com.datatorrent.lib.io.HttpJsonChunksInputOperatorTest.java Source code

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Here is the source code for com.datatorrent.lib.io.HttpJsonChunksInputOperatorTest.java

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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.
 */
package com.datatorrent.lib.io;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.codehaus.jettison.json.JSONException;
import org.codehaus.jettison.json.JSONObject;
import org.eclipse.jetty.server.Handler;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.handler.AbstractHandler;
import org.junit.Assert;
import org.junit.Test;

import org.apache.commons.io.IOUtils;

import com.datatorrent.lib.testbench.CollectorTestSink;

/**
 * Functional test for {@linkcom.datatorrent.lib.io.HttpJsonChunksInputOperator }.
 */
public class HttpJsonChunksInputOperatorTest {
    @SuppressWarnings({ "rawtypes", "unchecked" })
    @Test
    public void testHttpInputModule() throws Exception {

        final List<String> receivedMessages = new ArrayList<String>();
        Handler handler = new AbstractHandler() {
            int responseCount = 0;

            @Override
            public void handle(String string, Request rq, HttpServletRequest request, HttpServletResponse response)
                    throws IOException, ServletException {
                ByteArrayOutputStream bos = new ByteArrayOutputStream();
                IOUtils.copy(request.getInputStream(), bos);
                receivedMessages.add(new String(bos.toByteArray()));
                response.setContentType("application/json");
                response.setStatus(HttpServletResponse.SC_OK);
                response.setHeader("Transfer-Encoding", "chunked");
                try {
                    JSONObject json = new JSONObject();
                    json.put("responseId", "response" + ++responseCount);
                    byte[] bytes = json.toString().getBytes();
                    response.getOutputStream().println(bytes.length);
                    response.getOutputStream().write(bytes);
                    response.getOutputStream().println();
                    response.getOutputStream().println(0);
                    response.getOutputStream().flush();
                } catch (JSONException e) {
                    response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
                            "Error generating response: " + e.toString());
                }

                ((Request) request).setHandled(true);
            }
        };

        Server server = new Server(0);
        server.setHandler(handler);
        server.start();

        String url = "http://localhost:" + server.getConnectors()[0].getLocalPort() + "/somecontext";
        final AbstractHttpInputOperator operator = new HttpJsonChunksInputOperator();

        CollectorTestSink sink = new CollectorTestSink();

        operator.outputPort.setSink(sink);
        operator.setUrl(new URI(url));

        operator.setup(null);
        operator.activate(null);

        int timeoutMillis = 3000;
        while (sink.collectedTuples.isEmpty() && timeoutMillis > 0) {
            operator.emitTuples();
            timeoutMillis -= 20;
            Thread.sleep(20);
        }

        Assert.assertTrue("tuple emitted", sink.collectedTuples.size() > 0);

        Map<String, String> tuple = (Map<String, String>) sink.collectedTuples.get(0);
        Assert.assertEquals("", tuple.get("responseId"), "response1");

        operator.deactivate();
        operator.teardown();
        server.stop();

    }
}