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I have a Java application. I can expose it using web services or REST (JAX-WS or JAX-RS).
Now I actually want to run it "in a cloud" and expose it as a service. I have read around that there are services e.g. Apigee, Rackspace, Google App Engine... The idea is that I don't want to worry about scale and performance. I want that handled by the host.
What are the options for Java?
Thanks,
David.
After a bit of homework, here's what I am gathering:
This is really about Java PaaS offerings (platform as a service).
In addition to what I previously mentioned,
Google App Engine
Rackspace
Apigee
it's worth adding:
Jelastic
CloudBees
There's also a guide - albeit old - from InfoQ that can be read here.
Depends on amount of money you can spend.
This cloud hosting seems interesting.
There's Heroku too, or even AWS.
Amazon AWS provides auto-scaling features that you can configure so you don't have to "worry about scale" day to day, though you do have to set it up in the first place (you will also have to monitor your bill in case you are scaling big-time ;) ). It works well and provides decent monitoring/visualization if you are happy to do the set up.
I can't say whatthe other systems you are investigating have to offer in terms of automatic scaling though.
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Is there a way to find an online Hadoop database and practice on it using Java?
I found that you can practice on www.gethue.com, but I don't think you can do it using java.
Thank you
You can try Cloudera Live.
It's in beta, but seems to work pretty well.
I made a small list of free offers enabling you to manage your own hadoop cluster. It's not technically an available database, but you can fill these clusters with the data you want.
Here is the list :
Microsoft Azure HDInsight : they offer you 150€ to spend on their products. You can rent a Hadoop cluster and work on it.
Qubole : they give you preconfigured Hadoop clusters, you have 75 computing hours for free
Joyent : you can have one VM for free for a year.
You may also try amazon's Elastic Map Reduce, although I'm not sure this specific offer is included in their free trial. An advantage of using it is you can access free datasets more easily (for instance, this one).
Please also note that all these services (except Qubole) require a credit card for registration.
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I want to start on a new project regarding screen recording from web browsers, probably using a plugin or something similar (if it is possible). Basically I need a web interface from where the user runs something like a plugin, select the area where the screencast should be, press the record button, talk for maximum 5 minutes then the video should be uploaded to my server for further review. (I am doing this for a school project where the students/users use this max 5min videos to tell the teacher about an issue/problem etc.). I've researched (Google it :D) about different methods that I can use. I am a student aswell and I have a limited amount of programming knowledge mostly with python, html, css, javascript, objective c & php but I am more then glad to learn something new if is required. I've found an open-source plugin called ScreenBird
https://github.com/adamhub/screenbird
This is what I need but it requires from what I know a Python Server (correct me if I am wrong) which I don't have from the school. I can work only on a Apache server from where my issue, otherwise the ScreenBord should be enough. I don't want to go so much into programming the plugin because I want to work on the design of the website mostly for a better presentation. I really want to start working on this as soon as possible but now I am stuck on what tool to use and that's why I am writing this question: What is the best web-based screen recorder plugin for my needs?
For the Screen Installation instructions are given here: https://github.com/adamhub/screenbird/blob/master/README.md
I don't think you need a python server. You just need python installed.
You should be able to run it on localhost and local network, if you don't need it on the internet. Buying hosting for a python server might be useful in this case, its not too expensive :http://www.whoishostingthis.com/compare/python/#
You didn't mention what type of server you have access to, default could mean anything (Apache, IIS, TomCat etc)
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I am considering building a Java EE based set of services and licensing these services to my clients. While we will aim to make these services generic for any client, reality is that customizations and new services will be needed on a client specific basis.
Likely the stack will be a Java application deployed to the EC2 cloud, possibly leveraging a framework such as Spring.
What architecture would one prescribe to have a hosted application for my clients, but also enable them to build their own custom extensions. Does anyone have technical or business example of a company that has built a hosted SaaS service that is extensible on the platform side?
I haven't done this yet, but AFAIK you could use module systems such as OSGi also on the server side to write modular, extensible server side applications.
Atlassian does this. You basically pay to have even its own source code, as well as a Platform SDK, or even a Managed Instance (this one, however, seems not extensible)
Internally, most of them rely in an OSGi Container (I think its Felix), so it manages dependencies accordingly, as well as DI and Extension Points. Perhaps might be worth it to have a try
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I'm working on an open source anonymous decentralized P2P application that will support Twitter-like functionality, you can read more here.
My intention is that the UI will emulate the Twitter UI quite closely, and be accessible through a web-browser communicating with the local app.
I'm therefore looking for a lightweight embeddable web app framework that supports comet (ie. server-initiated modifications to the DOM). It must be lightweight because I need to keep the size of the eventual application as small as possible.
My intention is that most of the UI work will be handled within the web browser, making use of JQuery, and perhaps using Coffeescript instead of Javascript (although I haven't yet made a full decision on this).
Can anyone recommend (GPL compatible) tools/libraries/frameworks for me to look at?
Not sure if you are still working on this since the git activity on the project page is pretty stale. But if you are I would recommend Jetty for your embeddable web app server. It is:
Small
Embeddable
Supports Cometd
Supports Servlets
Throw Vaadin on there for a small, lightweight web development framework and you are g2g.
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What is the best open source java workflow framework (e.g. OSWorkflow, jBPM, XFlow etc.)?
Here's an article that compares kBPM, OpenWFE, and Enhydra Shark that looks like it has some good, thorough info.
It depends what kind of initial investment you want to make. jBPM is the best in terms of features and flexibility, but OSWorkflow is a more lightweight, easier to get up and running and has with a smaller learning curve.
Drools Flow is the best workflow solution that I came across recently. It has a luxury to be better than other solutions, since it is built and designed recently, and based on lessons learned from other long existing, somewhat over engineered frameworks.
Drools Flow comes as a community project along with an official Drools 5 release that besides Flow includes: Guvnor, Expert and Fusion.
Unfortunately Drools Flow does not have an official Red Hat support contract yet, and that is a stopper for some big corporations to consider it. One might think the support is not there for political reasons due to the jBPM project living under same support roof.
I'll cast a vote for jBPM. We used it on a larg-ish ETL platform in-house and it seemed to work quite well. I don't have anything to compare it to, however.
YAWL - Yet another workflow Language
http://en.wikipedia.org/wiki/YAWL