spring-boot

问题 I tried to start scalardb backend QA application with Azure Cosmos DB. The Spring boot application shows as started. But I couldn't access the QA backend application with port 8090. Port 8090 does not list in listening ports lsof -i -P -n | grep LISTEN . QA backend Application When we connect it with the QA frontend application, it shows an error message An error occurred during the login QA frontend Application Step to reproduce Cosmos DB Account Creation Create an Azure Cosmos DB account

问题 I Introduce the problem: when I launch the application and I enter the url "/home". The home page is displayed but not correctly (the template is not well organized) and I receive an exception TemplateInputException . After a while, If I refresh the home page and the other pages It comes back to normal but if I go to "/login", and I logout which redirects me to the home view the same issue comes back again. The Stacktrace Console: org.thymeleaf.exceptions.TemplateInputException: An error

问题 I use Springboot2 and Java 8. I have been banging my head to the wall on this one, hours spent but no clue what the problem is. I try to make two independent external calls via CompletableFuture. once both they complete I want to combine their results and return to the user. On the logs I see first request is successfull but I get HTTP 503 error on the second request just on the line "restTemplate.postForEntity(..)" Note: I do NOT use any Spring based @Async (or any Spring non blocking code)

问题 I use Springboot2 and Java 8. I have been banging my head to the wall on this one, hours spent but no clue what the problem is. I try to make two independent external calls via CompletableFuture. once both they complete I want to combine their results and return to the user. On the logs I see first request is successfull but I get HTTP 503 error on the second request just on the line "restTemplate.postForEntity(..)" Note: I do NOT use any Spring based @Async (or any Spring non blocking code)

问题 I am using below spring boot config: <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.3.1.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter

问题 I have 5 Spring Boot web applications but have only one Server (low-end). What is the best way to deploy all 5 in one Server? Having only one web container (Tomcat) and deploy all of them as separate war files on the same Tomcat or run all 5 on different Tomcat containers (Spring Boot default behavior)? What is your recommendation by considering performance and maintenanability? 回答1: IMHO, if you're running a resource-constrained server, your best bet is to deploy all of your applications as

问题 I have 5 Spring Boot web applications but have only one Server (low-end). What is the best way to deploy all 5 in one Server? Having only one web container (Tomcat) and deploy all of them as separate war files on the same Tomcat or run all 5 on different Tomcat containers (Spring Boot default behavior)? What is your recommendation by considering performance and maintenanability? 回答1: IMHO, if you're running a resource-constrained server, your best bet is to deploy all of your applications as

问题 I'm trying to replace some projects to use Spring Data JDBC instead of using JdbcTemplate . Now, I'd like to use it for multiple DataSource s, how can I configure it in Spring Data JDBC? 回答1: There is currently no support for working with two or more DataSource s. You'd have to manually redo what the JdbcRepositoryFactoryBean does. 来源： https://stackoverflow.com/questions/49914310/how-to-configure-multiple-datasources-in-spring-data-jdbc

问题 After signing-in, the websockets cannot find the current user by session.getPrincipal() (it returns null). Here is the Java code for WebSockets: @Configuration @EnableWebSocketMessageBroker public class WebSocketConfiguration extends AbstractWebSocketMessageBrokerConfigurer { @Override public void configureMessageBroker(MessageBrokerRegistry config) { config.enableSimpleBroker("/queue", "/topic"); config.setApplicationDestinationPrefixes("/socket"); config.setUserDestinationPrefix("/user"); }

问题 After signing-in, the websockets cannot find the current user by session.getPrincipal() (it returns null). Here is the Java code for WebSockets: @Configuration @EnableWebSocketMessageBroker public class WebSocketConfiguration extends AbstractWebSocketMessageBrokerConfigurer { @Override public void configureMessageBroker(MessageBrokerRegistry config) { config.enableSimpleBroker("/queue", "/topic"); config.setApplicationDestinationPrefixes("/socket"); config.setUserDestinationPrefix("/user"); }