Im Trying to use CouchDb as a NoSQL database and my main purpose is to create an application on android which use couchDB instead of sqlite! And I want to use this database locally , so with no server connection!
I have seen that you need to buy this on android market to use it! I'm wondering if I'm going to use this should all the users of my application by couchDB first in android market to be able to use my application?
or somehow it will be included? How does this thing work? Is there anyway that I can skip buying it and include this technology in my own application?
And please let me know if there is some other NoSQL that I can use on android!
Thanks for your help in advance.
I don't think you need to purchse it to use it, as it is an open source library covered by the Apache license.
Speaking of NoSQL I've successfully used both NeoDatis and db4o in the Android environment. Both of these libraries are object databases and are surprisingly fast and easy to use. In fact, the claim is that they are faster than ORM/Relation Databases. I think they are a great fit for a low-user (1 user) low bandwidth environment.
Here's an example of db4o in Android:
http://java.dzone.com/articles/using-db4o-android-application
By the way, db4o is open source, but GPL, which makes it a difficult license to integrate into non-GPL products. They also have a pay-license version.
You probably want to look at https://github.com/couchbaselabs/TouchDB-Android
This is an embeddable Java library that wraps SQLite, so it is fast, native, and lightweight.
It syncs with Apache CouchDB so it has the offline mode you want. It also has a REST/JSON api very similar to CouchDB.
Enjoy!
Related
I am new to multi-device development in Delphi and I have a basic VCL background. I have worked with multiple projects that use locally stored databases for their functions etc.
Coding is a hobby and I want to learn more about mobile app development for personal usage. I am busy writing a simple application that serves as a scoring system for a card game that we invented. I am currently using SQLite local database to store data.
I am now looking for a way to have a single database that multiple devices can access so that any one of our android smartphones can run the application and interact with the data in that database.
At this stage, I don't really have extensive knowledge about what I am talking about and I want some advice regarding this problem. Is a single database the best solution? Is there perhaps a different approach?
I am familiar with basic FireDac syntax (TFDConnection, TFDQuery, and TFDTable), so I would prefer maybe keeping a FireDac infrastructure if possible.
I would prefer the solution to not be too complicated :)
I do hope that I presented the problem clearly. Please ask if something sounds unclear - I will try my best to elaborate.
I am using Delphi 10.3 (Community Edition)
There are many solutions to this problem. I won't expose all possibles but only the one I think is best:
You need a server somewhere in the cloud to keep data from different devices and you have to make your application communicate with that server. You can build server side with Delphi, or other tool.
I recommend a REST architecture over HTTPS using JSON format to send/receive data to/from devices.
Delphi has everything required to build both client (Your devices) and server side. Not sure for Community Edition. If not included in CE, you may use third party libraries to accomplish the same task.
You next step is to think about that solution, do some research by yourself, write some code and when you are stuck, ask another question on StackOverflow.
I am working on a RSS reader application. And I need to find a backend database. I want the database be embedded because I don't want the users to install a database server.
I know SQLite is a good choice, but I am wondering if there are any other nosql choices?
(I don't yet have 50 rep points to comment on, and build upon, the accepted answer; otherwise I would, sorry!)
You can embed MongoDB in your OEM solution but there are two things to consider:
It is written in C++, so if you are coding in a different language you might need to write a wrapper that launchers the database process separately.
MongoDB is licensed under Gnu AGPL-3.0 which is a copy left server license. The accepted answer, and the Google group quote, both correctly state that this would normally force you to also be AGPL licensed. However, they MongoDb states that the intention of the license is to allow refinements to their code to be submitted back, and that your product will remain separate. This makes me think that the normal copy left rules don't apply.
The goal of the server license is to require that enhancements to MongoDB be released to the community. Traditional GPL often does not achieve this anymore as a huge amount of software runs in the cloud. For example, Google has no obligation to release their improvements to the MySQL kernel – if they do they are being nice.
To make the above practical, we promise that your client application which uses the database is a separate work. To facilitate this, the mongodb.org supported drivers (the part you link with your application) are released under Apache license, which is copyleft free. Note: if you would like a signed letter asserting the above promise please request via email.
Source: http://www.mongodb.org/display/DOCS/Licensing
According to the Google Group, yes it can, but it doesn't cover how exactly.
Yes, but it isn't pretty and will
force your app to be AGPL licensed. If
you are interested take a look at how
the tools handle the --dbpath option.
Source: http://groups.google.com/group/mongodb-user/browse_thread/thread/463956a93d3fb734?pli=1
If you're using .NET, one option might be RavenDB, which is a document database, and can be embedded.
Please checkout https://github.com/Softmotions/ejdb
This project being developed to resolve this issue.
How about Couchbase Lite? It's an open source, embeddable document database. While it can function as a standalone document database, its real value is in its ability to synchronize with remote document databases. It may be aimed at iOS / Android, but it can run on anything with a JVM.
https://github.com/couchbase/couchbase-lite-java
There is no straight forwarding way to use MongoDB as an embedded library in terms of a well-reusable library. Eliot - head of 10gen - spoke of "it would be nice to have one" - but there is nothing available that could be reused in a sane way.
Looks like a lot of OEMs are trying to get Mongo on to their hardware and devices for real-time processing. A link from MongoDBs website
I usually use Buildroot to create a cross-compiled Embedded Linux root file-system along with all the user space packages.
I noticed that MongoDB is one of the packages that's already integrated as one of the Buildroot builtin packages.
You may check out MongoDB make file for some hints regarding how to built it for Embedded Linux.
My client has Joomla website with plugins (Mosets tree and JSE events) that basically lists business an events. He wants an android app developed to fetch these info. Immidiately what came to mind, is I create php scripts that query the Database and I call those scripts from my app. In my app, I display the information collected.
Another idea that occurred to me, is to enable RSS feed and then I read this RSS feed.
Is my approach above the right approach? Is there a different way or standard way when developing apps that fetch information from the Joomla website backend?
Please note the website is already mobile friendly but the requirement is to create an app for part of the website. Any pointers are helpful
Building one or more PHP scripts that query the db and returns the data is definitely the faster and simpler solution.
If you want to build a more robust / compatible solution, you may extend your set of PHP scripts into a full blown REST API application. In that case take a look frameworks like SLIM or SILEX which are very good at this.
There are more complete and elegant solutions but they are probably overkill for your needs.
Edit: why query directly the database
In theory, it seems to be better to NOT access directly the database, and interact with the Mosets Tree component instead; because in that way you will not have to duplicate any logic.
But in my experience, with a very few exceptions, Joomla components are coded so that it's very hard to interact with them programmatically.
I answered a similar question regarding Joomla RESTful APIs here:
REST API for Joomla 3.0
Basically, I ended up developing a solution which meshes the Slim PHP micro-framework with the Joomla Framework / CMS (requires Joomla 3.4.3+).
Why?
Well, the main reason is that while using the Slim framework would be OK as a one-off solution, I realized that one would still need to develop all the accompanying ACL and access security, not to mention the actual CMS that might store and manage all the important data in the first place.
Basically, I did the work so you don't have to. Yes, it's a commercial component (must pay to download) but I think it's WELL worth it for what you end up getting out of it.
It's brand new, so the service routes in the cAPI ("Constant API") Core package are still limited, but those are being built-out over time (all included in the core package of course). The component/plugin/library package is architected to allow for easy integration of add-on plugins which will introduce new service routes to add functionality like RESTful JSON APIs for MySQL, MSSQL, MongoDB, LDAP, etc. I already use an alpha version of the LDAP add-on in a an enterprise environment, so I expect that to be available for purchase/download soon.
The point of all this is that you can use an existing Joomla site to drive mobile apps (with some development for Mosets), while taking advantage of built-in user management and ACL, along with token auth (via cAPI).
Let me know if you have any questions.
I want to develop a application where part of the data is dynamic like picture , show timing etc.Their are many content management system that use HTML5 and CSS but i want to also use the native iOS or Android Ui like the UISplitView for iPad.How is this possible ? whats the best way to manage and use dynamic data ?
I have been digging into this very exact answer. The best answer I can come up with is called parse.com. Which may not be 100% of what you are looking for. However. What it does is serve as a central database that talks to multiple platforms(windows 8, iOS, Android) and offers up an api for use with every platform with lots of documentation to make programming super easy. http://deployd.com/ also This site is something Ill be looking into which uses a simplified node.js desktop for programming easy objective based functions with a database. Definitely am still looking. Either way the bast thing is to call your view...bring in a few objects...and have these databases feed your objects to specifically answer your question.
As a developer Im used to Joomla and magento. These arent necessarily ios friendly. Anyway, best of luck.
I'd suggest taking a look at Cloud CMS (http://www.cloudcms.com).
Cloud CMS is a cloud content management system that is built around JSON schema. Unlike traditional web content systems, Cloud CMS works with JSON and binary files (either through MongoDB GridFS or Amazon S3). It provides full-text search, structured query and an entire suite of enterprise features for things like workflow, analytics, users and groups and more.
From an iOS or Android viewpoint, you really only need to interact with the REST API. You can do that directly or use one of the client libraries.
Disclaimer: I'm one of the founders of the company. Would love to find out what you think and learn what we can do to improve things. We're having a great time reinventing CMS for mobile.
Local DB always sync to remote server sounds a great idea, because you get the responsiveness for using local DB, but also get sync crossing devices.
But can anybody talk about their experiences with couchbase on Android?
https://github.com/couchbase/Android-Couchbase/
What are other options out there? Cloudant?
Look at Touch-DB Android. It's more compact than Android-Couchbase and is still regularly updated and maintained (I believe the main contributor is working on a big release, which is why the last update we two months ago). The framework is built on top of Ektorp and emulates a CouchDB database on your Android device.
Replication to and from a remote database is fairly intuitive and easy to set-up.
I use CloudAnt as my remote back end for my Android game.
I can tell you that in general, it works. e.g. I have an android app that syncs with iriscouch.com. But you might want to ask a more specific question.
iBoxDB is another option. It is a lightweight database for java. You can customize replication.
https://github.com/iboxdb/forjava