Tips For Resolving Unsaved Cfx Tags

 

Over the past few weeks, some of our readers have encountered a known error where the cfx tag is not registering. This problem can arise for several reasons. Let’s take a look at them below.

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I added a custom cfx tag “CFX_imageinfomx” in front of my codes. But it returns a new error: “The cfx custom tag CFX_imageinfomx may not be found in the custom tag database.” So I need to inject imageinfomx register.java into CF-Admin. So guys, does anyone know the format for imageinfomx.java? With it I can easily generate imageinfomx.class and create my own CFX_imageinfomx.

To create a Java CFX tag, grow a class that implements the custom tag user interface. This interface contains the ProcessRequest method, which is considered to be passed request and response objects, which are then used to record the tag’s behavior.
The following procedure example creates a simple Java CFX withnamed cfx_MyHelloColdFusion, which uses the tag to write a series of text on the calling page.

1. In your editor, create a main source file with the following code:

 public class MyHelloColdFusion implements CustomTagpublic void processRequest (request-request, response emotion)throws an exceptionThe string strName is equal to request.getAttribute ("NAME");response.write ("Hello," + strName);

2. Save the current file as MyHelloColdFusion.java in the WEB_INF / classes directory.

3. Compile the Java source file into a note using the Java compiler. If the public is using the command line tools included in the JDK, use the following administrative line that runs in each of our class directories:

 javac -classpath cf_root  WEB-INF  lib  cfx.jar MyHelloColdFusion.java 

Mark:

The previous command mostly works when the Java compiler (javac.exe) is using your path. If it does not appear in your path, specify the complete quality path; Example for c: jdk1.3.1_01 bin javac in Windows or / usr / java / bin / javac UNIX.

If you get errors during compilation, check the source code to make sure people entered it correctly. If there is no error location, then you have successfully written your first Java CFX tag.

You can access Java CFX tags from ColdFusion pages using the name of the new CFX tag that will be registered on this CFX tags page in the ColdFusion admin. This manufacturer must be prefixed with cfx_ followed by the class name (without the .class extension).

1. In these ColdFusion Administrators, select Extensions> CFX Tags.
2. Click Save Java CFX.
3. Enter a name for “recognize” (for example, cfx_MyHelloColdFusion).
4. Enter the class name without the .class extension (for example, MyHelloColdFusion).
5. (Optional) Enter a precise description.
6. Click Submit.
   Now you can name the Ab count by the ColdFusion page.

1. To actually invoke the custom HelloColdFusion tag, create a ColdFusion (.cfm) (.cfm) page in the editor with the following content:

2. Save each file in a directory configured to serve ColdFusion pages. For example, you can collapse the file C: inetpub wwwroot cfdocs testjavacfx.cfm on Windows, perhaps /home/docroot/cfdocs/testjavacfx.cfm on UNIX.
3. If you haven’t already, register the CFX tag through the ColdFusion Administrator (see Registering CFX Tags in the “Developing CFX Tags in C ++” section).
4. Request a page on the Internet with an appropriate URL; eg: //localhost/cfdocs/testjavacfx.cfm
   ColdFusion takes a process page and returns the last page labeled “Hello, Les”. If it returns an error instead, check your code source to make sure you entered it correctly.

1. In the ColdFusion Administrator, find> CFX tags for extensions.
2. Click the Delete icon for the tag you want to delete, usually in the Controls column of the CFX registered tag list.

The Java CFX tag implementation requires request and response objects to be overridden by the processRequest method when they interact. The com.allaire.cfx package which can be found in the WEB-INF / li archiveb / cfx.jar, contains Request, Response and Query objects.
For a complete description of these object types, see the ColdFusion Java CFX Reference in the CFML Reference. For a complete situation with the Java CFX tag using Request, Response and Query objects, see the ZipBrowser Example.

The request object is clearly passed to the processRequest method of the CustomTag interface. The table shortly thereafter lists the methods used in the Request object to get the attributes, including any requests passed to the tag, if needed, and to read the name parameters globally:

method	Description
AttributExists	Checks if an attribute has been passed to this tag.
debug	Checks if the label contains the Debug attribute.
getAttribute	Get the value of the passed attribute.
getAttributeList	Retrieves a list of attributes passed to the tag.
getIntAttribute	Determines the value for money of the attribute transmitted as an integer coupon.
getQuery	Extractt request passed to the header, if any.
getSetting	Gets the value of any global custom tag setting.

In detail

For reference information on these interfaces, see the CFML reference.

The response object is actually passed to the processRequest method of the CustomTag interface. The following table lists its response object methods for displaying an article, generating requests, and setting variables via the invocation page:

method	Description
write	Displays text on the call page.
Define Variable	Defines a variable in a particular pageview.
AddQuery	Adds a unit to request a page with a phone number.
writeDebug	Displays text on the debug stream.

In detail

See the CFML reference for each of these interfaces.

The Query object provides an interface for working with a query. Questions ColdFusion. The following table lists our native Query object methods for accessing names, row counts, and column names, and then methods for getting and setting computer data items:

method	Description
getName	Gets the name of all requests.
getRowCount	Get line numbering in a query.
getColumnIndex	Gets the index of the query column.
getColumns	Gets the new name for the column to query. A
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