add policy in oracle db

Do you add a policy in oracle db for simulate a virtual db?
Ok! the dbms_rls.add_policy function do it for you!
Buuuuut, one moment please!
Do you have the two rights?
1) Privilege rights?
2) DB rights (Enterprise Edition)?

The first, you can get it from sys user, executing this grant:
GRANT EXECUTE ON dbms_rls TO YOUR_USER

The second one, you can get it only if you have the right oracle db version. Don't you know if your versione is Enterprise? ok! this is the query for to know the version of your oracle db:
select * from v$version

Uhm! Don't you understand if the db is standard or enterrprise?
OK! the following query can says you if you have the function for add policy:
select * from v$option where parameter like 'Fine%';

if true then
you can add policy
else
YOU CANNOT add policy

if you can't add policy you'll get this error:
ORA-00439: function not enabled: Fine-grained access control

OK?!

how to use f:attribute

the f:attribute tag is very useful when you want to pass an attributer inside a commandButton tag.
It plays in this way:

<h:commandButton id="bottoneForm"
actionListener="#{managebBean.actionListenerFunction}">
<f:attribute name="attributeName" value="attributeValue" >
</f:attribute>
</h:commandButton>

For to read it in the called actionListener function of the managebBean:

public void actionListenerFunction(ActionEvent e){
Object valueOfAttribute = e.getComponent().getAttributes().get("attributeName");
}

That's all Folks!

How to use h:selectOneRadio

Example

<h:selectOneRadio binding="#{visProfiliManagedBean.profiloDefaultModificato}" immediate="true"
value="#{visProfiliManagedBean.profDaModificare.profiloDefault}"
rendered="#{f.codProfilo==visProfiliManagedBean.profDaModificare.codProfilo&&visProfiliManagedBean.visModifica}">
<f:selectItem itemLabel="Si" itemValue="1" />
<f:selectItem itemLabel="No" itemValue="0" />
</h:selectOneRadio>

where visProfiliManagedBean.profiloDefaultModificato is a HtmlSelectOneRadio object and visProfiliManagedBean.profDaModificare.profiloDefault is a boolean, but it can be any type of object (ex.: String, int, etc.)

Empty JBoss Cache

I did a new Login page for my web application. I spent 3 days for the new layout.
So the only thing that separeted me from my new satisfaction was the deploy in the production environment
After the deploy in Jboss, i connect with the web application and ... oops: the login page was not changed!
OK! The first thing i I thinked was IE cache! But it wasn't...
The problem was the JBoss cache.
you've to delete the file {jboss_home}\server\{default}\tmp\deploy\tmpxxx{webApplicationName}.war
and {jboss_home}\server\{default}\tmp\deploy\tmpxxx{webApplicationName}

sendRedirect or writing to a Servlet response stream in JSF

Problem: i want to do a sendRedirect from an actionListener method of a JSF backingBean.
After reading the servlet response i do a sendRedirect but it is not sufficent, because i got this exception:

java.lang.IllegalStateException: Cannot forward after response has been committed

So, i must include this code after the sendRedirect method:

FacesContext context= FacesContext.getCurrentInstance();
context.responseComplete();

Ex.:
try {
HttpJsfUtil.getResponse().sendRedirect(url);
FacesContext context=FacesContext.getCurrentInstance();
context.responseComplete();
} catch (IOException e1) {
e1.printStackTrace();
}

The code above is the same in the case of a response stream: if you want to write in the response stream inside the actionListener method, after you close the response you have to include the above code before exit the method.
Ex.:
try{
HttpJsfUtil.getResponse().setContentType("application/x-download");
HttpJsfUtil.getResponse().setHeader("Content-Disposition", "attachment; filename="+fileName);
HttpJsfUtil.getResponse().setHeader("Cache-Control", "no-cache");
ServletOutputStream out= HttpJsfUtil.getResponse().getOutputStream();
out.write(imageBytes);
out.close();
FacesContext context=FacesContext.getCurrentInstance();
context.responseComplete();
}
catch (IOException ex)
{
System.out.println ("Envelope error: " + ex.getMessage ());
}

where HttpJsfUtil.getResponse() is

public static HttpServletResponse getResponse()
{
return (HttpServletResponse)FacesContext.getCurrentInstance().getExternalContext().getResponse();
}

From InputStream to byte array

Oh! And finally happen!
This is the code from converting(/writing/copying) an InputStream object into an array of byte:

InputStream is=urlc.getInputStream();
ByteArrayOutputStream outb = new ByteArrayOutputStream();
final int BUF_SIZE = 1 << 8; //1KiB buffer
byte[] buffer = new byte[BUF_SIZE];
int bytesRead = -1;
while((bytesRead = is.read(buffer)) > -1) {
outb.write(buffer, 0, bytesRead);
}
is.close();
byte[] imageBytes = outb.toByteArray();

And it works!

NT Authorization in a web application

This time i speak about the authorization microsoft windows based code in a java web application.
This is the the (servlet) code:

String auth = request.getHeader("Authorization");
if (auth == null)
{
response.setStatus(response.SC_UNAUTHORIZED);
response.setHeader("WWW-Authenticate", "NTLM");
response.flushBuffer();
return;
}
if (auth.startsWith("NTLM "))
{
byte[] msg = new sun.misc.BASE64Decoder().decodeBuffer(auth.substring(5));
int off = 0, length, offset;
if (msg[8] == 1)
{
byte z = 0;
byte[] msg1 = {(byte)'N', (byte)'T', (byte)'L', (byte)'M', (byte)'S', (byte)'S', (byte)'P', z,(byte)2, z, z, z, z, z, z, z,(byte)40, z, z, z, (byte)1, (byte)130, z, z,z, (byte)2, (byte)2, (byte)2, z, z, z, z, z, z, z, z, z, z, z, z};
response.setHeader("WWW-Authenticate", "NTLM " + new sun.misc.BASE64Encoder().encodeBuffer(msg1));
response.sendError(response.SC_UNAUTHORIZED);
return;
}
else if (msg[8] == 3)
{
off = 30;

length = msg[off+1]*256 + msg[off];
offset = msg[off+3]*256 + msg[off+2];
String domain = new String(msg, offset, length);

length = msg[off+9]*256 + msg[off+8];
offset = msg[off+11]*256 + msg[off+10];
String user = new String(msg, offset, length);

length = msg[off+17]*256 + msg[off+16];
offset = msg[off+19]*256 + msg[off+18];
String computerName = new String(msg, offset, length);
}
}