I have created a website running on eclipse and tomcat. What is the way to make this website running online for real?? I have developed it, adding filters and sessions and using a database. I want to allow people to use this website. What I have to do?
You need to publically expose your computer and the port you set up.
If your application runs locally, it must be able to be hit by the outside world.
Make sure the tomcat config is setup correctly and ensure port forwarding on your router or modem is setup. Your public IP (available if you google whats my ip) and the port is all your users would need.
In my web app I am running an org.apache.solr.client.solrj.embedded.EmbeddedSolrServer
for debugging purposes I would like to access the admin interface.
This is how I instantiate the server:
new EmbeddedSolrServer(new CoreContainer.Initializer().initialize(), "");
Is there a way to open the admin interface of this embedded server like so?
http://localhost:<defaultport>/admin
If so which port would I have to use (what is the default port)?
Else is there a setting that I use to specify the web path for accessing the admin UI?
No, there isn't. At least, not while your application is running.
The embedded solr server reads and writes the index directly on your filesystem in your solr install directory. To access the admin console, shut down your app. In a console navigate to your /example in your solr install directory. Type java -jar start.jar. Then, you can navigate to http://localhost:8983/solr
to access the admin directory.
You can not have your solr server running and be running an application that accesses the same index via EmbeddedSolrServer or you will get a LockObtainFailedException. Solr only allows one reader/writer per index at a time, and that reader/writer obtains a 'lock' in order to access the index. This prevents the index from becoming corrupted from multiple simultaneous reads/writes.
For that reason, I prefer to use the HttpSolrServer instead of the EmbeddedSolrServer, even for a development environment.
See:
http://wiki.apache.org/solr/Solrj#EmbeddedSolrServer
Yes you can, just use reditect tricks
redirect the url you want
http://localhost:/admin
to solr admin url
http://localhost:8983/solr
What steps should I take to correctly deploy Playframework 2.1.1 website on production server?
More specific questions:
1) Should I install Play on my production server?
2) Locally it is clear to use play run but in production I need to run it 24/7 and restart it again if server has been restarted. How this works? Some outostart or something?
3) How to deploy it on Ubuntu 12.04(Apache2) server on mydomain.com(port 80)?
4) What configuration settings should I change/add for production to disable debug etc.?
I would really appreciate information about default deployment workflow for Playframework 2.1.1
First create a deployable version of your project using play clean compile dist.
The documentation recommends play clean compile stage but the dist command generates a nice ZIP file and does basically the same things.
You then load that file onto your server and extract it to the desired folder. Now start the Play server with the start file Play created for you.
Play defaults to TCP port 9000 as it does in debug mode but you can change that by using the option -Dhttp.port=80. Listening on a specific IP address can be done via -Dhttp.address=127.0.0.1.
But the thing I do is using an nginx as a reverse proxy to control things link GZIP compression and to listen on a specific hostname. Just search the web for more details about reverse proxies.
You should have an own configuration file for your production use because you need to turn off evolutions, change the database server, and maybe some other stuff you added during development. More about the production configuration can be found in the docs.
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
I want to place a server program written in Java on the cloud. It would accept TCP socket connections from clients (clients are android phones using 3G), do some computations, save stuff to a MySQL database (also on EC2), and send stuff back to the clients over the TCP connections. It may even be necessary to create several instances of the server (i.e. a process group).
Is this easy to do? I think I can make a AMI, but I'm not sure how to upload Java files, compile and run them, and create a MySQL database etc
Any help would be much appreciated.
Take a look at using Amazon Elastic Beanstalk. Beanstalk is Amazon's PaaS offering and it will alleviate a lot of the system administration burden. Here's a quick description from their docs:
AWS Elastic Beanstalk is an even
easier way for you to quickly deploy
and manage applications in the AWS
cloud. You simply upload your
application, and Elastic Beanstalk
automatically handles the deployment
details of capacity provisioning, load
balancing, auto-scaling, and
application health monitoring.
Also, if you're interested in using MySQL then you should look at Amazon RDS. Again, this will alleviate the system administration burden for your database tier. Here's a quick description from their docs:
Amazon Relational Database Service
(Amazon RDS) is a web service that
makes it easy to set up, operate, and
scale a relational database in the
cloud. It provides cost-efficient and
resizable capacity while managing
time-consuming database administration
tasks, freeing you up to focus on your
applications and business.
Is this easy to do? I think I can make
a AMI, ...
I think the answer depends on how comfortable you are with system administration in general. Creating a AMI to run in EC2 is really pretty much the same as creating a physical server or a VM image. You'll need to install an operating system, and then install tools, libraries and programs you need (like mysql, the jdk, ssh, etc).
You can save yourself a little work by using one of Amazon's pre-built AMI's http://aws.amazon.com/amis/. But, ultimately, you'll be responsible for all system administration of the server. If you've never built a server from the ground up, you have a pretty big learning curve ahead of you. It's not insurmountable, but just be warned that the devil is in the details; there's a ton of stuff you'll need to learn ;-)
... but I'm not sure how to upload Java
files, compile and run them, ...
Once the server is setup and running in EC2, compiling them and running java files is just the same as compiling and running on your local. Normally, you probably want to compile and package your java app into a jar or war and then transfer that up to your EC2 server. If you install linux os on your EC2 server, you can use scp or a FTP client to transfer your files over sftp to move the files from your local up to the server. Once the latest files are up on your server, you can ssh to the server and start your app.
... and create a MySQL database etc ...
Installing mysql is going to be specific to the OS you choose to install on your server. For example, you can install mysql easily on Ubuntu with a command like:
sudo aptitude install mysql
Again, there will be more system-admin-type stuff to learn here specific to mysql databases.
So, it's definitely doable. An experienced sys admin could build a AMI instance pretty easily/quickly. If this is your first experience with system administration, I'd suggest finding an old Desktop you have lying around and try installing Ubuntu and all the required libraries and tools you need (mysql, jdk, ssh, etc..). Get your java program working on the old desktop and then it should be pretty easy to create an AMI from that. Then you can run your custom AMI on EC2 and will be set up.
If you don't have a spare desktop lying around, you can use one of the Virtual Machine products like VMWare Player or Sun's VirtualBox and build a server instance on one of those.
If you want to avoid the hassle of managing the entire install of the Operating system, you might want to look at services like slicehost and/or linode instead of EC2. They give you ssh access to a pre-installed server. And it's as easy as clicking a button to install programs like mysql, etc.
Hope this answer is relevant and helpful, good luck.
- Dave
If you can use Tomcat as your server - you might want to try Amazon Web Services Elastic Beanstalk It will greatly simplify your task by providing an easy instance of Tomcat to deploy.
EDIT: AWS has a full section on how to develop using Java here: http://aws.amazon.com/java/
How comfortable are you with remote administering a server and solving problems most people have never heard of? That's what you're talking about.
You'll create your EC2 instance, log into it and configure it like you would any other server you're working with. You can download JDKs to it, dbs etc. You might consider using a tool like Chef to help you. You'll use ftp and scp to copy files to the server.
You're probably going to want your Java server on one box and have it talk to a separate db server since you say you may want multiple servers.
Once the server is working the way you like it you can create an image of it to use to launch multiple instances, then configure a load balancer to point at your servers.
If you can create a MySql db on your local box you can create it in the cloud. If not?....
Running Applications needs app. s/w to run them.
Apps such as Cyber Duck helps to upload files via SFTP.
I am successful in doing the same problem addressed.. Trust me, YOU CAN DO IT. All u need is interfaces for server services such as MySQL (use WorkBench to connect using key pair), terminal access (using PUTTY/SSH via MAC) and well you are good to go
I think to get started is to use a a whole unit packed into one archive.
Think of it as you have your Java files compiled, a embedded http server say tomcat. Now all of this packed in a jar ready to be deployed on Amazon's EC2. Use this link for more on embedded servers and relevant code.
As far as database is concerned, you can use Amazon's RDS. You can configure mysql on RDS and obtain a link to it for connection. Amazon RDS would help you to get started with database.
Now that you have everything ready to start and work with application. Now is the time to deploy on Amazon AMI
Perform Following steps to deploy you app on Amazon EC2:
Create a server instance on Amazon EC2 refer EC2 getting started.
Receive Private key file i.e. .pem(receive from Step 1), this file would help you to login to your server instance and perform SFTP.
Use Putty or similar SSH client to login to your EC2 server instance created on Step-1 using .pem file and server's public DNS, refer Accessing Instance for SSH login.
Transfer the archived files packed into jar to server using SFTP client, WinnSCP being one such client, refer SFTP for more on it.
Run application. Note in case of jar file you can simply fire java -jar TomcatApp.jar.
If everything is configured properly you would be to access the app using EC2 instance's public DNS or public IP, which would be of the form:
http://<public_dns_address>:<port number>/servlet
Hope it helps you to get started and provide you an overall view.