Custom Function giving compile error

Question

Hi All,
I have created a custom function to get the current time stamp. Below is the java code:
package com.oracle.determinations.examples;
import com.oracle.determinations.engine.CustomFunction;
import com.oracle.determinations.engine.EntityInstance;
import java.util.*;
import java.text.*;
public class CurrentTimeStamp extends CustomFunction {
   public Object evaluate(EntityInstance entityInstance, Object[] objects) {
      Date dNow = new Date( );
      SimpleDateFormat ft =
      new SimpleDateFormat ("MM/dd/yyyy HH:mm:ss");
    /*System.out.println(ft.format(dNow));*/
      return ft.format(dNow);
My Extension.xml is as below:
<?xml version="1.0" encoding="utf-8"?>
<extension>
  <functions>
    <function name="CurrentTimeStamp" return-type="text">
  <arg name="entered-name" type="text"/>
       <handler platform="java" class="com.oracle.determinations.examples.CurrentTimeStamp"/>
      </function>
  </functions>
</extension>
The extension.xml is placed under following path:
Development/Extension/CurrentTimeStamp/extension.xml
The JAR file is palced under following path:
Development/Extension/CurrentTimeStamp/lib/CurrentTimeStamp.jar (the jar file includes the com.oracle.determination.example folder structure)
When i am using CurrentTimeStamp() in the rule base, it is throwing compile error saying:
Error after text CurrentTimeStamp(' Fount Text: ')'. Exptected value variable or constant OPA - E00111
Can you please help me where i am getting wrong and why it is not identifying the function?
Thanks,
KK

Answer 1

Hi,
I tried using the function with blank arguments like:CurrentTimeStamp("") and it was compiled successfully. When I tried running this rulebase in the tomcat server (web determinations).. i got the below error; Can someone please let me know what is happening here:
HTTP Status 500 - Servlet.init() for servlet WebDeterminationsServlet threw exception
type Exception report
message Servlet.init() for servlet WebDeterminationsServlet threw exception
description The server encountered an internal error that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: Servlet.init() for servlet WebDeterminationsServlet threw exception org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1008) org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310) java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source)
root cause
java.lang.UnsupportedClassVersionError: Unsupported major.minor version 51.0 java.lang.ClassLoader.defineClass1(Native Method) java.lang.ClassLoader.defineClassCond(Unknown Source) java.lang.ClassLoader.defineClass(Unknown Source) java.lang.ClassLoader.defineClass(Unknown Source) com.oracle.determinations.engine.local.CustomResourceClassLoader.findClass(CustomResourceClassLoader.java:120) java.lang.ClassLoader.loadClass(Unknown Source) java.lang.ClassLoader.loadClass(Unknown Source) java.lang.Class.forName0(Native Method) java.lang.Class.forName(Unknown Source) com.oracle.determinations.util.PlatformClassLoader.newInstance(PlatformClassLoader.java:61) com.oracle.determinations.engine.local.RulebaseLoader.loadCustomFunctions(RulebaseLoader.java:267) com.oracle.determinations.engine.local.RulebaseLoader.loadRulebase(RulebaseLoader.java:178) com.oracle.determinations.interview.engine.InterviewRulebase.<init>(InterviewRulebase.java:137) com.oracle.determinations.interview.engine.local.LocalRulebaseService.applyChangeSet(LocalRulebaseService.java:250) com.oracle.determinations.interview.engine.plugins.rulebaseresolver.ClassloaderRulebaseResolverPlugin.initialise(ClassloaderRulebaseResolverPlugin.java:73) com.oracle.determinations.interview.engine.local.LocalRulebaseService.<init>(LocalRulebaseService.java:53) com.oracle.determinations.interview.engine.local.LocalInterviewEngine.initialise(LocalInterviewEngine.java:181) com.oracle.determinations.interview.engine.local.LocalInterviewEngine.<init>(LocalInterviewEngine.java:66) com.oracle.determinations.interview.engine.InterviewEngineFactory.createInstance(InterviewEngineFactory.java:19) com.oracle.determinations.web.platform.servlet.WebDeterminationsServletContext.init(WebDeterminationsServletContext.java:180) com.oracle.determinations.web.platform.servlet.WebDeterminationsServletContext.<init>(WebDeterminationsServletContext.java:116) com.oracle.determinations.web.platform.servlet.WebDeterminationsServlet.init(WebDeterminationsServlet.java:73) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1008) org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310) java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.40 logs.