I want to interact with remote Neo4j server 2.0 version from Eclipse Java program. Can some one tell me,what tools and libraries do I need to achieve this.
Please note that it need to interact with remote DB server and not the embedded Noe4j. Please advise.
Check out the Neo4j JDBC driver. That should work best for your purposes:
https://github.com/neo4j-contrib/neo4j-jdbc/tree/2.0
If you've worked with a JDBC driver before it should be as easy. Just make sure to use parametrized PreparedStatement for your queries.
There are a few other options as well:
The native Neo4j REST API. Docs are here: http://docs.neo4j.org/chunked/stable/rest-api.html and an example is here: https://github.com/jimwebber/neo4j-tutorial/blob/master/src/koan/java/org/neo4j/tutorial/advanced/BasicRestApiFormerlyKoan10.java (check out the entire Koan project; it's a fantastic way to get really familiar with Neo4j's Java libs). The example makes use of a Jersey client to call out to the Neo4j server.
https://github.com/neo4j/java-rest-binding - The URL should speak for itself. There are tags for Neo4j 2.0 as well. This binding essentially wraps the above in a nice, neat package. Beats having to write your own wrapper.
Spring Data for Neo4j (http://projects.spring.io/spring-data-neo4j/). If you're using Spring in your Java development, this is definitely worth a look. The update for Neo4j 2.0 just came out a few weeks ago and should be ready for production very soon. There are pros and cons to using SDN, but, it's super easy to use, especially if you don't need anything overly complicated.
Hope this helps!
Related
My company has a product that we sell as a solution to mediocre firms, they are ok with using java but they have different opinions on db due to licensing and other technical/resource issues.
I was wondering if there is a way i can create the app in such a way that during installation we configure the database (select weather mysql/oracle and input/generate connection strings, allocate driver, e.t.c.) and it works similarly as the other db. I have heard about hibernate being able to generate table but havent ever worked on it before.
I need an opinion and if possible reference to a guide. thank you in advanced. sorry for a stupid question, i only know basics of java, haven't yet worked on ORM or any other framework.
Yes,
The JPA (java persistance API) allows you to do what you're looking for. You will be needing a JPA provider (such as hibernate, Apache OpenJPA or eclipse link among others).
You will be able to automatically create the schema of your database according to the objects you need to map into it.
Here are few links to get started:
https://docs.oracle.com/javaee/6/tutorial/doc/bnbpz.html
https://www.tutorialspoint.com/jpa/
http://www.oracle.com/webfolder/technetwork/tutorials/obe/java/SettingUpJPA/SettingUpJPA.htm
Many JPA ressources will point to java ee ressources and tutorials, since it is heavily used with java entreprise edition, but the API itself can be used with the standard java platform.
Can anyone recommend a good way to create scripts in java that will work with an older Cassandra 1.0.10 database? I'm having trouble finding stuff online. Is thrift a type of driver?
Thanks!
Apache Thrift is way to connect to the Cassandra RPC server 1).
In the Cassandra source three there is a file /interface/cassandra.thrift which is an interface description file (IDL) that can be fed to the Apache Thrift compiler in order to generate Java code. By means of this Java code you will be able to access Cassandra. The whole process is described in more detail in the Cassandra wiki.
However, it is recommended to use a more high-level client library instead, because the raw Cassandra API is quite complex. You'll find the existing libraries, such as Hector, much more handy for your task.
1) Some more details about Thrift can be found in this answer.
Some years ago I made a Swing application that uses a MySQL database. Now I must change this app to work through Internet.
I can connect directly to a MySQL server through Internet, but I think that it's insecure, so I'm thinking about using webservices.
I know I must change lots of code in my current application, and I don't worry about that. But my problem is that I have never used webservices nor server side technologies in Java, and I don't know where to start.
Do you know any good "webservices for dummies" tutorial? I need authentication (and ACL or similar) and database access.
Thank you!
Easiest adaptation: have a look at apache axis2, it has everything you need for webservices. That would offer to extend you current applicatino by webservices functionality.
If you need to re-engineer everything, either spring or Java EE should be your friend.
Adding web services won't make it any more secure. The best you can do is to enable SSL with JDBC.
Take a look at the core servlets site. There is an EJB tutorial and an AXIS tutorial. As mentioned by Andreas_D, spring and Java EE are both options. I suspect you want a simple REST implementation, in which case, spring is a good option.
I am embarking on a new RIA project with Java on the backend. I'm the only developer, and the app is a line-of-business application. My current stack looks like this:
MySQL || Spring(JdbcTemplate for data access) || BlazeDS (remoting) || Flex(Cairngorm)
My question is: what changes can I make to improve productivity? Manually coding SQL, server-side entity objects, client-side value objects and all the Cairngorm stuff is obviously a drag, but I'm not sure what higher-level frameworks to introduce.
What Flex/Java stack has served you well?
Manually coding SQL
Hibernate is an option to cut this out.
One thing that may be of interest is Grails with the available Flex Plugin. It's built on Spring, Hibernate and BlazeDS, so it's all there for you. It was unbelieveably easy to get it remoting stored objects and responding to AMF calls. I was using this and then moved over to a RESTful E4X implementation as I found it a lot easier to debug and tweak as I could inspect the server output in a browser and have tighter control over exactly what I returned to my Flex app (lazy loading problems in collections using BlazeDS were a headache at times).
Here is a quick tutorial showing how easy the whole Grails + Flex Plugin stack is: BlazeDS in Grails
I would seriously reconsider using Cairngorm. In my opinion it's a pretty bloated framework that introduces a lot of abstraction you'll never use. Check out:
http://code.google.com/p/swizframework
http://www.spicefactory.org
Both introduce the concept of dependency-injection into your Flex app.
Also +1 for Hibernate. I would use the standard JPA annotations on a Java class and extend that with Hibernate Annotations as you find you need additional functionality.
Check out springsource.org's new Spring BlazeDS Integration Project
Spring BlazeDS Integration is a new
addition to the Spring portfolio, and
a component of the complete Spring Web
stack. This project's purpose is to
make it easier to build Spring-powered
Rich Internet Applications using Adobe
Flex as the front-end client. It aims
to achieve this purpose by providing
first-class support for using the open
source Adobe BlazeDS project and its
powerful remoting and messaging
facilities in combination with the
familiar Spring programming model.
As alternative to hand-coding sql, aside from hibernate, you might wanna consider JPA/Toplink. And since you are already from a Spring camp, check out Spring ActionScript (formerly known as Prana), it's an IOC framework for Flex. It solves many inherent problems in Cairngorm. Also a good IDE that supports Flex/Actionscript like IntelliJ IDEA 8.
Whats missing between Flex and BlazeDS is, it doesnt have any sort of landing page where you have a listing of all the available services by just typing a url on the browser (similar to webservice endpoint).
You can try GraniteDS. It's an alternative to BlazeDS, with an actionScript generator, Spring integration (an Spring security), and if you use an JPA implementation, help you with the Lazy Initialization (in a transparent way).
I am looking for some advice on what should I concentrate my efforts to get the needed skills to become a Java developer for Oracle applications. I'm bit confused as there are lot of technologies in the Java world. Where should I start? What to avoid? Is JDeveloper a good IDE for a beginner?
You're question is a little bit too vague in order to give a proper answer...
If you plan to query the Oracle Database from an External Java Program (Either within a Swing Application or an Application Server) then you need to learn 2 core APIs:
JDBC (Java Database Connectivity)
JPA (Java Persistence API)
JDBC is the core API that allows a Java Program to interact with any RDBMS so you should at least know how it works so whenever you have to dig into low-level code, you will actually know what's happening.
JPA is the latest Java API for Persistence which basically allows one to map Plain Old Java Object (AKA PoJo) to RDBMS Table Structures. There are multiple known implementation available but I would recommend Hibernate or TopLink as good starting points.
After that, you can start to dig into other known frameworks like the Spring Framework for some other RDBMS related APIs.
To become an Oracle Developer there is a bit more to learn than jdbc. You should take a look at the Oracle web site. It is kind of slow and not very intuitive but has a lot of good information. There are OUGs that have good info as well.
If you just want to access Oracle via JAVA then you should use a framework such as Spring. Takes away the pain of jdbc. Lets you write sql and map it to objects.
If you don't know PL/SQL it might be good to learn what it is.
My two cents from working with Oracle for the past 7 yrs.
You should be able to do everything related to Oracle using JDBC, so make sure you bone up on that API. Other than that, it depends on the type of application. Standalone apps may use Swing (the Java UI toolkit) or in the future JavaFX, which is supposed to make Swing obsolete and may do so in a few years. Web/enterprisey apps will make use of Java Enterprise Edition, so take a look at the servlet API, and if the app uses Enterprise JavaBeans, look at the Java Persistence API, which you would probably be using instead of JDBC.
I haven't used JDeveloper, but I haven't found anything wrong with the free IDEs like Eclipse or Netbeans, and my personal favorite is JetBrains's IntelliJ IDEA.
There's really nothing specific you need to learn to be an oracle devloper per se. Obviously you need to learn oracle sql syntax, and all the standard rdbms theory that goes along with database programming in general. The Java libs for database support are pretty easy to pick up and run with. I'm sure you can find a tutorial on the web by a quick google search.
As for IDE I'd recommend Eclipse. It's a bit cumbersome at times, but the number of plug-ins available is staggering, and it has great refactoring and code completion support.
Expert Oracle JDBC Programming is a book aimed directly at developers who want to use Java with Oracle. Before you make even that small monetary investment though, you might want to check out the JDBC tutorial published by Sun.
You can use JDeveloper and try to find some tutorials for it (I actually had some from my university). It integrates well with rest of Oracle stack (db and application server). Down site is that although you can download some developers editions to run for personal usage, running Oracle db + Oracle application server + JDeveloper on a machine that has less then 4GB of ram and one core is not really peasant experience.
Your question is very simple so I have listed a few simple steps to start developing a Java application using Oracle technologies.
Install Oracle XE Database.
Install [JDeveloper]. Choose the install with Weblogic if you are developing a J2EE application.
Build and run a jdbc application using the [sample code] or use the wizard in JDeveloper.
Install SQL Developer for writing stored procedures.
Steps 3. and 4. are optional. You now have everything you need to build either a proof of concept or an enterprise grade database application, using simple wizards and without re-inventing the wheel.
You mentioned developing an Oracle Application. It's best to leave the development of Oracle's packaged Application to Oracle itself but if you want to integrate your custom java application with Oracle's packaged application then use Oracle's SOA Suite.
Cheers
KB