Java is a high-level, platform-independent, object-oriented programming language originally developed by Sun Microsystems. Java is currently owned by Oracle, which purchased Sun in 2010.

learn more… | top users | synonyms

10
votes
0answers
193 views

Haskell build and artifact environment similar to Maven

I used to be a Java developer for a long time, but recently, I joined a Haskell team. In the java world, if you have a large project, with several teams working on it, a common approach is to use an ...
3
votes
0answers
161 views

How to pass control between sub-controller to parent controller in Java MVC Design Pattern?

I'm pretty new in Java, but I've done plenty of research and I know what MVC is. However, to implement MVC in Java was a difficult task. I followed this tutorial, which helped me to realise that the ...
3
votes
0answers
85 views

Incorporating custom Algorithm in SOLR-LUCENE , before Indexing?

CURRENT FLOW: I am using a custom algorithm(presently in php) to rank the MYSQL records before INDEXING it to SOLR . WHAT I WANT : Is it possible implementing this ALGORITHM(may be in JAVA) inside ...
3
votes
0answers
317 views

Which patterns/architecture to apply for “Import Data, Process Data, Export Result”

I was wondering which architecture/patterns to choose for the following problem divided into three steps: Import TestScript Description from File (e.g. .xls, .txt) Process Described TestScript ...
3
votes
0answers
178 views

How can I make a universal construction more efficient?

A "universal construction" is a wrapper class for a sequential object that enables it to be linearized (a strong consistency condition for concurrent objects). For instance, here's an adapted ...
3
votes
0answers
473 views

Fluent interface implementation and reflection. Case study

I hope I picked the right group for this question... I have this little framework I want to implement and I would like to have an opinion on it. In particular I am more concerned about the ...
3
votes
0answers
393 views

Design thoughts on a schema based request object for CXF endpoint

Trying to seek design suggestion on a schema based request object for a CXF endpoint. I've created a CXF SOAP endpoint which takes the following object as an input. The request object will have ...
2
votes
0answers
50 views

Conventions for revision control with Maven/Jenkins

For a software project I am working on, we have a 'dev => QA => production' methodology. That is, we create a release candidate (deployed to Artifactory), give it to QA (deploy to QA systems and a QA ...
2
votes
0answers
237 views

Embedded Tomcat Cluster

Can someone please explain with an example how an Embedded Tomcat Cluster works. Would a load balancer be necessary? Since we're using embedded tomcat, how would two separate jar files (each a ...
2
votes
0answers
111 views

Declarative Transactions in Node.js

Back in the day, it was common to manage database transactions in Java by writing code that did it. Something like this: Transaction tx = session.startTransaction(); ... try { tx.commit(); } catch ...
2
votes
0answers
202 views

Benefits of EJBs over POJOs for Jersey JAX-RS Resources

I'm writing a Jersey 1.9 JAX-RS application. I have to use 1.9 because it's the only supported version. I'm trying to decide if there is any benefit to using EJBs as my Jersey Resources, rather than ...
1
vote
0answers
34 views

Simple REST API calls using Spring?

Okay I'm having a simple REST API that is now running. I also got a mobile app (Android) that would be ready for some network communication. But here is the thing: I now got a fancy API created with ...
1
vote
0answers
69 views

How to loop through array bidimensional in diagonal according to a position in degrees

The title could be no self-explanatory enough but I need some conceptual help in order to implement a solution to go through an array: I'm developing a program to calculate the "most shadepath" route ...
1
vote
0answers
65 views

Finding the closest n points to any arbitrary point in two dimensions (r-tree, quadtree, spatial index)

I have a distribution of two dimensional point objects. How is it possible to find the nearest N number of points to any given point without iterating over the entire collection of points (and only ...
1
vote
0answers
46 views

How is ORB distinct from an endpoint?

What, fundamentally, am I misunderstanding about how to use appclient? The Application Client Container (ACC) includes a set of Java classes, libraries, and other files that are required for ...
1
vote
0answers
114 views

Java write to text file from multiple threads

I have a thread which read and insert new lines in same file. I must synchronized that file so that no other thread is not accessing the file at the same time. Here is how i will synchronize a file ...
1
vote
0answers
39 views

Enforce coding decision to include or exclude an Enum element in an EnumSet at compile time

I would like to enforce that the elements of a Java Enum are chosen or excluded from an EnumSet at compile time i.e. I am forced to make the decision to put it in the set or not whenever I create a ...
1
vote
0answers
25 views

do my “dal” and “fileHandler” interfaces overlap?

I want my program to: 1) read some input lines from csv file 2) write the output lines to plain string file 3) read some input from the same file in (2) and compare it to some calculated data. I ...
1
vote
0answers
109 views

Optimal data structure for binary data/Java

I have several input formats mostly restricted to geotiff and some proprietary binary formats. I import them into my program and then need to export them into various other data formats (also binary) ...
1
vote
0answers
82 views

How and where to make global function file in jsp sevlet web application

I am making a website in Servlet&JSP. I am looking for good way to make a specific function file from where I can call and declare my common functions. If I made a java file function. Java, so is ...
1
vote
0answers
53 views

Multiple 1024x1024 texture pages or one 2048x2048 texture page?

I have a lot of textures around the size of 512x512, and the LibGDX texture packer can't find a way to put more than one of those on one page for some reason. So, I end up with fifteen or sixteen ...
1
vote
0answers
96 views

Best practices for programmatic describing of behavior of complex input forms

We have a complex web form (we use GWT/GXT stack) with lots of input elements of different types (text fields, selects, checkboxes, buttons), and behavior of these elements depends on each other. Now ...
1
vote
0answers
64 views

Java MVC: multiple use of the same event for different actions

I am working on a large Java project which employs the model-view-controller pattern. Should I use a different event for each action (to let the views communicate with their respective controllers)? ...
1
vote
0answers
40 views

Individual methods or parameters for Google Analytics abstraction on Android

A coworker and I are having a discussion around the best way to build our abstraction on top of Google Analytics for an Android application. A couple of data points. We have auto-tracking enabled ...
1
vote
0answers
141 views

How to separate out below tightly coupled classes

I have two classes which are somewhat tightly coupled to one another. Lets call them A and B. A derives from C and B derives from D. B is the class whose instance is created by the system and then B ...
1
vote
0answers
148 views

Transaction Management in Hibernate with DAO Design Pattern

I have many Tables, For every Table,we have DAO Interface and DAOImplementation class. Example DAO Interface public interface CancelPolicyDAO { public CancelPolicy insertCancelPolicy(CancelPolicy ...
1
vote
0answers
82 views

Design architecture and software for webapp integrating with few other endpoints (Email Server, Jira, CRM system)

In my upcoming project, I need to integrate a webapp with few other endpoints. Main duty of the webapp will be some kind of thin-client for inner JIRA system for company. Moreover, I'll need to ...
1
vote
0answers
197 views

Do thin fluent builder method chains have any need to be “extensible”?

In an environment where refactoring is difficult extensibility can be a life saver. However, this is no excuse to over engineer code. Given that a thin fluent builder method chain is backed by well ...
1
vote
0answers
54 views

Mixing newable and injectable in a Callable

I recently read http://misko.hevery.com/2008/09/30/to-new-or-not-to-new/ which discussed newable vs injectable objects. What would you do if you needed to make a Callable that talks to some service ...
1
vote
0answers
173 views

How far to go when future proofing fluent-method-chained-DSL test code?

Is it worth implementing interfaces, or using the getThis() trick, or even static factory methods to future proof against the need to extend this DSL? The current design is a pair of thin ...
1
vote
0answers
57 views

Avoiding IllegalStateException in MVP when view is not ready yet

In an effort to improve my coding skills I am trying to make use of the MVP pattern in one of my first Android applications. It is going well but I have hit one issue that I am not sure what is the ...
1
vote
0answers
71 views

Can PhoneGap and RoboVm work in harmony?

The Goal is to make an iOS app using phonegap and java. When writing phonegap plugins that interact with native code (objective-c) would it be possible instead to make it interact with java when using ...
1
vote
0answers
67 views

MVC class modeling

I have following requirement and I am trying to design class diagram. This is the first time I am creating class diagram so I would like to get some advice from experts.. :) This is a simple login ...
1
vote
0answers
647 views

How to Implement Complex Form Data?

I'm supposed to implement a relatively complex form that looks like follows, but has at least four more pages requiring the user to fill in all necessary information for the tracks: This data will ...
1
vote
0answers
351 views

Maximum flow and minimum cut undirected graph java

I need to implement an algorithm where I find the maximum flow and the minimum cut of an undirected graph and I cannot really find an algorithm for this. I have looked at the Ford Fulkerson algortihm ...
1
vote
0answers
220 views

Single write, multiple read of stateful objects

Scenario: One data input feed (call this Source) Multiple objects (call these Layer1) read this Source, and analyze the feed. This analysis is stateful. Layer1 objects have configuration parameters. ...
0
votes
0answers
27 views

Help with IDE features integrating with ant build scripts

I've been spoiled by relying on IDE generated scripts for a while. But for the project I'm on now I have to use, basically, custom ant build.xml scripts. This hasn't really been a problem. But I'm ...
0
votes
0answers
28 views

Can't figure out how to parallelize the calculation of the amount of offspring expected for species in genetic algorithm

I developed a genetic algorithm in java 8 taking advantage of its reasonably free parallelism opportunities with Streams. As you are likely aware, running the epochs takes its time for even a test ...
0
votes
0answers
30 views

handling external events in a cluster environment

I have an app written with JSF and Spring using JPA+Hibernate which is running on a Glassfish4 server. Right now I have an Observer pattern which is listening for some Postgresql events. Let`s say ...
0
votes
0answers
38 views

what is the relationship between CORBA, JMS and MDB?

In the context of my previous fuzzy question on microservices, please help me break down the terminology involved in these technologies: CORBA JMS MDB Utilizing JNDI, I believe it's possible to do ...
0
votes
0answers
154 views

Best approach to save relationship mapping of country,state,city in orm

I am building a project in play framework java with jpa and I want set country,state,city dropdown fields in a form to be dynamic(from database).So only admin can increase or decrease the value of ...
0
votes
0answers
121 views

vert.x message bus architecture

A large part of the vert.x architecture is around the message bus, and message passing between verticals. The main idea I guess being that I can create multiple modules (possibly in multiple ...
0
votes
0answers
153 views

How to micro-ify the middle tier in a Microservice Oriented Architecture?

Just read Fowler on Microservices and definitely recommend it. A big thing that is missing from this paper/approach is how to decompose the client-tier into "micro apps". By that, here's what I mean: ...
0
votes
0answers
157 views

How to design multiplayer online game with a battlefield?

I'm designing a simple game where all players use one battlefield via browser. I'm using websockets. So I'm wondering should I always send all data about battlefield to every user when smth is being ...
0
votes
0answers
19 views

webdav in jsr268 portal application

We have a web application that we have made portal compatible(JSR 268) using spring. One part that has not been ported across is a WebDav servlet. Is it possible to have a portlet handle WebDav? or ...
0
votes
0answers
47 views

Java API initialization step

I am developing an Android Library which involves both Network and Bluetooth communication. In order to start using the library it must be configured. In other words a request to the backend must be ...
0
votes
0answers
31 views

Designing Document class for Doc Imaging - optional fields

I'm working on a project that processes many Documents. A Document CAN have a Cover Sheet (if the first page is one) A Document CAN have a Stub (if Document is large) It matters whether or not a ...
0
votes
0answers
110 views

Apache Wicket, updating data without using a form, is it safe?

I have a ListUser.java class with a datatable, displaying UserData information, displays 4 columns, the last column is an AbstractColumn that has on it's populateItm method has added a inner class ...
0
votes
0answers
37 views

Remote limitations of hg4j?

I’m evaluating hg4j to see if it’s useable in my current project. I need a (preferably) pure Java hg library that can: Check out a working copy of a remote hg repo at, say, ...
0
votes
0answers
208 views

Dynamically add/remove components to/from panel

I'm in a little planning phase of my java/swing project. Here is a picture: It is a main panel containing several sub panels depending on the selected date in the top center. I want to browse those ...