I am new to programming and I am trying to write a java program which can solve the following problem: There are 100 students and 100 books. The books are grouped under four category (Artificial intelligence, machine learning, deep learning…
I want a Telegram bot notify me when a user do some action in my website. I have been testing Telegram bots to send messages and using getUpdates via polling to receive, and everything works perfectly. I have read than…
I got this json object data which is { "data": { "id": 2, "email": "[email protected]", "first_name": "Janet", "last_name": "Weaver", "avatar": "https://s3.amazonaws.com/uifaces/faces/twitter/josephstein/128.jpg" }, "ad": { "company": "StatusCode Weekly", "url": "http://statuscode.org/", "text": "A weekly newsletter focusing on software development, infrastructure, the server,…
I've an Azure Cache for Redis - Premium and Cluster enabled. I've been trying to connect to that Redis using spring-boot-starter-data-redis (spring boot version: 2.3.4.RELEASE, Java version: 11) and using lettuce client but Lettuce is throwing the following SSL exception…
Currently I try to store some news from a web api with the help of JPA. I have 3 entities i need to store: Webpage, NewsPost and the Query that returned the news post. I have one table for each…
I have an app using Spring Boot 2.2.6.RELEASE (spring-boot-starter-data-redis) Jedis 3.1.0. I've have a Redis 5.0.7 Cluster of 6 nodes: 3 masters and 3 slaves with replication 127.0.0.1:7000-7005 (just exemplary values). I've configured my app this way: @Configuration @EnableRedisRepositories(basePackages =…
I have Apache Karaf 4.0.1 running on a Linux Centos 7 server. I get the following error: org.osgi.service.resolver.ResolutionException: Unable to resolve root: missing requirement [root] osgi.identity; osgi.identity=travellinck-osgi; type=karaf.feature; version="[1.0.4,1.0.4]"; filter:="(&(osgi.identity=travellinck-osgi)(type=karaf.feature)(version>=1.0.4)(version<=1.0.4))" [caused by: Unable to resolve travellinck-osgi/1.0.4: missing requirement [travellinck-osgi/1.0.4] osgi.identity;…
Redis can be used as a cache storage engine within Spring(boot) applications. However, it only allows to set an overall maxmemory size limit. Is there a way to restrict individual RedisCaches in their size, either by number of elements or…
My cassandra docker-compose file: version: '2' services: redis-node-0: image: docker.io/bitnami/redis-cluster:latest ports: - "6370:6379" environment: - 'REDIS_PASSWORD=pass' - 'REDIS_NODES=redis-node-0 redis-node-1 redis-node-2 redis-node-3 redis-node-4 redis-node-5' redis-node-1: image: docker.io/bitnami/redis-cluster:latest ports: - "6371:6379" environment: - 'REDIS_PASSWORD=pass' - 'REDIS_NODES=redis-node-0 redis-node-1 redis-node-2 redis-node-3 redis-node-4 redis-node-5' redis-node-2:…
I was trying to implement Redis caching for SpringBoot app which exposes Rest API. Important code snippets and maven build file enclosed. Start-up annotations: @SpringBootApplication @EnableAsync @EnableScheduling @EnableCaching public class Application { pom.xml(Only relevant dependencies listed) : <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId>…