Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF 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 org.apache.wink.itest.cachetest; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import java.util.HashMap; import java.util.Locale; import java.util.Map; import java.util.TimeZone; import javax.ws.rs.core.Response; import junit.framework.TestCase; import org.apache.commons.httpclient.HttpClient; import org.apache.commons.httpclient.HttpMethod; import org.apache.commons.httpclient.methods.PostMethod; import org.apache.wink.itest.cache.NewsStory; import org.apache.wink.test.integration.ServerEnvironmentInfo; public class ClientTest extends TestCase { final private static String NEWS_BASE_URI = ServerEnvironmentInfo.getBaseURI() + ((ServerEnvironmentInfo.isRestFilterUsed()) ? "" : "/cache") + "/news"; private static final DateFormat formatter = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz", Locale.ENGLISH); static { formatter.setLenient(false); formatter.setTimeZone(TimeZone.getTimeZone("GMT")); } @Override public void setUp() { /* * clear the database entries */ HttpClient client = new HttpClient(); HttpMethod method = null; try { System.out.println(NEWS_BASE_URI + "/clear"); method = new PostMethod(NEWS_BASE_URI + "/clear"); client.executeMethod(method); assertEquals(204, method.getStatusCode()); } catch (Exception e) { e.printStackTrace(); fail(e.getMessage()); } finally { if (method != null) { method.releaseConnection(); } } } /** * This test will demonstrate various usages of the ETag and 'If-Match' * headers. It will show how different scenarios result in different HTTP * status codes and different response entities. */ public void testNewsResourceWithETag() throws Exception { // always start with a fresh set of resources for testing purposes // first create the resource NewsStory story = new NewsStory(); story.setContent("This is a breaking news story"); story.setTitle("Local Hero Saves Kid"); NewsHttpClient client = new NewsHttpClient(NEWS_BASE_URI, null); Response response = client.addNewsStory(story); assertNotNull(response); String location = (String) response.getMetadata().getFirst("Location"); String etag = (String) response.getMetadata().getFirst("ETag"); // now send a request with an 'If-Match' with a matching value, // we should get back a 304 Map<String, String> reqHdrs = new HashMap<String, String>(); reqHdrs.put("If-Match", etag); client = new NewsHttpClient(NEWS_BASE_URI, reqHdrs); location = location.startsWith("/") ? location.substring(1) : location; response = client.getNewsStory("Local%20Hero%20Saves%20Kid"); assertNotNull(response); assertEquals("Expected 200 not returned", response.getStatus(), 200); // update the content of the story client = new NewsHttpClient(NEWS_BASE_URI, null); String newContent = "A local man rescued a kid from a burning building"; story.setContent(newContent); response = client.updateNewsStory(story); String updatedETag = (String) response.getMetadata().getFirst("ETag"); assertNotNull(updatedETag); // now try to get with the old ETag value, we should get a 412 // back indicating our precondition failed client = new NewsHttpClient(NEWS_BASE_URI, reqHdrs); location = location.startsWith("/") ? location.substring(1) : location; response = client.getNewsStory("Local%20Hero%20Saves%20Kid"); assertNotNull(response); assertNull(response.getEntity()); assertEquals("Expected 412 not returned", response.getStatus(), 412); // now ensure that using the ETag we got back on the PUT results // in a 304 status reqHdrs.put("If-Match", updatedETag); client = new NewsHttpClient(NEWS_BASE_URI, reqHdrs); location = location.startsWith("/") ? location.substring(1) : location; response = client.getNewsStory("Local%20Hero%20Saves%20Kid"); assertNotNull(response); assertEquals("Expected 200 not returned", response.getStatus(), 200); } /** * This test will demonstrate various usages of the Last-Modified header. It * will show how different scenarios result in different HTTP status codes * and different response entities. */ public void testNewsResourceWithLastModified() throws Exception { // first create the resource NewsStory story = new NewsStory(); story.setContent("This is a breaking news story"); story.setTitle("Local Hero Saves Kid"); NewsHttpClient client = new NewsHttpClient(NEWS_BASE_URI, null); Response response = client.addNewsStory(story); assertNotNull(response); String lastModified = (String) response.getMetadata().getFirst("Last-Modified"); Date date = formatter.parse(lastModified); Map<String, String> reqHdrs = new HashMap<String, String>(); reqHdrs.put("If-Modified-Since", lastModified); client = new NewsHttpClient(NEWS_BASE_URI, reqHdrs); response = client.getNewsStory("Local%20Hero%20Saves%20Kid"); assertNotNull(response); assertEquals("Expected 304 not returned", 304, response.getStatus()); Calendar calendar = Calendar.getInstance(); calendar.setTime(date); calendar.set(Calendar.YEAR, 2006); lastModified = formatter.format(calendar.getTime()); reqHdrs.put("If-Modified-Since", lastModified); client = new NewsHttpClient(NEWS_BASE_URI, reqHdrs); response = client.getNewsStory("Local%20Hero%20Saves%20Kid"); assertNotNull(response); story = (NewsStory) response.getEntity(); assertNotNull(story); } }