/*
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* Copyright (c) 2018-2028, DreamLu All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* Neither the name of the dreamlu.net developer nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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* Author: DreamLu 卢春梦 (596392912@qq.com)
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*/
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package org.springblade.core.prometheus.service;
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import lombok.RequiredArgsConstructor;
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import lombok.extern.slf4j.Slf4j;
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import org.springblade.core.prometheus.data.ChangeItem;
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import org.springblade.core.prometheus.data.Service;
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import org.springblade.core.prometheus.data.ServiceHealth;
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import org.springframework.cloud.client.ServiceInstance;
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import org.springframework.cloud.client.discovery.DiscoveryClient;
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import reactor.core.publisher.Mono;
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import java.util.*;
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import java.util.function.Supplier;
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/**
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* Returns Services and List of Service with its last changed
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*
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* @author L.cm
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*/
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@Slf4j
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@RequiredArgsConstructor
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public class RegistrationService {
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private static final String[] NO_SERVICE_TAGS = new String[0];
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private final DiscoveryClient discoveryClient;
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public Mono<ChangeItem<Map<String, String[]>>> getServiceNames(long waitMillis, Long index) {
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return returnDeferred(waitMillis, index, () -> {
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List<String> services = discoveryClient.getServices();
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Set<String> set = new HashSet<>(services);
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Map<String, String[]> result = new HashMap<>();
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for (String item : set) {
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result.put(item, NO_SERVICE_TAGS);
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}
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return result;
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});
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}
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public Mono<ChangeItem<List<Service>>> getService(String appName, long waitMillis, Long index) {
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return returnDeferred(waitMillis, index, () -> {
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List<ServiceInstance> instances = discoveryClient.getInstances(appName);
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List<Service> list = new ArrayList<>();
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if (instances == null || instances.isEmpty()) {
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return Collections.emptyList();
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}
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Set<ServiceInstance> instSet = new HashSet<>(instances);
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for (ServiceInstance instance : instSet) {
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Service service = Service.builder()
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.address(instance.getHost())
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.node(instance.getServiceId())
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.serviceAddress(instance.getHost())
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.servicePort(instance.getPort())
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.serviceName(instance.getServiceId())
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.serviceId(instance.getHost() + ":" + instance.getPort())
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.nodeMeta(Collections.emptyMap())
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.serviceMeta(instance.getMetadata())
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.serviceTags(Collections.emptyList())
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.build();
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list.add(service);
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}
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return list;
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});
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}
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public ServiceHealth getServiceHealth(Service instanceInfo) {
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String address = instanceInfo.getAddress();
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ServiceHealth.Node node = ServiceHealth.Node.builder()
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.name(instanceInfo.getServiceName())
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.address(address)
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.meta(Collections.emptyMap())
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.build();
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ServiceHealth.Service service = ServiceHealth.Service.builder()
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.id(instanceInfo.getServiceId())
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.name(instanceInfo.getServiceName())
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.tags(Collections.emptyList())
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.address(address)
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.meta(instanceInfo.getServiceMeta())
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.port(instanceInfo.getServicePort())
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.build();
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ServiceHealth.Check check = ServiceHealth.Check.builder()
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.node(instanceInfo.getServiceName())
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.checkId("service:" + instanceInfo.getServiceId())
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.name("Service '" + instanceInfo.getServiceId() + "' check")
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// nacos 实时性很高,可认定为健康
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.status("UP")
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.build();
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return ServiceHealth.builder()
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.node(node)
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.service(service)
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.checks(Collections.singletonList(check))
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.build();
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}
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private static <T> Mono<ChangeItem<T>> returnDeferred(long waitMillis, Long index, Supplier<T> fn) {
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return Mono.just(new ChangeItem<>(fn.get(), System.currentTimeMillis()));
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}
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}
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