTargetException: null
at sun.reflect.GeneratedMethodAccessor374.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.nifi.util.ReflectionUtils.invokeMethodsWithAnnotations(ReflectionUtils.java:137)
at org.apache.nifi.util.ReflectionUtils.invokeMethodsWithAnnotations(ReflectionUtils.java:125)
at org.apache.nifi.util.ReflectionUtils.invokeMethodsWithAnnotations(ReflectionUtils.java:70)
at org.apache.nifi.util.ReflectionUtils.invokeMethodsWithAnnotation(ReflectionUtils.java:47)
at org.apache.nifi.controller.StandardProcessorNode.lambda$initiateStart$3(StandardProcessorNode.java:1455)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
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)
Caused by: java.lang.IllegalStateException: Failed while initializing Spring Application Context
at org.apache.nifi.spring.SpringContextProcessor.initializeSpringContext(SpringContextProcessor.java:239)
... 14 common frames omitted
Caused by: java.lang.IllegalStateException: Failed to instantiate Spring Application Context. Config path: 'fromNifiOnly.xml'; Classpath: [[file:/Users/shuo/Projects/sts-workspace/si-demo/target/deps/slf4j-api-1.6.6.jar, file:/Users/shuo/Projects/sts-workspace/si-demo/target/deps/commons-logging-1.2.jar, file:/Users/shuo/Projects/sts-workspace/si-demo/target/deps/camel-spring-2.16.2.jar, file:/Users/shuo/Projects/sts-workspace/si-demo/target/deps/aopalliance-1.0.jar, file:/Users/shuo/Projects/sts-workspace/si-demo/target/deps/spring-tx-4.2.4.RELEASE.jar, file:/Users/shuo/Projects/sts-workspace/si-demo/target/deps/camel-core-2.16.2.jar, file:/Users/shuo/Projects/sts-workspace/si-demo/target/deps/spring-beans-4.2.4.RELEASE.jar, file:/Users/shuo/Projects/sts-workspace/si-demo/target/deps/spring-core-4.2.4.RELEASE.jar, file:/Users/shuo/Projects/sts-workspace/si-demo/target/deps/jaxb-core-2.2.11.jar, file:/Users/shuo/Projects/sts-workspace/si-demo/target/deps/spring-retry-1.1.2.RELEASE.jar, file:/Users/shuo/Projects/sts-workspace/si-demo/target/deps/si-demo-0.0.1-SNAPSHOT.jar, file:/Users/shuo/Projects/sts-workspace/si-demo/target/deps/spring-aop-4.2.4.RELEASE.jar, file:/Users/shuo/Projects/sts-workspace/si-demo/target/deps/spring-integration-core-4.2.4.RELEASE.jar, file:/Users/shuo/Projects/sts-workspace/si-demo/target/deps/jaxb-impl-2.2.11.jar, file:/Users/shuo/Projects/sts-workspace/si-demo/target/deps/spring-expression-4.2.4.RELEASE.jar, file:/Users/shuo/Projects/sts-workspace/si-demo/target/deps/spring-messaging-4.2.4.RELEASE.jar, file:/Users/shuo/Projects/sts-workspace/si-demo/target/deps/spring-context-4.2.4.RELEASE.jar, file:/Users/shuo/Projects/sts-workspace/si-demo/target/deps/]]
at org.apache.nifi.spring.SpringContextFactory.createSpringContextDelegate(SpringContextFactory.java:92)
at org.apache.nifi.spring.SpringContextProcessor.initializeSpringContext(SpringContextProcessor.java:236)
... 14 common frames omitted
Caused by: java.lang.reflect.InvocationTargetException: null
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.apache.nifi.spring.SpringContextFactory.createSpringContextDelegate(SpringContextFactory.java:80)
... 15 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/context/support/ClassPathXmlApplicationContext
at org.apache.nifi.spring.bootstrap.SpringContextDelegate.<init>(SpringContextDelegate.java:72)
... 20 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.context.support.ClassPathXmlApplicationContext
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 21 common frames omitted

Answer 1

I have found out later that it is necessary to copy all the xml files to the deps folder to let it run!