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.ApiResponse;
29 import io.swagger.annotations.ApiResponses;
31 import java.time.Duration;
32 import java.util.ArrayList;
33 import java.util.Collection;
35 import org.oransc.policyagent.exceptions.ServiceException;
36 import org.oransc.policyagent.repository.Policies;
37 import org.oransc.policyagent.repository.Policy;
38 import org.oransc.policyagent.repository.Service;
39 import org.oransc.policyagent.repository.Services;
40 import org.springframework.beans.factory.annotation.Autowired;
41 import org.springframework.http.HttpStatus;
42 import org.springframework.http.ResponseEntity;
43 import org.springframework.web.bind.annotation.DeleteMapping;
44 import org.springframework.web.bind.annotation.GetMapping;
45 import org.springframework.web.bind.annotation.PostMapping;
46 import org.springframework.web.bind.annotation.PutMapping;
47 import org.springframework.web.bind.annotation.RequestBody;
48 import org.springframework.web.bind.annotation.RequestParam;
49 import org.springframework.web.bind.annotation.RestController;
52 @Api(tags = "Service registry and supervision")
53 public class ServiceController {
55 private final Services services;
56 private final Policies policies;
58 private static Gson gson = new GsonBuilder() //
62 ServiceController(Services services, Policies policies) {
63 this.services = services;
64 this.policies = policies;
67 @GetMapping("/services")
68 @ApiOperation(value = "Returns service information")
71 @ApiResponse(code = 200, message = "OK", response = ServiceStatus.class, responseContainer = "List"), //
72 @ApiResponse(code = 404, message = "Service is not found", response = String.class)})
73 public ResponseEntity<String> getServices(//
74 @RequestParam(name = "name", required = false) String name) {
76 if (name != null && this.services.get(name) == null) {
77 return new ResponseEntity<>("Service not found", HttpStatus.NOT_FOUND);
80 Collection<ServiceStatus> servicesStatus = new ArrayList<>();
81 for (Service s : this.services.getAll()) {
82 if (name == null || name.equals(s.getName())) {
83 servicesStatus.add(toServiceStatus(s));
87 String res = gson.toJson(servicesStatus);
88 return new ResponseEntity<>(res, HttpStatus.OK);
91 private ServiceStatus toServiceStatus(Service s) {
92 return new ServiceStatus(s.getName(), s.getKeepAliveInterval().toSeconds(), s.timeSinceLastPing().toSeconds(),
96 private void validateRegistrationInfo(ServiceRegistrationInfo registrationInfo) throws ServiceException {
97 if (registrationInfo.serviceName.isEmpty()) {
98 throw new ServiceException("Missing mandatory parameter 'serviceName'");
100 if (registrationInfo.keepAliveIntervalSeconds < 0) {
101 throw new ServiceException("Keepalive interval shoul be greater or equal to 0");
105 @ApiOperation(value = "Register a service")
108 @ApiResponse(code = 200, message = "Service updated", response = String.class),
109 @ApiResponse(code = 201, message = "Service created", response = String.class), //
110 @ApiResponse(code = 400, message = "The ServiceRegistrationInfo is not accepted", response = String.class)})
111 @PutMapping("/service")
112 public ResponseEntity<String> putService(//
113 @RequestBody ServiceRegistrationInfo registrationInfo) {
115 validateRegistrationInfo(registrationInfo);
116 final boolean isCreate = this.services.get(registrationInfo.serviceName) == null;
117 this.services.put(toService(registrationInfo));
118 return new ResponseEntity<>("OK", isCreate ? HttpStatus.CREATED : HttpStatus.OK);
119 } catch (Exception e) {
120 return new ResponseEntity<>(e.getMessage(), HttpStatus.BAD_REQUEST);
124 @ApiOperation(value = "Delete a service")
127 @ApiResponse(code = 204, message = "OK"),
128 @ApiResponse(code = 404, message = "Service not found", response = String.class)})
129 @DeleteMapping("/services")
130 public ResponseEntity<String> deleteService(//
131 @RequestParam(name = "name", required = true) String serviceName) {
133 Service service = removeService(serviceName);
134 // Remove the policies from the repo and let the consistency monitoring
136 removePolicies(service);
137 return new ResponseEntity<>("OK", HttpStatus.NO_CONTENT);
138 } catch (Exception e) {
139 return new ResponseEntity<>(e.getMessage(), HttpStatus.NOT_FOUND);
143 @ApiOperation(value = "Heartbeat from a serice")
146 @ApiResponse(code = 200, message = "Service supervision timer refreshed, OK"),
147 @ApiResponse(code = 404, message = "The service is not found, needs re-registration")})
148 @PostMapping("/services/keepalive")
149 public ResponseEntity<String> keepAliveService(//
150 @RequestParam(name = "name", required = true) String serviceName) {
152 services.getService(serviceName).keepAlive();
153 return new ResponseEntity<>("OK", HttpStatus.OK);
154 } catch (ServiceException e) {
155 return new ResponseEntity<>(e.getMessage(), HttpStatus.NOT_FOUND);
159 private Service removeService(String name) throws ServiceException {
160 Service service = this.services.getService(name); // Just to verify that it exists
161 this.services.remove(service.getName());
165 private void removePolicies(Service service) {
166 Collection<Policy> policyList = this.policies.getForService(service.getName());
167 for (Policy policy : policyList) {
168 this.policies.remove(policy);
172 private Service toService(ServiceRegistrationInfo s) {
173 return new Service(s.serviceName, Duration.ofSeconds(s.keepAliveIntervalSeconds), s.callbackUrl);