Every time a cached JAR file is used, Oracle JInitiator updates the timestamp to indicate the date and time that the cached file was last used. If the cache size grows to the point where files must be removed in order to maintain the maximum cache size, Oracle JInitiator uses the timestamp of the cache files to determine which is the least recently used file and then removes that.
How can I tell that my cache is functioning correctly and that the JAR files are not being downloaded every time? When Oracle JInitiator needs to download a required file, it does so via the Web server that has been configured to run Forms Developer applications.
Modern Web servers support the use of log files that enable the tracking of what files have been downloaded, by whom, and when. The Web server log file uses a standard format to describe the transactions that have occurred.
This log format includes the name of the requested item and the result of the request. The result of the request is indicated using a set of standard HTTP status codes. If the JAR file was not downloaded because the timestamp on it was earlier than the cached file timestamp, then the log file will contain the name of the requested JAR file and the HTTP status code The following example shows an entry made in a log file using standard NCSA log formatting when the JAR file in the cache is not current and must be downloaded from the Web server.
The following example shows an entry made in a log file using standard NCSA log formatting when the JAR file in the cache is current and is therefore not downloaded from the Web server. It seems that when the JAR file is downloaded, a. JCX file is created in the jcache directory.
What is this file? As the JAR file is being downloaded a temporary copy of it is written to the file system. This temporary copy is identified by the. Once the download has successfully completed, the. If the download is interrupted at any point or the connection is dropped, the operation will not be complete and the temporary file will remain with a.
Oracle JInitiator will not load a file with a. I've verified that the caching is working correctly, but my application is still taking longer to start than I'd like. Why is that? What it does is save you the time it requires to download the required JAR files for each application startup. The operation of unzipping a JAR file, loading the contained classes into memory, and then authenticating them to ensure that they have not been tampered with takes a significant amount of the startup time.
In fact, on a very fast network the amount of time taken to download the JAR file will be smaller than the amount of time required to load the Java classes into memory and perform the authentication. This means that caching saves you very little in terms of overall application startup. On a slower network, the time required to download JAR files will become proportionately larger in the overall startup time, so JAR file caching becomes more important.
This section describes the AppletViewer. Upgraded versions are available for download from the Forms Developer Web site.
Set the clientBrowser parameter. If this is the case, you will need to follow the process to trust the Forms applet, as described later in this chapter in Section B. In order to prepare to run your application within the AppletViewer, make the AppletViewer available for download and inform your users that they will have to install the AppletViewer on their client machines.
Complete the following:. You must copy JDK. In general, when loading Java class files, the Forms applet is not trusted and, as such, cannot issue such system calls.
However, when the Forms applet is trusted, it is able to issue these calls. The Forms applet is considered trusted when one of the following is true:. These HTML file examples assume that you trusted the Forms applet by registering its signature on your machine.
JAR file. BAT file. This option assumes that every client has its browser executable installed into the same physical directory because the physical path of the browser is hard-coded in the HTML file. For example:. BAT File. This option is best if there is a possibility that clients have installed their browser executables into different physical directories.
It does assume, however, that all clients are using the same browser. For example, the HTML file might look like this:. A signature allows client machines to verify that a file has been downloaded from a valid and trusted entity a signer. This allows client machines to protect themselves from malicious or malfunctioning Java archive JAR files.
In order for a JAR file to be validated by a client, the signature of that file must be registered on the client machine. The Forms applet is itself a signed JAR file. You have two options for registering the Forms applet signature. Choose one of the following:. Re-sign the Forms applet with your own signature and register that signature on your client machine s. The certificate is a file named Dev. Type: javakey -c Developer true This command creates a trusted identity for the AppletViewer on the client's identity database using the exact name of the certificate provider.
Type javakey -ic Developer Dev. Copy this directory exactly; do not change the directory structure in any way. BAT in a text editor. Run the AppletViewer. Invoke a Web browser from within the AppletViewer. From the taskbar, choose Start Run. Click Oracle Forms Server. Click Custom. I had a similar issue and none of the above solutions worked for me. Usage: Just add an attribute called data-auto-download to the link pointing to the download in question:.
All this does is wait a second and a half, then append the div with the iframe referring to the file that you want to download. When the iframe is updated onto the page, your browser downloads the file. Simple as that. I checked and found, it will work on button click via writing onclick event to Anchor tag or Input button. The only thing is that I could not get the icons back to beloved IE icon. You saved me a system re-install. Are they wrong just for the future. But if you have had enough of IE, is fine, you made my day already, many thanks, Addict.
This no longer seems to be the case. On the subject of the IE icon, from the explorer. Hopefully this will bring back the Internet explorer icon, if you really want it. Similar threads D. Speed up loading DVD with hughe numbers of files that contains totally new unknown icons for windows. Replies 1 Views Mar 28, daan Windows 10 gets new icons for the File Explorer in latest Insider build.
Replies 7 Views Include your email address to get a message when this question is answered. Helpful 1 Not Helpful 0. Related wikiHows How to. How to. About This Article. Written by:. Darlene Antonelli, MA. Co-authors: 6. Updated: July 15, Categories: HTML. Article Summary X 1. Nederlands: HTM bestanden openen. Thanks to all authors for creating a page that has been read 53, times. Is this article up to date?
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