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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.vespa.config.proxy;
import com.yahoo.config.subscription.ConfigSourceSet;
import com.yahoo.config.subscription.impl.JRTConfigRequester;
import com.yahoo.slime.Slime;
import com.yahoo.vespa.config.*;
import com.yahoo.vespa.config.protocol.*;
import com.yahoo.vespa.config.util.ConfigUtils;
import org.junit.*;
import org.junit.rules.TemporaryFolder;
import java.time.Duration;
import java.time.Instant;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Optional;
import static junit.framework.TestCase.assertNotNull;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertThat;
/**
* @author hmusum
*/
public class UpstreamConfigSubscriberTest {
private final ConfigSourceSet sourceSet = new ConfigSourceSet("tcp/foo:78");
private final TimingValues timingValues = ProxyServer.defaultTimingValues();
private MapBackedConfigSource sourceResponses;
private MockClientUpdater clientUpdater;
private MockConnection mockConnection;
private long generation = 1;
@Rule
public TemporaryFolder temporaryFolder = new TemporaryFolder();
@Before
public void setup() {
clientUpdater = MockClientUpdater.create(new MemoryCache());
sourceResponses = new MapBackedConfigSource(clientUpdater);
mockConnection = new MockConnection(sourceResponses);
}
@Test
public void basic() {
RawConfig fooConfig = Helper.fooConfig;
sourceResponses.put(fooConfig.getKey(), fooConfig);
UpstreamConfigSubscriber subscriber = createUpstreamConfigSubscriber(fooConfig);
waitForConfigGeneration(clientUpdater, fooConfig.getKey(), generation);
assertThat(clientUpdater.getLastConfig(), is(fooConfig));
subscriber.cancel();
}
@Test
public void require_that_reconfiguration_works() {
RawConfig fooConfig = Helper.fooConfig;
sourceResponses.put(fooConfig.getKey(), fooConfig);
UpstreamConfigSubscriber subscriber = createUpstreamConfigSubscriber(fooConfig);
waitForConfigGeneration(clientUpdater, fooConfig.getKey(), generation);
assertThat(clientUpdater.getLastConfig(), is(fooConfig));
// Update payload in config
generation++;
final ConfigPayload payload = Helper.createConfigPayload("bar", "value2");
RawConfig fooConfig2 = createRawConfig(fooConfig, payload);
sourceResponses.put(fooConfig2.getKey(), fooConfig2);
waitForConfigGeneration(clientUpdater, fooConfig2.getKey(), generation);
assertFalse(clientUpdater.getLastConfig().equals(fooConfig));
subscriber.cancel();
}
@Test
public void require_that_error_response_is_handled() {
// Create config with error based on fooConfig
RawConfig fooConfig = Helper.fooConfig;
ConfigPayload errorConfigPayload = new ConfigPayload(new Slime());
Payload errorPayload = Payload.from(errorConfigPayload);
RawConfig errorConfig = new RawConfig(fooConfig.getKey(), fooConfig.getDefMd5(), errorPayload,
ConfigUtils.getMd5(errorConfigPayload), generation,
ErrorCode.UNKNOWN_DEFINITION, fooConfig.getDefContent(), Optional.empty());
sourceResponses.put(fooConfig.getKey(), errorConfig);
UpstreamConfigSubscriber subscriber = createUpstreamConfigSubscriber(errorConfig);
waitForConfigGeneration(clientUpdater, fooConfig.getKey(), generation);
RawConfig lastConfig = clientUpdater.getLastConfig();
assertEquals(errorConfig, lastConfig);
assertThat(lastConfig.errorCode(), is(ErrorCode.UNKNOWN_DEFINITION));
subscriber.cancel();
}
private Map<ConfigSourceSet, JRTConfigRequester> createRequesterPool() {
JRTConfigRequester request = JRTConfigRequester.get(mockConnection, timingValues);
Map<ConfigSourceSet, JRTConfigRequester> requesterPool = new LinkedHashMap<>();
requesterPool.put(sourceSet, request);
return requesterPool;
}
private void waitForConfigGeneration(MockClientUpdater clientUpdater, ConfigKey<?> configKey, long expectedGeneration) {
Instant end = Instant.now().plus(Duration.ofSeconds(60));
RawConfig lastConfig;
do {
lastConfig = clientUpdater.getLastConfig();
System.out.println("config=" + lastConfig + (lastConfig == null ? "" : ",generation=" + lastConfig.getGeneration()));
if (lastConfig != null && lastConfig.getKey().equals(configKey) &&
lastConfig.getGeneration() == expectedGeneration) {
break;
} else {
try {
Thread.sleep(10);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
} while (Instant.now().isBefore(end));
assertNotNull(lastConfig);
assertThat(lastConfig.getKey(), is(configKey));
assertThat(lastConfig.getGeneration(), is(expectedGeneration));
}
static class MockClientUpdater extends ClientUpdater {
private RawConfig lastConfig;
private MockClientUpdater(ConfigProxyStatistics statistics, Mode mode, MemoryCache memoryCache) {
super(memoryCache, new MockRpcServer(), statistics, new DelayedResponses(statistics), mode);
}
static MockClientUpdater create(MemoryCache memoryCache) {
Mode mode = new Mode();
ConfigProxyStatistics statistics = new ConfigProxyStatistics();
return new MockClientUpdater(statistics, mode, memoryCache);
}
@Override
public void updateSubscribers(RawConfig newConfig) {
lastConfig = newConfig;
}
RawConfig getLastConfig() {
return lastConfig;
}
}
private UpstreamConfigSubscriber createUpstreamConfigSubscriber(RawConfig config) {
UpstreamConfigSubscriber subscriber = new UpstreamConfigSubscriber(config, clientUpdater, sourceSet, timingValues, createRequesterPool());
subscriber.subscribe();
new Thread(subscriber).start();
return subscriber;
}
// Create new config based on another one
private RawConfig createRawConfig(RawConfig config, ConfigPayload configPayload) {
final int errorCode = 0;
Payload fooPayload = Payload.from(configPayload);
return new RawConfig(config.getKey(), config.getDefMd5(), fooPayload,
ConfigUtils.getMd5(configPayload), generation, errorCode,
config.getDefContent(), Optional.empty());
}
}
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