Hyunsun Moon | 7ad9220 | 2016-04-20 10:36:02 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2016-present Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.xosclient.impl; |
| 17 | |
| 18 | import com.fasterxml.jackson.databind.JsonNode; |
| 19 | import com.fasterxml.jackson.databind.ObjectMapper; |
| 20 | import com.google.common.base.Strings; |
| 21 | import com.google.common.collect.Sets; |
| 22 | import org.onosproject.xosclient.api.VtnServiceApi; |
| 23 | import org.onosproject.xosclient.api.XosAccess; |
| 24 | import org.slf4j.Logger; |
| 25 | import org.slf4j.LoggerFactory; |
| 26 | |
| 27 | import java.io.IOException; |
| 28 | import java.util.Iterator; |
| 29 | import java.util.Map; |
| 30 | import java.util.Set; |
| 31 | |
| 32 | import static com.google.common.base.Preconditions.checkArgument; |
| 33 | import static com.google.common.base.Preconditions.checkNotNull; |
| 34 | |
| 35 | /** |
| 36 | * Provides CORD VTN service and service dependency APIs. |
| 37 | */ |
| 38 | public final class DefaultVtnServiceApi extends XosApi implements VtnServiceApi { |
| 39 | |
| 40 | private final Logger log = LoggerFactory.getLogger(getClass()); |
| 41 | |
| 42 | private static DefaultVtnServiceApi instance = null; |
| 43 | |
| 44 | /** |
| 45 | * Default constructor. |
| 46 | */ |
| 47 | private DefaultVtnServiceApi(String baseUrl, XosAccess access) { |
| 48 | super(baseUrl, access); |
| 49 | } |
| 50 | |
| 51 | /** |
| 52 | * Returns VTN service API instance. Creates a new instance only if base url or |
| 53 | * access has been changed. |
| 54 | * |
| 55 | * @param baseUrl base url |
| 56 | * @param access access |
| 57 | * @return vtn service api |
| 58 | */ |
| 59 | public static synchronized DefaultVtnServiceApi getInstance(String baseUrl, XosAccess access) { |
| 60 | checkNotNull(access, "XOS access information is null"); |
| 61 | checkArgument(!Strings.isNullOrEmpty(baseUrl), "VTN service API base url is null or empty"); |
| 62 | |
| 63 | if (instance == null || |
| 64 | !instance.baseUrl.equals(baseUrl) || |
| 65 | !instance.access.equals(access)) { |
| 66 | instance = new DefaultVtnServiceApi(baseUrl, access); |
| 67 | } |
| 68 | return instance; |
| 69 | } |
| 70 | |
| 71 | @Override |
| 72 | public Set<String> services() { |
| 73 | String response = restGet(EMPTY_STRING); |
| 74 | log.trace("Get services {}", response); |
| 75 | |
| 76 | ObjectMapper mapper = new ObjectMapper(); |
| 77 | try { |
| 78 | JsonNode nodes = mapper.readTree(response); |
| 79 | return Sets.newHashSet(nodes.fieldNames()); |
| 80 | } catch (IOException e) { |
| 81 | log.warn("Failed to get service list"); |
| 82 | return Sets.newHashSet(); |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | @Override |
| 87 | public Set<String> getProviderServices(String tServiceId) { |
| 88 | checkNotNull(tServiceId); |
| 89 | |
| 90 | String response = restGet(tServiceId); |
| 91 | log.trace("Get provider services {}", response); |
| 92 | |
| 93 | ObjectMapper mapper = new ObjectMapper(); |
| 94 | Set<String> pServices = Sets.newHashSet(); |
| 95 | |
| 96 | try { |
| 97 | JsonNode nodes = mapper.readTree(response); |
| 98 | nodes.forEach(node -> pServices.add(node.asText())); |
| 99 | } catch (IOException e) { |
| 100 | log.warn("Failed to get service dependency"); |
| 101 | } |
| 102 | return pServices; |
| 103 | } |
| 104 | |
| 105 | @Override |
| 106 | public Set<String> getTenantServices(String tServiceId) { |
| 107 | checkNotNull(tServiceId); |
| 108 | |
| 109 | String response = restGet(EMPTY_STRING); |
| 110 | log.trace("Get tenant services {}", response); |
| 111 | |
| 112 | ObjectMapper mapper = new ObjectMapper(); |
| 113 | Set<String> tServices = Sets.newHashSet(); |
| 114 | try { |
| 115 | JsonNode nodes = mapper.readTree(response); |
| 116 | Iterator<Map.Entry<String, JsonNode>> iterator = nodes.fields(); |
| 117 | |
| 118 | while (iterator.hasNext()) { |
| 119 | Map.Entry<String, JsonNode> entry = iterator.next(); |
| 120 | entry.getValue().forEach(pService -> { |
| 121 | if (pService.asText().equals(tServiceId)) { |
| 122 | tServices.add(entry.getKey()); |
| 123 | } |
| 124 | }); |
| 125 | } |
| 126 | } catch (IOException e) { |
| 127 | log.warn("Failed to get service list"); |
| 128 | } |
| 129 | return tServices; |
| 130 | } |
| 131 | } |