Monitors In my previous post we spoke about locks and resource synchronization. A Monitor also provides a similar set of actions to a lock, but the syntactic sugar slightly differs from locks. They allow a program to ensure only one thread at a time can access a particular object. Rather than controlling a statement or... » read more
Manage Multithreading In a multi-threading program, the order in which the actions were performed was different each time. This is because operating system decides when a thread runs, and the decisions are made based on the workload. When asynchronous solutions are designed with multi-threading one should consider the uncertainty about the timings of thread activity... » read more
Consider the following example where the method Compute Averages is going to calculate the average of random numbers generated over the given number. If the method is called with a very large number (100000000), the random number generator takes time to generate the numbers over a very large number of operations and on top of... » read more
Command Pattern The Command pattern encapsulates the request as an object thereby letting you parameterize other objects with different requests queue or log request and support undoable operations. The key thing to understand here is its not the sender who is sending the request nor the receiver who is consuming it is encapsulated, its the... » read more
The Factory method pattern defines an interface in terms of contract for creating an object but let’s subclasses decide which classes to instantiate. Factory method lets the class differ instantiation to sub classes. It says that when you are about to instantiate let’s encapsulate that instantiation so that we can make it uniform across all... » read more
Proxy Pattern provides a surrogate or placeholder for another object in order to control access to it. You have an object that you want to get access to on which you want to invoke methods on and somehow interact with it but instead of being allowed to interact with that object you have a proxy... » read more