topic

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: How can I get number of partitions for any kafka topic from the code. I have researched many links but none seem to work. Mentioning a few: http://grokbase.com/t/kafka/users/148132gdzk/find-topic-partition-count-through-simpleclient-api http://grokbase.com/t/kafka/users/151cv3htga/get-replication-and-partition-count-of-a-topic http://qnalist.com/questions/5809219/get-replication-and-partition-count-of-a-topic which look like similar discussions. Also there are similar links on SO which do not have a working solution to this. 回答1: Go to your

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: We've got an application which will be using RabbitMQ and have several different queues for passing messages between tiers. Initially, I was planning to use multiple direct exchanges, with one for each message type, but it looks like having a single topic exchange with queues using different routing key bindings will achieve the same thing. Having a single exchange also seems like it would be a bit easier to maintain, but I was wondering if there is any benefit (if any) of doing it one way over the other? Option 1, using multiple direct

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I came across these 2 papers which combined collaborative filtering (Matrix factorization) and Topic modelling (LDA) to recommend users similar articles/posts based on topic terms of post/articles that users are interested in. The papers (in PDF) are: " Collaborative Topic Modeling for Recommending Scientific Articles " and " Collaborative Topic Modeling for Recommending GitHub Repositories " The new algorithm is called collaborative topic regression . I was hoping to find some python code that implemented this but to no avail. This might be

0)摘要 　　主要介绍了Spark Streaming整合Kafka，两种整合方式：Receiver-based和Direct方式。这里使用的是Kafka broker version 0.8.2.1，官方文档地址：（ http://spark.apache.org/docs/2.2.0/streaming-kafka-0-8-integration.html ）。 1）Kafka准备 启动zookeeper ./zkServer.sh start 启动kafka ./kafka-server-start.sh -daemon ../config/server.properties //后台启动 创建topic ./kafka-topics.sh --create --zookeeper hadoop:2181 --replication-factor 1 --partitions 1 --topic test 通过控制台测试topic能否正常的生产和消费 　　启动生产者脚本： ./kafka-console-producer.sh --broker-list hadoop:9092 --topic test 　　　启动消费者脚本： 　　 ./kafka-console-consumer.sh --zookeeper hadoop:2181 --topic test --from

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I found something very weird with Kafka. I have a producer with 3 brokers : bin/kafka-console-producer.sh --broker-list localhost:9093, localhost:9094, localhost:9095 --topic topic Then I try to run a consumer with the new API : bin/kafka-console-consumer.sh --bootstrap-server localhost:9093,localhost:9094,localhost:9095 --topic topic --from-beginning I got nothing ! BUT if I use the old API : bin/kafka-console-consumer.sh --zookeeper localhost:2181 --from-beginning --topic topic I got my messages ! What is wrong with me ? PS : I am using

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am currently creating a database, it allows a user to upload a publication, which is stored in a table called paper, it stores the paper_id, title, abstract filename and topic_id .I have a table called topic which has topic_id and topic_name which i use for the user to select a topic for their publication. However i want the user to be able to select at least 3 topics, is this possible using this system? I have run out of ideas of how to do it and help would be greatly appreciated 回答1: Don't store topic_id in the paper table. Instead,

简介 RocketMQ是一款分布式，队列模型的消息中间件 RocketMQ开发者指南 单机版安装 通过docker安装RocketMQ Server + Broker + Console，至少需要 2G 内存 docker-compose.yml 如下： version: '3.5'services: rmqnamesrv: image: foxiswho/rocketmq:server container_name: rmqnamesrv ports: - 9876:9876 volumes: - ./data/logs:/opt/logs - ./data/store:/opt/store networks: rmq: aliases: - rmqnamesrv rmqbroker: image: foxiswho/rocketmq:broker container_name: rmqbroker ports: - 10909:10909 - 10911:10911 volumes: - ./data/logs:/opt/logs - ./data/store:/opt/store - ./data/brokerconf/broker.conf:/etc/rocketmq/broker.conf environment: NAMESRV_ADDR: "rmqnamesrv

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I am trying to listen to topic using the below snippet. However its listening to queue by default. There is no xml config in this case. I am completely relying on annotations. Moreover I have relied completely on the AutoConfiguration provided by Spring boot. I am not sure how to set the destination type as topic, In JmsListener. Spring JMS gurus please help. @Component public class MyTopicListener { @JmsListener ( destination = "${trans.alert.topic}" ) public void receiveMessage ( TransactionAlert alert ) { logger . info (

交换器分类 RabbitMQ的Exchange（交换器）分为四类： direct（默认） headers fanout topic 其中headers交换器允许你匹配AMQP消息的header而非路由键，除此之外headers交换器和direct交换器完全一致，但性能却很差，几乎用不到，所以我们本文也不做讲解。 注意： fanout、topic交换器是没有历史数据的，也就是说对于中途创建的队列，获取不到之前的消息。 1、direct交换器 direct为默认的交换器类型，也非常的简单，如果路由键匹配的话，消息就投递到相应的队列，如图： 使用代码：channel.basicPublish("", QueueName, null, message)推送direct交换器消息到对于的队列，空字符为默认的direct交换器，用队列名称当做路由键。 direct交换器代码示例 发送端： Connection conn = connectionFactoryUtil.GetRabbitConnection(); Channel channel = conn.createChannel(); // 声明队列【参数说明：参数一：队列名称，参数二：是否持久化；参数三：是否独占模式；参数四：消费者断开连接时是否删除队列；参数五：消息其他参数】 channel.queueDeclare(config

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I have two tables, Table JOB and Table USER , here is the structure CREATE TABLE JOB ( ID NUMBER NOT NULL , USERID NUMBER , CONSTRAINT B_PK PRIMARY KEY ( ID ) ENABLE ); CREATE TABLE USER ( ID NUMBER NOT NULL , CONSTRAINT U_PK PRIMARY KEY ( ID ) ENABLE ); Now, i want to add foreign key constraint to JOB referencing to USER table, as Alter Table JOB ADD CONSTRAINT FK_USERID FOREIGN KEY ( USERID ) REFERENCES USER ( ID ); this throws Oracle (ORA-02270) : no matching unique or primary key for this column-list error , doing some