kafka consumer example

Environmental Preparedness Create topic command-line mode implementation of producer consumer examples Client Mode Run consumer producers 1. Environmental Preparedness Description: Kafka cluster environment I am lazy to use the company's existing environment directly. Security, all operations are done under their own users, if their own

{ public static void main (string[] args) {//Specify some consum ER properties Properties props = new properties (); Props.put ("Zookeeper.connect", "10.103.22.47:2181"); Props.put ("zookeeper.connectiontimeout.ms", "1000000"); Props.put ("Group.id", "Test_group"); //Create the connection to the cluster consumerconfig consumerconfig = new Consumerconfig (props); Consumerconnector connector = consumer.createjavaconsumerconnector (consumerconfig); NBSp map St

Decoration in ...KafkaNew TopicBin/kafka-topics. sh --create--zookeeper localhost:218131 --topic my-topicView a list of existing topicBin/kafka-topics. sh --list--zookeeper localhost:2181View the specified topic statusBin/kafka-topics. sh --describe--zookeeper localhost:2181 --topic my-topicStart consumer read message

Example analysis of credit rating model (taking consumer finance as an example)original 2016-10-13 Canlanya General Assembly data Click "Asia-General data" to follow us!the fifth chapter analysis and treatment of self-variableThere are two types of model variables, namely, continuous type variables. A continuous variable refers to the actual value of the variabl

Kafka is a message middleware for passing messages between systems, and messages can be persisted!Can be considered as a queue model, but also can be seen as a producer consumption model;The simple producer consumer client code is as follows: PackageCom.pt.util.kafka;Importjava.util.Date;Importjava.util.Properties;ImportKafka.javaapi.producer.Producer;ImportKafka.producer.KeyedMessage;ImportKafka.producer.P

Seamless integration with Kafka after Springboot1.5.2 Add dependencies Compile ("Org.springframework.kafka:spring-kafka:1.1.2.release") Add Application.properties #kafka # Specifies Kafka proxy address, can be multiple spring.kafka.bootstrap-servers= 192.168.59.130:9092,192.168.59.131:9092,192.168.59.132:9092 # Speci

continue encapsulation, encapsulating buffers with multiple producers and consumers as a workshop class, as follows: #ifndef Workshop_h_#defineWorkshop_h_#include"NonCopyable.h"#include"Buffer.h"#includeclassProducerthread;classConsumerthread;classworkshop:noncopyable{ Public: WorkShop (size_t buffersize, size_t producersize, size_t consumersize); ~WorkShop (); voidstartworking ();Private: size_t buffersize_; Buffer Buffer_; size_t Producersize_; size_t Consumersize_; Std::vectorProduc

;producer.signal (); }finally{ lock.unlock ();} }}//defines the task of the producer. classproducerimplementsrunnable{privateresourcer; producer (resourcer) {this.r= r;}publicvoidrun () { while (true) {Nbsp;r.set ("Cake");}}} //defines the task of the consumer. classconsumerimplementsrunnable{privateresourcer; consumer (resourcer) {this.r= r;}publicvoidrun () { while (True) { R.get (); }}}classthreaddemo _p

(true) {String message = "message-" + ++count;//消息主题是testKeyedMessagenew KeyedMessage"test", message);//message可以带key, 根据key来将消息分配到指定区, 如果没有key则随机分配到某个区// KeyedMessageproducer.send(keyedMessage);System.out.println("send: " + message);try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}}// producer.close();} }/*** 自定义分区类**/class MyPartition implements Partitioner {public int partition(Object key, int numPartitions) {return key.hashCode()%numPartitions;}} From fo

("message"). ToString (). Contains ("A")) println ("Find A in message:" +map.tostring ())}}classRulefilelistenerbextendsStreaminglistener {override Def onbatchstarted (batchstarted: org.apache.spark.streaming.scheduler.StreamingListenerBatchStarted) {println ("-------------------------------------------------------------------------------------------------------------- -------------------------------") println ("Check whether the file's modified date is change, if change then reload the configu

A long time many optimization personnel are not very accurate definition of SEO, think SEO is to do to search engine to see, actually, SEO is not to do to search engine to see, more is for your user. One day when your SEO road is in a confused time, it is better to stop to analyze your site's target consumers ' real needs. Today I would like to share with you, their own in the optimization of the enterprise site in accordance with the needs of consumers to do SEO. 1. Start with the key words, g

Document directory Content directory Applicable scenarios of outputdebugstring:At the same time, multiple application processes (producers) can send debugging information. Only one debugging process (consumer, egdebugview, and vs2005) can be accepted. Implementation Method:The producer synchronizes data through mutex.The producer and consumer are synchronized through two events.Consumers can exit to en

) Conf directory, then copy zoo_sample.cfg to zoo.cfg4) Modify the Datadir=d:\zookeeper-3.3.6\zookeeper-3.3.6\data in Zoo.cfg(according to the decompression path to adjust accordingly)3. Start Zookeeper go to the bin directory and execute Zkserver.cmdOpen command Window in Bin directory: SHIFT + right mouse buttonInput: Zkserver.cmd Enter execution4 Kafka ConfigurationCompressed Package Decompression: D:\kafka_2.11-0.11.0.1Go to config directory, edit

This example is used to familiarize yourself with the development process of JMS. The result is that a servlet sends a message to a message driven Bean (MDB. The server is glassfish3.1. First, create some JMS resources, including connectionfactory and a queue. In this example, it is a ptp jms link. Establish a connection Factory Start glassfish-> resources-> JMS resources-> link factory-> Create The pool

One.A lock hangs multiple sets of monitors, describes the Java.util.concurrent.locks package inside the lock interface and some features of the Conditon interface.It is important to be clear what the lock interface and condition interface do.Some people say that even an object is not, always say the interface, their own implementation? Lock and condition are exposed as interfaces, and we are using this interface, which is not implemented. Will it come true? It's impossible. Give us the interface

();}finally{Lock.unlock ();}}Public Void Get (){Lock.lock ();try {While (!flag)consumer_con.await ();System.out.println (Thread.CurrentThread (). GetName () + ".... Consumers ... "+this.name);Flag=false;producer_con.signal ();} catch (Interruptedexception e) {//TODO auto-generated catch blocke.printstacktrace ();}finally{Lock.unlock ();}}}class Producer implements Runnable{Resource R=null;Public Producer (Resource R){This.r=r;}public void Run () {TODO auto-generated method stubswhile (true)R.se

Storm.kafka.trident.TridentKafkaEmitter.emitNewPartitionBatCH (tridentkafkaemitter.java:79) at storm.kafka.trident.tridentkafkaemitter.access$000 (TridentKafkaEmitter.java : Storm.kafka.trident.tridentkafkaemitter$1.emitpartitionbatch (tridentkafkaemitter.java:204) at Storm.kafka.trident.tridentkafkaemitter$1.emitpartitionbatch (tridentkafkaemitter.java:194) at Storm.trident.spout.opaquepartitionedtridentspoutexecutor$emitter.emitbatch ( opaquepartitionedtridentspoutexecutor.java:127) at Storm.

(); //Create sessionSession = Connection.createsession (false, Session.auto_acknowledge); //Create a message queue that connects HelloWorldDestination = Session.createqueue ("HelloWorld"); //Create message ConsumersMessageconsumer =Session.createconsumer (destination); while(true) {TextMessage TextMessage= (TextMessage) messageconsumer.receive (100000); if(TextMessage! =NULL) {System.out.println ("Received message:" +Textmessage.gettext ()); }Else { Break; } }