The Engine allows developer to create web apps in standard Java code and run them on Google's scalable infrastructure.
The Java environment provides a Java 6 JVM, a Java Servlets interface, and support for standard interfaces to the App Engine scalable datastore and services, such as JDO, JPA, JavaMail, and JCache.
App Engine runs Java applications using the Java 6 virtual machine (JVM).
The App Engine SDK supports Java 5 and later, and the Java 6 JVM can use classes compiled with any version of the Java compiler up to Java 6.
App Engine uses the Java Servlet standard for web applications.
· Java 5 or higher
What's New in This Release: [ read full changelog ]
· New Billing Enabled apps will no longer default to an email quota of 20,000 per day. Instead, apps will need to file a request through the admin console to get email quotas increased.
· Admin console dashboard charts and reports for all users have been fully migrated to the new, more reliable backend announced in 1.7.6.
· The maximum size of POST requests made through URLfetch has been increased from 5MB to 10MB.
· Fixed an issue with the Mail API to prevent sending mail from a Google Apps mail account that has been suspended.