Apache CXF example source code file (JAXRSMultithreadedClientTest.java)

This example Apache CXF source code file (JAXRSMultithreadedClientTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Apache CXF tags/keywords

bookstore, countdownlatch, countdownlatch, customheader, customvalue, exception, exception, io, port, port, string, string, test, threading, threadpoolexecutor, threads, util, webclientworker

The Apache CXF JAXRSMultithreadedClientTest.java source code

/**
 * 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.cxf.systest.jaxrs;

import java.io.InputStream;
import java.util.Collections;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.Response;

import org.apache.cxf.helpers.IOUtils;
import org.apache.cxf.jaxrs.client.Client;
import org.apache.cxf.jaxrs.client.JAXRSClientFactory;
import org.apache.cxf.jaxrs.client.WebClient;
import org.apache.cxf.testutil.common.AbstractBusClientServerTestBase;

import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Ignore;
import org.junit.Test;

public class JAXRSMultithreadedClientTest extends AbstractBusClientServerTestBase {
    public static final String PORT = BookServer.PORT;

    @BeforeClass
    public static void startServers() throws Exception {
        assertTrue("server did not launch correctly",
                   launchServer(BookServer.class));
    }
    
    @Test
    public void testStatefulWebClientWithCopy() throws Exception {
        runWebClients(WebClient.create("http://localhost:" + PORT + "/bookstore"), 10, false, true);
    }
    
    @Test
    public void testStatefulWebClientThreadLocal() throws Exception {
        runWebClients(WebClient.create("http://localhost:" + PORT + "/bookstore", true), 10, true, true);
    }
    
    @Test
    public void testStatefulWebClientThreadLocalWithCopy() throws Exception {
        runWebClients(WebClient.create("http://localhost:" + PORT + "/bookstore", true), 10, false, true);
    }
    
    @Test
    public void testSimpleWebClient() throws Exception {
        WebClient client = WebClient.create("http://localhost:" + PORT + "/bookstore/booksecho");
        client.type("text/plain").accept("text/plain").header("CustomHeader", "CustomValue");
        runWebClients(client, 10, true, false);
    }
    
    @Test
    public void testSimpleProxy() throws Exception {
        BookStore proxy = JAXRSClientFactory.create("http://localhost:" + PORT, BookStore.class);
        runProxies(proxy, 10, true, false);
    }
    
    @Test
    public void testThreadSafeProxy() throws Exception {
        BookStore proxy = JAXRSClientFactory.create("http://localhost:" + PORT, BookStore.class,
                                                    Collections.emptyList(), true);
        runProxies(proxy, 10, true, true);
    }
    
    @Test
    public void testThreadSafeProxyWithCopy() throws Exception {
        BookStore proxy = JAXRSClientFactory.create("http://localhost:" + PORT, BookStore.class,
                                                    Collections.emptyList(), true);
        runProxies(proxy, 10, false, true);
    }
    
    @Test
    public void testThreadSafeSubProxy() throws Exception {
        BookStore proxy = JAXRSClientFactory.create("http://localhost:" + PORT, BookStore.class,
                                                    Collections.emptyList(), true);
        
        runProxies(proxy.echoThroughBookStoreSub(), 10, true, true);
    }
    
    private void runWebClients(WebClient client, int numberOfClients, 
        boolean threadSafe, boolean stateCanBeChanged) throws Exception {
        ThreadPoolExecutor executor = new ThreadPoolExecutor(5, 5, 0, TimeUnit.SECONDS,
                                                             new ArrayBlockingQueue<Runnable>(10));
        CountDownLatch startSignal = new CountDownLatch(1);
        CountDownLatch doneSignal = new CountDownLatch(numberOfClients);
        
        for (int i = 1; i <= numberOfClients; i++) {
            WebClient wc = !threadSafe ? WebClient.fromClient(client) : client;
            String bookName = stateCanBeChanged ? Integer.toString(i) : "TheBook";
            String bookHeader = stateCanBeChanged ? "value" + i : "CustomValue";
            
            executor.execute(new WebClientWorker(wc, bookName, bookHeader, 
                             startSignal, doneSignal, stateCanBeChanged));
        }
        startSignal.countDown();
        doneSignal.await(60, TimeUnit.SECONDS);
        executor.shutdownNow();
        assertEquals("Not all invocations have completed", 0, doneSignal.getCount());
    }
    
    private void runProxies(BookStore proxy, int numberOfClients, 
                            boolean threadSafe, boolean stateCanBeChanged) throws Exception {
        ThreadPoolExecutor executor = new ThreadPoolExecutor(5, 5, 0, TimeUnit.SECONDS,
                                                            new ArrayBlockingQueue<Runnable>(10));
        CountDownLatch startSignal = new CountDownLatch(1);
        CountDownLatch doneSignal = new CountDownLatch(numberOfClients);
       
        for (int i = 1; i <= numberOfClients; i++) {
            // here we do a double copy : from proxy to web client and back to proxy  
            BookStore bs = !threadSafe ? JAXRSClientFactory.fromClient(
                   WebClient.fromClient(WebClient.client(proxy)), BookStore.class) : proxy;
            String bookName = stateCanBeChanged ? Integer.toString(i) : "TheBook";
            String bookHeader = stateCanBeChanged ? "value" + i : "CustomValue";
           
            executor.execute(new RootProxyWorker(bs, bookName, bookHeader, 
                            startSignal, doneSignal, stateCanBeChanged));
        }
        startSignal.countDown();
        doneSignal.await(60, TimeUnit.SECONDS);
        executor.shutdownNow();
        assertEquals("Not all invocations have completed", 0, doneSignal.getCount());
    }
    
    @Ignore
    private class WebClientWorker implements Runnable {

        private WebClient client;
        private String bookName;
        private String bookHeader;
        private CountDownLatch startSignal;
        private CountDownLatch doneSignal;
        private boolean stateCanBeChanged;
        
        public WebClientWorker(WebClient client,
                               String bookName,
                               String bookHeader,
                               CountDownLatch startSignal,
                               CountDownLatch doneSignal,
                               boolean stateCanBeChanged) {
            this.client = client;
            this.bookName = bookName;
            this.bookHeader = bookHeader;
            this.startSignal = startSignal;
            this.doneSignal = doneSignal;
            this.stateCanBeChanged = stateCanBeChanged;
        }
        
        public void run() {
            
            try {
                startSignal.await();
                
                for (int i = 0; i < 5; i++) {
                    if (stateCanBeChanged) {
                        invoke(i);
                    } else {
                        doInvoke(bookName, bookHeader);
                    }
                }
                
                doneSignal.countDown();
            } catch (InterruptedException ex) {
                // ignore
            } catch (Exception ex) {
                ex.printStackTrace();
                Assert.fail("WebClientWorker thread failed for " + bookName + "," + bookHeader);
            } 
            
        }
        
        private void invoke(int ind) throws Exception {
            client.type("text/plain").accept("text/plain");
            
            String actualHeaderName = bookHeader + ind;
            String actualBookName = bookName + ind;
            
            MultivaluedMap<String, String> map = client.getHeaders();
            map.putSingle("CustomHeader", actualHeaderName);
            client.headers(map).path("booksecho");
                        
            doInvoke(actualBookName, actualHeaderName);
            
            // reset current path
            client.back(true);
        }
        
        private void doInvoke(String actualBookName, String actualHeaderName) throws Exception {
            Response response = client.post(actualBookName);
            
            assertEquals(actualHeaderName, 
                response.getMetadata().getFirst("CustomHeader").toString());
            String responseValue = IOUtils.readStringFromStream((InputStream)response.getEntity());
            assertEquals(actualBookName, responseValue);
        }
    }
    
    @Ignore
    private class RootProxyWorker implements Runnable {

        private BookStore proxy;
        private String bookName;
        private String bookHeader;
        private CountDownLatch startSignal;
        private CountDownLatch doneSignal;
        private boolean stateCanBeChanged;
        
        public RootProxyWorker(BookStore proxy,
                               String bookName,
                               String bookHeader,
                               CountDownLatch startSignal,
                               CountDownLatch doneSignal,
                               boolean stateCanBeChanged) {
            this.proxy = proxy;
            this.bookName = bookName;
            this.bookHeader = bookHeader;
            this.startSignal = startSignal;
            this.doneSignal = doneSignal;
            this.stateCanBeChanged = stateCanBeChanged;
        }
        
        public void run() {
            
            try {
                startSignal.await();
                
                for (int i = 0; i < 5; i++) {
                    invoke(i);
                }
                
                doneSignal.countDown();
            } catch (InterruptedException ex) {
                // ignore
            } catch (Exception ex) {
                ex.printStackTrace();
                Assert.fail("WebClientWorker thread failed for " + bookName + "," + bookHeader);
            } 
            
        }
        
        private void invoke(int ind) throws Exception {
            
            String actualHeaderName = bookHeader + ind;
            String actualBookName = bookName + ind;
            
            if (stateCanBeChanged) {
                Client c = WebClient.client(proxy);
                MultivaluedMap<String, String> map = c.getHeaders();
                map.putSingle("CustomHeader", actualHeaderName);
                c.headers(map);
                proxy.echoBookNameAndHeader2(actualBookName);
                verifyResponse(c.getResponse(), actualBookName, actualHeaderName);
            } else {
                verifyResponse(proxy.echoBookNameAndHeader(actualHeaderName, actualBookName),
                               actualBookName, actualHeaderName);
            }
        }
        
        private void verifyResponse(Response response, String actualBookName, String actualHeaderName) 
            throws Exception { 
            assertEquals(actualHeaderName, 
                         response.getMetadata().getFirst("CustomHeader").toString());
            String responseValue = IOUtils.readStringFromStream((InputStream)response.getEntity());
            assertEquals(actualBookName, responseValue);
        }
    }
}