When developing a Java EE 7 webapp (Win8, eclipse Kepler, JBoss Tools 4.1.1, wildfly8.0CR) I can use the application at localhost:8080/app/
But I wonder what to do, if I want an extern access to that app, e.g. from my other PC. What configuration is needed, or do you need a "real" server for such a purpose?
Thanks in advance
How public to you want your website to be?
If you want to access it from another computer on the same network(for example your home network) you need to adjust your network and firewall settings so that that you would have access from one computer to anoher on the same network. Then if on the computer that contains the app you would access it for example http://localhost:8080/myapp then on another network you would access it http://ip-of-the-comuter-that-contains-the-app:8080/.
If you would like to access it from outside the local network then the process is same, but a static IP would be recommended to the computer that contains the app.
If you would like the general public to use the app, then hosting it from your PC may not be such a good idea and somekind of server solution is adviseable. There are lots of different cloud solutions like http://aws.amazon.com/ec2/ or https://developers.google.com/appengine/ that would provide enough flexibility for majority of apps. Or you could ofcourse have your own server hardware, but this can turn out to be much more expensive to keep stable and secure.
For a quick-and-dirty solution you can choose the "Enable remote access" option on the server (double click the server, and you should see a check box in the server editor).
This will tell the server to start listening on all network interfaces and not just the local one.
btw. we only listen on local network interface by default for security reasons since we don't want you to unintentionally get hacked if a vulnerability is found and used by someone malicious.
Related
I'm working on a Project which aims to develop an app for a bloomberg anywhere subscriber. We have a Framework available, which we usually use to write our apps. These run ususally on a cloud as webapplications.
As apps using bloombergs open API can only run on the same machine as the subscriber is logged in biometrically, due to data acess restrictions and prohibition to distribute the data further, we plan to run our framework locally on the clients machine as a desktop application, in order to use the tools we are familiar with.
the back-end, which would use the bloomberg open api to get the data from the local interface provided by the local bloomberg-software, runs on a tomcat-server. the frontend is a javascript client, accessing the back end via API-calls locally.
My Questions are:
As bloomberg data-access is very restrictive, i'm wondering whether the bloomberg-interface accepts calls which come from a server software (like tomcat), even when running on the same machine an not used to distribute the data further?
Would set-up: framework running on a second machine (linux, its easyer to run there), calls Bloomberg Port on first machine via private local network, data not leaving second machine, be possible 1. technically and 2. legally?
Does anybody know that? Any advice highly appreciated, many thanks in advance!
I would like to be able to use a usb SmartCard reader/writer (NFC) using Flex but I cannot find out how to do it.
I know this approach does not seem the most secure, but I know that, for example, you can use with Flex a usb webcam if the users accepts to give that permission to the web application.
To give you a little background info about why I would need this: We have developped a web application which would be deployed in a local network of an enterprise and which server-side part is developped in java and which client side is developped in Flex. I have managed to use the reader/writer from the java part but that obviously is not practical as we can only use the tag reader/writer attached to the physical server. What we need is to be able to give the client the possibility to use the reader/writer connected to his PC.
If needed, I would have total access to the client machines (if I need to give the application any kind of special permissions).
Thanks in advance for any clue you could give me!
You can't do anything in native Air, which would be the runtime that would expose such an API. You can do a native system app (Windows or Mac) and that app leverages two processes that communicate with eachother.
The main process would spawn two processes
Air client
Smart Card Reader writer
So the main app would work as a HUB between the two.
Maybe it's worth to look at a FlashPlayer app that runs in the browser and communicates with a Java Applet via ExternalInterface.
I am interested in putting a chatting functionality as part of an application.
What I am interested in:
I would like to keep my application instances acting as peers, i.e.
I would prefer not to write also some server module to handle
message communications
I would like it to be able to use it with exising IM accounts. E.g.
someone can use it using his MSN account or any other client
account he may have, same way he would use MSN Messenger or Tor client etc
I googled and found that there are some Java MSN libraries available and also some other libraries that support IM e.g. SMACK for JABBER etc (not sure what that is) but I am not sure if the latter could be used for option 2 I mention.
My preference on 2 is because I assume that this way a user could do chat no matter where he is while in other solution I assume that some network infrastructure e.g. with routable IPs etc would be required. Am I wrong here?
Does anyone have expererience with Java IM libraries? Are for example any issues e.g. with different MSN versions or something?(Don't know if the protocol has been changing often to matter for me).
What would be the best path/option for my requirements?
I would go with a Jabber based approach. Jabber (also called XMPP) is an open protocol with lots of implementations and supports connecting to other IM services via transports. That way you would not have to deal with changes to the Windows Live protocols. You can rely on the open source community to provide that functionality for you.
Edit: It seems, that Windows Live even allows native XMPP access.
If you like, you can always set up your own Jabber server to provide a tighter integration with existing user accounts. In that case you wouldn't need to write the whole server.
I need to run a java application (not an applet or JNLP, but a full blown application in the JRE) and need some restrictions on:
File System - The app could only access 1 folder to read & write (this would be a fixed path for the app's reference like / )
Ports - The app could only access several local ports. (eg could only access port 8080 / 3306 only)
Is there a way to do this? I have searched through Java Security & Policies but came nothing close to a solution.
I am considering to write a container to run this app or changing / overriding the classes (in case of OpenJDK). Is this ok?
This is for an open source project that we are about to start, Appreciate some good advice from the wise StackExchange community.
regards
First and most basic, run the java application with a user who has the minimum permissions required for the app to do its work.
Secondly, set the java SecurityManager and configure it.
SJuan76 has the right answer here. The SecurityManager is the appropriate way to restrict files/directories a java app can access. This tutorial might be a good guide to setting that up.
You can restrict the ports your java app listens on. But restricting ports really requires an OS level firewall to be configured.
I am learning Java and am trying to do some experiments with networking Java programs.
I have a program made in 2 parts with a client and a server and it works in local testing but the program actually has usefulness for me and a friend of mine and I want to put the server online so both of us can connect to it and use it.
Where/How can I put the program online and have it running so that the client programs can connect to the ServerSocket with an ip address? (Preferably free)
If you dont want to pay server hosting then I would open a virtual server on my computer, then playaround with modem and forward related port to server ip. I would use a port more than 40000. Then just send your ip and port your friend or update application.
If you really want the application to go live within 5 mins, try Jelastic. If you have built a WAR file, simply sign up with their server,choose a provider closest to your geo location, configure Tomcat and you can upload the WAR file through their fantastic web console. Otherwise if you have some source control system(SVN,GIT etc), you just connect and build it with their Maven console and you can be ready. I used it for my start up(Cloudlabz) and really found it exciting.
Surya
You could also consider the cheapest Rackspace Cloud Server. You'll get a full fledged Linux server (distribution of your choice) for about USD 11/month. I've done that now and then myself to try things out.
Just install Java on it and you're good to go.
http://www.rackspace.com/cloud/cloud_hosting_products/servers/pricing/
http://ideone.com/
is that what you want for this?
This is a free web app for you to run your program online....so you can just paste your code and run it.
On the cloud you could use two different services in order to host your Java application.
IaaS (Infrastructure as a Service). Where you can just rent a specific infrastructure on the cloud and you could install and configure all the services that you need.
PaaS (Platform as a Service). In this case, you still enjoy the infrastructure on the cloud + the service Aaren full pre-configured. It means that you can deploy your application without installing or configuring anything. You just need to deploy your application. You have an example about how it works here. Also, you usually can test your Java apps on the cloud without paying.
You should host the server in Heroku ,they offer a free hosting with limits , I have an app there