Package org.apache.http.nio.integration

Source Code of org.apache.http.nio.integration.DelayedRequestHandler

/*
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* 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation.  For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
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*/

package org.apache.http.nio.integration;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.Future;

import org.apache.http.HttpEntityEnclosingRequest;
import org.apache.http.HttpException;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.HttpVersion;
import org.apache.http.entity.ContentType;
import org.apache.http.message.BasicHttpEntityEnclosingRequest;
import org.apache.http.message.BasicHttpRequest;
import org.apache.http.message.BasicHttpResponse;
import org.apache.http.nio.entity.NStringEntity;
import org.apache.http.nio.protocol.BasicAsyncRequestConsumer;
import org.apache.http.nio.protocol.BasicAsyncRequestHandler;
import org.apache.http.nio.protocol.BasicAsyncResponseProducer;
import org.apache.http.nio.protocol.HttpAsyncExchange;
import org.apache.http.nio.protocol.HttpAsyncExpectationVerifier;
import org.apache.http.nio.protocol.HttpAsyncRequestConsumer;
import org.apache.http.nio.protocol.HttpAsyncRequestHandler;
import org.apache.http.nio.protocol.HttpAsyncRequestHandlerMapper;
import org.apache.http.nio.protocol.UriHttpAsyncRequestHandlerMapper;
import org.apache.http.nio.reactor.IOReactorStatus;
import org.apache.http.nio.reactor.ListenerEndpoint;
import org.apache.http.nio.testserver.HttpCoreNIOTestBase;
import org.apache.http.protocol.HttpContext;
import org.apache.http.protocol.HttpProcessor;
import org.apache.http.protocol.ImmutableHttpProcessor;
import org.apache.http.protocol.RequestConnControl;
import org.apache.http.protocol.RequestContent;
import org.apache.http.protocol.RequestTargetHost;
import org.apache.http.protocol.RequestUserAgent;
import org.apache.http.util.EntityUtils;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;

/**
* HttpCore NIO integration tests for pipelined request processing.
*/
@RunWith(Parameterized.class)
public class TestHttpAsyncHandlersPipelining extends HttpCoreNIOTestBase {

    @Parameterized.Parameters(name = "{0}")
    public static Collection<Object[]> protocols() {
        return Arrays.asList(new Object[][]{
                {ProtocolScheme.http},
                {ProtocolScheme.https},
        });
    }

    public TestHttpAsyncHandlersPipelining(final ProtocolScheme scheme) {
        super(scheme);
    }

    public static final HttpProcessor DEFAULT_HTTP_PROC = new ImmutableHttpProcessor(
            new RequestContent(),
            new RequestTargetHost(),
            new RequestConnControl(),
            new RequestUserAgent("TEST-CLIENT/1.1"));

    @Before
    public void setUp() throws Exception {
        initServer();
        initClient();
    }

    @After
    public void tearDown() throws Exception {
        shutDownClient();
        shutDownServer();
    }

    private HttpHost start(
            final HttpProcessor clientProtocolProcessor,
            final HttpProcessor serverProtocolProcessor,
            final HttpAsyncRequestHandlerMapper requestHandlerResolver,
            final HttpAsyncExpectationVerifier expectationVerifier) throws Exception {
        this.server.start(serverProtocolProcessor, requestHandlerResolver, expectationVerifier);
        this.client.start(clientProtocolProcessor);

        final ListenerEndpoint endpoint = this.server.getListenerEndpoint();
        endpoint.waitFor();

        Assert.assertEquals("Test server status", IOReactorStatus.ACTIVE, this.server.getStatus());
        final InetSocketAddress address = (InetSocketAddress) endpoint.getAddress();
        return new HttpHost("localhost", address.getPort(), getScheme().name());
    }

    private HttpHost start(
            final HttpAsyncRequestHandlerMapper requestHandlerResolver,
            final HttpAsyncExpectationVerifier expectationVerifier) throws Exception {
        return start(DEFAULT_HTTP_PROC, null, requestHandlerResolver, expectationVerifier);
    }

    private static String createRequestUri(final String pattern, final int count) {
        return pattern + "x" + count;
    }

    private static String createExpectedString(final String pattern, final int count) {
        final StringBuilder buffer = new StringBuilder();
        for (int i = 0; i < count; i++) {
            buffer.append(pattern);
        }
        return buffer.toString();
    }

    @Test
    public void testHttpGets() throws Exception {
        final UriHttpAsyncRequestHandlerMapper registry = new UriHttpAsyncRequestHandlerMapper();
        registry.register("*", new BasicAsyncRequestHandler(new SimpleRequestHandler()));
        final HttpHost target = start(registry, null);

        this.client.setMaxPerRoute(3);
        this.client.setMaxTotal(3);

        final String pattern = RndTestPatternGenerator.generateText();
        final int count = RndTestPatternGenerator.generateCount(1000);

        final String expectedPattern = createExpectedString(pattern, count);

        final Queue<Future<List<HttpResponse>>> queue = new ConcurrentLinkedQueue<Future<List<HttpResponse>>>();
        for (int i = 0; i < 10; i++) {
            final String requestUri = createRequestUri(pattern, count);
            final Future<List<HttpResponse>> future = this.client.executePipelined(target,
                    new BasicHttpRequest("GET", requestUri),
                    new BasicHttpRequest("GET", requestUri),
                    new BasicHttpRequest("GET", requestUri));
            queue.add(future);
        }

        while (!queue.isEmpty()) {
            final Future<List<HttpResponse>> future = queue.remove();
            final List<HttpResponse> responses = future.get();
            Assert.assertNotNull(responses);
            Assert.assertEquals(3, responses.size());
            for (HttpResponse response: responses) {
                Assert.assertEquals(HttpStatus.SC_OK, response.getStatusLine().getStatusCode());
                Assert.assertEquals(expectedPattern, EntityUtils.toString(response.getEntity()));
            }
        }
    }

    @Test
    public void testHttpHeads() throws Exception {
        final UriHttpAsyncRequestHandlerMapper registry = new UriHttpAsyncRequestHandlerMapper();
        registry.register("*", new BasicAsyncRequestHandler(new SimpleRequestHandler()));
        final HttpHost target = start(registry, null);

        this.client.setMaxPerRoute(3);
        this.client.setMaxTotal(3);

        final String pattern = RndTestPatternGenerator.generateText();
        final int count = RndTestPatternGenerator.generateCount(1000);

        final Queue<Future<List<HttpResponse>>> queue = new ConcurrentLinkedQueue<Future<List<HttpResponse>>>();
        for (int i = 0; i < 10; i++) {
            final String requestUri = createRequestUri(pattern, count);
            final Future<List<HttpResponse>> future = this.client.executePipelined(target,
                    new BasicHttpRequest("GET", requestUri),
                    new BasicHttpRequest("GET", requestUri),
                    new BasicHttpRequest("GET", requestUri));
            queue.add(future);
        }

        while (!queue.isEmpty()) {
            final Future<List<HttpResponse>> future = queue.remove();
            final List<HttpResponse> responses = future.get();
            Assert.assertNotNull(responses);
            Assert.assertEquals(3, responses.size());
            for (HttpResponse response: responses) {
                Assert.assertEquals(HttpStatus.SC_OK, response.getStatusLine().getStatusCode());
            }
        }
    }

    @Test
    public void testHttpPosts() throws Exception {
        final UriHttpAsyncRequestHandlerMapper registry = new UriHttpAsyncRequestHandlerMapper();
        registry.register("*", new BasicAsyncRequestHandler(new SimpleRequestHandler()));
        final HttpHost target = start(registry, null);

        this.client.setMaxPerRoute(3);
        this.client.setMaxTotal(3);

        final String pattern = RndTestPatternGenerator.generateText();
        final int count = RndTestPatternGenerator.generateCount(1000);

        final String expectedPattern = createExpectedString(pattern, count);

        final Queue<Future<List<HttpResponse>>> queue = new ConcurrentLinkedQueue<Future<List<HttpResponse>>>();
        for (int i = 0; i < 10; i++) {
            final String requestUri = createRequestUri(pattern, count);
            final HttpEntityEnclosingRequest request1 = new BasicHttpEntityEnclosingRequest("POST", requestUri);
            final NStringEntity entity1 = new NStringEntity(expectedPattern, ContentType.DEFAULT_TEXT);
            entity1.setChunked(RndTestPatternGenerator.generateBoolean());
            request1.setEntity(entity1);
            final HttpEntityEnclosingRequest request2 = new BasicHttpEntityEnclosingRequest("POST", requestUri);
            final NStringEntity entity2 = new NStringEntity(expectedPattern, ContentType.DEFAULT_TEXT);
            entity2.setChunked(RndTestPatternGenerator.generateBoolean());
            request2.setEntity(entity2);
            final HttpEntityEnclosingRequest request3 = new BasicHttpEntityEnclosingRequest("POST", requestUri);
            final NStringEntity entity3 = new NStringEntity(expectedPattern, ContentType.DEFAULT_TEXT);
            entity3.setChunked(RndTestPatternGenerator.generateBoolean());
            request3.setEntity(entity3);
            final Future<List<HttpResponse>> future = this.client.executePipelined(target,
                    request1, request2, request3);
            queue.add(future);
        }

        while (!queue.isEmpty()) {
            final Future<List<HttpResponse>> future = queue.remove();
            final List<HttpResponse> responses = future.get();
            Assert.assertNotNull(responses);
            Assert.assertEquals(3, responses.size());
            for (HttpResponse response: responses) {
                Assert.assertEquals(HttpStatus.SC_OK, response.getStatusLine().getStatusCode());
                Assert.assertEquals(expectedPattern, EntityUtils.toString(response.getEntity()));
            }
        }
    }

    @Test
    public void testHttpDelayedResponse() throws Exception {

        class DelayedRequestHandler implements HttpAsyncRequestHandler<HttpRequest> {

            private final SimpleRequestHandler requestHandler;

            public DelayedRequestHandler() {
                super();
                this.requestHandler = new SimpleRequestHandler();
            }

            @Override
            public HttpAsyncRequestConsumer<HttpRequest> processRequest(
                    final HttpRequest request,
                    final HttpContext context) {
                return new BasicAsyncRequestConsumer();
            }

            @Override
            public void handle(
                    final HttpRequest request,
                    final HttpAsyncExchange httpexchange,
                    final HttpContext context) throws HttpException, IOException {
                final BasicHttpResponse response = new BasicHttpResponse(HttpVersion.HTTP_1_1, HttpStatus.SC_OK, "OK");
                new Thread() {
                    @Override
                    public void run() {
                        // Wait a bit, to make sure this is delayed.
                        try { Thread.sleep(100); } catch(final InterruptedException ie) {}
                        // Set the entity after delaying...
                        try {
                            requestHandler.handle(request, response, context);
                        } catch (final Exception ex) {
                            response.setStatusCode(HttpStatus.SC_INTERNAL_SERVER_ERROR);
                        }
                        httpexchange.submitResponse(new BasicAsyncResponseProducer(response));
                    }
                }.start();
            }

        }

        final UriHttpAsyncRequestHandlerMapper registry = new UriHttpAsyncRequestHandlerMapper();
        registry.register("*", new DelayedRequestHandler());
        final HttpHost target = start(registry, null);

        this.client.setMaxPerRoute(3);
        this.client.setMaxTotal(3);

        final String pattern1 = RndTestPatternGenerator.generateText();
        final String pattern2 = RndTestPatternGenerator.generateText();
        final String pattern3 = RndTestPatternGenerator.generateText();
        final int count = RndTestPatternGenerator.generateCount(1000);

        final String expectedPattern1 = createExpectedString(pattern1, count);
        final String expectedPattern2 = createExpectedString(pattern2, count);
        final String expectedPattern3 = createExpectedString(pattern3, count);

        final Queue<Future<List<HttpResponse>>> queue = new ConcurrentLinkedQueue<Future<List<HttpResponse>>>();
        for (int i = 0; i < 1; i++) {
            final HttpRequest request1 = new BasicHttpRequest("GET", createRequestUri(pattern1, count));
            final HttpEntityEnclosingRequest request2 = new BasicHttpEntityEnclosingRequest("POST",
                    createRequestUri(pattern2, count));
            final NStringEntity entity2 = new NStringEntity(expectedPattern2, ContentType.DEFAULT_TEXT);
            entity2.setChunked(RndTestPatternGenerator.generateBoolean());
            request2.setEntity(entity2);
            final HttpEntityEnclosingRequest request3 = new BasicHttpEntityEnclosingRequest("POST",
                    createRequestUri(pattern3, count));
            final NStringEntity entity3 = new NStringEntity(expectedPattern3, ContentType.DEFAULT_TEXT);
            entity3.setChunked(RndTestPatternGenerator.generateBoolean());
            request3.setEntity(entity3);
            final Future<List<HttpResponse>> future = this.client.executePipelined(target,
                    request1, request2, request3);
            queue.add(future);
        }

        while (!queue.isEmpty()) {
            final Future<List<HttpResponse>> future = queue.remove();
            final List<HttpResponse> responses = future.get();
            Assert.assertNotNull(responses);
            Assert.assertEquals(3, responses.size());
            for (HttpResponse response: responses) {
                Assert.assertEquals(HttpStatus.SC_OK, response.getStatusLine().getStatusCode());
            }
            Assert.assertEquals(expectedPattern1, EntityUtils.toString(responses.get(0).getEntity()));
            Assert.assertEquals(expectedPattern2, EntityUtils.toString(responses.get(1).getEntity()));
            Assert.assertEquals(expectedPattern3, EntityUtils.toString(responses.get(2).getEntity()));
        }
    }

}
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