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// Copyright Yahoo. 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.vespa.config.ConfigCacheKey;
import com.yahoo.vespa.config.ConfigKey;
import com.yahoo.vespa.config.ErrorCode;
import com.yahoo.vespa.config.RawConfig;
import com.yahoo.vespa.config.protocol.JRTServerConfigRequest;
import com.yahoo.vespa.config.protocol.Payload;
import org.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import java.util.Optional;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
/**
* @author hmusum
*/
public class ProxyServerTest {
private final MockConfigSource source = new MockConfigSource();
private final ConfigSourceClient client = new MockConfigSourceClient(source);
private ProxyServer proxy;
static final RawConfig fooConfig = ConfigTester.fooConfig;
// errorConfig based on fooConfig
private static final ConfigKey<?> errorConfigKey = new ConfigKey<>("error", fooConfig.getConfigId(), fooConfig.getNamespace());
static final RawConfig errorConfig = new RawConfig(errorConfigKey, fooConfig.getDefMd5(), fooConfig.getPayload(),
fooConfig.getPayloadChecksums(), fooConfig.getGeneration(), false,
ErrorCode.UNKNOWN_DEFINITION, fooConfig.getDefContent(), Optional.empty());
@Rule
public TemporaryFolder temporaryFolder = new TemporaryFolder();
@Before
public void setup() {
source.clear();
source.put(fooConfig.getKey(), createConfigWithNextConfigGeneration(fooConfig, 0));
source.put(errorConfigKey, createConfigWithNextConfigGeneration(fooConfig, ErrorCode.UNKNOWN_DEFINITION));
proxy = createTestServer(source, client);
}
@After
public void shutdown() {
proxy.stop();
}
@Test
public void basic() {
assertTrue(proxy.getMode().isDefault());
assertEquals(0, proxy.memoryCache().size());
ConfigTester tester = new ConfigTester();
MemoryCache memoryCache = proxy.memoryCache();
assertEquals(0, memoryCache.size());
RawConfig res = proxy.resolveConfig(tester.createRequest(fooConfig)).orElseThrow();
assertEquals(ConfigTester.fooPayload.toString(), res.getPayload().toString());
assertEquals(1, memoryCache.size());
assertEquals(res, memoryCache.get(new ConfigCacheKey(fooConfig.getKey(), fooConfig.getDefMd5())).orElseThrow());
}
/**
* Tests that the proxy server RPC commands for setting and getting mode works..
*/
@Test
public void testModeSwitch() {
ProxyServer proxy = createTestServer(source, client);
assertTrue(proxy.getMode().isDefault());
for (String mode : Mode.modes()) {
proxy.setMode(mode);
assertEquals(mode, proxy.getMode().name());
}
// Try setting an invalid mode
try {
proxy.setMode("invalid");
assert (false);
} catch (IllegalArgumentException e) {
assertEquals("Unrecognized mode 'invalid' supplied. Legal modes are '" + Mode.modes() + "'", e.getMessage());
}
// Also switch to DEFAULT mode, as that is not covered above
proxy.setMode("default");
assertTrue(proxy.getMode().isDefault());
// Set mode to the same as the current mode
proxy.setMode(proxy.getMode().name());
assertTrue(proxy.getMode().isDefault());
proxy.stop();
}
/**
* Verifies that config is retrieved from the real server when it is not found in the cache,
* that the cache is populated with the config and that the entry in the cache is used
* when it is found there.
*/
@Test
public void testGetConfigAndCaching() {
ConfigTester tester = new ConfigTester();
MemoryCache memoryCache = proxy.memoryCache();
assertEquals(0, memoryCache.size());
RawConfig res = proxy.resolveConfig(tester.createRequest(fooConfig)).orElseThrow();
assertEquals(ConfigTester.fooPayload.toString(), res.getPayload().toString());
assertEquals(1, memoryCache.size());
assertEquals(res, memoryCache.get(new ConfigCacheKey(fooConfig.getKey(), fooConfig.getDefMd5())).orElseThrow());
// Trying same config again
JRTServerConfigRequest newRequestBasedOnResponse = tester.createRequest(res);
RawConfig res2 = proxy.resolveConfig(newRequestBasedOnResponse).orElseThrow();
assertFalse(ProxyServer.configOrGenerationHasChanged(res2, newRequestBasedOnResponse));
assertEquals(1, memoryCache.size());
}
/**
* Verifies that error responses are not cached. When the config has been successfully retrieved,
* it must be updated in cache.
*/
@Test
public void testNoCachingOfErrorRequests() {
ConfigTester tester = new ConfigTester();
// Simulate an error response
source.put(fooConfig.getKey(), createConfigWithNextConfigGeneration(fooConfig, ErrorCode.INTERNAL_ERROR));
MemoryCache memoryCache = proxy.memoryCache();
assertEquals(0, memoryCache.size());
RawConfig res = proxy.resolveConfig(tester.createRequest(fooConfig)).orElseThrow();
assertNotNull(res.getPayload());
assertTrue(res.isError());
assertEquals(0, memoryCache.size());
// Put a version of the same config into backend without error and see that it now works (i.e. we are
// not getting a cached response (of the error in the previous request)
source.put(fooConfig.getKey(), createConfigWithNextConfigGeneration(fooConfig, 0));
// Verify that we get the config now and that it is cached
res = proxy.resolveConfig(tester.createRequest(fooConfig)).orElseThrow();
assertNotNull(res.getPayload().getData());
assertEquals(ConfigTester.fooPayload.toString(), res.getPayload().toString());
assertEquals(1, memoryCache.size());
JRTServerConfigRequest newRequestBasedOnResponse = tester.createRequest(res);
RawConfig res2 = proxy.resolveConfig(newRequestBasedOnResponse).orElseThrow();
assertFalse(ProxyServer.configOrGenerationHasChanged(res2, newRequestBasedOnResponse));
assertEquals(1, memoryCache.size());
}
/**
* Verifies that config with generation 0 (used for empty sentinel config) is not cached.
* If it was cached, it would be served even when newer config is available
* (as they ask for config, saying that it now has config with generation 0).
* When the config has been successfully retrieved it must be updated in cache.
*/
@Test
public void testNoCachingOfEmptyConfig() {
ConfigTester tester = new ConfigTester();
MemoryCache cache = proxy.memoryCache();
assertEquals(0, cache.size());
RawConfig res = proxy.resolveConfig(tester.createRequest(fooConfig)).orElseThrow();
assertNotNull(res);
assertEquals(ConfigTester.fooPayload.toString(), res.getPayload().toString());
assertEquals(1, cache.size());
// Simulate an empty response
RawConfig emptyConfig = new RawConfig(fooConfig.getKey(), fooConfig.getDefMd5(), Payload.from("{}"),
fooConfig.getPayloadChecksums(), 0, false,
0, fooConfig.getDefContent(), Optional.empty());
source.put(fooConfig.getKey(), emptyConfig);
res = proxy.resolveConfig(tester.createRequest(fooConfig)).orElseThrow();
assertEquals(emptyConfig.getPayload().toString(), res.getPayload().toString());
assertEquals(0, cache.size());
// Put a version of the same config into backend with new generation and see that it now works (i.e. we are
// not getting a cached response (of the error in the previous request)
source.put(fooConfig.getKey(), createConfigWithNextConfigGeneration(fooConfig, 0));
// Verify that we get the config now and that it is cached
res = proxy.resolveConfig(tester.createRequest(fooConfig)).orElseThrow();
assertNotNull(res.getPayload().getData());
assertEquals(ConfigTester.fooPayload.toString(), res.getPayload().toString());
assertEquals(1, cache.size());
}
@Test
public void testReconfiguration() {
ConfigTester tester = new ConfigTester();
RawConfig res = proxy.resolveConfig(tester.createRequest(fooConfig)).orElseThrow();
assertEquals(ConfigTester.fooPayload.toString(), res.getPayload().toString());
// Simulate deployment, add config with new config generation
long previousGeneration = res.getGeneration();
source.put(fooConfig.getKey(), createConfigWithNextConfigGeneration(res, 0));
JRTServerConfigRequest newRequestBasedOnResponse = tester.createRequest(res);
RawConfig res2 = proxy.resolveConfig(newRequestBasedOnResponse).orElseThrow();
assertEquals(previousGeneration + 1, res2.getGeneration());
assertTrue(ProxyServer.configOrGenerationHasChanged(res2, newRequestBasedOnResponse));
}
@Test
public void testReadingSystemProperties() {
ProxyServer.Properties properties = ProxyServer.getSystemProperties();
assertEquals(1, properties.configSources.length);
assertEquals(ProxyServer.DEFAULT_PROXY_CONFIG_SOURCES, properties.configSources[0]);
}
private static ProxyServer createTestServer(ConfigSourceSet source, ConfigSourceClient configSourceClient) {
return new ProxyServer(null, source, configSourceClient);
}
static RawConfig createConfigWithNextConfigGeneration(RawConfig config, int errorCode) {
return createConfigWithNextConfigGeneration(config, errorCode, config.getPayload());
}
private static RawConfig createConfigWithNextConfigGeneration(RawConfig config, int errorCode, Payload payload) {
return createConfigWithNextConfigGeneration(config, errorCode, payload, config.getGeneration() + 1);
}
static RawConfig createConfigWithNextConfigGeneration(RawConfig config, int errorCode, Payload payload, long configGeneration) {
return new RawConfig(config.getKey(), config.getDefMd5(),
payload, config.getPayloadChecksums(),
configGeneration, false,
errorCode, config.getDefContent(), Optional.empty());
}
}
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