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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;
import com.yahoo.config.ConfigInstance;
import com.yahoo.config.codegen.DefParser;
import com.yahoo.config.codegen.InnerCNode;
import com.yahoo.config.model.api.ConfigDefinitionRepo;
import com.yahoo.config.provision.ApplicationId;
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.model.SuperModelConfigProvider;
import com.yahoo.vespa.config.server.rpc.ConfigResponseFactory;
import java.io.IOException;
import java.io.StringReader;
/**
* Handler for global configs that must be resolved using the global SuperModel instance. Deals with
* reloading of config as well.
*
* @author lulf
* @since 5.9
*/
public class SuperModelController {
private final SuperModelConfigProvider model;
private final long generation;
private final ConfigDefinitionRepo configDefinitionRepo;
private final ConfigResponseFactory responseFactory;
public SuperModelController(SuperModelConfigProvider model, ConfigDefinitionRepo configDefinitionRepo, long generation, ConfigResponseFactory responseFactory) {
this.model = model;
this.configDefinitionRepo = configDefinitionRepo;
this.generation = generation;
this.responseFactory = responseFactory;
}
/**
* Resolves global config for given request.
*
* @param request The {@link com.yahoo.vespa.config.GetConfigRequest} to find config for.
* @return a {@link com.yahoo.vespa.config.protocol.ConfigResponse} containing the response for this request.
* @throws java.lang.IllegalArgumentException if no such config was found.
*/
public ConfigResponse resolveConfig(GetConfigRequest request) {
ConfigKey<?> configKey = request.getConfigKey();
InnerCNode targetDef = getConfigDefinition(request.getConfigKey(), request.getDefContent());
ConfigPayload payload = model.getConfig(configKey);
return responseFactory.createResponse(payload, targetDef, generation);
}
private InnerCNode getConfigDefinition(ConfigKey<?> configKey, DefContent defContent) {
if (defContent.isEmpty()) {
ConfigDefinitionKey configDefinitionKey = new ConfigDefinitionKey(configKey.getName(), configKey.getNamespace());
ConfigDefinition configDefinition = configDefinitionRepo.getConfigDefinitions().get(configDefinitionKey);
if (configDefinition == null) {
throw new UnknownConfigDefinitionException("Unable to find config definition for '" + configKey.getNamespace() + "." + configKey.getName());
}
return configDefinition.getCNode();
} else {
DefParser dParser = new DefParser(configKey.getName(), new StringReader(defContent.asString()));
return dParser.getTree();
}
}
public SuperModelConfigProvider getSuperModel() {
return model;
}
long getGeneration() { return generation; }
public <CONFIGTYPE extends ConfigInstance> CONFIGTYPE getConfig(Class<CONFIGTYPE> configClass, ApplicationId applicationId, String configId) throws IOException {
return model.getConfig(configClass, applicationId, configId);
}
}
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