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Java EE applications, practice 10-1

Servlet 3 (JSR 315) containers (edit)

 Servlet v3 support in different web application containers + current support state

• Glassfish 3+ (12/2009)
• Resin 4 (2/2010)
• JBoss 6 (12/2010)
• Tomcat 7 (1/2011)
• IBM WebSphere v8 (6/2011)
• Oracle WebLogic 12c (12/2011) 
• Jetty 8 (milestone)

Microsoft Surface

Expression Language 3.0 is in public review

The Expression Language (EL) is widely used in JSP and JSF. With version 3 the EL now becomes an independent specification. The EL v3 (JSR 314) is in public review until the end of July. It will be released in sync with Java EE 7 (Update: EL 3.0 was released in may 2013). New features include:

•  As an independent specification, EL now comes with a standalone API, allowing usage outside a web container.
  
• You can write your own ELProcessor. The source code is available, but I wish they had put the javadoc for  browsing at the project site as well.
• Java 8 stuff
• Lambda expressions
• Collection literals follow proposed Java 8 syntax
• List: [1, "two", 3.0]
• Set: {1, 2, 3}
• Map: {"one":1, "two":2, "three":3}
• Collection streaming
• Assignment operator (=) for changing values:
• ${customer.name = 'Jan'}
• String concatenation: + or cat operator
• ${‘Welcome ‘ += customer.name += ‘ to our site’}.
• Support for static references using the T construct (Type). 
• By default only java.* and javax.* packages are available, but you can modify this using the EL API.
  
• ${T(java.util.Calendar).APRIL}
• ${T(java.util.Calendar).getInstance()}
•  You can call constructors as a static method without a name. To call the default Calendar constructor:
  
• ${T(java.util.Calendar).()}
• For java.lang you can use the class without using the T construct
• ${Boolean.TRUE}

Little known truths

Microsoft OneNote does not have find and replace.

Install the OneMore OneNote plugin to add this incomprehensible omission.