asked on

java webstart + mysql

Hi,
i've write a little class to connect to mysql server:
Connection conn = null;
try {
String userName = "root";
String password = "admin";
String url = "jdbc:mysql://hostname:3306/cs";
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
} catch (Exception e) {
System.err.println(e.toString());
}
try {
conn = DriverManager.getConnection(url, userName, password);
System.out.println("Database connection established");
} catch (Exception e) {
System.err.println(e.getStackTrace());
}
} catch (Exception e) {
System.err.println(e.toString());

}
If the class is executed in a Java application, it's ok, but when using Java Webstart i get error shown below:

Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTION
java.net.SocketException
MESSAGE: java.security.AccessControlException: access denied (java.net.SocketPermission hostname:3306 connect,resolve)
STACKTRACE:
java.net.SocketException: java.security.AccessControlException: access denied (java.net.SocketPermission hostname:3306 connect,resolve)tat com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:156)
com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:276)
com.mysql.jdbc.Connection.createNewIO(Connection.java:2641)
com.mysql.jdbc.Connection.<init>(Connection.java:1531)
com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
java.sql.DriverManager.getConnection(DriverManager.java:525)
java.sql.DriverManager.getConnection(DriverManager.java:171)
Cs.getNewConnection(Cs.java:218)
Cs.start(Cs.java:452)
Cs.<init>(Cs.java:1234)
Cs$21.run(Cs.java:1709)
java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
** END NESTED EXCEPTION **
packet sent to the server was 371 ms ago.

i test this class in NetBeans 5.0 ide environment, and the database is located in a remote server.
i try to add <security> <all-permissions/> </security> tag to my jnlp file bat an error message tell me that the jar is not signed (obviously,i did that)

..thank you

SOLUTION

Ajay-Singh

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ASKER CERTIFIED SOLUTION

Mick Barry

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dany996

ASKER

..sorry but this problem drive crazy.

i try to debug the class in the NetBeans 5.0 ide environment the problems are:
      (i should sign the jar also in debug mode?, if so, how can do it?)

      in debug i get this exception "java.lang.ClassNotFoundException: com.mysql.jdbc.Driver" when i try
      to execute Class.forName("com.mysql.jdbc.Driver").newInstance();

      so i've insert into the jnlp resources entry:
            <resources locale="" os="">
            <jar download="eager" href="dist/mysql-connector-java-5.0.3-bin.jar" main="false" version=""/>
            </resources>

      in this case the drive is loaded but when the statement below is executed i get the
      java.security.AccessControlException: access denied (java.net.SocketPermission hostname:3306 connect,resolve)

            conn = DriverManager.getConnection(url, userName, password);



      so i try to deploy the application and then sing then jar and the mysql-connector-java-5.0.3-bin.jar
      put the war file on the tomcat server, stop the service replace the jar with the signed one
      then restart.

      in this case i get the error

      An error has been taken place during the execution of the application.

            Title: test
            Fornitore: Company, Inc.
            category: download error

            resource not signed: http://hostname:8080/prova/dist/mysql-connector-java-5.0.3-bin.jar

      ..but the jar is singed!

      this is the jnlp generated by netbeans:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE jnlp PUBLIC "-//Sun Microsystems, Inc.//DTD JNLP 1.5//EN" "http://www.netbeans.org/jnlp/DTD/jnlp.dtd">
<jnlp codebase="$$codebase" href="prova.jnlp">
<information>
<title>test</title>
<vendor>Company, Inc.</vendor>
<homepage href="homepage.html"/>
<description> </description>
<icon href="default"/>
<offline-allowed/>
<shortcut online="true"/>
</information>
<resources>
<j2se href="http://java.sun.com/products/autodl/j2se" version="1.4+"/>
</resources>
<resources>
<jar download="eager" href="dist/prova.jar" main="false"/>
</resources>
<resources locale="" os="">
<jar download="eager" href="dist/mysql-connector-java-5.0.3-bin.jar" main="false" version=""/>
</resources>
<application-desc main-class="prova.Main"/>
</jnlp>

thanks

Mick Barry

yes u need to include the mysql jar in your jnlp, and u also need to sign that jar
if its saying it isn't then check it isn't being cached, and its using an unsigned version

dany996

ASKER

i solved the problem, for unknown reason the java web start said the mysql-connector-java-5.0.3-bin.jar was unsigned
but the jarsign -verify confirmed me that jar was correctly signed!
so, i unziped the jar then i removed the manifest file, zip again and then sign again.
after this all works fine.

someone can explain me why?

Mick Barry

was it signed with the same cert that you app was signed with?

dany996

ASKER

..yes.

dany996

ASKER

sorry, i'd like to share points to Ajay-Singh and objects,
how can i do?

Mick Barry

ask cs to repen q

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