I'm asking here because I haven't been able to get a clean answer from Oracle, so I wanted to see if there were any Oracle experts out here!
As a high-level overview of what I'm trying to accomplish, I want to get a recently-moved two-way interface to authenticate through the served ASMX file to authenticate the username and password against an Oracle DB. I am getting an 'Invalid Credentials' SOAP Header Exception error on the web interface. In reviewing the setup of the old IIS server, I see there's an Oracle Data Provider installed on it. When I search for this ODP.Net provider, I see it's included with a configuration tool called the Oracle Universal Installer.
When I begin the install, I see it copying over a bunch of java JRE files, so I exited out as I was concerned it would mess up my existing setup. (This is the OXI server, not the App/DB server)
So my question is...would installing Oracle Universal Installer mess up my existing environment? (I realize this question is extremely specific to a particular environment) I've taken a snapshot of both my OXI and DB servers as a just in-case...I guess I am looking for a little extra comfort before continuing.
Thank you
In terms of Java I don't think so. The installer copies java files into sub-folder of your Oracle folder and that's it.
However, for other components it might do a lot and also break your existing application. It may overwrite the ODP.NET provider, change your PATH variable, etc.
Your question has to be more specific.
Related
I am new to Amazon web services and have recently inherited a lot of existing services.
One of the things I've been desperately needing is for our Amazon Elastic Beanstalk instance to be using Sun's Oracle JDK rather than openJDK.
This inconsistency has been making my java functionalities not working as expected since I do java development using Sun's Oracle JDK. Our legacy code is based on JDK7.
For example, the JPEG codec doesn't exist in openJDK, and the javascript Rhino engine doesn't support a JSON.stringify function. I've made workarounds to these, but that's just avoiding the bigger issue which is that I have no idea what openJDK doesn't support, and Oracle JDK seems to support just about everything.
According to the previous owner, I was recommended not to create my own "AMI" because then I would have to take care of all the internal resources myself. I was told that doing so would defeat the purpose of Elastic Beanstalk supposedly handling everything for us.
I cannot seem to find a straight answer around. I do not want to leave the Elastic Beanstalk ecosystem. I'm under the assumption that Amazon's EC2 is a whole different ecosystem where I would have to manage all the server's internals myself.
I just want to know, as of this current day, is it possible to have an Elastic Beanstalk instance for Tomcat7 with Oracle JDK?
I am hoping that it is simply a simple configuration change somewhere on the site.
How can can this be done?
You can install you preferred JDK and change the java linux link to it, so it'll be the default one.
Since EB instances are automatically created and destroyed by EB, you need to include a small script that instructs EB to make the required java change whenever it decides to spin up a new web instance.
Now to do that you need to need to write a conf file and place it in a .ebextensions folder. in that file you manually install java and replace it with the current one.
The formal (tiring) documentation about eb config files is here.
To get you up and running fast, check out this gist.
I have created a simple database application as a part of my college assignment. I have used Java (Eclipse IDE) and MySQL (command-line and phpMyAdmin) for the purpose of creating and using the database on a stand-alone application. The thing is that my database is stored on the localhost.
An easy way to make my application usable on another person's computer would be to convert it into an Executable JAR (since, I am using Java). However is there any way by means of which I can also install the database directly to the other person's computer (on the localhost)?
Something like an installer or so?
I read online that a simple thing would be to manually install MySQL and create the database. But I don't know PHP and typing the MySQL commands / using phpMyAdmin would be the only choice. But is there any better way to go about doing it?
Thanks for any help.
EDIT1:
I don't know if this helps but I have no previous knowledge regarding creating installers for projects. All I have done until now has been exported either as an executable JAR or as source code. I am still studying.
EDIT 2: Creating an installation for a java project <- is a similar question but it does not help my cause. It recommends not using MySQL. Our college has compulsorily asked us to use MySQL and nothing else. That is what they taught us and expect us to work only with it. Please help.
You don't need PHP here, so don't worry about not knowing it. PHP is just another programming language (a web-based interpreted one), and isn't going to help you install MySQL.
You should probably ask your instructor for assistance, because anything we come up with would be a guess about how they intend for your to operate, whereas they know and have done this before many times. That being said, we can make reasonable guesses toward helping you.
You could probably have one master MySQL installation that all your installed Java applications access. This is probably what you want, rather than installing the MySQL application on each individual computer. Your Java application then connects to your college's MySQL server rather than localhost. This requires configuring the MySQL server for remote access, but if that's what they want you to do they probably have already done so.
The other option is to have an installer that actually installs MySQL and runs a series of scripts to import the expected database structure. I can't imagine this is actually the intention, but there are many different installers that can help with this, and it depends how what platform you're developing for as to which automated installation tool might work best for you. You can, to a large degree, script the installation of the official source, so you may simply be able to tweak that once you find the customization options you need, then wrap that in a simple shell script which first installs MySQL then imports your database structure. I can't imagine this is what your school intends, but that's how you would do it if it were. That or Chef, Puppet, or your distribution's built-in package manager. Too many options to cover them all thoroughly here.
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We're having huge issues with Java Web Start in production. We're afraid to release because every time we do, help desk gets calls from 1/3 users getting an "unable to launch" error. It's hard to tell whether it's because of user error, cancellation in the middle of download, poor network connection or anything. But the bottom line is:
We find it terribly unreliable.
What are the alternatives for deploying and updating a rich Swing application? Either free or commercial, I'm more interested in features and robustness.
Reliability is key, but I would also like to have the following:
Install once, update automatically from a simple HTTP hosting like JWS
Differential updates
Support for multiple configurations (think of 30 instances which may have different versions of the application or different launch parameters - would be nice not to build 30 artifacts each time)
Win / Mac / Linux support. Hopefully one that does not mean I have to maintain 3 builds for each instance.
I feel your pain, the biggest issue I've had with JWS is visibility, that is, what is it doing and why is it doing it. Most of our issues were related to internal proxies (Java seems to really not like authenticating proxies) and the wrinkles seem to be ironed out for the moment. Nevertheless, I did consider simply writing a replacement. This is not as crazy as it sounds, JWS does an awful lot of stuff that I don't really care about, namely, integrating with the web browser and checking JVM versions. Consider the following scenario:
You launch a Java application (the launch app). This application takes a single parameter which is a URL of a JNLP file.
The launch app hashes the URL and uses this as the basis for a local folder (repository) in which to store any downloaded jars for the app. If the repository doesn't exist, it will create it.
The launch app attempts to download the JNLP pointed to by the URL. If it can't download it, it will just launch whatever is in the repository (maybe warning the user)
If it can download the JNLP, parse it and list any jars that need downloading. If you already have the jars, use something like Apache HttpClient in order to determine whether the server has a newer version and download if required. The important point is that any downloads should be stored in a temporary folder. Once ALL of the downloads have succeeded, you can apply these to the local repository. Ideally, you will back up what is already there in order to allow some sort of rollback procedure.
This should provide some very significant advantages over regular JNLP:
Visibility, you can log exactly what is happening
Much better failure modes: if the download gets interrupted just launch the version that's already there (obviously, this won't work if the interrption occurs on the first download), if you feel like telling the user about it then do so.
By running as a local app you should avoid running into issues with signing of jars, I honestly don't understand the Java Web Start security model with respect to signed jars but it seems that if different classloaders are involved, JWS will complain about it (I think)
Sadly, I'm not in a position to fire you over a working version of the above, I did start a prototype but suspended it. I may have to return to it in future in which case, I'll be happy to share the finished version.
Cheers,
Phil
Currently we are using GetDown to handle distribution of our swing applications. We use Tomcat to distribute updates and GetDown to download those updates. It's really flexible and powerful, and much better than java WebStart and because it produces check sum for changes it saves bandwith and downloads just changed files.
A good tutorial : http://www.hascode.com/2012/05/creating-updatable-java-applications-using-getdown-and-the-getdown-maven-plugin/
You could use an installer: for example Install4j.
You can find a list of installers here: What are good InstallAnywhere replacements for installing a Java EE application?
With Java Web Start being deprecated by Oracle, we are considering using Microsoft's .NET Click Once to download and launch our Java application.
We will have a Click Once .application file run a little MS program that detects Java, downloads our latest jar files and then launches our Java program using the detected version of Java and the Jar files.
Of course, this is only a solution for Windows machines, but we are customers are exclusively on Windows, so this works in that environment.
MS's Click Once: https://learn.microsoft.com/en-us/visualstudio/deployment/clickonce-security-and-deployment
You could also give Zero Install a try. It's cross platform (Linux, Win, Mac), offers jrd download and auto update and has a nice system integration.
Drawback in my eyes that its not easy to handle..
http://0install.net/
I am developing a web service in GWT which needs to be able to read and write files on the server.
Initially I was just going to dedicate a directory on the server which will be accessed via the GWT Server. However as this is deployed to Tomcat, I am unsure of the problems that could arise or if it is even possible.
I would like a way for the GWT application's server side to have access to a Subversion server. Where files generated on the fly in the GWT Client side are sent to the server, the file is created and commited to subversion. Therefore, should someone want this file (which is a configuration file) they can then have access to it again by checking it out, etc.
Is this possible? Subversion sounds like the ideal solution however I am unsure of the problems.
JavaHL is an official part of the Subversion project.
Here is a page describing the basic difference between JavaHL and SVNKit: http://help.collab.net/index.jsp?topic=/org.tigris.subclipse.doc/topics/faq_subclipse.html (click "What is an adapter? What is JavaHL?")
There are several Java librarys that provide an API to Subversion Servers. Several years ago I used one, but I can't recall its name, however SVNKit is a popular one.
We develop Java Web-aps (Websphere, DB2) which display graphical and databased information. We would also like to offer the same application offline (distribution via CD/DVD) with online data-update. We have tried a number of alternatives in the past, but nothing has been really stable. What are the new best practices to take a Web ap plus data (in a small database) offline?
I don't know how well it works with the CD/DVD distribution front, but the first thing that comes to mind is Gears. On the .NET side of the fence there's Silverlight 2. Then there's the Mozilla Prism project, although I don't know how far advanced that is.
These are all designed for not just offline access, but mixed offline/online, talking to a server when it's available and working locally when necessary.
I'd suggest using Apache Derby as the database (also available as Sun's Java DB, and possibly still IBM Cloudscape (does that still have DB2 compatibility in place?)).
I'm sure there's plenty of Web servers/Servlet containers about. Apache Tomcat is the obvious one. An alternative approach would be to use an embedded native browser within a single Java process. That approach should be relatively hassle free for users and tech support, and you can just use WebStart to install and update.
If you're using EJBs and other nonsense, then there are similar freebies about. I understand Sun Glassfish is nice and fast starting.
You could create an image of your server as a VMware instance and distribute it with a copy of VMware player (licensing allowing of course). Personally I'd build it on top of a Linux distribution like CentOS5.
You can bundle a JRE along with JETTY server and use a different database e.g HSQLDB (that you can bundle inside the webapp itself).
If you are using an ORM tool to connect to database, you might not have to make many code changes for this.
A lot of Application server distribute their admin consoles like this.For e.g Weblogic admin console runs offline (it uses internal ldap server for its database)
Also as far as Google gears is concerned, they are also pretty much doing the same thing.
They have a server that is bundled along with SQLDB and they allow to synchronize the data between online offline app.
You can sync the data too (use webservices in the online app) and talk over https from the offline app to sync the data, if you need the sync feature.
Also you can check this link
http://developers.sun.com/learning/javaoneonline/2007/pdf/TS-69700.pdf