Java tutorial
/* * Copyright (C) 2016 Red Hat, inc., and individual contributors * as indicated by the @author tags. See the copyright.txt file in the * distribution for a full listing of individual contributors. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301 USA */ package org.wildfly.kubernetes.configmap; import com.squareup.okhttp.MediaType; import com.squareup.okhttp.OkHttpClient; import com.squareup.okhttp.Request; import com.squareup.okhttp.RequestBody; import com.squareup.okhttp.Response; import com.squareup.okhttp.logging.HttpLoggingInterceptor; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.net.HttpURLConnection; import java.nio.charset.StandardCharsets; import java.nio.file.Files; import java.nio.file.Path; import java.util.Collection; import java.util.Collections; import java.util.HashMap; import java.util.Map; import java.util.logging.Level; import java.util.logging.Logger; import okio.BufferedSink; import org.jboss.dmr.ModelNode; /** * * @author <a href="mailto:ehugonne@redhat.com">Emmanuel Hugonnet</a> (c) 2015 Red Hat, inc. */ public class ConfigMapOperations { /** * @param args the command line arguments */ public static void main(String[] args) { try { final OkHttpClient client = new OkHttpClient(); client.interceptors().add(new HttpLoggingInterceptor().setLevel(HttpLoggingInterceptor.Level.BODY)); Map<String, String> labels = new HashMap<>(); labels.put("component", "wildfly"); Path file = new File( "/home/ehsavoie/dev/wildfly/core/dist/target/wildfly-core-2.1.0.CR3-SNAPSHOT/standalone/configuration/standalone.xml") .toPath(); String name = "test"; String namespace = "default"; ConfigMapOperations ops = new ConfigMapOperations(); if (ops.configMapExists(client, namespace, name)) { ops.deleteConfigMap(client, namespace, name); } ops.createConfigMap(client, namespace, name, labels, Collections.singleton(file)); ops.createConfigMap(client, namespace, name, labels, Collections.singleton(file)); labels.put("status", "experimental"); ops.updateConfigMap(client, namespace, name, labels, Collections.singleton(file)); ops.configMapExists(client, namespace, name); // ops.deleteConfigMap(client, namespace, name); } catch (IOException ex) { Logger.getLogger(ConfigMapOperations.class.getName()).log(Level.SEVERE, null, ex); } } public void createConfigMap(OkHttpClient client, String namespace, String name, Map<String, String> labels, Collection<Path> files) throws IOException { Request request = new Request.Builder().url(buildUrl(namespace, null)) .post(createJsonPayload(namespace, name, labels, files)).build(); Response response = client.newCall(request).execute(); if (HttpURLConnection.HTTP_CREATED != response.code()) { readStatusResponse(response); } } public void deleteConfigMap(OkHttpClient client, String namespace, String name) throws IOException { Request request = new Request.Builder().url(buildUrl(namespace, name)).delete().build(); Response response = client.newCall(request).execute(); if (HttpURLConnection.HTTP_OK != response.code()) { readStatusResponse(response); } } public boolean configMapExists(OkHttpClient client, String namespace, String name) throws IOException { Request request = new Request.Builder().url(buildUrl(namespace, name)).get().build(); return HttpURLConnection.HTTP_OK == client.newCall(request).execute().code(); } public void updateConfigMap(OkHttpClient client, String namespace, String name, Map<String, String> labels, Collection<Path> files) throws IOException { Request request = new Request.Builder().url(buildUrl(namespace, name)) .put(createJsonPayload(namespace, name, labels, files)).build(); Response response = client.newCall(request).execute(); if (HttpURLConnection.HTTP_OK != response.code()) { readStatusResponse(response); } } private String buildUrl(String namespace, String name) { if (name != null && !name.isEmpty()) { return String.format("http://localhost:8080/api/v1/namespaces/%s/configmaps/%s", namespace, name); } return String.format("http://localhost:8080/api/v1/namespaces/%s/configmaps", namespace); } public RequestBody createJsonPayload(String namespace, String name, Map<String, String> labels, Collection<Path> files) throws IOException { return new RequestBody() { @Override public MediaType contentType() { return MediaType.parse("application/json"); } @Override public void writeTo(BufferedSink sink) throws IOException { ModelNode model = new ModelNode().setEmptyObject(); model.get("kind").set("ConfigMap"); model.get("apiVersion").set("v1"); ModelNode metadataNode = model.get("metadata").setEmptyObject(); metadataNode.get("name").set(name); metadataNode.get("namespace").set(namespace); if (!labels.isEmpty()) { ModelNode labelsNode = model.get("labels").setEmptyObject(); for (Map.Entry<String, String> label : labels.entrySet()) { labelsNode.get(label.getKey()).set(label.getValue()); } } ModelNode dataNode = model.get("data").setEmptyObject(); for (Path file : files) { dataNode.get(file.getFileName().toString()) .set(new String(Files.readAllBytes(file), StandardCharsets.UTF_8)); } try (PrintWriter out = new PrintWriter(sink.outputStream(), true)) { model.writeJSONString(out, true); } } }; } public void readStatusResponse(Response response) throws IOException { try (InputStream in = response.body().byteStream()) { ModelNode responseNode = ModelNode.fromJSONStream(in); if (responseNode.hasDefined("kind") && responseNode.hasDefined("message") && "Status".equals(responseNode.get("kind").asString())) { throw new IOException(responseNode.get("message").asString()); } } } }