| /* |
| * Copyright 2016-present Open Networking Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.opencord.cordvtn.rest; |
| |
| import com.fasterxml.jackson.databind.JsonNode; |
| import com.fasterxml.jackson.databind.SerializationFeature; |
| import com.fasterxml.jackson.databind.node.ObjectNode; |
| import com.google.common.base.Strings; |
| import org.glassfish.jersey.client.ClientProperties; |
| import org.glassfish.jersey.client.authentication.HttpAuthenticationFeature; |
| import org.onosproject.rest.AbstractWebResource; |
| import org.slf4j.Logger; |
| |
| import javax.ws.rs.client.Client; |
| import javax.ws.rs.client.ClientBuilder; |
| import javax.ws.rs.client.Entity; |
| import javax.ws.rs.client.Invocation; |
| import javax.ws.rs.client.WebTarget; |
| import javax.ws.rs.core.MediaType; |
| import javax.ws.rs.core.Response; |
| import java.io.IOException; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| import static com.google.common.net.MediaType.JSON_UTF_8; |
| import static java.net.HttpURLConnection.HTTP_OK; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Implementation of REST client for XOS VTN networking service. |
| */ |
| public final class XosVtnNetworkingClient extends AbstractWebResource { |
| |
| protected final Logger log = getLogger(getClass()); |
| |
| private static final String URL_BASE = "/xosapi/v1/vtn/"; |
| |
| private static final String EMPTY_JSON_STRING = "{}"; |
| |
| private static final String VTN_ID = "id"; |
| private static final String VTN_RESYNC = "resync"; |
| private static final String VTN_SERVICES = "vtnservices"; |
| |
| private static final String ERR_LOG = "Received %s result with wrong format: %s"; |
| |
| private static final int DEFAULT_TIMEOUT_MS = 2000; |
| |
| private final String endpoint; |
| private final String user; |
| private final String password; |
| private final Client client = ClientBuilder.newClient(); |
| |
| private XosVtnNetworkingClient(String endpoint, String user, String password) { |
| this.endpoint = endpoint; |
| this.user = user; |
| this.password = password; |
| |
| client.register(HttpAuthenticationFeature.basic(user, password)); |
| client.property(ClientProperties.CONNECT_TIMEOUT, DEFAULT_TIMEOUT_MS); |
| client.property(ClientProperties.READ_TIMEOUT, DEFAULT_TIMEOUT_MS); |
| mapper().enable(SerializationFeature.INDENT_OUTPUT); |
| } |
| |
| private String restGet(String path) { |
| WebTarget wt = client.target("http://" + endpoint + URL_BASE).path(path); |
| Invocation.Builder builder = wt.request(JSON_UTF_8.toString()); |
| try { |
| Response response = builder.get(); |
| if (response.getStatus() != HTTP_OK) { |
| log.warn("Failed to get resource {}", endpoint + URL_BASE + path); |
| log.warn("reason {}", response.readEntity(String.class)); |
| return EMPTY_JSON_STRING; |
| } |
| } catch (javax.ws.rs.ProcessingException e) { |
| return EMPTY_JSON_STRING; |
| } |
| return builder.get(String.class); |
| } |
| |
| private String restPut(String path, JsonNode request) { |
| WebTarget wt = client.target("http://" + endpoint + URL_BASE).path(path); |
| Invocation.Builder builder = wt.request(MediaType.APPLICATION_JSON) |
| .accept(JSON_UTF_8.toString()); |
| |
| try { |
| Response response = builder.put(Entity.entity(request.toString(), |
| MediaType.APPLICATION_JSON_TYPE)); |
| String strResponse = response.readEntity(String.class); |
| if (response.getStatus() != HTTP_OK) { |
| throw new IllegalArgumentException("Failed to put resource " |
| + response.getStatus() + ": " + strResponse); |
| } |
| return strResponse; |
| } catch (javax.ws.rs.ProcessingException e) { |
| return EMPTY_JSON_STRING; |
| } |
| } |
| |
| public void requestSync() { |
| String response = restGet(VTN_SERVICES); |
| final String error = String.format(ERR_LOG, VTN_SERVICES, response); |
| try { |
| JsonNode jsonTree = mapper().readTree(response).path("items"); |
| if (!jsonTree.isArray() || jsonTree.size() < 1) { |
| throw new IllegalArgumentException(error); |
| } |
| JsonNode vtnService = jsonTree.get(0); |
| String vtnServiceId = vtnService.path(VTN_ID).asText(); |
| if (vtnServiceId == null || vtnServiceId.equals("")) { |
| throw new IllegalArgumentException(error); |
| } |
| log.info("Requesting sync for VTN service {}", vtnServiceId); |
| |
| ObjectNode request = mapper().createObjectNode() |
| .put(VTN_RESYNC, true); |
| |
| restPut(VTN_SERVICES + "/" + vtnServiceId, request); |
| } catch (IOException e) { |
| throw new IllegalArgumentException(error); |
| } |
| } |
| |
| /** |
| * Returns endpoint url for the XOS service API access. |
| * |
| * @return endpoint url as a string |
| */ |
| public String endpoint() { |
| return endpoint; |
| } |
| |
| /** |
| * Returns user name for the XOS service API access. |
| * |
| * @return user name as a string |
| */ |
| public String user() { |
| return user; |
| } |
| |
| /** |
| * Returns password for the XOS service API access. |
| * |
| * @return password as a string |
| */ |
| public String password() { |
| return password; |
| } |
| |
| /** |
| * Returns new XOS service networking builder instance. |
| * |
| * @return xos service networking builder |
| */ |
| public static Builder builder() { |
| return new Builder(); |
| } |
| |
| /** |
| * Builder of the XOS service networking entities. |
| */ |
| public static final class Builder { |
| |
| private String endpoint; |
| private String user; |
| private String password; |
| |
| private Builder() { |
| } |
| |
| /** |
| * Builds immutable XOS service networking instance. |
| * |
| * @return xos service networking instance |
| */ |
| public XosVtnNetworkingClient build() { |
| checkArgument(!Strings.isNullOrEmpty(endpoint)); |
| checkArgument(!Strings.isNullOrEmpty(user)); |
| checkArgument(!Strings.isNullOrEmpty(password)); |
| |
| return new XosVtnNetworkingClient(endpoint, user, password); |
| } |
| |
| /** |
| * Returns XOS service networking builder with the supplied endpoint. |
| * |
| * @param endpoint endpoint url |
| * @return xos service networking builder |
| */ |
| public Builder endpoint(String endpoint) { |
| this.endpoint = endpoint; |
| return this; |
| } |
| |
| /** |
| * Returns XOS service networking builder with the supplied user |
| * credential. |
| * |
| * @param user user |
| * @return xos service networking builder |
| */ |
| public Builder user(String user) { |
| this.user = user; |
| return this; |
| } |
| |
| /** |
| * Returns XOS service networking builder with the supplied password |
| * credential. |
| * |
| * @param password password |
| * @return xos service networking builder |
| */ |
| public Builder password(String password) { |
| this.password = password; |
| return this; |
| } |
| } |
| } |