Simulates the basic functions of a distributed messaging system.

Message Class: Stores the content, timestamp, offset value and whether or not each message has been processed.

messageContent: The content of the message. timestamp: The creation time of the message. offset: Determines the position of the message. isProcessed: Tracks whether the message has been processed. Node Class: Manages the state of each node in the distributed system and handles new leader election processes.

nodeName: Node name. isLeader: Indicates whether the node is a leader or not. alive: Indicates whether the node is up and running. connectedNodes: Holds a list of connected nodes. Partition Class: Defines the structure where messages are kept.

partitionId: Partition ID. leaderNode: Partition leader node. messageTail: The queue where messages are stored. replicas: The backup nodes. retentionTimeMillis: Determines how long messages are retained. Topic Class: Defines the structure in which messages are grouped.

topicName: Topic name. partitions: List of partitions belonging to the topic. Consumer Class: Used to process messages.

partitionId: The partition to which the consumer is connected. DistributedApp Class: The main entry point of the application. This is where nodes are created, messages are added and the consumer and message processing operations are performed.