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I'm conceptualising a new solution where in my first step, i need to centralize Data from different sources( Databases, Excel Files, CSV files...) into a temporary Database before starting my controles and batches, this will allow me to have a good starting point which will not be affected by the changes in my sources’ data, the question is what's the best solution for me, an ETL like Talend or Pentahoo , or a java based solution with a spring batch? thank you verry much for your answers
Check out AWS Glue. It is in preview stage now but you can sign up for access. Once there you can manage everything in their cloud for free for a long time. https://aws.amazon.com/glue/
Talend (or Pentaho) gives you all the necessary components to do what you want with very limited hand coding.
On the other side, if you want to do everything by yourself...
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I am designing an app. I want to know store some metrics about my app in free cloud database. The metrics includes which functionality users using more, number of downloads, user preferences etc. Later, I would like to query this database to understand app metrics.
I googled and found there are some free database hosting services like FireBase, Buddy. I am not sure which one to choose for my use case. Any suggestions?
I know this is not a programming question but its a design requirement I want to make, and if it not the correct place to ask, atleast route me to correct path instead of simply closing or down voting.
I found answer to my question finally! It is Google Analytics.
Simple and easier to configure and use. Still exploring :-)
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I would like to create CMS in JavaEE. I want use graph database. Which graph database is good for this purpose? What do you recommend? I seek free/open source graph database.
I can personally encourage you to use neo4j - http://neo4j.com/. It's new, quite simple, easy to use on Java and has quite good documentation. Although be aware of some minor issues (like an application crashing occasionaly when used heavily).
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I want to develop a small application in JAVA, for personal use, that solves the derivatives and integrals. Can you tell me some good library to do this, and some example?
Thanks
Commons Math contains the ability to integrate using different methods - see here, section 4.5. The example here shows you how to use the TrapezoidIntegrator, the others work pretty much in the same way.
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Library reference hosted on google code.You can also use JLink with Mathematica to send your calculations part to mathematica and get appropriate results back.
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Is there any Java opensource to create flow charts not within the IDE itself, but in a web based application so they can be viewed on a browser? This is like a Cost Control Flowchart, but basically a flow chart.
To avoid any confusion, the business requirement is to allow users to create flow charts and save them to databases. I am not looking to create UMLs of source code or vice versa.
This stackoverflow question points to the right directions but I need to be able to have users draw and then save the drawing/information to the database. Flowchart is the only UML required.
If it does not need to be "web-based" then yEd Graph Editor could be a good choice.
yEd is a free desktop application that can generate high-quality diagrams, either manually, or by importing external data.
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I'm looking for an open source, Java-based database that ...
can be easily extended, e.g. by implementing various forms of trees (R-tree, etc.), various indexing techniques (BitMatrix, etc.), new operations and fields
does a good (fast) job at reading data, e.g. for reading time series
is well documented
I looked at (in other threads suggested) Apache Derby and BerkleyDB already; at the moment I'm in favor of BerkleyDB since it seems to be faster than Derby. Do you have any further preferences or any arguments for or against a database.
I never tried to extend it but H2 database seems to be one of the most flexible and vibrant projects at this time.
It uses interfaces in many places which makes it simple to drop in your own implementation, for example for custom tables.