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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.handler;
import com.google.inject.Key;
import com.yahoo.container.core.VipStatusConfig;
import com.yahoo.jdisc.Container;
import com.yahoo.jdisc.Metric;
import com.yahoo.jdisc.References;
import com.yahoo.jdisc.ResourceReference;
import com.yahoo.jdisc.handler.BufferedContentChannel;
import com.yahoo.jdisc.handler.ContentChannel;
import com.yahoo.jdisc.handler.ReadableContentChannel;
import com.yahoo.jdisc.handler.RequestHandler;
import com.yahoo.jdisc.handler.ResponseHandler;
import com.yahoo.jdisc.http.HttpRequest;
import com.yahoo.jdisc.service.CurrentContainer;
import com.yahoo.text.Utf8;
import org.junit.Test;
import org.mockito.Mockito;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.ByteBuffer;
import java.util.concurrent.Executors;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
/**
* Check semantics of VIP status handler. Do note this handler does not need to
* care about the incoming URI, that's 100% handled in JDIsc by the binding
* pattern.
*
* @author <a href="mailto:steinar@yahoo-inc.com">Steinar Knutsen</a>
*/
public class VipStatusHandlerTestCase {
public static final class MockResponseHandler implements ResponseHandler {
final ReadableContentChannel channel = new ReadableContentChannel();
@Override
public ContentChannel handleResponse(
final com.yahoo.jdisc.Response response) {
return channel;
}
}
Metric metric = Mockito.mock(Metric.class);
@Test
public final void testHandleRequest() {
final VipStatusConfig config = new VipStatusConfig(new VipStatusConfig.Builder().accessdisk(false)
.noSearchBackendsImpliesOutOfService(false));
final VipStatusHandler handler = new VipStatusHandler(Executors.newCachedThreadPool(), config, metric);
final MockResponseHandler responseHandler = new MockResponseHandler();
final HttpRequest request = createRequest();
final BufferedContentChannel requestContent = createChannel();
handler.handleRequest(request, requestContent, responseHandler);
final ByteBuffer b = responseHandler.channel.read();
final byte[] asBytes = new byte[b.remaining()];
b.get(asBytes);
assertEquals(VipStatusHandler.OK_MESSAGE, Utf8.toString(asBytes));
}
public static final class NotFoundResponseHandler implements
ResponseHandler {
final ReadableContentChannel channel = new ReadableContentChannel();
@Override
public ContentChannel handleResponse(
final com.yahoo.jdisc.Response response) {
assertEquals(com.yahoo.jdisc.Response.Status.NOT_FOUND,
response.getStatus());
return channel;
}
}
@Test
public final void testFileNotFound() {
final VipStatusConfig config = new VipStatusConfig(new VipStatusConfig.Builder().accessdisk(true)
.statusfile("/VipStatusHandlerTestCaseFileThatReallyReallyShouldNotExist")
.noSearchBackendsImpliesOutOfService(false));
final VipStatusHandler handler = new VipStatusHandler(Executors.newCachedThreadPool(), config, metric);
final NotFoundResponseHandler responseHandler = new NotFoundResponseHandler();
final HttpRequest request = createRequest();
final BufferedContentChannel requestContent = createChannel();
handler.handleRequest(request, requestContent, responseHandler);
final ByteBuffer b = responseHandler.channel.read();
final byte[] asBytes = new byte[b.remaining()];
b.get(asBytes);
assertEquals(
VipStatusHandler.StatusResponse.COULD_NOT_FIND_STATUS_FILE,
Utf8.toString(asBytes));
}
@Test
public final void testFileFound() throws IOException {
final File statusFile = File.createTempFile("VipStatusHandlerTestCase",
null);
try {
final FileWriter writer = new FileWriter(statusFile);
final String OK = "OK\n";
writer.write(OK);
writer.close();
final VipStatusConfig config = new VipStatusConfig(new VipStatusConfig.Builder().accessdisk(true)
.statusfile(statusFile.getAbsolutePath()).noSearchBackendsImpliesOutOfService(false));
final VipStatusHandler handler = new VipStatusHandler(Executors.newCachedThreadPool(), config, metric);
final MockResponseHandler responseHandler = new MockResponseHandler();
final HttpRequest request = createRequest();
final BufferedContentChannel requestContent = createChannel();
handler.handleRequest(request, requestContent, responseHandler);
final ByteBuffer b = responseHandler.channel.read();
final byte[] asBytes = new byte[b.remaining()];
b.get(asBytes);
assertEquals(OK, Utf8.toString(asBytes));
} finally {
statusFile.delete();
}
}
@Test
public final void testProgrammaticallyRemovedFromRotation() throws IOException {
VipStatus vipStatus = new VipStatus();
final VipStatusConfig config = new VipStatusConfig(new VipStatusConfig.Builder().accessdisk(false)
.noSearchBackendsImpliesOutOfService(true));
final VipStatusHandler handler = new VipStatusHandler(Executors.newCachedThreadPool(), config, metric, vipStatus);
vipStatus.removeFromRotation(this);
{
final MockResponseHandler responseHandler = new MockResponseHandler();
final HttpRequest request = createRequest();
final BufferedContentChannel requestContent = createChannel();
handler.handleRequest(request, requestContent, responseHandler);
final ByteBuffer b = responseHandler.channel.read();
final byte[] asBytes = new byte[b.remaining()];
b.get(asBytes);
assertEquals(VipStatusHandler.StatusResponse.NO_SEARCH_BACKENDS, Utf8.toString(asBytes));
}
vipStatus.addToRotation(this);
{
final MockResponseHandler responseHandler = new MockResponseHandler();
final HttpRequest request = createRequest();
final BufferedContentChannel requestContent = createChannel();
handler.handleRequest(request, requestContent, responseHandler);
final ByteBuffer b = responseHandler.channel.read();
final byte[] asBytes = new byte[b.remaining()];
b.get(asBytes);
assertEquals(VipStatusHandler.OK_MESSAGE, Utf8.toString(asBytes));
}
}
public static HttpRequest createRequest() {
return createRequest("http://localhost/search/?query=geewhiz");
}
public static HttpRequest createRequest(String uri) {
HttpRequest request = null;
try {
request = HttpRequest.newClientRequest(new com.yahoo.jdisc.Request(
new MockCurrentContainer(), new URI(uri)), new URI(uri),
HttpRequest.Method.GET, HttpRequest.Version.HTTP_1_1);
request.setRemoteAddress(new InetSocketAddress(0));
} catch (URISyntaxException e) {
fail("Illegal URI string in test?");
}
return request;
}
public static BufferedContentChannel createChannel() {
BufferedContentChannel channel = new BufferedContentChannel();
channel.close(null);
return channel;
}
private static class MockCurrentContainer implements CurrentContainer {
@Override
public Container newReference(java.net.URI uri) {
return new Container() {
@Override
public RequestHandler resolveHandler(com.yahoo.jdisc.Request request) {
return null;
}
@Override
public <T> T getInstance(Key<T> tKey) {
return null;
}
@Override
public <T> T getInstance(Class<T> tClass) {
return null;
}
@Override
public ResourceReference refer() {
return References.NOOP_REFERENCE;
}
@Override
public void release() {
// NOP
}
@Override
public long currentTimeMillis() {
return 0;
}
};
}
}
}
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