kafka producer and consumer

Kafka Producer Consumer, kafkaproducerProducer API Org. apache. kafka. clients. producer. KafkaProducer 1 props.put("bootstrap.servers", "192.168.1.128:9092"); 2 props.put("acks", "all"); 3 props.put("retries", 0); 4 props.put("batch.size", 16384); 5 props.put("linger.ms",

consumption only once, the same partition will only bind one consumer information.5, if a consumer hangs, consumer and partition binding information will be reassigned, as far as possible to ensure load balance6, if the number of consumer is greater than the number of partitions, will cause the redundant part of the t

1. Start the production and consumption process using 127.0.0.1: 1) Start the producer process: bin/kafka-console-producer.sh--broker-list 127.0.0.1:9092--topic test Input message: This is MSG Producer Process Error: [2016-06-03 11:33:47,934] WARN Bootstrap broker 127.0.0.1:9092 Disconnected (org.apache.kafka.clients.NetworkClient) [2016-06-03 11:33:49,554] W

Logger = Loggerfactory.getlogger ( This. GetClass ()); @KafkaListener (Topics= {"Test"}) Public voidListen (consumerrecordrecord) {Logger.info ("Kafka key:" +Record.key ()); Logger.info ("Kafka Value:" +Record.value (). toString ()); }}Tips1) I did not describe how to install the configuration Kafka, the best way to configure

;ImportKafka.javaapi.consumer.ConsumerConnector;ImportKafka.serializer.StringDecoder;Importkafka.utils.VerifiableProperties; Public classConsumer {Private FinalConsumerconnector Consumer; Privateconsumer () {Properties props=NewProperties (); //Zookeeper ConfigurationProps.put ("Zookeeper.connect", "192.168.152.20:2181"); //Group represents a consumer groupProps.put ("Group.id", "Jd-group"); //ZK Connection

); Mapconsumerconnector.createmessagestreams (map); List); //Create List of 4 threads to consume from each of the partitionsExecutorservice executor = Executors.newfixedthreadpool (4); //consume the messages in the threads for(FinalKafkastreamstream:streams) {Executor.submit (NewRunnable () { Public voidrun () { for(Messageandmetadata msgandmetadata:stream) {//Process Message (Msgandmetadata.message ())System.out.println ("topic:" +msgandmetadata.topic ()); Message Message=(Message) msgandmeta

Producer}public static void Main (string[] args) {New Kafkaproducer ("Test"). Start ();}}ConsumerImport Java.util.HashMap;Import java.util.List;Import Java.util.Map;Import java.util.Properties;Import Kafka.consumer.Consumer;Import Kafka.consumer.ConsumerConfig;Import Kafka.consumer.ConsumerIterator;Import Kafka.consumer.KafkaStream;Import Kafka.javaapi.consumer.ConsumerConnector;public class Kafkacomsumer extends Thread {Private String topic;Public K

Producer}public static void Main (string[] args) {New Kafkaproducer ("Test"). Start ();}}ConsumerImport Java.util.HashMap;Import java.util.List;Import Java.util.Map;Import java.util.Properties;Import Kafka.consumer.Consumer;Import Kafka.consumer.ConsumerConfig;Import Kafka.consumer.ConsumerIterator;Import Kafka.consumer.KafkaStream;Import Kafka.javaapi.consumer.ConsumerConnector;public class Kafkacomsumer extends Thread {Private String topic;Public K

to auto-commit interval "" " consumer=kafkaconsumer (Self._topic,bootstrap_servers=self._bootstrap_server, group_id=self._groupId,client_id=self._clientId,enable_auto_commit=True, auto_commit_ Interval_ms=5000,value_deserializer=lambdam:json.loads (M.decode (' Utf-8 '))) "" " There is no need to display theThe subscription function is called, the theme is specified when initializing the Kafkaconsumer object, and the subscription function is au

to auto-commit interval "" " consumer=kafkaconsumer (Self._topic,bootstrap_servers=self._bootstrap_server, group_id=self._groupId,client_id=self._clientId,enable_auto_commit=True, auto_commit_ Interval_ms=5000,value_deserializer=lambdam:json.loads (M.decode (' Utf-8 '))) "" " There is no need to display theThe subscription function is called, the theme is specified when initializing the Kafkaconsumer object, and the subscription function is au

Today, read a blog, the Java multi-thread threads of collaboration, in which the author uses the program examples to illustrate the producer and consumer issues, but I and other readers found that the program more than a few times there will be a deadlock, Baidu searched the majority of the sample also has a bug, after careful study found in the problem. And conquer, feel meaningful paste out to share under

* * @author Martin */Public class Creator2 implements Runnable { /** * Thread Resources * * private Plate Plate; Public Creator2 (Plate Plate) { this.plate = Plate; } @Override public Void Run () { synchronized (plate) { //If the number of eggs is greater than 0 at this time, wait while (Plate.geteggnum ()) >= 5) { try {/// This detail requires that if the thread enters a wait, the lock on it is temporarily released,/ /Otherwise the other thread cannot lo

Producer-consumer model, producer-consumer model Introduction 　The producer-consumer model is a classic multi-threaded design model that provides a good solution for multi-threaded collaboration. In

The Producer-consumer producer-consumer model we are introducing here is a well-known design pattern in multithreaded design patterns. When it comes to producer-consumer problems, most people are not unfamiliar with the classic pr

The producer producer, by definition, is the thread of production data, and the consumer consumer is the thread that uses the data. Can have more than one producer, can also have multiple consumers, when the producer and the

#!/usr/bin/env python#Encoding:utf8 fromQueueImportQueueImportRandom,threading,time#Producer ClassclassProducer (Threading. Thread):def __init__(self, name,queue): Threading. Thread.__init__(Self, name=name) Self.data=QueuedefRun (self): forIinchRange (5): Print("%s is producing%d to the queue!"%( self.getname (), i)) self.data.put (i) Time.sleep (Random.randrange (10)/5) Print("%s finished!"%self.getname ())#

Producer and consumer issues in java threads, java producer I. Concepts The producer-consumer issue is a golden multi-thread collaboration problem. The producer is responsible for producing and storing the product in the warehouse

Java5 has added a lot of thread synchronization features, such as explicit lock, read-write lock readwritelock, conditional variable condition, etc., although these features can be implemented using the previous synchronized synchronization keyword, but their use of synchronization keyword not only manages chaos , and error prone. The following is a better solution to the problem of producer consumers by using explicit lock and conditional variable co

(One interview question) thread-producer consumer question, question producer 1. Question about producer and consumer? 1. Producer and consumer problems (English:

Producer consumer problem is one of the classic problems in the research of multithreaded process, it describes a buffer as a storehouse, the producer can put the product into the storehouse, and the consumer can take the product from the storehouse. Solutions to producer/