Java tutorial
/** * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=# * This file is part of the LDP4j Project: * http://www.ldp4j.org/ * * Center for Open Middleware * http://www.centeropenmiddleware.com/ * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=# * Copyright (C) 2014 Center for Open Middleware. * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=# * 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. * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=# * Artifact : org.ldp4j.framework:ldp4j-server-core:1.0.0-SNAPSHOT * Bundle : ldp4j-server-core-1.0.0-SNAPSHOT.jar * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=# */ package org.ldp4j.server; import java.io.IOException; import java.net.URI; import java.net.URISyntaxException; import java.net.URL; import java.util.Arrays; import org.apache.http.Header; import org.apache.http.HttpEntity; import org.apache.http.HttpHeaders; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.ResponseHandler; import org.apache.http.client.methods.HttpUriRequest; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.util.EntityUtils; import org.jboss.shrinkwrap.api.ShrinkWrap; import org.jboss.shrinkwrap.api.spec.JavaArchive; import org.ldp4j.server.impl.JSONLDMediaTypeProvider; import org.ldp4j.server.impl.RDFXMLMediaTypeProvider; import org.ldp4j.server.impl.RuntimeInstanceImpl; import org.ldp4j.server.impl.TurtleMediaTypeProvider; import org.ldp4j.server.spi.IMediaTypeProvider; import org.ldp4j.server.spi.RuntimeInstance; import org.slf4j.Logger; import com.google.common.base.Joiner; public final class ServerFrontendTestHelper { private final Logger logger; private final CloseableHttpClient httpclient; private URL url; private boolean legacy; public ServerFrontendTestHelper(Logger logger) { this.logger = logger; this.legacy = true; this.httpclient = HttpClients.createDefault(); } public void base(URL url) { this.url = url; } public void setLegacy(boolean legacy) { this.legacy = legacy; } private URI resolve(String... path) throws URISyntaxException { return url.toURI().resolve(Joiner.on("/").join(Arrays.asList(path))); } public String relativize(String location) throws URISyntaxException { String path = this.url.toURI().relativize(URI.create(location)).toString(); String prefix = "ldp4j/api/"; if (this.legacy) { prefix = "ldp4j/legacy"; } if (path.startsWith(prefix)) { path = path.substring(prefix.length()); } return path; } private URI resourceLocation(String path) throws URISyntaxException { String subpath = "ldp4j/api"; if (this.legacy) { subpath = "ldp4j/legacy"; } return resolve(subpath, path); } public <T extends HttpUriRequest> T newRequest(String path, Class<? extends T> clazz) { try { return clazz.getConstructor(URI.class).newInstance(resourceLocation(path)); } catch (Exception e) { throw new IllegalStateException("Could not create request", e); } } public static class Metadata { public String body; public String etag; public String lastModified; public String location; } public Metadata httpRequest(final HttpUriRequest request) throws Exception { final Metadata metadata = new Metadata(); ResponseHandler<String> responseHandler = new ResponseHandler<String>() { public String handleResponse(final HttpResponse response) throws ClientProtocolException, IOException { String responseBody = logResponse(response); // TODO: Add validation mechanism here metadata.body = responseBody; Header etagHeader = response.getFirstHeader(HttpHeaders.ETAG); if (etagHeader != null) { metadata.etag = etagHeader.getValue(); } Header lastModifiedHeader = response.getFirstHeader(HttpHeaders.LAST_MODIFIED); if (lastModifiedHeader != null) { metadata.lastModified = lastModifiedHeader.getValue(); } Header locationHeader = response.getFirstHeader(HttpHeaders.LOCATION); if (locationHeader != null) { metadata.location = locationHeader.getValue(); } return responseBody; } private final String NL = System.getProperty("line.separator"); private String logResponse(final HttpResponse response) throws IOException { HttpEntity entity = response.getEntity(); String responseBody = entity != null ? EntityUtils.toString(entity) : null; if (logger.isDebugEnabled()) { StringBuilder builder = new StringBuilder(); builder.append("-- REQUEST COMPLETED -------------------------").append(NL); builder.append("-- RESPONSE INIT -----------------------------").append(NL); builder.append(response.getStatusLine().toString()).append(NL); builder.append("-- RESPONSE HEADERS---------------------------").append(NL); for (org.apache.http.Header h : response.getAllHeaders()) { builder.append(h.getName() + " : " + h.getValue()).append(NL); } if (responseBody != null && responseBody.length() > 0) { builder.append("-- RESPONSE BODY -----------------------------").append(NL); builder.append(responseBody).append(NL); } builder.append("-- RESPONSE END ------------------------------"); logger.debug(builder.toString()); } return responseBody; } }; logger.debug("-- REQUEST INIT -------------------------------"); logger.debug(request.getRequestLine().toString()); httpclient.execute(request, responseHandler); return metadata; } public void shutdown() throws Exception { if (httpclient != null) { httpclient.close(); } } public static JavaArchive getServerArchive() { JavaArchive coreArchive = ShrinkWrap.create(JavaArchive.class, "ldp4j-server-core.jar") .addPackages(true, "org.ldp4j.server") .addAsResource(ClassLoader.getSystemResource("META-INF/web-fragment.xml"), "META-INF/web-fragment.xml") .addAsResource(ClassLoader.getSystemResource("beans.xml"), "beans.xml") .addAsServiceProvider(RuntimeInstance.class, RuntimeInstanceImpl.class) .addAsServiceProvider(IMediaTypeProvider.class, TurtleMediaTypeProvider.class, RDFXMLMediaTypeProvider.class, JSONLDMediaTypeProvider.class); return coreArchive; } }