Java tutorial
/* * Copyright 2016 Red Hat, Inc. * * Red Hat licenses this file to you 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 io.fabric8.maven.plugin.mojo.internal; import com.fasterxml.jackson.annotation.JsonIgnore; import com.fasterxml.jackson.annotation.JsonInclude; import com.fasterxml.jackson.databind.ObjectMapper; import io.fabric8.kubernetes.api.Annotations; import io.fabric8.kubernetes.api.KubernetesHelper; import io.fabric8.maven.core.util.VersionUtil; import io.fabric8.utils.Strings; import org.apache.maven.plugin.MojoExecutionException; import org.apache.maven.plugin.MojoFailureException; import org.apache.maven.plugins.annotations.Mojo; import org.apache.maven.plugins.annotations.Parameter; import java.io.File; import java.io.FileWriter; import java.io.IOException; import java.io.PrintWriter; import java.util.Comparator; import java.util.List; import java.util.Map; import java.util.Set; import java.util.SortedSet; import java.util.TreeMap; import java.util.TreeSet; import static io.fabric8.utils.Strings.isNullOrBlank; /** * Generates a Manifest index file by querying a maven repository * to find all the Kubernetes and OpenShift manifests available and their releases. */ @Mojo(name = "manifest-index") public class ManifestIndexMojo extends AbstractArtifactSearchMojo { /** * The HTML title */ @Parameter(property = "fabric8.manifest.indexTitle", defaultValue = "Manifest Repository") private String manifestTitle; /** * The Kubernetes introduction HTML output before the table */ @Parameter(property = "fabric8.manifest.kubernetes.introductionHtmlFile", defaultValue = "${basedir}/src/main/fabric8/site/kubernetes-introduction.html") private File kubernetesIntroductionHtmlFile; /** * The OpenShift introduction HTML output before the table */ @Parameter(property = "fabric8.manifest.openshift.introductionHtmlFile", defaultValue = "${basedir}/src/main/fabric8/site/openshift-introduction.html") private File openshiftIntroductionHtmlFile; /** * The Kubernetes HTML for the <head> element */ @Parameter(property = "fabric8.manifest.kubernetes.headHtmlFile", defaultValue = "${basedir}/src/main/fabric8/site/kubernetes-head.html") private File kubernetesHeadHtmlFile; /** * The OpenShift HTML for the <head> element */ @Parameter(property = "fabric8.manifest.openshift.headHtmlFile", defaultValue = "${basedir}/src/main/fabric8/site/openshift-head.html") private File openshiftHeadHtmlFile; /** * The Kubernetes HTML for the footer at the end of the <body> element */ @Parameter(property = "fabric8.manifest.kubernetes.headHtmlFile", defaultValue = "${basedir}/src/main/fabric8/site/kubernetes-footer.html") private File kubernetesFooterHtmlFile; /** * The OpenShift HTML for the footer at the end of the <body> element */ @Parameter(property = "fabric8.manifest.openshift.headHtmlFile", defaultValue = "${basedir}/src/main/fabric8/site/openshift-footer.html") private File openshiftFooterHtmlFile; /** * The output YAML file */ @Parameter(property = "fabric8.manifest.outputYamlFile", defaultValue = "${project.build.directory}/fabric8/site/manifests/index.yaml") private File outputFile; /** * The output HTML file */ @Parameter(property = "fabric8.manifest.outputHtmlDir", defaultValue = "${project.build.directory}/fabric8/site/manifests") private File outputHtmlDir; /** * Folder where to find project specific files */ @Parameter(property = "fabric8.manifest.tempDir", defaultValue = "${project.build.directory}/fabric8/tmp-manifests") private File tempDir; @Parameter(property = "fabric8.manifest.index.maxVersionsPerApp", defaultValue = "8") private int maxVersionsPerApp; private static String getDescription(ManifestInfo manifestInfo) { String answer = manifestInfo.getDescription(); return answer != null ? answer : ""; } protected static String getVersion(ManifestInfo manifestInfo) { return manifestInfo.getVersion(); } @Override public void executeInternal() throws MojoExecutionException, MojoFailureException { outputFile.getParentFile().mkdirs(); log.info("Creating Manifest Index file at: %s", outputFile); List<ArtifactDTO> artifacts = searchMaven("?q=l:%22kubernetes%22"); Map<String, ManifestInfo> manifests = new TreeMap<>(); for (ArtifactDTO artifact : artifacts) { addManifestInfo(manifests, artifact); } Set<Map.Entry<String, ManifestInfo>> entries = manifests.entrySet(); for (Map.Entry<String, ManifestInfo> entry : entries) { getLog().debug("" + entry.getKey() + " = " + entry.getValue()); } try { ObjectMapper mapper = KubernetesHelper.createYamlObjectMapper(); mapper.writeValue(outputFile, manifests); } catch (IOException e) { throw new MojoExecutionException("Failed to write results as YAML to: " + outputFile + ". " + e, e); } generateHTML(new File(outputHtmlDir, "kubernetes.html"), manifests, true, kubernetesIntroductionHtmlFile, kubernetesHeadHtmlFile, kubernetesFooterHtmlFile); generateHTML(new File(outputHtmlDir, "openshift.html"), manifests, false, openshiftIntroductionHtmlFile, openshiftHeadHtmlFile, openshiftFooterHtmlFile); } protected void generateHTML(File outputHtmlFile, Map<String, ManifestInfo> manifests, boolean kubernetes, File introductionHtmlFile, File headHtmlFile, File footerHtmlFile) throws MojoExecutionException { Map<String, SortedSet<ManifestInfo>> manifestMap = new TreeMap<>(); for (ManifestInfo manifestInfo : manifests.values()) { String key = manifestInfo.getName(); SortedSet<ManifestInfo> set = manifestMap.get(key); if (set == null) { set = new TreeSet<>(createManifestComparator()); manifestMap.put(key, set); } set.add(manifestInfo); } try (PrintWriter writer = new PrintWriter(new FileWriter(outputHtmlFile))) { writer.println("<html>"); writer.println("<head>"); writer.println(getHtmlFileContentOrDefault(headHtmlFile, "<link href='style.css' rel=stylesheet>\n" + "<link href='custom.css' rel=stylesheet>\n" + "<title>" + manifestTitle + "</title>\n")); writer.println("</head>"); writer.println("<body>"); writer.println(getHtmlFileContentOrDefault(introductionHtmlFile, "<h1>" + manifestTitle + "</h1>")); writer.println("<table class='table table-striped table-hover'>"); writer.println(" <hhead>"); writer.println(" <tr>"); writer.println(" <th>Manifest</th>"); writer.println(" <th>Versions</th>"); writer.println(" </tr>"); writer.println(" </hhead>"); writer.println(" <tbody>"); for (Map.Entry<String, SortedSet<ManifestInfo>> entry : manifestMap.entrySet()) { String key = entry.getKey(); SortedSet<ManifestInfo> set = entry.getValue(); if (!set.isEmpty()) { ManifestInfo first = set.first(); first.configure(this); if (!first.isValid()) { continue; } String manifestDescription = getDescription(first); writer.println(" <tr>"); writer.println(" <td title='" + manifestDescription + "'>"); String iconHtml = ""; String iconUrl = findIconURL(set); if (Strings.isNotBlank(iconUrl)) { iconHtml = "<img class='logo' src='" + iconUrl + "'>"; } writer.println(" " + iconHtml + "<span class='manifest-name'>" + key + "</span>"); writer.println(" </td>"); writer.println(" <td class='versions'>"); int count = 0; for (ManifestInfo manifestInfo : set) { if (maxVersionsPerApp > 0 && ++count > maxVersionsPerApp) { break; } String description = getDescription(manifestInfo); String version = manifestInfo.getVersion(); String href = kubernetes ? manifestInfo.getKubernetesUrl() : manifestInfo.getOpenShiftUrl(); String versionId = manifestInfo.getId(); String command = kubernetes ? "kubectl" : "oc"; writer.println( " <a class='btn btn-default' role='button' data-toggle='collapse' href='#" + versionId + "' aria-expanded='false' aria-controls='" + versionId + "' title='" + description + "'>\n" + version + "\n" + "</a>\n" + "<div class='collapse' id='" + versionId + "'>\n" + " <div class='well'>\n" + " <p>To install version <b>" + version + "</b> of <b>" + key + "</b> type the following command:</p>\n" + " <code>" + command + " apply -f " + href + "</code>\n" + " <div class='version-buttons'><a class='btn btn-primary' title='Download the YAML manifest for " + key + " version " + version + "' href='" + href + "'><i class='fa fa-download' aria-hidden='true'></i> Download Manifest</a> " + "<a class='btn btn-primary' target='gofabric8' title='Run this application via the go.fabric8.io website' href='https://go.fabric8.io/?manifest=" + href + "'><i class='fa fa-external-link' aria-hidden='true'></i> Run via browser</a></div>\n" + " </div>\n" + "</div>"); } writer.println(" </td>"); writer.println(" </tr>"); } } writer.println(" </tbody>"); writer.println(" </table>"); writer.println(getHtmlFileContentOrDefault(footerHtmlFile, "")); writer.println("</body>"); } catch (IOException e) { throw new MojoExecutionException("Failed to write to " + outputHtmlFile + ". " + e, e); } } private String findIconURL(Iterable<ManifestInfo> manifestInfos) { for (ManifestInfo manifestInfo : manifestInfos) { String icon = manifestInfo.getIcon(); if (Strings.isNotBlank(icon)) { return icon; } } return "https://fabric8.io/images/logos/kubernetes.png"; } private Comparator<ManifestInfo> createManifestComparator() { return new Comparator<ManifestInfo>() { @Override public int compare(ManifestInfo c1, ManifestInfo c2) { String v1 = getVersion(c1); String v2 = getVersion(c2); int answer = VersionUtil.compareVersions(v1, v2); // lets sort in reverse order if (answer > 0) { return -1; } else if (answer < 0) { return 1; } return 0; } }; } protected void addManifestInfo(Map<String, ManifestInfo> manifests, ArtifactDTO artifact) { List<String> ec = artifact.getEc(); if (ec != null && ec.indexOf("-openshift.yml") >= 0 && ec.indexOf("-openshift.yml") >= 0) { // lets create the latest manifest ManifestInfo latest = new ManifestInfo(mavenRepoUrl, artifact); String key = artifact.createKey(); manifests.put(key, latest); } } @JsonInclude(JsonInclude.Include.NON_EMPTY) protected class ManifestInfo { @JsonIgnore private final ArtifactDTO artifact; private String kubernetesUrl; private String openShiftUrl; private String icon; private String name; private String version; private String description; private String buildUrl; private String gitUrl; private String gitCommit; private String docsUrl; @JsonIgnore private Object kubernetesManifest; @JsonIgnore private Object openShiftManifest; public ManifestInfo(String mavenRepoUrl, ArtifactDTO artifact) { this.artifact = artifact; this.version = artifact.getV(); String artifactId = artifact.getA(); String urlPrefix = mavenRepoUrl + artifact.getG().replace('.', '/') + "/" + artifactId + "/" + version + "/" + artifactId + "-" + version; this.kubernetesUrl = urlPrefix + "-kubernetes.yml"; this.openShiftUrl = urlPrefix + "-openshift.yml"; this.name = artifactId; } private void updateFromManifest(Object manifest) { if (isNullOrBlank(description)) { description = findManifestAnnotation(manifest, "description"); } if (isNullOrBlank(icon)) { icon = convertRelativeIcon(findManifestIcon(manifest)); } if (isNullOrBlank(buildUrl)) { buildUrl = findManifestAnnotation(manifest, Annotations.Builds.BUILD_URL); } if (isNullOrBlank(gitUrl)) { gitUrl = findManifestAnnotation(manifest, Annotations.Builds.GIT_URL); } if (isNullOrBlank(gitCommit)) { gitCommit = findManifestAnnotation(manifest, Annotations.Builds.GIT_COMMIT); } if (isNullOrBlank(docsUrl)) { docsUrl = findManifestAnnotation(manifest, Annotations.Builds.DOCS_URL); } } @Override public String toString() { return "ManifestInfo{" + "name='" + name + '\'' + ", version='" + version + '\'' + '}'; } public void configure(AbstractArtifactSearchMojo mojo) { // if we could load the manifestfile lets add it if (kubernetesManifest == null) { Object manifest = mojo.loadKubernetesManifestFile(artifact); setKubernetesManifest(manifest); if (manifest == null) { mojo.getLog().warn("Could not find kubernetes manifest for " + this); } } if (openShiftManifest == null) { Object manifest = mojo.loadOpenShiftManifestFile(artifact); setOpenShiftManifest(manifest); if (manifest == null) { mojo.getLog().warn("Could not find openshift manifest for " + this); } } } public String getKubernetesUrl() { return kubernetesUrl; } public void setKubernetesUrl(String kubernetesUrl) { this.kubernetesUrl = kubernetesUrl; } public String getOpenShiftUrl() { return openShiftUrl; } public void setOpenShiftUrl(String openShiftUrl) { this.openShiftUrl = openShiftUrl; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getVersion() { return version; } public void setVersion(String version) { this.version = version; } public String getDescription() { return description; } public void setDescription(String description) { this.description = description; } public String getIcon() { return icon; } public void setIcon(String icon) { this.icon = icon; } public Object getKubernetesManifest() { return kubernetesManifest; } public void setKubernetesManifest(Object kubernetesManifest) { this.kubernetesManifest = kubernetesManifest; updateFromManifest(kubernetesManifest); } public Object getOpenShiftManifest() { return openShiftManifest; } public void setOpenShiftManifest(Object openShiftManifest) { this.openShiftManifest = openShiftManifest; updateFromManifest(kubernetesManifest); } public String getBuildUrl() { return buildUrl; } public void setBuildUrl(String buildUrl) { this.buildUrl = buildUrl; } public String getGitUrl() { return gitUrl; } public void setGitUrl(String gitUrl) { this.gitUrl = gitUrl; } public String getGitCommit() { return gitCommit; } public void setGitCommit(String gitCommit) { this.gitCommit = gitCommit; } public String getDocsUrl() { return docsUrl; } public void setDocsUrl(String docsUrl) { this.docsUrl = docsUrl; } public boolean isValid() { return kubernetesManifest != null && openShiftManifest != null && kubernetesUrl != null && openShiftUrl != null; } /** * Returns an ID we can use as a target in HTML / bootstrap / kquery * @return */ public String getId() { String answer = name + "_" + version; answer = answer.replace('.', '_').replace('-', '_'); return answer; } } }