MIME encode a jar file

Hello to all,
I want to place a jar file into the XML for transmission over network. I know that i need to encode the jar file for placing it into the XML since jar file is a binary data. Does any one have any idea idea how to MIME encode a jar file and then put the encoded jar file into an XML for transmission.
Thanks & Regards,
Girish

Look down a few posts to the MediaTracker question. Basically you should use the getResource method to grab a URL to a file in your jar file. Then you can pass the URL to whatever method you're calling like getImage().
URL myURL = MyClass.class.getResource("myfile.gif");

Similar Messages

XML file with an attached MIME encoded ZIP file

Hi all,
I'm new to SAP WAS and MIME encoding/decoding, and I'm trying to generate an XML file with an attachment which is also MIME encoded.
1) I have dummy files (1.jpg, 2.jpg) and I'm trying to zip these files into one zip file (files.zip).
2) I'm trying to MIME encode/decode this zip file.
3) I'm trying to attach this MIME encoded zip file to existing XML file.
Which FMs could I use to accomplish this? Your help is very appreciated.
Thank you.
below is a file example that I'm trying to generate.
MIME-Version: 1.0
Content-Type: multipart/mixed;
     boundary="--XXXXboundary text"
Content-Transfer-Encoding: 7bit
This is a multi-part message in MIME format.
--XXXXboundary text
Content-Type: text/xml;
     charset="utf-8"
Content-Transfer-Encoding: 8bit
<?xml version="1.0" encoding="utf-8"?>
<abc/>
<def/>
--XXXXboundary text
Content-Type: application/octet-stream;      name="files.zip"
Content-Transfer-Encoding: base64
Content-Disposition: attachment
UEsDBBQAAAAIAI9EejAs5k34H84DAAYgBAAMAAAAMDAyMjQ5MTEucGRmnLsJWBNJ2zb6jmJIIIFE
BAMIJGEVBSKGRRAhEGQNoGwKYoiAEnYRUFGIkBAQFzYXRNHAAEGQZRy2ATFDUAHfGScSIUwQMMrM
ECGADptA0n/jzLtc//dd51znVAKdru6uqn7q6fu5764qQz

Just create an applet (extend JApplet)... add a JTextArea to it....fill the text area with the text from an XML doc.
To get the text of the XML doc just do something like..
File xmlFile = new File("<path to xml file>");
FileInputStream fis = new FileInputStream(xmlFile);
byte[] bytes = new byte[(int) xmlFile.length()];
fis.read(bytes);
fis.close();
String xmlText = new String(xmlBytes);
textArea.setText(xmlText);
...try something like that (assuming..i understand what it is u want)

Incremental update jar files

Hi,
I want to update a jar file but everything I do ends in
"Missing version field in response from server when accessing resource".
Do I need a version.xml? If I need this how should it looks like? Could someone write an example for that mission?
Regards,
Patrick
Thats my project:
/myapp/myapp.html
/myapp/myapplication.jar
/myapp/myapplication.jnlp
/myapp/myapplication.jpg
/myapp/meta-inf/Manifest.mf
/myapp/web-inf/web.xml
/myapp/web-inf/lib/jaxp.jar
/myapp/web-inf/lib/jnlp-servlet.jar
/myapp/web-inf/lib/parser.jar
web.xml:
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
"http://java.sun.com/j2ee/dtds/web-app_2.2.dtd">
<web-app>
     <servlet>
               <servlet-name>JnlpDownloadServlet</servlet-name>
               <servlet-class>com.sun.javaws.servlet.JnlpDownloadServlet</servlet-class>
          <init-param>
               <param-name>loglevel</param-name>
               <param-value>DEBUG</param-value>
          </init-param>
          <init-param>
               <param-name>logPath</param-name>
               <param-value>/logs/jnlpdownloadservlet.log</param-value>
          </init-param>
          <mime-mapping>
               <extension>
                    jnlp
               </extension>
               <mime-type>
                    application/x-java-jnlp-file
               </mime-type>
          </mime-mapping>
          <mime-mapping>
               <extension>
                    jardiff
               </extension>
               <mime-type>
                    application/x-java-archive-diff
               </mime-type>
          </mime-mapping>
     </servlet>
</web-app>
jnlp:
<jnlp spec="1.0+" codebase="http://asgard/myapp" href="myapplication.jnlp" version="2.0">
<information>
<title>MyApplication</title>
<vendor>Patrick Scholze</vendor>
<homepage href="../myapp.html" />
<description kind="">MyApplication</description>
<description kind="short">myapp</description>
<icon kind="default" href="myapplication.jpg" />
</information>
<resources>
<j2se version="1.2+" />
<jar href="myapplication.jar" main="true" download="eager" version="2.0"/>
</resources>
<application-desc main-class="Start">
</application-desc>
<security>
<all-permissions />
</security>
</jnlp>

Now there are no error messages but JWS downloads the
complete jar file.If you specify "eager", Web Start is told to load that jar immeadiately.
What exactly do you have in mind with that jar?
Lazy download (thus at a latter time), or the download of a specific version of the jar or differential download?
Regards,
Marc

How to authenticate a JWS Client download of jar files on a web server

Here is a history of how i tried to implement the auth system:
The resources(jar files) cannot be downloaded by any HTTP client from the server without some authentication method.
As JWS is not reliable when using cookies (only 1.5 supports them, but with problems when in JNLP file i specify j2se version=older that 1.5) , i implemented another mecanism that works like this:
1. 1.The template JNLP looks like this
<?xml version="1.0" encoding="utf-8"?>
<jnlp codebase="http://10.3.0.62/" href="mapped/#JWS_CODE#___#PLATFORM#___app2.2.jnlp">
    <information>
       bla bla
    </information>
    <security>
        <all-permissions/>
    </security>
    <resources>
        <j2se version="1.4"/>
        <jar href="http://10.3.0.62/mapped/gui.jar?jwsid=#JWS_CODE#" version="2.2"/>
        <jar href="http://10.3.0.62/mapped/data.jar?jwsid=#JWS_CODE#" version="2.2"/>
        <jar href="http://10.3.0.62/mapped/log4j.jar?jwsid=#JWS_CODE#"/>
    </resources>
    <application-desc main-class="com.bet.blues.gui.Application">
        <argument>-host</argument>
        <argument>ursus</argument>
        <argument>-port</argument>
        <argument>17771</argument>
    </application-desc>
</jnlp>2. All resources found in /mapped/ directory are mapped to JWSServlet
3. The users login to a site , clik on link , /mapped/app2.2.jnlp , the servlet checks if the session is active , gets the PLATFORM form browser request header , gets the JWSCODE for the logged user, replaces this in the template, and returns it to the client
4.Now after the 1st download the JNLP file is opened by JWS Client , that checks for latest version , requesting the JNLP file again
like this:
GET http://10.3.0.62/mapped/f12ks21092___windows___app2.2.jnlp5.Now the servlet sees the the request has a JNLP file name with an ID and PLATFORM, and serves the JNLP as before
6.The JWS Client will request for JAR Files
GET http://10.3.0.62/mapped/gui.jar?jwscode=f12ks21092?version-id=2.2Note: that i have forced JWSID parameter in the URL, that's why the query string contains 2 "?"
- forcing this is because the mapped/*.jar is redirected JnlpDownloadServlet that supports versions , diffs - i cannot use 'version' to put there the jswid param(e.g .../mapped/gui.jar version="fk12ks21092_2.2" because the JnlpDownloadServlet will not find this version , and if JWS Servlet will redirect to JnlpDownloadServlet with correct version param in request, the JWS Client will raise an exception because version responded is not right(JNLPDownloadServlet marks in response HTTP header the version of the jar so JWS CLient will chek it)
JWS Client expects version 'fk12ks21092_ver2.2'; to correct this i should modify the JnlpDownloadServlet and i shouldnt
THE PROBLEM :
on older versions than 1.5 JWS Client raises an exception because it wants to create a temp file named
" gui.jar?jwscode=f12ks21092" because it contains "?"
Only with 1.5 that seems to parse the jar name until it meets "?" char :(
Thats why i wanted to send an error to the client to upgrade to Java Web Start 1.5
Now, maybe u have a solution to this problem...
All i want is a solution to let JWS Client download jars only if the user is authenticated by some mecanism....and also support the versioning system.
Also:
Note that the jar names must preserve on the client JWS Cache dir ( i cannot use the same method to pass the JWSCODE when requesting the JARS as when requesting the JNLP).

You need to look into JAAS

Little Mailprogramm works in JBuilder but do not work with a JAR File

Hallo !
The application works in JBuilder, but if I make an archive it dont work. If have included "JavaMail" and "JavaBeans Activation Framework". (same as in the JBuilderProject)
The Error Message is:
class javax.mail.MessegingException: IOException while sending message; nested exception is:
javax.activation.UnsupportedDataTypeException: no object DCH for MIME type multipart/mixed;
at javax.mail.Transport.send0
at javax.mail.Transport.send
I have other applications which work on JBuilder an as Jar-File, but why this application not ?
I have JBuilderProfessional in use.
Are there some licenceproblems with "JavaBeans Activation Framework".
Please help me.
Thank you !
Wolfgang

I think I have found a solution here:
http://forum.java.sun.com/thread.jsp?thread=74127&forum=43&message=519108

Using a JAR file as a project file

My application allows the user to create projects. Previously, a project file was simply an XML file. Now, a project file needs to also contain many images.
I thought it would be a good idea to simply use a JAR file as my project file.
Since I've really never really worked with JAR files and the java.util.Jar package directly, I have a few questions.
1) Would it be better just to simply store the images as binary in the XML file? I just spent a good amount of time making the XML file very readable so I thought it would be better to keep the images separate while still having a single "project" file.
2) Is there anything inherently wrong with the way I'm working with the JAR file in the code below?
Simple XML file:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE project [
<!ELEMENT project (img+)>
<!ELEMENT img EMPTY>
<!ATTLIST img src CDATA #REQUIRED>
]>
<project>
     <img src="blah.jpg"/>
</project>
import java.io.*;
import java.util.jar.JarFile;
import javax.xml.parsers.*;
import org.xml.sax.*;
import org.xml.sax.helpers.DefaultHandler;
public class LoaderTest {
    private String imageName;
    public LoaderTest() {
        InputStream i = null;
        JarFile jf = null;
        try {
            jf = new JarFile("project.jar");
            i = jf.getInputStream(jf.getJarEntry("project.xml"));
            // Here's my simple XML parser to load the project and images
            SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
            parser.parse(new InputSource(i), new DefaultHandler() {
                @Override
                public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
                    // Right now we only care about images
                    if (qName.equalsIgnoreCase("img")) {
                        imageName = attributes.getValue("src");
            // Load the image from the inputstream
            java.awt.image.BufferedImage img = javax.imageio.ImageIO.read(jf.getInputStream(jf.getJarEntry(imageName)));
            // Display the image in a JFrame
            javax.swing.JFrame f = new javax.swing.JFrame();
            f.setLayout(new java.awt.BorderLayout());
            f.setSize(800, 600);
            f.getContentPane().add(new javax.swing.JLabel(new javax.swing.ImageIcon(img)), java.awt.BorderLayout.CENTER);
            f.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
            f.setVisible(true);
        } catch (ParserConfigurationException ex) {
            ex.printStackTrace();
        } catch (SAXException ex) {
            ex.printStackTrace();
        } catch (IOException ex) {
            ex.printStackTrace();
        } finally {
            // Do our best to close the input streams
            if (i != null) {
                try {
                    i.close();
                } catch (IOException ex) {}
            if (jf != null) {
                try {
                    jf.close();
                } catch (IOException ex) {}
    public static void main(String[] args) {
        new LoaderTest();
}Thank you!

1) I also think it's much better to keep your images separate from your XML, this prevents a lot of in case you just want to read XML data
2) What's exactly going wrong here? For the project.xml, make sure it's not inside a directory within the JAR file, or else the variable i will be null. Otherwise it looks fine..

I Can't Create my jar File

I have a package called voiceexpert which contains three classes: Disease, DiagnosingEngine and Symptoms which is a JavaBean. Symptoms makes use of Disease and DiagnosingEngine objects.
voiceexpert is stored in the directory: c:\diagapp3
I compiled Symptoms.java as below:
c:\diagapp3> javac -d . Symptoms.java
The class files for Disease.java, DiagnosingEngine.java and Symptoms.java are placed in the directory: voiceexpert.
I created a Manifest.txt file inside c:\diagapp3 containing the following:
Main-Class:voiceexpert.voiceexpert.Symptoms
Name:voiceexpert/Symptoms.class
Java-Bean:True
I later created the jar file with the command:
jar cfm jjj.jar Manifest.txt voiceexpert\*.*
But, I am having the error message: "*invalid header field*".
What can I do to remove this error?
Note: I created the Manifest.txt using utf-8 encoding. My code is to be used in a third-party application and that is why it does not contain a main method.
The link I was referred to could not help me. I need help please!
Edited by: Adeyi on Feb 24, 2010 2:26 AM
Edited by: Adeyi on Feb 24, 2010 2:34 AM

Adeyi wrote:
..I created a Manifest.txt file inside c:\diagapp3 containing the following:
Main-Class:voiceexpert.voiceexpert.Symptoms
Note: I created the Manifest.txt using utf-8 encoding. My code is to be used in a third-party application and that is why it does not contain a main method.Why are you specifying a main-class when the API has none?
The link I was referred to..What link? Just imagine for the moment that the Internet is a big place and we are not psychic.

How to add a Jar file to J2EE Server Component Library ?

Hello,
My objective:
=====================================================
To add a 3rd party jar file to be a runtime jar file to J2EE Server Component
Library project.
I have created a J2EE Server Component Library project.
I have built the J2EE Server Component Library project to get the provider.xml file and place the provider.xml under the J2EE Server Component Library project's server folder.
Here is my problem:
=====================================================
I can't open the provider.xml with SAP's special editor for the provider.xml.
The special SAP editor doesn't exist for me.
Here is my question:
=====================================================
Q1) Do I copy/paste my JAR_X file where <jar_0> is located? (Below is the
      J2EE Server Component Library SDA structure.)
Q2) If you were to update the provider.xml with notepad, what would you
type in provider.xml for JAR_X?
Q3) Is there anything else that I need to do?
Thanks,
Steve
J2EE Server Component Library SDA structure.
======================================
|-META-INF_
|         |-manifest.mf
|         |-sap_manifest.mf
|         |-SearchRules.xml
|         |-<SDA>.xml
|         |...
|-<jar_0>
|- ...
|-<jar_N>
|-dispatcher_
|           |-provider.xml
|           |-properties
|           |-runtime.properties
|           |-persistent__
|           |            |-<persistent_files(2)>
|           |-descriptors_
|                        |-<descriptor_files(3)>
|-server_____
|           |-provider.xml
|           |-properties
|           |-runtime.properties
|           |-persistent__
|           |            |-<persistent_files>
|           |-descriptors_
|                        |-<descriptor_files>
|-os_libs____
            |-<char set>__
                         |-<platform>__
                                      |-<jvm bitlength>__
                                                        |-<native lib files>

Thank you for all your solution...
my provider.xml was missing the <!DOCTYPE> tag for me to use the SAP LibraryDD Editor
Thanks again,
Steve
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE provider-descriptor SYSTEM "library.provider.dtd">
<provider-descriptor>
     <display-name>
      Your_Lib_Name
    </display-name>
     <component-name>
      Your_Lib_Name
    </component-name>
     <major-version>6</major-version>
     <minor-version>40</minor-version>
     <micro-version>0</micro-version>
     <provider-name>
      sap.com
    </provider-name>
     <references>
          <reference
               provider-name="sap.com"
               strength="weak"
               type="library">Your_Lib_Name</reference>
     </references>
     <jars>
          <jar-name>my_jar.jar</jar-name>
     </jars>
</provider-descriptor>

Problems with signed JAR files in JWS/JRE6 environment.

Hello All,
I'm encountering a problem running our desktop application as a Java Web Start deployment in a JRE 6 environment. There were never any problems when running the same application as a JWS deployment in JRE 1.4, or 5, environments. There are also currently no problems in a JRE 6 environment when running the application as a standard desktop application.
The problem which I am having has nothing to do with launching the application. But for good measure, I verified the JNLP file with JaNeLA. A couple things we out of order, which I addressed to make JaNeLA happy, but my problem still persists. Here is my JNLP file (anonymized to protect the innocent):
TS: 2010-10-18 17:04:46
<?xml version="1.0" encoding="UTF-8"?>
<jnlp codebase="$$codebase" href="$$name">
     <information>
          <title>Acme Desktop</title>
          <vendor>Acme Corporation</vendor>
          <homepage href="http://www.acme.com/"/>
          <description>Acme Client for Acme Server</description>
          <description kind="tooltip">Acme Client for Acme Server</description>
          <icon href="desktop.gif"/>
          <offline-allowed/>
     </information>
     <security>
          <all-permissions/>
     </security>
     <resources>
          <j2se version="1.5+"/>
          <jar href="acmedesktop.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/antlr-2.7.2.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/backport-util-concurrent.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/commons-codec-1.3.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/commons-httpclient.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/commons-logging.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/acmeapi.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/HelpJavaDT.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/HelpJavaDT_es.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/jacorb.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/Multivalent.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/slf4j-api-1.5.6.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/slf4j-jdk14-1.5.6.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/snow.jar" download="lazy" version="8.00.01.00+"/>
          <jar href="lib/AcmeTMClient.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/xercesImpl.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/xml-apis.jar" download="eager" version="8.00.01.00+"/>
          <extension name="installer" href="desktopInstaller.jnlp" />
          <extension name="Java Help" href="help.jnlp"/>
          <property name="java.library.path" value="./lib"/>
          <property name="admin" value="false"/>
          <property name="webstart" value="true"/>
          
     </resources>
     <resources os="Windows">
          <nativelib href="lib/jniWin32.jar" version="8.00.01.00+"/>
     </resources>
     <application-desc main-class="desktop"/>
</jnlp>-----
When running as a JWS deployment, on JRE 6, the application will be functioning normally for a little while, and then suddenly the following exception is thrown, and the current operation fails because the class in question cannot be accessed:
java.lang.SecurityException: class "acmeapi.communication.CDocImpl"'s signer information does not match signer information of other classes in the same package
     at java.lang.ClassLoader.checkCerts(ClassLoader.java:807)
     at java.lang.ClassLoader.preDefineClass(ClassLoader.java:488)
     at java.lang.ClassLoader.defineClassCond(ClassLoader.java:626)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
     at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
     at com.sun.jnlp.JNLPClassLoader.findClass(JNLPClassLoader.java:288)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
     at acmeapi.common.CDoc.getAnnotationsInfo(CDoc.java:493)
     at acmedesktop.communication.CCommunicationManager.privateGetAnnotations(CCommunicationManager.java:1976)
     at acmedesktop.communication.CCommunicationManager.getAnnotations(CCommunicationManager.java:1828)
     at acmedesktop.annotations.CViewAnnotations.getAnnotations(CViewAnnotations.java:826)
     at acmedesktop.annotations.CViewAnnotations.createView(CViewAnnotations.java:583)
     at acmedesktop.annotations.CViewAnnotations.setData(CViewAnnotations.java:736)
     at acmedesktop.annotations.CViewAnnotations.init(CViewAnnotations.java:205)
     at acmedesktop.hitspanel.CHitsPanel.viewAnnotations(CHitsPanel.java:281)
     at acmedesktop.hitspanel.CHitsTab$3.mousePressed(CHitsTab.java:316)
     at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:263)
     at java.awt.Component.processMouseEvent(Component.java:6260)
     at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
     at java.awt.Component.processEvent(Component.java:6028)
     at java.awt.Container.processEvent(Container.java:2041)
     at java.awt.Component.dispatchEventImpl(Component.java:4630)
     at java.awt.Container.dispatchEventImpl(Container.java:2099)
     at java.awt.Component.dispatchEvent(Component.java:4460)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4235)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
     at java.awt.Container.dispatchEventImpl(Container.java:2085)
     at java.awt.Window.dispatchEventImpl(Window.java:2478)
     at java.awt.Component.dispatchEvent(Component.java:4460)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)-----
The classes of our desktop product are contained within the 'acmedesktop' and 'acmeapi' packages. It requires access to the hard drive of the workstation, and therefore, all jar files included with the application are signed using the following ANT task when compiled:
<signjar keystore="resources/codesigning/keystore.pfx" storetype="pkcs12" storepass="myPassword" alias="myAlias">
     <fileset dir="${jws_dist}/app" includes="*.jar"/>
     <fileset dir="${jws_dist}/app/lib" includes="*.jar" excludes="jhall__V${dt_version}.jar"/>
</signjar>-----
Therefore, all classes, within all jar files, are signed with the same certificate (with the exception of the JavaHelp libraries, which are already signed by Sun - but the class in question attempting to be loaded here is not contained within the JavaHelp jar file anyway). So, the point being, that the exception message stating that the "signer information of the acmeapi.communication.CDocImpl class doesn't match the signer information of other classes in the same package", is simply not correct. All classes within that jar file were signed using the same certificate.
I downloaded the JRE 6 source from dev.java.net and picked through this issue with a debugger. The ClassLoader.checkCerts() method compares the certificate used to sign the current class which is attempting to be loaded, with the certificates which signed all other previously loaded classes within the same package. If they don't match, the exception above is thrown. What is causing the issue is when the checkCerts() method attempts to get the certificates which signed the currently loading class, null is returned. And obviously, comparing null, with an array of the certificates which signed the previously loaded classes, isn't going to match; therefore this exception is thrown.
The checkCerts() method gets the certificates of the currently loading class by calling the java.security.CodeSource.getCertificates() method. Tracing deeper in the debugger, the CodeSource object ultimately gets the certificates from the 'signersRef' member variable of the com.sun.deploy.cache.CachedJarFile class. signerRef is a SoftReference object and can therefore be garbage collected at some point. If it has already been garbage collected, the CachedJarFile class will attempt to retrieve it again from the loaded cache entry by calling com.sun.deploy.cache.MemoryCache.getLoadedResource().
The MemoryCache class maintains the cache entries to the jar files as MemoryCache.CachedResourceReference objects, which subclass WeakReference, and therefore these objects can be garbage collected as well. If the cache entries have also been garbage collected, this leaves the CachedJarFile class with no ability to repopulate the CachedJarFile.signerRef object. Therefore it is completely out of luck getting the certificates which signed the currently loading class, which ultimately causes the above exception.
When the com.sun.deploy.cache.Cache class attempts to retrieve a cache entry using its getCacheEntry() method, it will attempt to get the entry from the MemoryCache class, if null is returned, it will recreate the cache entry and add it back to the MemoryCache. In contrast, when the CachedJarFile class attempts to get a cache entry from the MemoryCache class, if null is returned, it just gives up.
(from com.sun.deploy.cache.CachedJarFile:244)
private CacheEntry getCacheEntry() {
     /* if it was not created by Cache do not search for entry */
     if (resourceURL == null)
          return null;
     CacheEntry ce = (CacheEntry) MemoryCache.getLoadedResource(resourceURL);
     if (ce == null) {
          //This should not happen because CacheEntry should not get collected
          // before CachedJarFile is collected.
          Trace.println("Missing CacheEntry for " + resourceURL + "\n" + ce,
               TraceLevel.CACHE);
     return ce;
When debugging, code execution falls within the code block with the comment stating "This should not happen...", but it is happening in my case.
On an interesting side note, using the jvisualvm.exe tool included with JDK 6, I was able to tell that it seems as though these objects are collected the first time that the JVM allocates more heap space, and then the issue will occur. If I set the initial heap size very large (using -Xms) this issue won't occur at all. But that is kind of a bad solution which I would rather not do, but it is interesting to note for the sake of troubleshooting this issue. The max heap size (-Xmx) is plenty big enough, so the issue is not that we are running out of memory here.
Does anyone have any insight as to what could be causing this? I've searched, and found a couple threads with similar problems but with no clear solutions. It is not just one workstation either, it happens everywhere I deploy the app as a Java Web Start application in a JRE 6 environment. I have been using version 1.6.0_18 on XP, but it seems to happen on any update version of 1.6. Is the fact that the CachedJarFile class doesn't attempt to reload the resource when it can't retrieve it from MemoryCache a bug? I've dug as deep as I can on this and I'm at wits end, does anybody have any ideas?
Thank you
Jake
Edited by: jkc532 on Nov 12, 2010 10:35 AM

jkc532 wrote:
.. Is the fact that the CachedJarFile class doesn't attempt to reload the resource when it can't retrieve it from MemoryCache a bug? From your comprehensive investigation and report, it seems so to me.
..I've dug as deep as I can on this and I'm at wits end, does anybody have any ideas?Just after read the summary I was tired, so I have some understanding of the effort you have already invested in this (the 'wits' you have already spent). I think you should raise a bug report and seek Oracle's response.

Problems with creation of JAR file

Hi!
I can't succeed in creating a JAR file for my application.
I've followed the guide at http://java.sun.com/docs/books/tutorial/deployment/jar/basicsindex.html
but apparently im doing something wrong....
I've tried doing an extra Manifest file aswell as "Setting an Entry Point with the JAR Tool" as written in the guide. noen with success however :(
I always get the error "Could not find the main class. Program will exit." from the JVM when I try to run my JAR file.
Structure of my program:
C:\searchpath\moresearchpath\projectname\src\
inside src\ there are 3 packages called; "graphic", "client" and "server".
I want to make a JAR file from the files in the "server" package. The "server" package consists of these following 4 files(and nothing more); "ClientHandler.java", "TestServer.java", "ServerModel.java", "ServerController.java".
"TestServer.java" is my main class!
This is an example of a command I've done in order to try to make a JAR file:
"C:\searchPathToWhereJavaIsInstalled\jdk1.6.0\bin\jar cvfe sgwserver.jar server.TestServer server\*"
This doesn't generate any error. However when I try to start the .jar I get following message "Could not find the main class. Program will exit."
I've also tried creating manifest file manually but without success (with UTF-8 encoding and not double .txt ending on file)
This is how the "Manifest.txt" file has looked when I've tried making one:
Main-Class: server.TestServer
I have used Netbeans 5.5 and Java SE 6 for development
What am I doing wrong? Please help me :(

If I try to run the one generated from Netbeans I get the following error message: "Failed to load Main-Class manifest attribute from C:\searchpath\moresearchPath\projectName\dist\projectName.jar"
The thing is I need 2 JAR files, one that contains the files in the "server" package and one that has all other files. The other one is an applet and the files in "server" package are a standalone application.
How do I get the standalone application's JAR file to work?

Problem loading Applets from Jar files on 64 bit machine

I am developing an applet (extends Applet but uses swing components) using JDK 1.6 (Though these problems still happen in JDK 1.7) and I am unable to get the applet to load on a 64 bit machine in most cases. The web server(s) are running on localhost and I am connecting on the same machine using a local network ip address (such as 192.168.*.*)
Below are all of my test results. Can someone provide a suggestion for repairing this? The Windows Server machine is a clients computer I access to it via remote desktop but I can't do much with it though I do have administrator rights. The Windows 7 machine is my development platform so I have been able to do extensive testing on it.
This problem is presenting in the following environments when trying to load an applet from JAR files in a HTML document using the Applet or Object tag.
Windows Server 2008 (Intel Chipset)
Tested Browsers:
Internet Explorer 9 (32 bit) - Shows it is blocked by default then simply shows an x when loaded from a web page, same result when loading from local drive.
Windows 7 Home Premium (AMD Chipset)
Tested Browsers:
Firefox 6.0.1 (32 bit) - Java logo shows with spinner, after a few minutes there is finally an error that a class in the jar was not found
Internet Explorer 9 (32 bit) - Java logo shows with spinner, after a few minutes there is finally an error that a class in the jar was not found
Internet Explorer 9 (64 bit) - Java logo shows with spinner and most of the windows desktop manager freezes, keyboard is the only thing that responds so you can alt-tab to another app to regain control of the desktop.
Chrome (32 bit) - Java logo shows with spinner, after a few minutes there is finally an error that a class in the jar was not found
The only way I have been able to get a Java applet to run on a 64 bit machine are the following ways.
Firefox 9 nightly (64 bit) works perfectly! Go Firefox!
Internet Explorer 9 (32 bit) loading directly from drive (c:\...)
Chrome (32 bit) loading directly from drive (c:\...)
Firefox 6.0.1 (32 bit) loading directly from drive (c:\....)
Can someone please help! I've been fighting with this bug for over a week and I can't find anything that will solve it, I have noticed that in some cases if my jar has very little code in it than it will run on the server, but the minute I start adding things to it the jar won't load anymore.

jschell wrote:
rritoch wrote:
I am developing an applet (extends Applet but uses swing components) using JDK 1.6 (Though these problems still happen in JDK 1.7) and I am unable to get the applet to load on a 64 bit machine in most cases.
To clarify...
1. You have tried it on 32 bit machine? Exactly which OS?I tested this on Windows Vista Business which is in 32 bit mode and the applets run without any problems
>
2. Your only 64 bit tests have involved 2008/Win7?
If so then I would suspect something with windows not java. Probably permissions.
The web server(s) are running on localhost and I am connecting on the same machine using a local network ip address (such as 192.168.*.*)
Yes, I haven't tried running the jars on other operating systems.
>
I don't understand that. If you are running on localhost then you should connect to localhost. If running on an IP then you should connect to that. Perhaps you meant that you have tested using both of those?I'm testing using the lan ip address but I'm connecting from the same machine. I've tried localhost and that didn't work so I tried lan ip since that will likely have a different java security context than localhost. At first I was blaming the IIS server but I downloaded the jar directly and using HTTP fox was able to verify that the jar is being sent with the correct mime-type and that the server can upload the jar file without a problem. This leaves me to believe the problem is with Java.

How to put Chinese character in jar file by java.util.jar.Manifest?

Now I want to develop a simple package tool which can modify some property in manifest.mf of jar files,but the Manifest class's putValue method only can correctly save English character.why?
And how can I put Chinese character?
the code is:
Attributes ab = mf.getMainAttributes();
ab.putValue("agent-Name", agent);

Attribute values can contain any character and it will be UTF-8 encoded when written to the manifest, according to Javadoc.
What makes you think that this mechanism fails? What do you see instead of the Chinese character? And what tool/editor/program you use to see it? I did not try myself, but according to the Javadoc there should be no problem.

How to set Mime Type for Static Files

Hi All,
I am working on Apex 3.2.1.00.10.
When I am trying to upload (create) a ".js" file into Static Files under Shared Components of an application; it is saving as "*text/plain*" for Mime Type. But I need Mime type to be set as "*application/x-javascript*".
Please help me to change the Mime type of .js file.
Or is there any way to upload the file directly as "*application/x-javascript*" as its Mime Type.
Thanks in advance.
Umesh

In IIS v4 which comes with the Windows NT4 option pack, you right click the web page you are working with, select properties, then go to the HTTP Headers tab. At the bottom there's a button labelled File Types in the MIME Map section.
After you've clicked that, you can add the two mime types you need;
Associated Extension MIME Type
.jar application/x-java-jar-file
.jnlp application/x-java-jnlp-file
I'm assuming that it is the same in W2k/IIS5.

How to include externel library in JAR file?

Hi all =)
I have a program that uses an external library (in a JAR file) I would like to compile my program as a JAR and have it include the external library that it needs to run, so that the external library would not need to be on the computer running my program. How can I do this?
Thanks =)
Koneko349
Message was edited by:
Koneko349

Ok I was able to make my JAR and launch my application correctly. However whenever I click a button that has a method using my external library I get the following error:
C:\Documents and Settings\Koneko>java -jar D:\Mangment.jar
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: org/apache/poi/poifs/filesystem/POIFSFileSystem at managment_system.ManagmentGUI.getNextStat(ManagmentGUI.java:569) at managment_system.ManagmentGUI$1.actionPerformed(ManagmentGUI.java:195)
I do not get this error when I run and use my program from within the IDE.
The JAR that has my external library (and has the class for POIFileSystem) is also on my D drive and i referenced it correctly (I think) In my classpath:
<?xml version="1.0" encoding="UTF-8"?>
<classpath>
     <classpathentry kind="src" path=""/>
     <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
     <classpathentry kind="lib" path="D:/poi.jar"/>
     <classpathentry kind="output" path=""/>
</classpath>I would really like to get this working and I'm very confused XP

OIM 11g Using exportMetaData.sh to export the jar files error

Env OIM 11g (11.1.1.5.0) with iPlanet Connector installed on Linux 32-bit.
When running the exportMetaData.sh with the filter for configuration for the Jars files as “*”.
The error output is:
/home/oracle/exportData/exportPackage/Jars/JavaTasks/SJSDSProv.jar
java.io.FileNotFoundException: /home/oracle/exportData/exportPackage/Jars/JavaTasks/SJSDSProv.jar (No such file or directory)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:179)
at java.io.FileOutputStream.<init>(FileOutputStream.java:131)
at oracle.iam.OIMMigration.util.OIMMigrationUtility.main(OIMMigrationUtility.java:206)
java.util.zip.ZipException: ZIP file must have at least one entry
at java.util.zip.ZipOutputStream.finish(ZipOutputStream.java:304)
at java.util.zip.DeflaterOutputStream.close(DeflaterOutputStream.java:146)
at java.util.zip.ZipOutputStream.close(ZipOutputStream.java:321)
at oracle.iam.OIMMigration.util.OIMMigrationUtility.createZipFile(OIMMigrationUtility.java:429)
at oracle.iam.OIMMigration.util.OIMMigrationUtility.main(OIMMigrationUtility.java:242)
Export Package created : /home/oracle/exportData/exportPackage_2012:03:26::11:22:04.zip
Exiting...
The config.xml file used is (as provided in the document)
<?xml version="1.0" encoding="utf-8"?>
<MigrationDetails operation="Export">
<entityDetails>
<EntityType>Jars</EntityType>
<FilteringCriteria>
<Attribute>
<Name>Jar_Type</Name>
<Filter>*</Filter>
</Attribute>
</FilteringCriteria>
</entityDetails>
<entityDetails>
<EntityType>Plugins</EntityType>
<FilteringCriteria>
<Attribute>
<Name>Plugin_Name</Name>
<Filter>*</Filter>
</Attribute>
</FilteringCriteria>
</entityDetails>
<entityDetails>
<EntityType>CustomResourceBundles</EntityType>
<FilteringCriteria>
<Attribute>
<Name>Resource_Type</Name>
<Filter>*</Filter>
</Attribute>
</FilteringCriteria>
</entityDetails>
</MigrationDetails>
The exportMetaData.sh is correctly configured and those directories exist on the system.
CONTEXT_FACTORY="weblogic.jndi.WLInitialContextFactory"
PACKAGE_LOCATION=/home/oracle/exportData
TEMP_LOCATION_TO_EXTRACT=/home/oracle/exportTemp
CONFIGURATION_FILE=/odrive/oracle/oim11g_MWH/Oracle_IDM1/server/bin/config.xml
MODE="export"
Any help to resolve this issue would be much appreciated.
Regards,
Shane

Hi Shane,
The problem appears to be an issue where the directory created is called "JavaTask" but the jars are trying to be placed into "JavaTasks".
Note the "s" appended at the end.
If you manually create the JavaTasks directory then run the tool, it should work.

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