使用mysql数据库、nacos配置中心两种方式实现gateway动态路由_gateway动态路由 数据库 nacos redis-程序员宅基地
1、MYSQL实现
表结构设计
代码设计
package com.example.config;
import com.alibaba.fastjson.JSON;
import com.example.domain.Filters;
import com.example.domain.Predicates;
import com.example.domain.Routes;
import com.example.service.IFiltersService;
import com.example.service.IPredicatesService;
import com.example.service.IRoutesService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.gateway.filter.FilterDefinition;
import org.springframework.cloud.gateway.handler.predicate.PredicateDefinition;
import org.springframework.cloud.gateway.route.RouteDefinition;
import org.springframework.cloud.gateway.route.RouteDefinitionLocator;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import javax.annotation.PostConstruct;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.*;
import java.util.stream.Collectors;
@Component
@EnableScheduling
public class DynamicRouteServiceImplByMysql {
@Autowired
private DynamicRouteServiceImpl dynamicRouteService;
@Autowired
private RouteDefinitionLocator routeDefinitionLocator;
@Autowired
private IFiltersService iFiltersService;
@Autowired
private IRoutesService iRoutesService;
@Autowired
private IPredicatesService iPredicatesService;
@PostConstruct
public void init() {
dynamicRouteByMysql();
}
/**
* 从数据库加载路由
*
*/
public void dynamicRouteByMysql() {
try {
List<Routes> routes = iRoutesService.selectRoutesAll();
for (Routes route:routes){
//获取filters
List<FilterDefinition> filters=HandlerFilterList(route);
//predicates
List<PredicateDefinition> predicates =HandlerPredicateList(route);
//给routeDefinition对象赋值
RouteDefinition routeDefinition=new RouteDefinition();
routeDefinition.setId(route.getId());
URI url=new URI(route.getUri());
routeDefinition.setUri(url);
routeDefinition.setFilters(filters);
routeDefinition.setPredicates(predicates);
route.setStatus("Y");
iRoutesService.updateRoutes(route);
//RouteDefinition routeDefinition = (RouteDefinition)JSON.parse(routeJson);
dynamicRouteService.add(routeDefinition);
}
} catch (Exception e) {
e.printStackTrace();
}
}
@Scheduled(fixedRate=1000*10)
public void updateRoute() {
try {
List<Routes> routes = iRoutesService.selectRoutesAll();
List<RouteDefinition> definitionList=new ArrayList<>();
List<RouteDefinition> runningDefinitionList = Optional.ofNullable(routeDefinitionLocator.getRouteDefinitions()).map(Flux::collectList).map(Mono::block).orElse(Collections.emptyList());
for (Routes route:routes){
//获取filters
List<FilterDefinition> filters=HandlerFilterList(route);
//predicates
List<PredicateDefinition> predicates =HandlerPredicateList(route);
//给routeDefinition对象赋值
RouteDefinition routeDefinition=new RouteDefinition();
routeDefinition.setId(route.getId());
URI url=new URI(route.getUri());
routeDefinition.setUri(url);
routeDefinition.setFilters(filters);
routeDefinition.setPredicates(predicates);
//RouteDefinition routeDefinition = (RouteDefinition)JSON.parse(routeJson);
dynamicRouteService.update(routeDefinition);
route.setStatus("Y");
iRoutesService.updateRoutes(route);
definitionList.add(routeDefinition);
}
/*List<RouteDefinition> definitionList = JSON.parseArray(configInfo, RouteDefinition.class);
for (RouteDefinition definition : definitionList) {
dynamicRouteService.update(definition);
}*/
List<String> newRunningDefinitionIds = definitionList.stream().map(RouteDefinition::getId).collect(Collectors.toList());
runningDefinitionList.stream().map(RouteDefinition::getId)
.filter(routeId -> !newRunningDefinitionIds.contains(routeId)).forEach(this::deleteRoute);
}catch (Exception e){
e.printStackTrace();
}
}
private void deleteRoute(String routeId) {
dynamicRouteService.delete(routeId);
}
/**
* 处理PredicateDefinition
* @return
*/
public List<PredicateDefinition> HandlerPredicateList(Routes route) {
List<PredicateDefinition> predicates = new ArrayList<>();
List<Predicates> predicateList = iPredicatesService.selectPredicatesListByRoutes_id(route.getId());
for (Predicates predicate:predicateList){
PredicateDefinition predicateDefinition = new PredicateDefinition();
Map<String, String> args = predicate.getArgs();
String[] strings = predicate.getValue().split(",");
for (int i=0;i<strings.length;i++){
String key = "_genkey_"+i;
args.put(key,strings[i]);
}
predicateDefinition.setName(predicate.getName());
predicateDefinition.setArgs(args);
predicates.add(predicateDefinition);
}
return predicates;
}
/**
*处理FilterDefinition
* @return
*/
public List<FilterDefinition> HandlerFilterList(Routes route) {
List<FilterDefinition> filters = new ArrayList<>();
List<Filters> filterList = iFiltersService.selectFiltersListByRoutes_id(route.getId());
for (Filters filter:filterList){
FilterDefinition filterDefinition = new FilterDefinition();
Map<String, String> args = filter.getArgs();
String[] strings = filter.getValue().split(",");
for (int i=0;i<strings.length;i++){
String key = "_genkey_"+i;
args.put(key,strings[i]);
}
filterDefinition.setName(filter.getName());
filterDefinition.setArgs(args);
filters.add(filterDefinition);
}
return filters;
}
}
码片
package com.example.config;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.gateway.event.RefreshRoutesEvent;
import org.springframework.cloud.gateway.route.RouteDefinition;
import org.springframework.cloud.gateway.route.RouteDefinitionWriter;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.ApplicationEventPublisherAware;
import org.springframework.stereotype.Service;
import reactor.core.publisher.Mono;
@Service
public class DynamicRouteServiceImpl implements ApplicationEventPublisherAware {
@Autowired
private RouteDefinitionWriter routeDefinitionWriter;
private ApplicationEventPublisher publisher;
/**
* ����·��
*
* @param definition
* @return
*/
public String add(RouteDefinition definition) {
routeDefinitionWriter.save(Mono.just(definition)).subscribe();
this.publisher.publishEvent(new RefreshRoutesEvent(this));
return "success";
}
/**
* ����·��
*
* @param definition
* @return
*/
public String update(RouteDefinition definition) {
try {
routeDefinitionWriter.save(Mono.just(definition)).subscribe();
this.publisher.publishEvent(new RefreshRoutesEvent(this));
return "success";
} catch (Exception e) {
return "update route fail";
}
}
/**
* ɾ��·��
*
* @param id
* @return
*/
public String delete(String id) {
try {
this.routeDefinitionWriter.delete(Mono.just(id)).subscribe();
this.publisher.publishEvent(new RefreshRoutesEvent(this));
return "delete success";
} catch (Exception e) {
e.printStackTrace();
return "delete fail";
}
}
@Override
public void setApplicationEventPublisher(ApplicationEventPublisher applicationEventPublisher) {
this.publisher = applicationEventPublisher;
}
}
说明：数据库这种方式是我们领导要求的，加了定时器轮询，误差和定时器轮询的间隔时间有关，这样做的好处是可以做成界面话展示，方便操作，界面大致如下：
2、nacos配置中心实现
代码设计
package com.example.config;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.gateway.event.RefreshRoutesEvent;
import org.springframework.cloud.gateway.route.RouteDefinition;
import org.springframework.cloud.gateway.route.RouteDefinitionWriter;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.ApplicationEventPublisherAware;
import org.springframework.stereotype.Service;
import reactor.core.publisher.Mono;
@Service
public class DynamicRouteServiceImpl implements ApplicationEventPublisherAware {
@Autowired
private RouteDefinitionWriter routeDefinitionWriter;
private ApplicationEventPublisher publisher;
/**
* ����·��
*
* @param definition
* @return
*/
public String add(RouteDefinition definition) {
routeDefinitionWriter.save(Mono.just(definition)).subscribe();
this.publisher.publishEvent(new RefreshRoutesEvent(this));
return "success";
}
/**
* ����·��
*
* @param definition
* @return
*/
public String update(RouteDefinition definition) {
try {
routeDefinitionWriter.save(Mono.just(definition)).subscribe();
this.publisher.publishEvent(new RefreshRoutesEvent(this));
return "success";
} catch (Exception e) {
return "update route fail";
}
}
/**
* ɾ��·��
*
* @param id
* @return
*/
public String delete(String id) {
try {
this.routeDefinitionWriter.delete(Mono.just(id)).subscribe();
this.publisher.publishEvent(new RefreshRoutesEvent(this));
return "delete success";
} catch (Exception e) {
e.printStackTrace();
return "delete fail";
}
}
@Override
public void setApplicationEventPublisher(ApplicationEventPublisher applicationEventPublisher) {
this.publisher = applicationEventPublisher;
}
}
package com.example.config;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
@Configuration
public class GatewayConfig {
@Value("${spring.cloud.nacos.config.server-addr}")
private String nacosServerAddr;
@Value("${spring.cloud.nacos.config.namespace}")
private String nacosNamespace;
@Value("${nacos.gateway.route.config.data-id}")
private String nacosRouteDataId;
@Value("${nacos.gateway.route.config.group}")
private String nacosRouteGroup;
public String getNacosServerAddr() {
return nacosServerAddr;
}
public void setNacosServerAddr(String nacosServerAddr) {
this.nacosServerAddr = nacosServerAddr;
}
public String getNacosNamespace() {
return nacosNamespace;
}
public void setNacosNamespace(String nacosNamespace) {
this.nacosNamespace = nacosNamespace;
}
public String getNacosRouteDataId() {
return nacosRouteDataId;
}
public void setNacosRouteDataId(String nacosRouteDataId) {
this.nacosRouteDataId = nacosRouteDataId;
}
public String getNacosRouteGroup() {
return nacosRouteGroup;
}
public void setNacosRouteGroup(String nacosRouteGroup) {
this.nacosRouteGroup = nacosRouteGroup;
}
}
package com.example.config;
import com.alibaba.fastjson.JSON;
import com.alibaba.nacos.api.NacosFactory;
import com.alibaba.nacos.api.config.ConfigService;
import com.alibaba.nacos.api.config.listener.Listener;
import com.alibaba.nacos.api.exception.NacosException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.gateway.route.RouteDefinition;
import org.springframework.cloud.gateway.route.RouteDefinitionLocator;
import org.springframework.stereotype.Component;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import javax.annotation.PostConstruct;
import java.util.Collections;
import java.util.List;
import java.util.Optional;
import java.util.Properties;
import java.util.concurrent.Executor;
import java.util.stream.Collectors;
//@Component
public class DynamicRouteServiceImplByNacos {
@Autowired
private DynamicRouteServiceImpl dynamicRouteService;
@Autowired
private GatewayConfig gatewayConfig;
@Autowired
private RouteDefinitionLocator routeDefinitionLocator;
@PostConstruct
public void init() {
dynamicRouteByNacosListener(gatewayConfig.getNacosRouteDataId(), gatewayConfig.getNacosRouteGroup());
}
/**
* ����Nacos Server�·��Ķ�̬·������
*
* @param dataId
* @param group
*/
public void dynamicRouteByNacosListener(String dataId, String group) {
try {
Properties properties = new Properties();
properties.setProperty("serverAddr", gatewayConfig.getNacosServerAddr());
properties.setProperty("namespace", gatewayConfig.getNacosNamespace());
ConfigService configService = NacosFactory.createConfigService(properties);
String configInfo = configService.getConfig(dataId, group, 5000);
List<RouteDefinition> definitionList = JSON.parseArray(configInfo, RouteDefinition.class);
for (RouteDefinition definition : definitionList) {
dynamicRouteService.add(definition);
}
configService.addListener(dataId, group, new Listener() {
@Override
public void receiveConfigInfo(String configInfo) {
List<RouteDefinition> runningDefinitionList = Optional.ofNullable(routeDefinitionLocator.getRouteDefinitions()).map(Flux::collectList).map(Mono::block).orElse(Collections.emptyList());
List<RouteDefinition> definitionList = JSON.parseArray(configInfo, RouteDefinition.class);
for (RouteDefinition definition : definitionList) {
dynamicRouteService.update(definition);
}
List<String> newRunningDefinitionIds = definitionList.stream().map(RouteDefinition::getId).collect(Collectors.toList());
runningDefinitionList.stream().map(RouteDefinition::getId)
.filter(routeId -> !newRunningDefinitionIds.contains(routeId)).forEach(this::deleteRoute);
}
@Override
public Executor getExecutor() {
return null;
}
private void deleteRoute(String routeId) {
dynamicRouteService.delete(routeId);
}
});
} catch (NacosException e) {
}
}
}
naocs配置中心配置
[{
"id":"user-service",
"order":0,
"predicates":[{
"args":{
"_genkey_0":"/user-service/**"
},
"name":"Path"
},
{
"args":{
"_genkey_0":"2017-01-20T17:42:47.789-07:00[America/Denver]"
},
"name":"After"
}],
"uri":"lb://user-service",
"filters":[{
"args":{
"_genkey_0":1
},
"name":"StripPrefix"
}]
}]
说明：相对于数据库来说，使用nacos需要每次改动json配置，可能存在误操作的情况居多，但是可以实现实时生效。不像数据库，有一定的延迟。
版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。
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