2 * ========================LICENSE_START=================================
5 * Copyright (C) 2019 Nordix Foundation
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ========================LICENSE_END===================================
21 package org.oransc.policyagent.controllers;
23 import com.google.gson.Gson;
24 import com.google.gson.GsonBuilder;
26 import io.swagger.annotations.Api;
27 import io.swagger.annotations.ApiOperation;
28 import io.swagger.annotations.ApiParam;
29 import io.swagger.annotations.ApiResponse;
30 import io.swagger.annotations.ApiResponses;
32 import java.net.MalformedURLException;
34 import java.time.Duration;
35 import java.util.ArrayList;
36 import java.util.Collection;
38 import org.oransc.policyagent.exceptions.ServiceException;
39 import org.oransc.policyagent.repository.Policies;
40 import org.oransc.policyagent.repository.Policy;
41 import org.oransc.policyagent.repository.Service;
42 import org.oransc.policyagent.repository.Services;
43 import org.springframework.beans.factory.annotation.Autowired;
44 import org.springframework.http.HttpStatus;
45 import org.springframework.http.ResponseEntity;
46 import org.springframework.web.bind.annotation.DeleteMapping;
47 import org.springframework.web.bind.annotation.GetMapping;
48 import org.springframework.web.bind.annotation.PutMapping;
49 import org.springframework.web.bind.annotation.RequestBody;
50 import org.springframework.web.bind.annotation.RequestParam;
51 import org.springframework.web.bind.annotation.RestController;
54 @Api(tags = "Service registry and supervision")
55 public class ServiceController {
57 private final Services services;
58 private final Policies policies;
60 private static Gson gson = new GsonBuilder() //
64 ServiceController(Services services, Policies policies) {
65 this.services = services;
66 this.policies = policies;
69 @GetMapping("/services")
70 @ApiOperation(value = "Returns service information")
73 @ApiResponse(code = 200, message = "OK", response = ServiceStatus.class, responseContainer = "List"), //
74 @ApiResponse(code = 404, message = "Service is not found", response = String.class)})
75 public ResponseEntity<String> getServices(//
76 @ApiParam(name = "name", required = false, value = "The name of the service") //
77 @RequestParam(name = "name", required = false) String name) {
78 if (name != null && this.services.get(name) == null) {
79 return new ResponseEntity<>("Service not found", HttpStatus.NOT_FOUND);
82 Collection<ServiceStatus> servicesStatus = new ArrayList<>();
83 for (Service s : this.services.getAll()) {
84 if (name == null || name.equals(s.getName())) {
85 servicesStatus.add(toServiceStatus(s));
89 String res = gson.toJson(servicesStatus);
90 return new ResponseEntity<>(res, HttpStatus.OK);
93 private ServiceStatus toServiceStatus(Service s) {
94 return new ServiceStatus(s.getName(), s.getKeepAliveInterval().toSeconds(), s.timeSinceLastPing().toSeconds(),
98 private void validateRegistrationInfo(ServiceRegistrationInfo registrationInfo)
99 throws ServiceException, MalformedURLException {
100 if (registrationInfo.serviceName.isEmpty()) {
101 throw new ServiceException("Missing mandatory parameter 'serviceName'");
103 if (registrationInfo.keepAliveIntervalSeconds < 0) {
104 throw new ServiceException("Keepalive interval shoul be greater or equal to 0");
106 if (!registrationInfo.callbackUrl.isEmpty()) {
107 new URL(registrationInfo.callbackUrl);
111 @ApiOperation(value = "Register a service")
114 @ApiResponse(code = 200, message = "Service updated", response = String.class),
115 @ApiResponse(code = 201, message = "Service created", response = String.class), //
116 @ApiResponse(code = 400, message = "The ServiceRegistrationInfo is not accepted", response = String.class)})
117 @PutMapping("/service")
118 public ResponseEntity<String> putService(//
119 @RequestBody ServiceRegistrationInfo registrationInfo) {
121 validateRegistrationInfo(registrationInfo);
122 final boolean isCreate = this.services.get(registrationInfo.serviceName) == null;
123 this.services.put(toService(registrationInfo));
124 return new ResponseEntity<>("OK", isCreate ? HttpStatus.CREATED : HttpStatus.OK);
125 } catch (Exception e) {
126 return new ResponseEntity<>(e.getMessage(), HttpStatus.BAD_REQUEST);
130 @ApiOperation(value = "Delete a service")
133 @ApiResponse(code = 204, message = "OK"),
134 @ApiResponse(code = 404, message = "Service not found", response = String.class)})
135 @DeleteMapping("/services")
136 public ResponseEntity<String> deleteService(//
137 @ApiParam(name = "name", required = true, value = "The name of the service") //
138 @RequestParam(name = "name", required = true) String serviceName) {
140 Service service = removeService(serviceName);
141 // Remove the policies from the repo and let the consistency monitoring
143 removePolicies(service);
144 return new ResponseEntity<>("OK", HttpStatus.NO_CONTENT);
145 } catch (Exception e) {
146 return new ResponseEntity<>(e.getMessage(), HttpStatus.NOT_FOUND);
150 @ApiOperation(value = "Heartbeat from a serice")
153 @ApiResponse(code = 200, message = "Service supervision timer refreshed, OK"),
154 @ApiResponse(code = 404, message = "The service is not found, needs re-registration")})
155 @PutMapping("/services/keepalive")
156 public ResponseEntity<String> keepAliveService(//
157 @ApiParam(name = "name", required = true, value = "The name of the service") //
158 @RequestParam(name = "name", required = true) String serviceName) {
160 services.getService(serviceName).keepAlive();
161 return new ResponseEntity<>("OK", HttpStatus.OK);
162 } catch (ServiceException e) {
163 return new ResponseEntity<>(e.getMessage(), HttpStatus.NOT_FOUND);
167 private Service removeService(String name) throws ServiceException {
168 Service service = this.services.getService(name); // Just to verify that it exists
169 this.services.remove(service.getName());
173 private void removePolicies(Service service) {
174 Collection<Policy> policyList = this.policies.getForService(service.getName());
175 for (Policy policy : policyList) {
176 this.policies.remove(policy);
180 private Service toService(ServiceRegistrationInfo s) {
181 return new Service(s.serviceName, Duration.ofSeconds(s.keepAliveIntervalSeconds), s.callbackUrl);