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深入Hope-Cloud:Java微服务项目的技术精髓

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Hope-Cloud是一个Java微服务项目,该项目采用了当前流行的Spring Boot和Spring Cloud技术栈进行构建。它不仅集成了Spring Cloud系列的多个组件,还提供了微服务架构下的配置管理、服务发现、断路器、API网关以及分布式跟踪等功能。项目的开源地址提供了访问权限,开发作者表示这是他的第二个开源作品,并且已经在开发第三个开源项目。通过该项目,作者希望跟随世界变化而不断进步,同时也希望得到社区的支持和关注。 Spring Boot是基于Spring的一个框架,旨在简化新Spring应用的初始搭建以及开发过程。它使用了特定的方式来配置Spring,使得开发者可以快速启动和运行应用。Spring Cloud是一系列框架的集合,旨在简化分布式系统(如云计算环境)的构建,其核心思想是通过提供一系列的组件来简化分布式系统中常见的模式的实现,使得开发人员可以更容易地构建分布式系统。 Hope-Cloud所基于的技术栈包括: 1. **Spring Cloud Config**:提供了统一的服务器和客户端支持,用于集中式管理Spring应用的配置信息。它支持配置信息存储在本地文件、Git仓库或其他存储系统中。 2. **Spring Cloud Netflix**:包含了一系列组件,用于构建基于Netflix OSS的微服务架构,其中: - **Eureka**:服务发现组件,可以帮助服务实例注册自己并发现其他服务实例。 - **Hystrix**:实现断路器模式的库,用于处理分布式系统的延迟和容错。 - **Zuul**:作为微服务网关,可以提供动态路由、监控、弹性、安全性等服务。 - **Archaius**:提供动态配置管理。 3. **Spring Cloud Bus**:用于构建分布式系统时,连接各个微服务的消息总线。 4. **Spring Cloud for Foundry**:针对云平台Pivotal Cloud Foundry提供的扩展。 5. **Spring Cloud Cluster**:为常见的分布式系统模式提供解决方案的框架。 6. **Spring Cloud Consul**:提供了与Consul服务发现和配置的集成。 7. **Spring Cloud Security**:用于提供Spring Boot应用的额外安全特性。 8. **Spring Cloud Sleuth**:为分布式系统提供跟踪解决方案,实现跟踪日志和性能监控。 9. **Spring Cloud Data Flow**:是一个轻量级的微服务开发框架,用于创建数据集成和实时数据处理流。 10. **Spring Cloud Stream**:构建消息驱动微服务的框架,基于Spring Boot和Spring Integration。 11. **Spring Cloud Task**:用于创建短生命周期的微服务。 Hope-Cloud项目的压缩包子文件名称列表只有一个,即“hope-cloud-master”。这表明项目的源代码被包含在名为“hope-cloud-master”的压缩文件中。用户可以下载并解压该文件以获取项目代码。 通过上述技术栈的介绍,我们可以看出Hope-Cloud项目不仅仅是简单地使用Spring Boot和Spring Cloud构建微服务应用,它还整合了其他多种组件,使得开发者能够在一个统一的框架下快速地开发出具有完善功能的微服务应用。这大大减少了开发微服务架构时的配置复杂性,并提高了开发效率。 此外,Spring Cloud的组件设计思想是在提供强大功能的同时,还保持了对开发人员的友好性,使得对Spring框架有一定了解的开发者能够较为容易地上手。而Hope-Cloud项目正是基于这样的设计理念,使得Java微服务的构建变得更为高效和可靠。 随着云原生技术的发展和微服务架构的普及,希望借助Hope-Cloud这样的项目能够帮助更多开发者快速掌握和应用Java微服务技术,从而更好地满足现代企业对于快速迭代和灵活部署的需求。

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以下代码是什么意思/* * sonic-server Sonic Cloud Real Machine Platform. * Copyright (C) 2022 SonicCloudOrg * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published * by the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <https://www.gnu.org/licenses/>. */ package org.cloud.sonic.gateway.config; import com.alibaba.fastjson.JSONObject; import org.cloud.sonic.common.http.RespEnum; import org.cloud.sonic.common.http.RespModel; import org.cloud.sonic.common.tools.JWTTokenTool; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.cloud.gateway.filter.GatewayFilterChain; import org.springframework.cloud.gateway.filter.GlobalFilter; import org.springframework.core.Ordered; import org.springframework.core.io.buffer.DataBuffer; import org.springframework.http.server.reactive.ServerHttpResponse; import org.springframework.stereotype.Component; import org.springframework.web.server.ServerWebExchange; import reactor.core.publisher.Mono; import java.nio.charset.StandardCharsets; import java.util.List; @Component public class AuthFilter implements GlobalFilter, Ordered { @Value("${filter.white-list}") private List<String> whiteList; @Autowired private JWTTokenTool jwtTokenTool; @Override public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) { for (String white : whiteList) { if (exchange.getRequest().getURI().getPath().contains(white)) { return chain.filter(exchange); } } String token = exchange.getRequest().getHeaders().getFirst("SonicToken"); ServerHttpResponse response = exchange.getResponse(); response.getHeaders().add("Content-Type", "text/plain;charset=UTF-8"); DataBuffer buffer = sendResp(response); if (token == null) { return response.writeWith(Mono.just(buffer)); } // verify token if (!jwtTokenTool.verify(token)) { return response.writeWith(Mono.just(buffer)); } return chain.filter(exchange); } @Override public int getOrder() { return -100; } private DataBuffer sendResp(ServerHttpResponse response) { JSONObject result = (JSONObject) JSONObject.toJSON(new RespModel(RespEnum.UNAUTHORIZED)); DataBuffer buffer = response.bufferFactory().wrap(result.toJSONString().getBytes(StandardCharsets.UTF_8)); return buffer; } }

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// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- /* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #ifndef __RANGEFINDER_H__ #define __RANGEFINDER_H__ #include <AP_Common/AP_Common.h> #include <AP_HAL/AP_HAL.h> #include <AP_Param/AP_Param.h> #include <AP_Math/AP_Math.h> // Maximum number of range finder instances available on this platform #define RANGEFINDER_MAX_INSTANCES 2 #define RANGEFINDER_GROUND_CLEARANCE_CM_DEFAULT 10 #define RANGEFINDER_PREARM_ALT_MAX_CM 200 #define RANGEFINDER_PREARM_REQUIRED_CHANGE_CM 50 class AP_RangeFinder_Backend; class RangeFinder { public: friend class AP_RangeFinder_Backend; RangeFinder(void); // RangeFinder driver types enum RangeFinder_Type { RangeFinder_TYPE_NONE = 0, RangeFinder_TYPE_ANALOG = 1, RangeFinder_TYPE_MBI2C = 2, RangeFinder_TYPE_PLI2C = 3, RangeFinder_TYPE_PX4 = 4, RangeFinder_TYPE_PX4_PWM= 5, RangeFinder_TYPE_BBB_PRU= 6 }; enum RangeFinder_Function { FUNCTION_LINEAR = 0, FUNCTION_INVERTED = 1, FUNCTION_HYPERBOLA = 2 }; enum RangeFinder_Status { RangeFinder_NotConnected = 0, RangeFinder_NoData, RangeFinder_OutOfRangeLow, RangeFinder_OutOfRangeHigh, RangeFinder_Good }; // The RangeFinder_State structure is filled in by the backend driver struct RangeFinder_State { uint8_t instance; // the instance number of this RangeFinder uint16_t distance_cm; // distance: in cm uint16_t voltage_mv; // voltage in millivolts, // if applicable, otherwise 0 enum RangeFinder_Status status; // sensor status uint8_t range_valid_count; // number of consecutive valid readings (maxes out at 10) bool pre_arm_check; // true if sensor has passed pre-arm checks uint16_t pre_arm_distance_min; // min distance captured during pre-arm checks uint16_t pre_arm_distance_max; // max distance captured during pre-arm checks }; // parameters for each instance AP_Int8 _type[RANGEFINDER_MAX_INSTANCES]; AP_Int8 _pin[RANGEFINDER_MAX_INSTANCES]; AP_Int8 _ratiometric[RANGEFINDER_MAX_INSTANCES]; AP_Int8 _stop_pin[RANGEFINDER_MAX_INSTANCES]; AP_Int16 _settle_time_ms[RANGEFINDER_MAX_INSTANCES]; AP_Float _scaling[RANGEFINDER_MAX_INSTANCES]; AP_Float _offset[RANGEFINDER_MAX_INSTANCES]; AP_Int8 _function[RANGEFINDER_MAX_INSTANCES]; AP_Int16 _min_distance_cm[RANGEFINDER_MAX_INSTANCES]; AP_Int16 _max_distance_cm[RANGEFINDER_MAX_INSTANCES]; AP_Int8 _ground_clearance_cm[RANGEFINDER_MAX_INSTANCES]; AP_Int16 _powersave_range; static const struct AP_Param::GroupInfo var_info[]; // Return the number of range finder instances uint8_t num_sensors(void) const { return num_instances; } // detect and initialise any available rangefinders void init(void); // update state of all rangefinders. Should be called at around // 10Hz from main loop void update(void); #define _RangeFinder_STATE(instance) state[instance] uint16_t distance_cm(uint8_t instance) const { return _RangeFinder_STATE(instance).distance_cm; } uint16_t distance_cm() const { return distance_cm(primary_instance); } uint16_t voltage_mv(uint8_t instance) const { return _RangeFinder_STATE(instance).voltage_mv; } uint16_t voltage_mv() const { return voltage_mv(primary_instance); } int16_t max_distance_cm(uint8_t instance) const { return _max_distance_cm[instance]; } int16_t max_distance_cm() const { return max_distance_cm(primary_instance); } int16_t min_distance_cm(uint8_t instance) const { return _min_distance_cm[instance]; } int16_t min_distance_cm() const { return min_distance_cm(primary_instance); } int16_t ground_clearance_cm(uint8_t instance) const { return _ground_clearance_cm[instance]; } int16_t ground_clearance_cm() const { return _ground_clearance_cm[primary_instance]; } // query status RangeFinder_Status status(uint8_t instance) const; RangeFinder_Status status(void) const { return status(primary_instance); } // true if sensor is returning data bool has_data(uint8_t instance) const; bool has_data() const { return has_data(primary_instance); } // returns count of consecutive good readings uint8_t range_valid_count() const { return range_valid_count(primary_instance); } uint8_t range_valid_count(uint8_t instance) const { return _RangeFinder_STATE(instance).range_valid_count; } /* set an externally estimated terrain height. Used to enable power saving (where available) at high altitudes. */ void set_estimated_terrain_height(float height) { estimated_terrain_height = height; } /* returns true if pre-arm checks have passed for all range finders these checks involve the user lifting or rotating the vehicle so that sensor readings between the min and 2m can be captured */ bool pre_arm_check() const; private: RangeFinder_State state[RANGEFINDER_MAX_INSTANCES]; AP_RangeFinder_Backend *drivers[RANGEFINDER_MAX_INSTANCES]; uint8_t primary_instance:2; uint8_t num_instances:2; float estimated_terrain_height; void detect_instance(uint8_t instance); void update_instance(uint8_t instance); void update_pre_arm_check(uint8_t instance); }; #endif // __RANGEFINDER_H__ 这里说了什么

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