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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.fs4.mplex;
import com.yahoo.container.QrConfig;
import com.yahoo.container.search.Fs4Config;
import com.yahoo.fs4.BasicPacket;
import com.yahoo.fs4.ChannelTimeoutException;
import com.yahoo.fs4.PingPacket;
import com.yahoo.fs4.QueryPacket;
import com.yahoo.fs4.mplex.Backend.BackendStatistics;
import com.yahoo.prelude.fastsearch.FS4ResourcePool;
import com.yahoo.search.Query;
import org.junit.Test;
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.nio.ByteBuffer;
import java.util.logging.Logger;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
/**
* Test networking code for talking to dispatch.
*
* @author Steinar Knutsen
*/
public class BackendTestCase {
private static final long TIMEOUT = 30000;
public static class MockDispatch implements Runnable {
public final ServerSocket socket;
public volatile Socket connection;
volatile int channelId;
public byte[] packetData = new byte[] {0,0,0,104,
0,0,0,217-256,
0,0,0,1,
0,0,0,0,
0,0,0,2,
0,0,0,0,0,0,0,5,
0x40,0x39,0,0,0,0,0,0,
0,0,0,111,
0,0,0,97,
0,0,0,3, 1,1,1,1,1,1,1,1,1,1,1,1, 0x40,0x37,0,0,0,0,0,23, 0,0,0,7, 0,0,0,36,
0,0,0,4, 2,2,2,2,2,2,2,2,2,2,2,2, 0x40,0x35,0,0,0,0,0,21, 0,0,0,8, 0,0,0,37};
MockDispatch(ServerSocket socket) {
this.socket = socket;
}
@Override
public void run() {
try {
connection = socket.accept();
} catch (IOException e) {
e.printStackTrace();
return;
}
requestRespond();
}
void requestRespond() {
byte[] length = new byte[4];
try {
connection.getInputStream().read(length);
} catch (IOException e) {
e.printStackTrace();
return;
}
int actual = ByteBuffer.wrap(length).getInt();
int read = 0;
int i = 0;
while (read != -1 && i < actual) {
try {
read = connection.getInputStream().read();
++i;
} catch (IOException e) {
e.printStackTrace();
return;
}
}
ByteBuffer reply = ByteBuffer.wrap(packetData);
if (channelId != -1) {
reply.putInt(8, channelId);
}
try {
connection.getOutputStream().write(packetData);
} catch (IOException e) {
e.printStackTrace();
}
}
public void setNoChannel() {
channelId = -1;
}
}
public static class MockServer {
public InetSocketAddress host;
public Thread worker;
public MockDispatch dispatch;
public MockServer() throws IOException {
ServerSocket socket = new ServerSocket(0, 50, InetAddress.getLoopbackAddress());
host = (InetSocketAddress) socket.getLocalSocketAddress();
dispatch = new MockDispatch(socket);
worker = new Thread(dispatch);
worker.start();
}
}
private Backend backend;
private MockServer server;
private Logger logger;
private boolean initUseParent;
private FS4ResourcePool listeners;
public static final byte[] PONG = new byte[] { 0, 0, 0, 32, 0, 0, 0, 221 - 256,
0,0,0,1, 0, 0, 0, 42, 0, 0, 0, 127, 0, 0, 0, 2, 0, 0, 0, 2, 0, 0, 0, 1, 0,
0, 0, 1 };
public void setUp() throws Exception {
logger = Logger.getLogger(Backend.class.getName());
initUseParent = logger.getUseParentHandlers();
logger.setUseParentHandlers(false);
listeners = new FS4ResourcePool(new Fs4Config(new Fs4Config.Builder()), new QrConfig(new QrConfig.Builder()));
server = new MockServer();
backend = listeners.getBackend(server.host.getHostString(), server.host.getPort());
}
public void tearDown() throws Exception {
listeners.deconstruct();
server.dispatch.socket.close();
if (server.dispatch.connection !=null) server.dispatch.connection.close();
if (server.worker!=null) server.worker.join();
if (logger !=null) logger.setUseParentHandlers(initUseParent);
}
private BasicPacket [] read(FS4Channel channel) throws InvalidChannelException {
try {
return channel.receivePackets(TIMEOUT, 1);
} catch (ChannelTimeoutException e) {
fail("Could not get packets from simulated backend.");
}
return new BasicPacket[1];
}
@Test
public void testAll() throws Exception {
setUp();
doTestBackend();
tearDown();
setUp();
doTestPinging();
tearDown();
setUp();
doRequireStatistics();
tearDown();
}
private void doTestBackend() throws IOException, InvalidChannelException {
FS4Channel channel = backend.openChannel();
Query q = new Query("/?query=a");
int channelId = channel.getChannelId();
server.dispatch.channelId = channelId;
assertTrue(backend.sendPacket(QueryPacket.create("container.0", q), channelId));
BasicPacket[] b = read(channel);
assertEquals(1, b.length);
assertEquals(217, b[0].getCode());
channel.close();
}
private void doTestPinging() throws IOException, InvalidChannelException {
FS4Channel channel = backend.openPingChannel();
server.dispatch.setNoChannel();
server.dispatch.packetData = PONG;
assertTrue(channel.sendPacket(new PingPacket()));
BasicPacket[] b = read(channel);
assertEquals(1, b.length);
assertEquals(221, b[0].getCode());
channel.close();
}
private void doRequireStatistics() throws IOException, InvalidChannelException {
FS4Channel channel = backend.openPingChannel();
server.dispatch.channelId = -1;
server.dispatch.packetData = PONG;
assertTrue(channel.sendPacket(new PingPacket()));
read(channel);
BackendStatistics stats = backend.getStatistics();
assertEquals(1, stats.totalConnections());
}
}
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