Example usage for org.apache.spark.api.java.function Function0 Function0

Introduction

In this page you can find the example usage for org.apache.spark.api.java.function Function0 Function0.

Prototype

Function0

Source Link

Usage

From source file:com.andado.spark.examples.streaming.JavaWordBlacklist.java

License:Apache License

public static void main(String[] args) throws Exception {
    if (args.length != 4) {
        System.err.println("You arguments were " + Arrays.asList(args));
        System.err.println("Usage: JavaRecoverableNetworkWordCount <hostname> <port> <checkpoint-directory>\n"
                + "     <output-file>. <hostname> and <port> describe the TCP server that Spark\n"
                + "     Streaming would connect to receive data. <checkpoint-directory> directory to\n"
                + "     HDFS-compatible file system which checkpoint data <output-file> file to which\n"
                + "     the word counts will be appended\n" + "\n"
                + "In local mode, <master> should be 'local[n]' with n > 1\n"
                + "Both <checkpoint-directory> and <output-file> must be absolute paths");
        System.exit(1);//from   www. jav  a 2s .co m
    }

    final String ip = args[0];
    final int port = Integer.parseInt(args[1]);
    final String checkpointDirectory = args[2];
    final String outputPath = args[3];

    // Function to create JavaStreamingContext without any output operations
    // (used to detect the new context)
    Function0<JavaStreamingContext> createContextFunc = new Function0<JavaStreamingContext>() {
        @Override
        public JavaStreamingContext call() {
            return createContext(ip, port, checkpointDirectory, outputPath);
        }
    };

    JavaStreamingContext ssc = JavaStreamingContext.getOrCreate(checkpointDirectory, createContextFunc);
    ssc.start();
    ssc.awaitTermination();
}

---