A simple transport protocol on top of a lower level communication stack.

Run Test called TransportProtocolTest from package transLayer and it will run a test on the abstract class implementation of the protocol

• the program requires JUnit, Log4j, Mockito, Maven and java.util classes.

• no outputs are generated, in future we'll add support to send transmission logs to file. We currently log at info/error levels to console.

A transport protocol on top of the provided link-layer that is capable of reliable transmission of the data having arbitrary size.

The communication stack provides a link layer that is capable of transmitting data in chunks of 20 bytes. The link layer doesn't give any transmission order guaranties. Data loss or corruption error in the link layer is unlikely but can occur. The link-layer provides API consisting of the asynchronous callback on data arrival and synchronous call to send data.

Assuming the following interfaces for link layer:

public interface ILinkLayer {
/**
* Sends data to the remote part
* @param data data to send
*/
boolean send(byte[] data);
/**
* Subscription for data listeners
* @param listener listener object
*/
void subscribeReceiveListener(IDataReceiveListener listener);
}
public interface IDataReceiveListener {
/**
* @param data from the lower layer
*/
void onData(byte[] data);
}