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Observability Done Right: Best Practices and Anti-Patterns for Effective System Monitoring

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  WHAT Observability is a concept that refers to the ability to gain insights into the behavior and performance of complex systems. In the context of software engineering, observability involves the collection, analysis, and visualization of data from software applications, infrastructure, and other components of a system. In the animal kingdom, observability plays a critical role in survival, allowing animals to monitor their surroundings, detect threats, and find food. Dolphins use echolocation to observe their surroundings. They emit high-frequency sounds that bounce off objects, allowing them to create a 3D map of their environment. Thanks for reading Knowledge Cafe! Subscribe for free to receive new posts and support my work. Subscribed WHY In today's era, architectures are becoming increasingly large, complex, and fast-paced due to the faster development and deployment of software by distributed teams with the help of DevOps, continuous delivery, and agile development methodo...
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Iterate Through a HashMap

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The  HashMap  is one of the most useful data structures in the Java programming language. Once you have a HashMap filled with data, you may want to iterate through its keys and values. Below are three different ways to iterate through a Java HashMap. Sample HashMap Here is our sample HashMap. The key is an Integer and the value is a String: HashMap <Integer, String> hm = new HashMap<Integer, String>(); hm.put(0, "zero"); hm.put(1, "one"); hm.put(2, "two"); In the above Java code, we first declare the HashMap. Then we add the values "zero", "one" and "two" with the keys 0, 1 and 2 respectively. Now that the HashMap has data, we can try to iterate over the keys and values. Iteration Example 1 for (int i=0; i < hm.size(); i++) { Integer key = hm.keySet().toArray()[i]; String val = hm.values().toArray()[i]; System.out.println("key,val: " + key + "," + val); } In this example, we use a  for  loop ...
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