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one of the most important value propositions for frameworks like Spring has been the ability to easily extend the framework or integrate third-party solutions

SPI allows you to register your own beans, custom scopes, stereotypes, interceptors and decorators with CDI even if is it not included in the automatic scanning process (such as perhaps registering Spring beans as CDI beans), programmatically looking up CDI beans and injecting them into your own objects (such as injecting CDI beans into Spring beans) and adding/overriding annotation-metadata from other sources (such as from a database or property file)

SPI can be segmented into three parts. Interfaces like Bean, Interceptor and Decorator model container meta-data (there are a few other meta-data interfaces such as ObserverMethod, Producer, InjectionTarget, InjectionPoint, AnnotatedType, AnnotatedMethod, etc). Each meta-data object encapsulates everything that the CDI container needs to know about the meta-data type

Boundary

Control

Entity

Use a common database user id, and manage auditing and security in the application

managed in the application by having an application user, and a single shared database user

adding a AUDIT_USER and AUDIT_TIMESTAMP column to all of the audited tables and auditUser and auditTimestamp field to all of the audited objects

queries are also known as native queries

SQL Queries

reasons why a developer using JP QL might want to integrate SQL queries into their application

Find the JVM If a JVM is installed in the eclipse/jre directory, Eclipse will use it; otherwise the launcher will consult the eclipse.ini file and the system path variable

In JEE the EntityManager or EntityManagerFactory can

injected into a SessionBean

A managed EntityManager should never be closed, and integrates with JTA transactions

Mapping enum to database column using JPA/Hibernate You can use any of the 3 approaches discussed above. Map the enum to an integer column. The persistence implementation should automatically convert enum to ordinal() and back for you. Map the enum to a String column. The persistence implementation should automatically convert the enum value to String value via the name() function. Map the enum using a business value. You should mark the enum field as @Transient, and create another String field which you can map to a String column in your database table. Here’s an example code snippet. view plaincopy to clipboardprint?@Entity  public class Product {   @Column   private String colorValue;     @Transient   public Color getColor() {    return Color.fromValue(colorValue);   }     public void setColor(Color color) {    this.colorValue = color.toValue();   }  }  

Approach 3: Using a user defined business value – Recommended approach! This approach involves assigning a an explicit user defined value to each enum constant and defining a toValue() and fromValue() methods on the enum to do the serialization and deserialization.

public enum Color {   RED("RED"), GREEN("GREEN"), BLUE("BLUE"), UNKNOWN("UNKNOWN");     private final String value;     Color(String value) {     this.value = value;   }     public static Color fromValue(String value) {     if (value != null) {       for (Color color : values()) {         if (color.value.equals(value)) {           return color;         }       }     }       // you may return a default value     return getDefault();     // or throw an exception     // throw new IllegalArgumentException("Invalid color: " + value);   }     public String toValue() {     return value;   }     public static Color getDefault() {     return UNKNOWN;   }  }  public enum Color { RED("RED"), GREEN("GREEN"), BLUE("BLUE"), UNKNOWN("UNKNOWN"); private final String value; Color(String value) { this.value = value; } public static Color fromValue(String value) { if (value != null) { for (Color color : values()) { if (color.value.equals(value)) { return color; } } } // you may return a default value return getDefault(); // or throw an exception // throw new IllegalArgumentException("Invalid color: " + value); } public String toValue() { return value; } public static Color getDefault() { return UNKNOWN; } } This approach is better than approach 1 and approach 2 above. It neither depends on the order in which the enum constants are declared nor on the constant names.

adding this profile to your settings.xml

Seam 3 modules and examples are published to the JBoss Community Maven Repository when they are released

<url>http://repository.jboss.org/nexus/content/groups/public</url>

previously known as the JSecurity project

The word Subject is a security term that basically means "the currently executing user"

Core Concepts: Subject, SecurityManager, and Realms

The quickstarts demonstrate JBoss AS 7, Java EE 6 and a few additional technologies. They provide small, specific, working examples that can be used as a reference for your own project

migrating Spring Applications to Java EE 6 technology

rationale for migrating your applications from Spring to Java EE 6

examples of upgrading the web UI, replacing the data access layer, migrating AOP to CDI interceptors, migrating JMX, how to deal with JDBC templates