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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.vespa.config.server.application;
import com.yahoo.config.ConfigurationRuntimeException;
import com.yahoo.config.model.api.ApplicationInfo;
import com.yahoo.config.model.api.Model;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.config.provision.Version;
import com.yahoo.log.LogLevel;
import com.yahoo.vespa.config.ConfigCacheKey;
import com.yahoo.vespa.config.ConfigDefinitionKey;
import com.yahoo.vespa.config.ConfigKey;
import com.yahoo.vespa.config.ConfigPayload;
import com.yahoo.vespa.config.GetConfigRequest;
import com.yahoo.vespa.config.buildergen.ConfigDefinition;
import com.yahoo.vespa.config.protocol.ConfigResponse;
import com.yahoo.vespa.config.protocol.DefContent;
import com.yahoo.vespa.config.server.rpc.ConfigResponseFactory;
import com.yahoo.vespa.config.server.ServerCache;
import com.yahoo.vespa.config.server.tenant.TenantRepository;
import com.yahoo.vespa.config.server.rpc.UncompressedConfigResponseFactory;
import com.yahoo.vespa.config.server.UnknownConfigDefinitionException;
import com.yahoo.vespa.config.server.modelfactory.ModelResult;
import com.yahoo.vespa.config.server.monitoring.MetricUpdater;
import com.yahoo.vespa.config.util.ConfigUtils;
import java.util.Objects;
import java.util.Set;
/**
* A Vespa application for a specific version of Vespa. It holds data and metadata associated with
* a Vespa application, i.e. generation, model and zookeeper data, as well as methods for resolving config
* and other queries against the model.
*
* @author Harald Musum
*/
public class Application implements ModelResult {
private static final java.util.logging.Logger log = java.util.logging.Logger.getLogger(Application.class.getName());
private final long appGeneration; // The generation of the set of configs belonging to an application
private final Version vespaVersion;
private final Model model;
private final ServerCache cache;
private final MetricUpdater metricUpdater;
private final ApplicationId app;
public Application(Model model, ServerCache cache, long appGeneration, Version vespaVersion, MetricUpdater metricUpdater, ApplicationId app) {
Objects.requireNonNull(model, "The model cannot be null");
this.model = model;
this.cache = cache;
this.appGeneration = appGeneration;
this.vespaVersion = vespaVersion;
this.metricUpdater = metricUpdater;
this.app = app;
}
/**
* Returns the generation for the config we are currently serving
*
* @return the config generation
*/
public Long getApplicationGeneration() { return appGeneration; }
/** Returns the application model, never null */
@Override
public Model getModel() { return model; }
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("application '").append(app.application().value()).append("', ");
sb.append("generation ").append(appGeneration).append(", ");
sb.append("vespa version ").append(vespaVersion);
return sb.toString();
}
public ApplicationInfo toApplicationInfo() {
return new ApplicationInfo(app, appGeneration, model);
}
public ServerCache getCache() {
return cache;
}
public ApplicationId getId() {
return app;
}
public Version getVespaVersion() {
return vespaVersion;
}
/**
* Gets a config from ZK. Returns null if not found.
*/
public ConfigResponse resolveConfig(GetConfigRequest req, ConfigResponseFactory responseFactory) {
long start = System.currentTimeMillis();
metricUpdater.incrementRequests();
ConfigKey<?> configKey = req.getConfigKey();
String defMd5 = configKey.getMd5();
if (defMd5 == null || defMd5.isEmpty()) {
defMd5 = ConfigUtils.getDefMd5(req.getDefContent().asList());
}
ConfigCacheKey cacheKey = new ConfigCacheKey(configKey, defMd5);
if (logDebug()) {
debug("Resolving config " + cacheKey);
}
if (!req.noCache()) {
ConfigResponse config = cache.get(cacheKey);
if (config != null) {
if (logDebug()) {
debug("Found config " + cacheKey + " in cache");
}
metricUpdater.incrementProcTime(System.currentTimeMillis() - start);
return config;
}
}
ConfigDefinition def = getTargetDef(req);
if (def == null) {
metricUpdater.incrementFailedRequests();
throw new UnknownConfigDefinitionException("Unable to find config definition for '" + configKey.getNamespace() + "." + configKey.getName());
}
if (logDebug()) {
debug("Resolving " + configKey + " with config definition " + def);
}
ConfigPayload payload = model.getConfig(configKey, def);
if (payload == null) {
metricUpdater.incrementFailedRequests();
throw new ConfigurationRuntimeException("Unable to resolve config " + configKey);
}
ConfigResponse configResponse = responseFactory.createResponse(payload, def.getCNode(), appGeneration);
metricUpdater.incrementProcTime(System.currentTimeMillis() - start);
if (!req.noCache()) {
cache.put(cacheKey, configResponse, configResponse.getConfigMd5());
metricUpdater.setCacheConfigElems(cache.configElems());
metricUpdater.setCacheChecksumElems(cache.checkSumElems());
}
return configResponse;
}
private boolean logDebug() {
return log.isLoggable(LogLevel.DEBUG);
}
private void debug(String message) {
log.log(LogLevel.DEBUG, TenantRepository.logPre(getId())+message);
}
private ConfigDefinition getTargetDef(GetConfigRequest req) {
ConfigKey<?> configKey = req.getConfigKey();
DefContent def = req.getDefContent();
ConfigDefinitionKey configDefinitionKey = new ConfigDefinitionKey(configKey.getName(), configKey.getNamespace());
if (def.isEmpty()) {
if (logDebug()) {
debug("No config schema in request for " + configKey);
}
return cache.getDef(configDefinitionKey);
} else {
if (logDebug()) {
debug("Got config schema from request, length:" + def.asList().size() + " : " + configKey);
}
return new ConfigDefinition(configKey.getName(), def.asStringArray());
}
}
void updateHostMetrics(int numHosts) {
metricUpdater.setHosts(numHosts);
}
// For testing only
ConfigResponse resolveConfig(GetConfigRequest req) {
return resolveConfig(req, new UncompressedConfigResponseFactory());
}
public Set<ConfigKey<?>> allConfigsProduced() {
return model.allConfigsProduced();
}
public Set<String> allConfigIds() {
return model.allConfigIds();
}
}
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