For instance, an app cannot spawn threads, write data to the local file system or make arbitrary network connections. The JVM can execute any Java bytecode that operates within the sandbox restrictions.
's Java is a clean room implementation that doesn't use any Sun code, so it doesn't always exactly match Sun release versions, but this is roughly at the Java 1.5 level with some omissions.
If you're still using Jaxen 1.1.1 or earlier, please upgrade when you get a minute. My biggest concern with this is that it makes the same mistake assertions did: it uses errors that can be be disabled at runtime where it should be using runtime exceptions.Accordingly, developers often wish to share a 'pool' of open connections between all of the application's current users.The number of users actually performing a request at any given time is usually a very small percentage of the total number of active users, and during request processing is the only time that a database connection is required.In other news, I have had very little time to work on this site lately.In order to have any time to work on other projects including XOM and Jaxen, I've had to let this site slide. Also, speaking of Jaxen, I noticed that the website has been a little out of date for a while now because I neglected to update the releases page when 1.1.2 was released in 2008.You provide your app's servlet classes, Java Server Pages (JSPs), static files and data files, along with the deployment descriptor (the file) and other configuration files, in a standard WAR directory structure.App Engine serves requests by invoking servlets according to the deployment descriptor.It also includes its own light-weight crypto that works in Java 1.0 and later, and does not depend on the JCE.Version 1.45 adds support for "EC MQV to the light weight and CMS/SMIME libraries.The JVM runs in a secured "sandbox" environment to isolate your application for service and security.The sandbox ensures that apps can only perform actions that do not interfere with the performance and scalability of other apps.