--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP Policy Engine
+ * ================================================================================
+ * Copyright (C) 2018 Ericsson Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.brms.api.nexus;
+
+import com.google.gson.Gson;
+
+import java.net.URI;
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.ClientBuilder;
+import javax.ws.rs.client.Invocation.Builder;
+import javax.ws.rs.core.Response;
+
+import org.onap.policy.brms.api.nexus.pojo.NexusArtifact;
+import org.onap.policy.brms.api.nexus.pojo.NexusRepository;
+import org.onap.policy.brms.api.nexus.pojo.NexusSearchResult;
+import org.onap.policy.common.logging.flexlogger.FlexLogger;
+import org.onap.policy.common.logging.flexlogger.Logger;
+
+/**
+ * The Class NexusRestWrapper provides a Java API to a Nexus repository, wrapping the Nexus REST interface.
+ */
+public class NexusRestWrapper {
+ private static final Logger LOGGER = FlexLogger.getLogger(NexusRestWrapper.class.getName());
+
+ // A web client for issuing REST requests to the Nexus server
+ private final Client client;
+
+ // The URL of the Nexus server
+ private final String nexusServerUrl;
+
+ // Credentials for Nexus server logins
+ private String nexusUser;
+ private String nexusPassword;
+
+ /**
+ * Instantiates a new Nexus REST agent.
+ *
+ * @param nexusServerUrl the URL of the Nexus server as a string
+ * @throws NexusRestWrapperException on errors on the Nexus server URL
+ */
+ public NexusRestWrapper(final String nexusServerUrl) throws NexusRestWrapperException {
+ LOGGER.trace("new NexusRestWrapper: nexusServerUrl=" + nexusServerUrl);
+
+ if (isNullOrBlank(nexusServerUrl)) {
+ throw new NexusRestWrapperException("nexusServerUrl must be specified for the Nexus server");
+ }
+
+ this.nexusServerUrl = nexusServerUrl;
+
+ // Create a client for RST calls towards the Nexus server
+ client = ClientBuilder.newClient();
+ }
+
+ /**
+ * Instantiates a new Nexus REST agent with credentials.
+ *
+ * @param nexusServerUrl the URL of the Nexus server as a string
+ * @param nexusUser the Nexus userid
+ * @param nexusPassword the Nexus password
+ * @throws NexusRestWrapperException on parameter exceptions
+ */
+ public NexusRestWrapper(final String nexusServerUrl, final String nexusUser, final String nexusPassword)
+ throws NexusRestWrapperException {
+ LOGGER.trace("new NexusRestWrapper: nexusServerUrl=" + nexusServerUrl);
+
+ if (isNullOrBlank(nexusServerUrl)) {
+ throw new NexusRestWrapperException("nexusServerUrl must be specified for the Nexus server");
+ }
+
+ if (isNullOrBlank(nexusUser) || isNullOrBlank(nexusPassword)) {
+ throw new NexusRestWrapperException("nexuusUser and nexusPassword must both be specified");
+ }
+
+ this.nexusServerUrl = nexusServerUrl;
+ this.nexusUser = nexusUser;
+ this.nexusPassword = nexusPassword;
+
+ // Create a client for RST calls towards the Nexus server
+ client = ClientBuilder.newClient();
+
+ LOGGER.trace("NexusRestWrapper created: nexusServerUrl=" + nexusServerUrl);
+ }
+
+ /**
+ * Close the REST client.
+ */
+ public void close() {
+ LOGGER.trace("NexusRestWrapper closing: url=" + nexusServerUrl);
+
+ // Close the web client
+ client.close();
+
+ LOGGER.trace("NexusRestWrapper closed: url=" + nexusServerUrl);
+ }
+
+ /**
+ * Find an artifact in the Nexus server.
+ *
+ * @param searchParameters
+ * the search parameters to use for the search
+ * @return the list of artifacts found that match the requested artifact
+ * @throws NexusRestWrapperException
+ * Exceptions accessing the Nexus server
+ */
+ public NexusSearchResult findArtifact(final NexusRestSearchParameters searchParameters)
+ throws NexusRestWrapperException {
+
+ LOGGER.trace("new search with search parameters: " + searchParameters);
+
+ // Issue the REST request to perform the search
+ URI searchUri = searchParameters.getSearchUri(nexusServerUrl);
+
+ LOGGER.debug("search URI is: " + searchUri.toString());
+
+ // Compose the REST request
+ Builder requestBuilder = client.target(searchUri).request("application/json");
+ getAuthorizationHeader(requestBuilder);
+
+ // Issue the REST request
+ Response response = requestBuilder.get();
+
+ LOGGER.debug("search response is: " + response.toString());
+
+ // Check the HTTP response code for the search
+ if (Response.Status.OK.getStatusCode() != response.getStatus()) {
+ LOGGER.warn("search to URI " + searchUri.toString() + "failed, response was: " + response.toString());
+ throw new NexusRestWrapperException("query to Nexus failed with message: " + response.toString());
+ }
+
+ try {
+ // Get the JSON string with the the search result
+ String responseString = response.readEntity(String.class);
+
+ // Parse the returned JSON into result POJOs
+ NexusSearchResult searchResult = new Gson().fromJson(responseString, NexusSearchResult.class);
+
+ // We now need to expand the release and snapshot URL paths for each artifact
+ expandArtifactUrlPaths(searchResult);
+
+ return searchResult;
+ } catch (Exception e) {
+ LOGGER.warn("processing of result from search to URI " + searchUri
+ + " failed with message " + e.getMessage());
+ throw new NexusRestWrapperException(
+ "processing of result from query to Nexus failed with message: " + e.getMessage(), e);
+ }
+ }
+
+ /**
+ * Get the authorisation header for the user name and password.
+ * @param requestBuilder the request builder to add authorization to
+ * @return the authorisation header
+ */
+ private Builder getAuthorizationHeader(Builder requestBuilder) {
+ if (null != nexusUser && null != nexusPassword) {
+ String userPassString = nexusUser + ":" + nexusPassword;
+ requestBuilder.header("Authorization", "Basic "
+ + java.util.Base64.getEncoder().encodeToString(userPassString.getBytes()));
+ }
+
+ return requestBuilder;
+ }
+
+ /**
+ * Use the Repository URLs in the search result to create a release and snapshot URL path for each artifact.
+ * @param searchResult the results of a Nexus server search
+ */
+ private void expandArtifactUrlPaths(NexusSearchResult searchResult) {
+ // Create a map of repositories for doing lookups
+ Map<String, NexusRepository> repositoryMap = new HashMap<>();
+
+ for (NexusRepository repository : searchResult.getRepoDetailsList()) {
+ repositoryMap.put(repository.getRepositoryId(), repository);
+ }
+
+ for (NexusArtifact artifact : searchResult.getArtifactList()) {
+ artifact.setUrlPath(composeArtifactUrlPath(repositoryMap, artifact));
+ }
+ }
+
+ /**
+ * Compose an artifact URL path using the repository and artifact details for the artifact.
+ * @param repositoryMap the available repositories
+ * @param artifact the artifact
+ * @return the URL path
+ */
+ private String composeArtifactUrlPath(Map<String, NexusRepository> repositoryMap, NexusArtifact artifact) {
+ // We always have one hit
+ NexusRepository repository = repositoryMap.get(artifact.getArtifactHits().get(0).getRepositoryId());
+
+ return new StringBuilder()
+ .append(repository.getRepositoryUrl())
+ .append("/content/")
+ .append(artifact.getGroupId().replace('.', '/'))
+ .append('/')
+ .append(artifact.getArtifactId())
+ .append('/')
+ .append(artifact.getVersion())
+ .append('/')
+ .append(artifact.getArtifactId())
+ .append('-')
+ .append(artifact.getVersion())
+ .toString();
+ }
+
+ /**
+ * Check if a string is null or all white space.
+ */
+ private boolean isNullOrBlank(final String parameter) {
+ return null == parameter || parameter.trim().isEmpty();
+ }
+}
Code Review / policy / engine.git / blobdiff