How we move the data becomes nearly as important as the data itself. Publish/subscribe messaging is a pattern that is characterized by the senders (publishers) of a piece of data (message) and consumers of the message that are loosely decoupled from each other. Pub/sub systems like Kafka are often designed with the help of an intermediary broker to orchestrate this pattern to enable diverse use cases.
A message is simply an array of bytes as far as Kafka is concerned, so the data contained within it does not have a specific format or meaning to Kafka. A message can have an optional bit of metadata, which is referred to as a key. Keys are used when messages are to be written to partitions in a more controlled manner. For efficiency, messages are written into Kafka in batches. A batch is just a collection of messages, all of which are being produced to the same topic and partition to avoid individual roundtrips across the network for each message. …
Energy, not time, is the fundamental source of efficiency and high performance.
The recovery is an integral part of sustaining high levels of energy and thus high performance. Have a life-sustaining rhythm and disengage at regular intervals i.e. rest every 90 to 120 minutes.
Drink enough water. Mild dehydration (fluid loss of 1–3%) can impair energy levels and mood, and lead to major reductions in memory and brain performance.
Take optimum amount of sleep. Having not enough sleep impairs your creativity, problem-solving, and memory that won’t help your productivity.
Work out regularly, and incorporate small exercises into your everyday lives.
In concurrent applications a thread might fail and die due to uncaught runtime exceptions even without noticing since the application may continue to work. Losing one consumer thread from a thread pool can be tolerable, but losing a single dispatcher thread can degrade application workflow.
There are four alternative approaches in Java to get notified when a task fails due to an exception, so that you can log or take some recovery action.
In the solution below, run() method of a thread is structured with try-catch block and if a task throws an unchecked exception, it allows the thread to die. …