restfus webservices获取数据的api方法

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2010-2014 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively,the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * http://glassfish.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software,include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable,add the following below the License Header,with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2,indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license,a
 * recipient has the option to distribute your version of this file under
 * either the CDDL,the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However,if you add GPL Version 2 code
 * and therefore,elected the GPL Version 2 license,then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */
package org.glassfish.jersey.examples.helloworld;

import java.net.HttpURLConnection;
import java.net.URL;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.logging.Logger;

import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.InvocationCallback;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriBuilder;

import org.glassfish.jersey.server.ResourceConfig;
import org.glassfish.jersey.test.JerseyTest;
import org.glassfish.jersey.test.TestProperties;

import org.junit.Ignore;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

public class HelloWorldTest extends JerseyTest {

    @Override
    protected ResourceConfig configure() {
        // mvn test -Djersey.config.test.container.factory=org.glassfish.jersey.test.inmemory.InMemoryTestContainerFactory
        // mvn test -Djersey.config.test.container.factory=org.glassfish.jersey.test.grizzly.GrizzlyTestContainerFactory
        // mvn test -Djersey.config.test.container.factory=org.glassfish.jersey.test.jdkhttp.JdkHttpServerTestContainerFactory
        // mvn test -Djersey.config.test.container.factory=org.glassfish.jersey.test.simple.SimpleTestContainerFactory
        enable(TestProperties.LOG_TRAFFIC);
        // enable(TestProperties.DUMP_ENTITY);
        return new ResourceConfig(HelloWorldResource.class);
    }

//    Uncomment to use Grizzly async client
//    @Override
//    protected void configureClient(ClientConfig clientConfig) {
//        clientConfig.connector(new GrizzlyConnector(clientConfig));
//    }

    @Test
    @Ignore("not compatible with test framework (doesn't use client())")
    public void testHelloWorld() throws Exception {
        URL getUrl = UriBuilder.fromUri(getBaseUri()).path(App.ROOT_PATH).build().toURL();
        HttpURLConnection connection = (HttpURLConnection) getUrl.openConnection();
        try {
            connection.setDoOutput(true);
            connection.setInstanceFollowRedirects(false);
            connection.setRequestMethod("GET");
            connection.setRequestProperty("Content-Type","text/plain");
            assertEquals(HttpURLConnection.HTTP_OK,connection.getResponseCode());
        } finally {
            connection.disconnect();
        }
    }

    @Test
    public void testConnection() {
        Response response = target().path(App.ROOT_PATH).request("text/plain").get();
        assertEquals(200,response.getStatus());
    }

    @Test
    public void testClientStringResponse() {
        String s = target().path(App.ROOT_PATH).request().get(String.class);
        System.out.println("最终返回的数据："+s);
        assertEquals(HelloWorldResource.CLICHED_MESSAGE,s);
    }

    @Test
    public void testAsyncClientRequests() throws InterruptedException {
        final int REQUESTS = 10;
        final CountDownLatch latch = new CountDownLatch(REQUESTS);
        final long tic = System.currentTimeMillis();
        for (int i = 0; i < REQUESTS; i++) {
            final int id = i;
            target().path(App.ROOT_PATH).request().async().get(new InvocationCallback<Response>() {
                @Override
                public void completed(Response response) {
                    try {
                        final String result = response.readEntity(String.class);
                        assertEquals(HelloWorldResource.CLICHED_MESSAGE,result);
                    } finally {
                        latch.countDown();
                    }
                }

                @Override
                public void failed(Throwable error) {
                    error.printStackTrace();
                    latch.countDown();
                }
            });
        }
        latch.await(10 * getAsyncTimeoutMultiplier(),TimeUnit.SECONDS);
        final long toc = System.currentTimeMillis();
        Logger.getLogger(HelloWorldTest.class.getName()).info("Executed in: " + (toc - tic));
    }

    @Test
    public void testHead() {
        Response response = target().path(App.ROOT_PATH).request().head();
        assertEquals(200,response.getStatus());
        assertEquals(MediaType.TEXT_PLAIN_TYPE,response.getMediaType());
    }

    @Test
    public void testFooBarOptions() {
        Response response = target().path(App.ROOT_PATH).request().header("Accept","foo/bar").options();
        assertEquals(200,response.getStatus());
        final String allowHeader = response.getHeaderString("Allow");
        _checkAllowContent(allowHeader);
        assertEquals("foo/bar",response.getMediaType().toString());
        assertEquals(0,response.getLength());
    }

    @Test
    public void testTextPlainOptions() {
        Response response = target().path(App.ROOT_PATH).request().header("Accept",MediaType.TEXT_PLAIN).options();
        assertEquals(200,response.getStatus());
        final String allowHeader = response.getHeaderString("Allow");
        _checkAllowContent(allowHeader);
        assertEquals(MediaType.TEXT_PLAIN_TYPE,response.getMediaType());
        final String responseBody = response.readEntity(String.class);
        _checkAllowContent(responseBody);
    }

    private void _checkAllowContent(final String content) {
        assertTrue(content.contains("GET"));
        assertTrue(content.contains("HEAD"));
        assertTrue(content.contains("OPTIONS"));
    }

    @Test
    public void testMissingResourceNotFound() {
        Response response;

        response = target().path(App.ROOT_PATH + "arbitrary").request().get();
        assertEquals(404,response.getStatus());

        response = target().path(App.ROOT_PATH).path("arbitrary").request().get();
        assertEquals(404,response.getStatus());
    }

    @Test
    public void testLoggingFilterClientClass() {
        Client client = client();
        client.register(CustomLoggingFilter.class).property("foo","bar");
        CustomLoggingFilter.preFilterCalled = CustomLoggingFilter.postFilterCalled = 0;
        String s = target().path(App.ROOT_PATH).request().get(String.class);
        assertEquals(HelloWorldResource.CLICHED_MESSAGE,s);
        assertEquals(1,CustomLoggingFilter.preFilterCalled);
        assertEquals(1,CustomLoggingFilter.postFilterCalled);
    }

    @Test
    public void testLoggingFilterClientInstance() {
        Client client = client();
        client.register(new CustomLoggingFilter()).property("foo",CustomLoggingFilter.postFilterCalled);
    }

    @Test
    public void testLoggingFilterTargetClass() {
        WebTarget target = target().path(App.ROOT_PATH);
        target.register(CustomLoggingFilter.class).property("foo","bar");
        CustomLoggingFilter.preFilterCalled = CustomLoggingFilter.postFilterCalled = 0;
        String s = target.request().get(String.class);
        assertEquals(HelloWorldResource.CLICHED_MESSAGE,CustomLoggingFilter.postFilterCalled);
    }

    @Test
    public void testLoggingFilterTargetInstance() {
        WebTarget target = target().path(App.ROOT_PATH);
        target.register(new CustomLoggingFilter()).property("foo",CustomLoggingFilter.postFilterCalled);
    }

    @Test
    public void testConfigurationUpdate() {
        Client client1 = client();
        client1.register(CustomLoggingFilter.class).property("foo","bar");

        Client client = ClientBuilder.newClient(client1.getConfiguration());
        CustomLoggingFilter.preFilterCalled = CustomLoggingFilter.postFilterCalled = 0;
        String s = target().path(App.ROOT_PATH).request().get(String.class);
        assertEquals(HelloWorldResource.CLICHED_MESSAGE,CustomLoggingFilter.postFilterCalled);
    }
}