Lock method in Java

Hi,
Is there any "lock" operation in Java that will allow me to syncronize the access to a shared object.

Look at the synchronized key word and its use on methods and as a stand-alone clause.
For example, the following bit of code prevents multiple threads from entering the synchronized block   synchronized (someObjectThatIsTheLock) {
      // do something in here where only 1 thread can get in
   }

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Http LOCK method using ms-word

Hi all,
I'm trying to open a .doc file via MS-word that will be downloaded from my server.
I provide word with a url that maps to a servlet that should serve the file from a DB, and write it back to the client (MS-word).
The thing is that word sends to my server a request with "LOCK" method, which obviously is specific to microsoft and not a standard. I played around with it for a while and didn't get to any reasonable solution. I also tried googling around a bit for microsoft specifications or something (god I hate microsofts documentation, somehow I never understand anything from it) to see what kind of a response would be appropriate for that "LOCK" request, but found nothing usefull enough.....
I know this has nothing to do with java or servlets but I thought maybe one of you encountered this situation and has something usefull to tell me.....
thanks.

Oh yes, of course....
thats what happened first, when I simply didn't know word is going to send "LOCK" and not a simple "GET"... so what happened was that the response returned by the servlet was some kind of "bad request" status code, since the service method doesn't know the "LOCK" method. I don't remember what exactly status code that is, but word didn't like it and as a consequence tried some other http request that came up with no results.
What I did later on was to override the service method and return a specific status code (SC_BAD_REQUEST if I remember correctly) for that LOCK request. that response actualy got word to launch another nice "GET" http request that did serve up the file, the problem is it "hangs" on the lock response for about 10 seconds for some reason and sometimes doesn't work at all (couldn't quite figure out when exactly).
I looked around a bit more and this actualy is a WebDAV standard documented in a couple of RFCs. I need some kind of way to inform the client I don't support lock, I thought what I did was on that track, but as I've written, word doesn't like it....

How to call the java method in java script function in a portal application

Hi Friends,
I am developing one application where i need to fetch the data from KM content and displaying it on the screen in regular interval. I wrote one method in JSPdynpage for fetching data from KM content now I need to call that java method in java script function.
java method(IComponentRequest request)
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function()
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setTimeout(function, 5000);//setting the time interval for this function
<<htmlb display code>>
If anybody can help me in calling the java method in java script function that will be very helpful for me.
Thanks in advance,
Sandeep Bonam

Hi,
Pls see if the following links could help.
http://www.rgagnon.com/javadetails/java-0170.html
http://www-128.ibm.com/developerworks/library/wa-resc/?dwzone=web
Regards

Error(23,19): method getName(java.lang.String) not found in class javax.swi

Hi , when i try to run my program, i keep getting the error msg:
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I have checked the java API and it inherits from the awt.Component class and should be accessible via the jtextfield.
I have tried the following:
trying to initailise the JTextField at the start.
Using getName works if i use it within the loop after setting the name.
Does anybody know what i am doing wrong please?
public class clsMember extends JPanel implements ActionListener {
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this.add(l);
//if the array item is salutation create a combobox
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jcomSalutation = new JComboBox(strSalutation);
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this.add(txtItem);
//code omitted

If i have a loop that creates the jtextfields such as
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this.add(txtItem);How is it then possible to assign to a string the value of a *specific jtextfield*. Lets say that one of these JTextfields has the name surname.
How is it possible for me to writeString surname = surnamejtextfield.getText();

Accesing database from static method on java collaboration

Hi *,
I want cache data from a oracle database in a java collaboratioon when java collaboration is enabled by emanager.
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Thanks
Hector

hi hector,
this wont work!
regards chris

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Please suggest solutions.
Thanks
nsgindia

Your JDBC driver doesn't support batch operation, try another driver(not all databases support batch'es eg MySQL)

How to deprecate my own method in java

How to deprecate my own method in java, so that my compiler gives a warning when i use a deprecated method?

Mark it as deprecated as specified in the javadoc guide, (available on this site). You deserve an RTFM but I'm feeling nice today ;->

How I build my own libraries of classes/methods in java ?

How I build my own libraries of classes/methods in java ? how then I refer a functionX() (i mean method) in LibraryX ? can you give a short/brief example of a library with a class with a method and a main method of normal class calling this method (of external's added library's) ?

Just another cross poster.
[http://www.java-forums.org/new-java/12389-how-i-build-my-own-libraries-classes-methods-java.html]
db
edit And [http://forums.java.net/jive/thread.jspa?messageID=305387]
Edited by: Darryl.Burke

How to create search function (af:query) using method in java

hi All..:)
i got problem with search custom (af:query), how to create search function/ af:query using method in java class?
anyone help me....
thx
agungdmt

Hi,
download the ADF Faces component demo sources from here: http://www.oracle.com/technetwork/testcontent/adf-faces-rc-demo-083799.html It also has an example for creating a custom af:query model
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Can we call DLL method in jave code

hi,
can we call DLL file method in java Code or program.

See
http://forum.java.sun.com/thread.jsp?forum=52&thread=179765

How to Call C++ Method from Java

I need to call C++ method from Java.
I have gone through the JNI tuorial , but was not able to pin point things.
I read that :
You have to write JNI c functions which then call your C++ member functions.You need to write a JNI function which will call new on your C++ class.
Now i have java class :
Java Code JavaClass.java ---->
class JavaClass{
public native void nativeMethod();
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}Cpp Code:
NativeCppCode.h---->
class NativeCppCode
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private:
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NativeCppCode::getValue()
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JNIEXPORT void JNICALL Java_JavaClass_nativeMethod(JNIEnv *env
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NativeCppCode* nativeInstabce = new NativeCppCode();
NativeCppCode.setValue();
}Is this the correct way to do it.
Any suggestion would be a great help to me

tryit wrote:
I need to call C++ method from Java.Not possible.
JNI uses C methods.
Is this the correct way to do it.Same way you would do it in any C/C++ method (not java)
       MyClass* p = ....
       p->doit();
Common idiom for the pointer in the above is to pass it back and forth to your java code as a java long. You cast it it and from your class pointer. Provide an explicit java method to free it when done. Besides providing the explicit method also implement a finalizer to free it as well (however that is a fail safe and should not be relied upon.)

Puzzled by the redefinition of the methods in java.util.Set

Hi all,
I don't understand why those methods in java.util.Set redefined since their counterparts have alrealdy been defined in java.util.Collection and java.util.Set extends java.util.Collection. I agree to redefine boolean add(Object o) because its contract has been modified, but what about the rest like
size() and iterator() ?
Thanks.

Hi all,
I don't understand why those methods in
in java.util.Set redefined since their counterparts
have alrealdy been defined in java.util.Collection
and java.util.Set extends java.util.Collection. I
agree to redefine boolean add(Object o) because its
contract has been modified, but what about the rest
like
size() and iterator() ?Completeness's sake?
~Cheers

Error(400,8): method include(java.lang.String, boolean) not found in class

I have uploaded my Application which was running fine in other IDE to jdev 10.1.3, when i compile the follwing error error in jsp page.
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My jsp code where error is shown is
<jsp:include page="querySections/generation.jsp" flush="true">
                                        <jsp:param name="TSN" value="<%=strParamValue[1]%>"/>
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pl help me in solving this its urgent...
Thanks & Regards
Lakshmi

Hi,
code snippet looks okay and is identical with what JDeveloper generates.
Frank

Are static methods in Java thread safe?

Are static methods in Java thread safe?
thanks,
suresh

if static method use the instance variable
You mean member variable, where member variables are either class variables (static) or instance variables (non-static).
then you have to make it thread safe using
synchronization Not necessarily. Depends on requirements and usage context.
else in case of local var. it
is thread safe. Not necessarily. That local variable could refer to an object that's visible to multiple threads.
Statements like "Local variables are threadsafe but member variables aren't" are an oversimplification.
Something is threadsafe if it cannot be made to behave incorrectly simply by running it in a multithreaded context. Determining that can be very difficult.

Method invokeMethod(java.lang.String, org.w3c.dom.Element) not found

I am calling a Web Service that returns an XML-file. The XML-file should be passed to a method that puts the xml into a table in my database.
I will upload the 3 files that are being used for this.
When I rebuild my files I get the following error in CustomerCO.java:
Error(78,38): method invokeMethod(java.lang.String, org.w3c.dom.Element) not found in interface oracle.apps.fnd.framework.OAApplicationModule
Line 78 reads as follows:
String Status = (String)am.invokeMethod("initSaveXml", wsXml);
Any suggestions?
PS: I am a newbie to java and framework :-(
Here are my files:
CustomerCO.java:
/*===========================================================================+
| Copyright (c) 2001, 2005 Oracle Corporation, Redwood Shores, CA, USA |
| All rights reserved. |
+===========================================================================+
| HISTORY |
+===========================================================================*/
package xxcu.oracle.apps.ar.customer.server.webui;
import java.io.Serializable;
import java.lang.Exception;
import oracle.apps.fnd.common.VersionInfo;
import oracle.apps.fnd.framework.OAApplicationModule;
import oracle.apps.fnd.framework.webui.OAControllerImpl;
import oracle.apps.fnd.framework.webui.OAPageContext;
import oracle.apps.fnd.framework.webui.beans.OAWebBean;
import org.w3c.dom.Element;
import xxcu.oracle.apps.ar.customer.ws.LindorffWS;
* Controller for ...
public class CustomerCO extends OAControllerImpl implements Serializable
public static final String RCS_ID="$Header$";
public static final boolean RCS_ID_RECORDED =
VersionInfo.recordClassVersion(RCS_ID, "%packagename%");
* Layout and page setup logic for a region.
* @param pageContext the current OA page context
* @param webBean the web bean corresponding to the region
public void processRequest(OAPageContext pageContext, OAWebBean webBean)
super.processRequest(pageContext, webBean);
* Procedure to handle form submissions for form elements in
* a region.
* @param pageContext the current OA page context
* @param webBean the web bean corresponding to the region
public void processFormRequest(OAPageContext pageContext, OAWebBean webBean)
super.processFormRequest(pageContext, webBean);
* 2009.07.09, Roy Feirud, lagt til for å utføre spørring
if (pageContext.getParameter("Search") != null)
OAApplicationModule am = pageContext.getApplicationModule(webBean);
//Setter søkekriteriene til LindorffWS
String Name = pageContext.getParameter("SearchName");
String Address = pageContext.getParameter("SearchAddress");
String Zip = pageContext.getParameter("SearchZipCode");
String City = pageContext.getParameter("SearchCity");
String Born = pageContext.getParameter("SearchBorn");
String Phone = pageContext.getParameter("SearchPhoneNo");
Serializable[] param = { Name, Address, Zip, City, Born, Phone };
//Bygger søkestrengen
String SearchString = (String)am.invokeMethod("initBuildString", param );
//Initialiserer LindorffWS
LindorffWS WsConnection = new LindorffWS();
try
//Kaller Web Sevice fra Lindorff
Element wsXml = (Element)WsConnection.XmlFulltextOperator(SearchString);
String Status = (String)am.invokeMethod("initSaveXml", wsXml);
catch(Exception WsExp)
// WsConnection = new LindorffWS();
System.out.println("Kall til LindorffWS feilet!");
am.invokeMethod("initQueryCustomer");
CustomerAMImpl.java:
package xxcu.oracle.apps.ar.customer.server;
import java.io.Serializable;
import java.sql.CallableStatement;
import java.sql.SQLException;
import java.sql.Types;
import oracle.apps.fnd.common.MessageToken;
import oracle.apps.fnd.framework.OAException;
import oracle.apps.fnd.framework.server.OAApplicationModuleImpl;
import oracle.apps.fnd.framework.server.OADBTransaction;
import oracle.apps.fnd.framework.server.OAExceptionUtils;
import org.w3c.dom.Element;
// --- File generated by Oracle Business Components for Java.
public class CustomerAMImpl extends OAApplicationModuleImpl implements Serializable
* This is the default constructor (do not remove)
public CustomerAMImpl()
* Sample main for debugging Business Components code using the tester.
public static void main(String[] args)
launchTester("xxcu.oracle.apps.ar.customer.server", "CustomerAMLocal");
* Container's getter for CustomerVO1
public CustomerVOImpl getCustomerVO1()
return (CustomerVOImpl)findViewObject("CustomerVO1");
* 2009.07.09, Roy Feirud, Lagt til for å utføre spørring.
public void initQueryCustomer()
CustomerVOImpl vo = getCustomerVO1();
if (vo!=null)
vo.initQuery();
* 2009.08.31, Roy Feirud, Lagt til for å bygge opp input til WebService hos Lindorff.
public String initBuildString(String Name
,String Address
,String Zip
,String City
,String Born
,String Phone)
String ws_string = null;
CallableStatement cs = null;
try
String sql= "BEGIN ISS_WS_LINDORFF_PKG.BUILD_STRING (?,?,?,?,?,?,?); END;";
OADBTransaction txn = getOADBTransaction();
cs = txn.createCallableStatement(sql,1);
cs.setString(1,Name);
cs.setString(2,Address);
cs.setString(3,Zip);
cs.setString(4,City);
cs.setString(5,Born);
cs.setString(6,Phone);
cs.registerOutParameter(7,Types.VARCHAR);
cs.execute();
OAExceptionUtils.checkErrors (txn);
ws_string = cs.getString(7);
cs.close();
catch (SQLException sqle)
String Prosedyre = "ISS_WS_LINDORFF_PKG.BUILD_STRING";
String Errmsg = sqle.toString();
MessageToken[] tokens = {new MessageToken("PROSEDYRE", Prosedyre), new MessageToken("ERRMSG", Errmsg)};
throw new OAException("ISS", "ISS_PLSQL_ERROR",tokens,OAException.ERROR, null);
return ws_string;
public String initSaveXml(Element WsXml)
String Status = "Error";
CallableStatement cs = null;
try
String sql= "BEGIN ISS_XML2TABLE_PKG.ISS_AR_CUSTOMERS_TMP (?,?); END;";
OADBTransaction txn = getOADBTransaction();
cs = txn.createCallableStatement(sql,1);
cs.setObject(1,WsXml);
cs.registerOutParameter(2,Types.VARCHAR);
cs.execute();
OAExceptionUtils.checkErrors (txn);
Status = cs.getString(2);
cs.close();
catch (SQLException sqle)
String Prosedyre = "ISS_XML2TABLE_PKG.ISS_AR_CUSTOMERS_TMP";
String Errmsg = sqle.toString();
MessageToken[] tokens = {new MessageToken("PROSEDYRE", Prosedyre), new MessageToken("ERRMSG", Errmsg)};
throw new OAException("ISS", "ISS_PLSQL_ERROR",tokens,OAException.ERROR, null);
return Status;
LindorffWS.java:
package xxcu.oracle.apps.ar.customer.ws;
import oracle.soap.transport.http.OracleSOAPHTTPConnection;
//import org.apache.soap.encoding.soapenc.BeanSerializer;
import org.apache.soap.encoding.SOAPMappingRegistry;
//import org.apache.soap.util.xml.QName;
import java.util.Vector;
import org.w3c.dom.Element;
import java.net.URL;
import org.apache.soap.Body;
import org.apache.soap.Envelope;
import org.apache.soap.messaging.Message;
import oracle.jdeveloper.webservices.runtime.WrappedDocLiteralStub;
* Generated by the Oracle9i JDeveloper Web Services Stub/Skeleton Generator.
* Date Created: Fri Jul 10 10:37:21 CEST 2009
* WSDL URL: http://services.lindorffmatch.com/Search/Search.asmx?WSDL
public class LindorffWS extends WrappedDocLiteralStub
public LindorffWS()
m_httpConnection = new OracleSOAPHTTPConnection();
public String endpoint = "http://services.lindorffmatch.com/Search/Search.asmx";
private OracleSOAPHTTPConnection m_httpConnection = null;
private SOAPMappingRegistry m_smr = null;
public Element XmlFulltextOperator(String xmlString) throws Exception
URL endpointURL = new URL(endpoint);
Envelope requestEnv = new Envelope();
Body requestBody = new Body();
Vector requestBodyEntries = new Vector();
String wrappingName = "XmlFulltextOperator";
String targetNamespace = "http://services.lindorffmatch.com/search";
Vector requestData = new Vector();
requestData.add(new Object[] {"xmlString", xmlString});
requestBodyEntries.addElement(toElement(wrappingName, targetNamespace, requestData));
requestBody.setBodyEntries(requestBodyEntries);
requestEnv.setBody(requestBody);
Message msg = new Message();
msg.setSOAPTransport(m_httpConnection);
msg.send(endpointURL, "http://services.lindorffmatch.com/search/XmlFulltextOperator", requestEnv);
Envelope responseEnv = msg.receiveEnvelope();
Body responseBody = responseEnv.getBody();
Vector responseData = responseBody.getBodyEntries();
return (Element)fromElement((Element)responseData.elementAt(0), org.w3c.dom.Element.class);
_______________________________________________________________________________________________________________________________

Hi,
Create an Interface to your application Module then from interface call your method,
refer http://www.oraclearea51.com/oracle-technical-articles/oa-framework/oa-framework-beginners-guide/213-how-to-call-am-methods-from-controller-without-using-invokemethod.html for creating Interface for AM and calling it in controller.
Regards,
Reetesh Sharma

Lock method in Java

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