Codes are in 
	\src\main\java\com\example\grpc
		DataServer.java
		DataClient.java
		DataTransferServiceImpl.java
		
To run the DataServer:
	mvn exec:java -Dexec.mainClass=com.example.grpc.DataServer
	
To run the DataClient:
	mvn exec:java -Dexec.mainClass=com.example.grpc.DataClient -Dexec.args="<hostaddr> <port> <packetsize> <datasize>"