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# Spring Cloud Tencent
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[](https://github.com/Tencent/spring-cloud-tencent/actions/workflows/junit_test.yml)
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[](https://search.maven.org/search?q=g:com.tencent.cloud%20AND%20a:spring-cloud-tencent)
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English | [简体中文](./README-zh.md)
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## Introduction
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Spring Cloud Tencent contains components distributed micro-service applications need during developing phase, developers that built their key architectures based on Spring Cloud can use these components
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Based on Spring Cloud Tencent, you only need a small configuration to launch Spring Cloud and micro-service's joint solutions.
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## Key Features
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* **Service Registration and Discovery**: Based on Spring Cloud's discovery and registration standard.
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* **Service Routing and LoadBalancer**: Based on ribbon's API port, provide dynamic routing and load balancing use cases.
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* **CircuitBreaker Node**: Support circuitbreaker auto-reset ability, ensure the reliability of distributed server
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* **Rate Limiter**: Support rate limit of microservice and gateway, ensure the stability of backend, one can configure policies and traffic data from the control panel
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* **Metadata Delivery**: Support metadata delivery between gateways and microservices.
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## Components
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**[Polaris](https://github.com/PolarisMesh/polaris)**：Polaris Spring Cloud operation centre, provide solutions to registration, dynamic routing, load balancing and circuitbreaker.
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## How to build
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* master's branch matches Spring Cloud Hoxton, support lowest at JDK 1.8.
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Spring Cloud Tencent uses Maven to construct, the fastest way is to clone project to local files, then execute the following orders:
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```bash
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./mvnw install
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```
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When all the steps are finished, the project will be installed in local Maven repository.
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## How to Use
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### How to Introduce Dependency
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Add the following configurations in dependencyManagement, then add the dependencies you need.
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At the same time, you need to pay attention to the Spring Cloud version corresponding to Spring Cloud Tencent, and then the corresponding Spring Boot version.
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For example, Spring Cloud Tencent's 1.0.1.Hoxton.SR9 corresponds to the Spring Cloud Hoxton version and requires Spring Boot 2.3.x.
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````
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<dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>com.tencent.cloud</groupId>
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<artifactId>spring-cloud-tencent-dependencies</artifactId>
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<!--version number-->
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<version>${version}</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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</dependencies>
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</dependencyManagement>
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````
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### Example
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Spring Cloud Tencent project contains a sub-module spring-cloud-tencent-examples. This module provides examples for users to experience, you can read the README.md in each example, and follow the instructions there.
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Example List:
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- [Polaris Discovery Example](spring-cloud-tencent-examples/polaris-discovery-example/README.md)
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- [Polaris CircuitBreaker Example](spring-cloud-tencent-examples/polaris-circuitbreaker-example/README.md)
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- [Polaris RateLimit Example](spring-cloud-tencent-examples/polaris-ratelimit-example/README.md)
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- [Polaris Gateway Example](spring-cloud-tencent-examples/polaris-gateway-example/README.md)
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For more features, please refer to [polaris-java](https://github.com/polarismesh/polaris-java).
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### Version Standard
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We use a version policy related to Spring Cloud's major version number.
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Project version includes ```${MAJOR_VERSION}.${MINOR_VERSION}.${PATCH_VERSION}-${CORRESPONDING_MAJOR_VERSION_OF_SPRING_CLOUD}.${CORRESPONDING_MINOR_VERSION_OF_SPRING_CLOUD}-${RELEASE_TYPE}```.
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```${MAJOR_VERSION}```, ```${MINOR_VERSION}```, ```${PATCH_VERSION}``` are in numbers starting from 0.
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```${CORRESPONDING_MAJOR_VERSION_OF_SPRING_CLOUD}``` is the same as the major version number of Spring Cloud, like Hoxton, Greenwich. ```${CORRESPONDING_MINOR_VERSION_OF_SPRING_CLOUD}``` is the same as the major version number of Spring Cloud, like RS9.
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```${RELEASE_TYPE}``` is like RELEASE or RC currently. Actually, the RELEASE version does not add a release type in the version, and the RS version will add a suffix and start from RC0.
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For example: 1.2.0-Hoxton.SR9-RC0
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## License
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The spring-cloud-tencent is licensed under the BSD 3-Clause License. Copyright and license information can be found in the file [LICENSE](LICENSE)
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