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Today, I will talk to you about how to understand URLInjector in Storm. Many people may not know much about it. In order to make you understand better, the editor summarized the following content for you. I hope you can get something according to this article.

Introduction: URLInjector, I encapsulated a simple client, we are going to put URLs into a sharding queue [sharded queue]. Only the data placed in the sharding queue will be processed by the Storm pipeline.

Package com.digitalpebble.storm.crawler;import java.io.BufferedReader;import java.io.File;import java.io.FileReader;import com.digitalpebble.storm.crawler.util.Configuration;import com.digitalpebble.storm.fetchqueue.ShardedQueue;public class URLInjector {private ShardedQueue queue; URLInjector () throws Exception {Configuration config = StormConfiguration.create (); queue = ShardedQueue.getInstance (config) } public void add (String url) {try {queue.add (url);} catch (Exception e) {e.printStackTrace ();}} public void close () {queue.close () } public static void main (String [] args) throws Exception {String messages = args [0]; URLInjector client = new URLInjector (); BufferedReader reader = new BufferedReader (new FileReader (new File (messages); String line = null While ((line = reader.readLine ())! = null) {client.add (line.trim ());} reader.close (); client.close ();}} after reading the above, do you have any further understanding of how to understand URLInjector in Storm? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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