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What does “program to interfaces, not implementations” mean?
...AL.
2) Reuse
Following the example above, let's say we want to move from SQL Server (which our concrete DALClass uses) to MonogoDB. This would take major work, but NOT if we've programmed to an interface. In that case we just write the new DB class, and change (via the factory)
WorkerClass ->...
How to handle many-to-many relationships in a RESTful API?
...d}/players/{playerId}
In Restful-terms it helps a lot in not thinking of SQL and joins but more into collections, sub-collections and traversal.
Some examples:
# getting player 3 who is on team 1
# or simply checking whether player 3 is on that team (200 vs. 404)
GET /teams/1/players/3
# getti...
source of historical stock data [closed]
...ers and it will be able to store the data in a database of your choice: MS SQL, MySQL, SQLite, etc. It's open source, but I'll post more information on my blog when I get closer to releasing it (within a couple of days).
Another option is eclipse trader... it allows you to record the historical dat...
If REST applications are supposed to be stateless, how do you manage sessions?
...henticate? Because I guess storing a session, even if it is on a shared no-sql db among all servers, is not stateless, or is it?
– Carlos Navarro Astiasarán
May 13 '17 at 17:50
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What are the disadvantages of using persistent connection in PDO
... a solution to anything.
Further, most modern databases (including PostgreSQL) have their own preferred ways of performing connection pooling that don't have the immediate drawbacks that plain vanilla PHP-based persistent connections do.
To clarify a point, we use persistent connections at my wo...
How to design a database for User Defined Fields?
...t this solution here: http://backchannel.org/blog/friendfeed-schemaless-mysql
Or you can use a document-oriented database, where it's expected that you have custom fields per document. I'd choose Solr.
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What is the proper REST response code for a valid request but an empty data?
... for "no result found" is like throwing a DatabaseConnectionException if a SQL query returned no results. It can get the job done, but there are lots of possible technical causes that throw the same exception which then would be mistaken for a valid result.
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Entity Framework and Connection Pooling
...pooling in connection string if you don't want to use it. (read more about SQL Server Connection Pooling (ADO.NET))
Never ever use global context. ObjectContext internally implements several patterns including Identity Map and Unit of Work. Impact of using global context is different per application...
Why must jUnit's fixtureSetup be static?
...es.getUsername;
import static java.lang.String.valueOf;
import static java.sql.Connection.TRANSACTION_READ_UNCOMMITTED;
public final class JPAConnectionExample extends ExternalResource {
private static final Logger LOG = Logger.getLogger(JPAConnectionExample.class);
@NotNull
public static J...
When should I use RequestFactory vs GWT-RPC?
...cation should contain your database application layer (hibernate, cayenne, sql etc..) This allows you to fully divorce the database object models from the actual client providing a much more extensible and robust way to develop and unit test your application. Granted it requires a tad bit of initial...