Popular posts from this blog
EJB - Stateful vs Stateless
For stateless session beans the server can maintain a variable amount of instances in a pool. Each time a client requests such a stateless bean (e.g. through a method) a random instance is chosen to serve that request. That means if the client does two subsequent requests it is possible that two different instances of the stateless bean serve the requests. In fact there is no conversational state between the two requests. Also if the client disappears, the stateless bean does not get destroyed and can serve the next request from another client. On the other hand a stateful session bean is closely connected to the client. Each instance is created and bounded to a single client and serves only requests from that particular client. So happens that if you do two subsequent requests on a stateful bean, your request will be served always from the same instance of the bean. That means you can maintain a conversational state between the requests. At the end of the li...
Mirror binay tree - Java
public class TreeNode { private TreeNode left; private TreeNode right; private Object value; public TreeNode getLeft() { return left; } public TreeNode setLeft(TreeNode left) { this.left = left; return this; } public TreeNode getRight() { return right; } public TreeNode setRight(TreeNode right) { this.right = right; return this; } public Object getValue() { return value; } public TreeNode setValue(Object value) { this.value = value; return this; } } public class Mirror { public stat...
Comments
Post a Comment