I’ve seen some suggestions like having the image directory being a symbolic link pointing to a directory outside the web container, but will this approach work both on Windows and *nix environments? If you adhere the *nix filesystem path rules (i.e. you use exclusively forward slashes as in /path/to/files), then it will work on Windows … Read more
What is the relationship between hashCode() and equals()? What is the significance of these methods? What are the requirements for implementing them?
Java SE (formerly J2SE) is the basic Java environment. In Java SE, you make all the “standards” programs with Java, using the API described here. You only need a JVM to use Java SE. Java EE (formerly J2EE) is the enterprise edition of Java. With it, you make websites, Java Beans, and more powerful server … Read more
The message is clear: you have a repeated column in the mapping. That means you mapped the same database column twice. And indeed, you have: @Column(nullable=false) private Long customerId; and also: @ManyToOne(optional=false) @JoinColumn(name=”customerId”,referencedColumnName=”id_customer”) private Customer customer; (and the same goes for productId/product). You shouldn’t reference other entities by their ID, but by a direct reference … Read more
Ok I’ll do a (shorter) one: Frontend : Tapestry (3 for older projects, 5 for newer projects) Business layer: Spring DAO’s : Ibatis Database : Oracle We use Sping transaction support, and start transactions upon entering the service layer, propagating down to the DAO call’s. The Service layer has the most bussines model knowledge, and … Read more
I came up with a slightly different solution. It’s a bit hack-ish, but here is the mapping: <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.html</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.jpg</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.png</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.css</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.js</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>myAppServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> This basically just maps all content files by extension to the default servlet, and … Read more
This is a maven error. It says that it is expecting a web.xml file in your project because it is a web application, as indicated by <packaging>war</packaging>. However, for recent web applications a web.xml file is totally optional. Maven needs to catch up to this convention. Add this to your maven pom.xml to let maven … Read more
The short answer is: there’s no standard way to do it. Although Glassfish and JBoss support principal-to-role mappings, JACC does no assume all containers do, and so it delegates the responsibility of keeping those mappings to the JACC provider implementation. From the docs (see: PolicyConfiguration.addToRole method): It is the job of the Policy provider to … Read more
I suppose you want form based authentication using deployment descriptors and j_security_check. You can also do this in JSF by just using the same predefinied field names j_username and j_password as demonstrated in the tutorial. E.g. <form action=”j_security_check” method=”post”> <h:outputLabel for=”j_username” value=”Username” /> <h:inputText id=”j_username” /> <br /> <h:outputLabel for=”j_password” value=”Password” /> <h:inputSecret id=”j_password” /> … Read more
Why really use them? (Why not just stick to POJO?) IF you need a component that accesses the database, or accesses other connectivity/ directory resources, or is accessed from multiple clients, or is intended as a SOA service, EJBs today are usually “bigger, stronger, faster (or at least more scalable) and simpler” than POJOs. They … Read more