Scheduling a java code to run at a later time
Hi,
I am working on a part of a project where in when i make a request for a report
to be generated from a jsp, the java code that generates the report must be
scheduled to run in the night time e.g 12 AM. How do i go about doin this...??
Thanks
Message was edited by:
Naik1983
Try a scheduler. I could recommend Quartz: http://www.opensymphony.com/quartz/
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Working fine with JAVA code and Error Occured while using in JSP
Hi.....
When initiating a BPEL process from JAVA the code is working fine and the Process is getting initiated.But while using that code in J2EE project as a java code and while calling that method Error is occuring.....
Here by i am attaching my JAVA Code which runs as an applicateion and package which runs in Server....
JAVA Code (Run as Application) Working Fine:
package bo;
import com.oracle.bpel.client.Locator;
import com.oracle.bpel.client.NormalizedMessage;
import com.oracle.bpel.client.delivery.IDeliveryService;
import java.util.Map;
import java.util.Properties;
import oracle.xml.parser.v2.XMLElement;
/*import javax.servlet.RequestDispatcher;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest ;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession; */
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
public class processit {
public static void main(String args[]){
String input = "TATA";
String xmlInput= "<ns1:AccessDBBPELProcessRequest xmlns:ns1=\"http://xmlns.oracle.com/AccessDBBPEL\"><ns1:input>"+input+"</ns1:input></ns1:AccessDBBPELProcessRequest>";
String xml="<ns1:BPELProcess1ProcessRequest xmlns:ns1=\"http://xmlns.oracle.com/BPELProcess1\">";
xml=xml+"<ns1:input>"+input+"</ns1:input>";
xml=xml+"</ns1:BPELProcess1ProcessRequest>";
try{
Properties props=new Properties();
props.setProperty("orabpel.platform","ias_10g");
props.setProperty("java.naming.factory.initial","com.evermind.server.rmi.RMIInitialContextFactory");
props.setProperty("java.naming.provider.url","opmn:ormi://157.227.132.226:6003:home/orabpel");
props.setProperty("java.naming.security.principal","oc4jadmin");
props.setProperty("java.naming.security.credentials","oc4jadmin");
props.setProperty("dedicated.rmicontext", "true");
Locator locator = new Locator("default", "bpel", props);
System.out.println("After creating the locator object......");
IDeliveryService deliveryService =(IDeliveryService)locator.lookupService(IDeliveryService.SERVICE_NAME);
System.out.println("Before creating the NormalizedMessage object......");
NormalizedMessage nm = new NormalizedMessage();
System.out.println("After creating the NormalizedMessage object.*.*.*...");
nm.addPart("payload", xml);
System.out.println("Before creating response object......");
NormalizedMessage res = deliveryService.request("BPELProcess1", "process", nm);
System.out.println("After calling the BPELProcess1 .*.*.*...");
Map payload = res.getPayload();
System.out.println("BPEL called");
XMLElement xmlEl=(oracle.xml.parser.v2.XMLElement)payload.get("payload");
String replyText=xmlEl.getText();
System.out.println("Reply from BPEL Process>>>>>>>>>>>>> "+replyText);
catch (Exception e) {
System.out.println("Exception : "+e);
e.printStackTrace();
JSP and Java Method Used:
JSP Code:
===============
<%@ page import=" bo.callbpel" %>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>FEATT - I30</title>
</head>
<body>
<%
String input=request.getParameter("dnvalue");
callbpel p=new callbpel();
String Output=p.Initiate(input);
out.print("The Input Given to the BPEL Process is : "+input);
%>
<BR><BR><BR><BR><BR><BR>
<%
out.print("The Reply from BPEL Process is : "+Output);
%>
</body>
</html>
Java Code:
package bo;
import com.oracle.bpel.client.Locator;
import com.oracle.bpel.client.NormalizedMessage;
import com.oracle.bpel.client.delivery.IDeliveryService;
import java.util.Map;
import java.util.Properties;
import oracle.xml.parser.v2.XMLElement;
/*import javax.servlet.RequestDispatcher;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest ;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession; */
//import java.util.*;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
public class callbpel {
public String Initiate(String value){
String replyText=null;
String input = value;
System.out.println(input);
String xmlInput= "<ns1:AccessDBBPELProcessRequest xmlns:ns1=\"http://xmlns.oracle.com/AccessDBBPEL\"><ns1:input>"+input+"</ns1:input></ns1:AccessDBBPELProcessRequest>";
String xml="<ns1:BPELProcess1ProcessRequest xmlns:ns1=\"http://xmlns.oracle.com/BPELProcess1\">";
xml=xml+"<ns1:input>"+input+"</ns1:input>";
xml=xml+"</ns1:BPELProcess1ProcessRequest>";
try{
Properties props=new Properties();
props.setProperty("orabpel.platform","ias_10g");
props.setProperty("java.naming.factory.initial","com.evermind.server.rmi.RMIInitialContextFactory");
props.setProperty("java.naming.provider.url","opmn:ormi://157.227.132.226:6003:home/orabpel");
props.setProperty("java.naming.security.principal","oc4jadmin");
props.setProperty("java.naming.security.credentials","oc4jadmin");
props.setProperty("dedicated.rmicontext", "true");
Locator locator = new Locator("default", "bpel", props);
String uniqueBpelId = com.collaxa.cube.util.GUIDGenerator.generateGUID();
//System.out.println(uniqueBpelId);
//java.util.Map msgProps = new HashMap();
System.out.println("After creating the locator object......");
IDeliveryService deliveryService =(IDeliveryService)locator.lookupService(IDeliveryService.SERVICE_NAME);
System.out.println("Before creating the NormalizedMessage object......");
NormalizedMessage nm = new NormalizedMessage();
System.out.println("After creating the NormalizedMessage object.*.*.*...");
//msgProps.put("conversationId",uniqueBpelId);
//nm.setProperty("conversationId",uniqueBpelId);
nm.addPart("payload", xml);
System.out.println("Before creating response object......");
NormalizedMessage res = deliveryService.request("BPELProcess1", "process", nm);
System.out.println("After calling the BPELProcess1 .*.*.*...");
Map payload = res.getPayload();
System.out.println("BPEL called");
XMLElement xmlEl=(oracle.xml.parser.v2.XMLElement)payload.get("payload");
replyText=xmlEl.getText();
System.out.println("Reply from BPEL Process>>>>>>>>>>>>> "+replyText);
catch (Exception e) {
System.out.println("Exception : "+e);
e.printStackTrace();
return replyText;
While Creating and Object for the Class callbpel and Whilw Calling that Method
callbpel p=new callbpel();
String Output=p.Initiate(input);
Its throwing an Error:
Error Occured is:
After creating the locator object......
Before creating the NormalizedMessage object......
After creating the NormalizedMessage object.*.*.*...
Before creating response object......
Apr 24, 2008 9:12:00 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.NoClassDefFoundError: javax/ejb/EJBException
at com.oracle.bpel.client.util.ExceptionUtils.handleServerException(ExceptionUtils.java:76)
at com.oracle.bpel.client.delivery.DeliveryService.getDeliveryBean(DeliveryService.java:254)
at com.oracle.bpel.client.delivery.DeliveryService.request(DeliveryService.java:83)
at com.oracle.bpel.client.delivery.DeliveryService.request(DeliveryService.java:53)
at bo.callbpel.Initiate(callbpel.java:55)
at org.apache.jsp.output_jsp._jspService(output_jsp.java:55)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Unknown Source)
For Running JSP i am Using Eclipse 3.2.0 and apache-tomcat-5.5.25
Please Provide me a Solution......
Thanks in Advance.....
Regards,
Suresh KA JSP is not the same as a Java application. A Java application has package statment, import statements, try/catch block, a JSP doesn't.
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JNI Calling Java code when attaching to existing JVM
I've got an Active/X that runs within IE, and also makes JNI calls (via the Invocation API) to Java code. Running within IE means there's already a JVM around, so I attach to it using JNI_GetCreatedJavaVMs
This is fine. The problem is that I can't use the JNI findClass() to locate my Java classes, because I have no control over the classpath that the JVM is using to locate classes. The only solution I can think of so far is to either add my classes as part of the JVM, OR find out the classpath of the existing JVM (using System.getProperty("java.class.path") and copy my classes into that directory.
Both solutions look ugly - anyone know of a cleaner way ?
Mark.Toby, thanks for the reply.
You're welcome.
I notice from elsewhere on this forum, you're clearly a JNI expert.
I've been known to work with it a little from time to time. =)
My code has to work with JDK 1.1 so URLClassLoader is out. Writing my own classloader is fine, but how do I load it in the first place ? Is there something in JNI I've missed ?
Possibly. Using DefineClass() you can load a class into the virtual machine, given it's byte-code. Now here's the tricky part. First, write your ClassLoader. It will be easiest if it doesn't rely on any other classes other than what is core to the JRE. Once you compile that classloader, you then need to include the bytecode as a resource in your executable/dll. Then, at runtime, you can load that resource, and use DefineClass to class-load it. Once you've class-loaded it, you can use NewObject, GetMethodID, CallXXXMethod, etc... to do the other class loading you need to do.
Trust me, this really isn't as hard as it might sound.
God bless,
-Toby Reyelts
As always, I recommend you check out the free, open-source JNI toolkit, Jace, at http://jace.reyelts.com/jace.
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