public TcpSource tcp(String host) {
		return TcpSource.withDefaultPort(host);
	}
Construct a new TcpSource with the default target host taken from the environment and default port (1234)

@param host the host ip where tcp data will be posted.
@return an instance of TcpSource
spring-xd-integration-test/src/main/java/org/springframework/xd/integration/fixtures/Sources.java