@SparkConfig
	public Properties getSparkConfigProperties() {
		Properties props = new Properties();
		props.setProperty("spark.master", "local[4]");
		return props;
	}
@author Mark Fisher
@author Ilayaperumal Gopinathan
@since 1.1
spring-xd-spark-streaming/src/main/java/org/springframework/xd/spark/streaming/examples/java/FileLogger.java