SocketProtocolListenerTest.java

/*
 * 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.nifi.cluster.protocol.impl;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketTimeoutException;
import org.apache.nifi.cluster.protocol.ProtocolContext;
import org.apache.nifi.cluster.protocol.ProtocolMessageMarshaller;
import org.apache.nifi.cluster.protocol.ProtocolMessageUnmarshaller;
import org.apache.nifi.cluster.protocol.jaxb.JaxbProtocolContext;
import org.apache.nifi.cluster.protocol.jaxb.message.JaxbProtocolUtils;
import org.apache.nifi.cluster.protocol.message.PingMessage;
import org.apache.nifi.cluster.protocol.message.ProtocolMessage;
import org.apache.nifi.cluster.protocol.impl.testutils.DelayedProtocolHandler;
import org.apache.nifi.cluster.protocol.impl.testutils.ReflexiveProtocolHandler;
import org.apache.nifi.io.socket.ServerSocketConfiguration;
import org.apache.nifi.io.socket.SocketConfiguration;
import org.apache.nifi.io.socket.SocketUtils;
import org.junit.After;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
import org.junit.Before;
import org.junit.Test;

/**
 */
public class SocketProtocolListenerTest {

    private SocketProtocolListener listener;

    private Socket socket;

    private ProtocolMessageMarshaller<ProtocolMessage> marshaller;

    private ProtocolMessageUnmarshaller<ProtocolMessage> unmarshaller;

    @Before
    public void setup() throws Exception {

        final ProtocolContext protocolContext = new JaxbProtocolContext(JaxbProtocolUtils.JAXB_CONTEXT);
        marshaller = protocolContext.createMarshaller();
        unmarshaller = protocolContext.createUnmarshaller();

        ServerSocketConfiguration configuration = new ServerSocketConfiguration();
        configuration.setSocketTimeout(1000);

        listener = new SocketProtocolListener(5, 0, configuration, protocolContext);
        listener.start();

        int port = listener.getPort();

        SocketConfiguration config = new SocketConfiguration();
        config.setReuseAddress(true);
        config.setSocketTimeout(1000);
        socket = SocketUtils.createSocket(new InetSocketAddress("localhost", port), config);
    }

    @After
    public void teardown() throws IOException {
        try {
            if (listener.isRunning()) {
                listener.stop();
            }
        } finally {
            SocketUtils.closeQuietly(socket);
        }
    }

    @Test
    public void testBadRequest() throws Exception {
        DelayedProtocolHandler handler = new DelayedProtocolHandler(0);
        listener.addHandler(handler);
        socket.getOutputStream().write(5);
        Thread.sleep(250);
        assertEquals(0, handler.getMessages().size());
    }

    @Test
    public void testRequest() throws Exception {
        ProtocolMessage msg = new PingMessage();

        ReflexiveProtocolHandler handler = new ReflexiveProtocolHandler();
        listener.addHandler(handler);

        // marshal message to output stream
        marshaller.marshal(msg, socket.getOutputStream());

        // unmarshall response and return
        ProtocolMessage response = unmarshaller.unmarshal(socket.getInputStream());
        assertEquals(msg.getType(), response.getType());

        assertEquals(1, handler.getMessages().size());
        assertEquals(msg.getType(), handler.getMessages().get(0).getType());
    }

    @Test
    public void testDelayedRequest() throws Exception {
        ProtocolMessage msg = new PingMessage();

        DelayedProtocolHandler handler = new DelayedProtocolHandler(2000);
        listener.addHandler(handler);

        // marshal message to output stream
        marshaller.marshal(msg, socket.getOutputStream());

        try {
            socket.getInputStream().read();
            fail("Socket timeout not received.");
        } catch (SocketTimeoutException ste) {
        }

        assertEquals(1, handler.getMessages().size());
        assertEquals(msg.getType(), handler.getMessages().get(0).getType());
    }

}