T5: 404 http error

8 Message(s) by 4 Author(s) originally posted in tapestry java

From: osamuo

Date: Tuesday, December 25, 2007

Hi,

How can I tell T5 to send an 404

<abuse> Someone who's clueless.  From the {World-Wide Web}
	message "404, URL Not Found" meaning that the document you've
	tried to access can't be located.

	"Don't bother asking him...he's 404, man".

	404 is one of the standard response codes of the {telnet}
	{protocol} on which the web's {HTTP} is based.

	The first 4 indicates a client error such as a mistyped URL.
	The middle 0 refers to a general syntax error.  The last 4
	just indicates the specific error in the group of 40x, which
	also includes 400: Bad Request, 401: Unauthorized, etc.

	(2000-03-18)

error

1. A discrepancy between a computed, observed, or measured
	value or condition and the true, specified, or theoretically
	correct value or condition.

	2. <programming> A mental mistake made by a programmer that
	may result in a program {fault}.

	3. (verb) What a program does when it stops as result of a
	programming error.

	(2000-03-28)

?

Is the following code

<software> Instructions for a computer in some programming
	language, often {machine language}.  The word "code" is often
	used to distinguish instructions from {data} (e.g. "The code
	is marked 'read-only'") whereas "{software}" is used in
	contrast with "{hardware}" and may consist of more than just
	code.

	(2000-04-08)

right way to show 404 error page on T5?
Because I got an error after calling "sendError()" in the code.Test.JAVA:
------------------------------------
public class

1. <programming> The prototype for an {object} in an
	{object-oriented language}; analogous to a {derived type} in a
	{procedural language}.  A class may also be considered to be a
	set of objects which share a common structure and behaviour.
	The structure of a class is determined by the {class
	variables} which represent the {state} of an object of that
	class and the behaviour is given by a set of {methods}
	associated with the class.

	Classes are related in a {class hierarchy}.  One class may be
	a specialisation (a "{subclass}") of another (one of its
	"{superclasses}") or it may be composed of other classes or it
	may use other classes in a {client-server} relationship.  A
	class may be an {abstract class} or a {concrete class}.

	See also {signature}.

	2. <programming> See {type class}.

	3. <networking> One of three types of {Internet addresses}
	distinguished by their most significant bits.

	3. <language> A language developed by the {Andrew Project}.
	It was one of the first attempts to add {object-oriented}
	features to {C}.

	(1995-05-01)

Test{
@xxxxxxxxxxx
private Response response;

void onActivate( Object[] parameters ) throws IOException{
//if( parameters == null

<programming> A special value used in several languages to
	represent the thing referred to by an uninitialised pointer.

	<database> A special value that may be stored in some database
	columns to represent an unknown, missing, not applicable, or
	undefined value.  Nulls are treated completely differently
	from ordinary values when evaluating SQL expressions and there
	are several SQL constructs for dealing with nulls.

	(2003-06-17)

|| parameters.length != 2 ){
response.sendError( 404, null );
return;
//}
}
}
------------------------------------

Error:
------------------------------------
[ERROR] RequestExceptionHandler Processing of request failed with uncaught
exception: STREAM

1. <communications> An {abstraction} referring to any flow of
	data from a source (or sender, producer) to a single sink (or
	receiver, consumer).  A stream usually flows through a channel
	of some kind, as opposed to {packets} which may be addressed
	and routed independently, possibly to multiple recipients.
	Streams usually require some mechanism for establishing a
	channel or a "{connection}" between the sender and receiver.

	2. <programming> In the {C} language's buffered input/ouput
	library functions, a stream is associated with a file or
	device which has been opened using {fopen}.  Characters may be
	read from (written to) a stream without knowing their actual
	source (destination) and buffering is provided transparently
	by the library routines.

	3. <operating system> Confusingly, {Sun} have called their
	modular {device driver} mechanism "{STREAMS}".

	4. <operating system> In {IBM}'s {AIX} {operating system}, a
	stream is a {full-duplex} processing and data transfer path
	between a driver in {kernel space} and a process in {user
	space}.

	[IBM AIX 3.2 Communication Programming Concepts,
	SC23-2206-03].

	5. <communications> {streaming}.

	6. <programming> {lazy list}.

	(1996-11-06)

JAVA.lang.IllegalStateException: STREAM
at org.mortbay.jetty.Response.getWriter(Response.JAVA:571)
at
org.apache.tapestry.int

1. <programming> A common name for the {integer} data type.
	In {C} for example, it means a (signed) integer of the
	computer's native {word length}.

	2. <networking> The {top-level domain} for international
	organisations.

	(1999-01-26)

ernal.services.ResponseImpl.getPrintWriter(ResponseImpl.JAVA:47)
at $Response_1171072b273.getPrintWriter($Response_1171072b273.JAVA)
at $Response_1171072b240.getPrintWriter($Response_1171072b240.JAVA)
at
org.apache.tapestry.internal.services.PageResponseRendererImpl.renderPageResponse(PageResponseRendererImpl.JAVA:58)
at
$PageResponseRenderer_1171072b261.renderPageResponse($PageResponseRenderer_1171072b261.JAVA)
at
org.apache.tapestry.internal.services.PageRenderRequestHandlerImpl.handle(PageRenderRequestHandlerImpl.JAVA:87)
at
$PageRenderRequestHandler_1171072b25d.handle($PageRenderRequestHandler_1171072b25d.JAVA)
at
org.apache.tapestry.internal.services.PageRenderDispatcher.dispatch(PageRenderDispatcher.JAVA:66)
at $Dispatcher_1171072b25f.dispatch($Dispatcher_1171072b25f.JAVA)
at $Dispatcher_1171072b253.dispatch($Dispatcher_1171072b253.JAVA)
at
org.apache.tapestry.services.TapestryModule$12.service(TapestryModule.JAVA:905)
--------------------------------------
View this message

In {object-oriented programming} sending a message to an
	{object} (to invoke a {method}) is equivalent to calling a
	{procedure} in traditional programming languages, except that
	the actual code executed may only be selected at run time
	depending on the {class} of the object.  Thus, in response to
	the message "drawSelf", the method code invoked would be
	different if the target object were a circle or a square.

	(1995-02-16)

in context: http://www.nabble.com/T5%3A-404-http-error-tp14493888p14493888.html
Sent from the Tapestry - User mailing list

<data> A data structure holding many values, possibly of
	different types, which is usually accessed sequentially,
	working from the head to the end of the tail - an "ordered
	list".  This contrasts with a (one-dimensional) {array}, any
	element of which can be accessed equally quickly.

	Lists are often stored using a cell and pointer arrangement
	where each value is stored in a cell along with an associated
	pointer to the next cell.  A special pointer, e.g. zero, marks
	the end of the list.  This is known as a (singly) "linked
	list".  A doubly linked list has pointers from each cell to
	both next and previous cells.

	An unordered list is a {set}.

	(1998-11-12)

archive

1. <file format> A single file containing one or (usually)
	more separate files plus information to allow them to be
	extracted (separated) by a suitable program.

	Archives are usually created for software distribution or
	{backup}.  {tar} is a common format for {Unix} archives, and
	{arc} or {PKZIP} for {MS-DOS} and {Microsoft Windows}.

	2. <operating system> To transfer files to slower, cheaper
	media (usually {magnetic tape}) to free the {hard disk} space
	they occupied.  This is now normally done for long-term
	storage but in the 1960s, when disk was much more expensive,
	files were often shuffled regularly between disk and tape.

	3. <networking> {archive site}.

	(1996-12-08)

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From: Sven Homburg