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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.solr.core;
import java.io.IOException;
import java.lang.invoke.MethodHandles;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.time.Instant;
import java.util.Locale;
import java.util.concurrent.ExecutionException;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import org.apache.solr.cloud.CloudConfigSetService;
import org.apache.solr.cloud.ZkController;
import org.apache.solr.cloud.ZkSolrResourceLoader;
import org.apache.solr.common.SolrException;
import org.apache.solr.common.util.NamedList;
import org.apache.solr.schema.IndexSchema;
import org.apache.solr.schema.IndexSchemaFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Service class used by the CoreContainer to load ConfigSets for use in SolrCore
* creation.
*/
public abstract class ConfigSetService {
private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
public static ConfigSetService createConfigSetService(NodeConfig nodeConfig, SolrResourceLoader loader, ZkController zkController) {
if (zkController != null)
return new CloudConfigSetService(loader, zkController);
if (nodeConfig.hasSchemaCache())
return new SchemaCaching(loader, nodeConfig.getConfigSetBaseDirectory());
return new Default(loader, nodeConfig.getConfigSetBaseDirectory());
}
protected final SolrResourceLoader parentLoader;
/**
* Create a new ConfigSetService
* @param loader the CoreContainer's resource loader
*/
public ConfigSetService(SolrResourceLoader loader) {
this.parentLoader = loader;
}
/**
* Load the ConfigSet for a core
* @param dcore the core's CoreDescriptor
* @return a ConfigSet
*/
public final ConfigSet getConfig(CoreDescriptor dcore) {
SolrResourceLoader coreLoader = createCoreResourceLoader(dcore);
try {
// ConfigSet properties are loaded from ConfigSetProperties.DEFAULT_FILENAME file.
// ConfigSet flags are loaded from the metadata of the ZK node of the configset.
NamedList properties = createConfigSetProperties(dcore, coreLoader);
NamedList flags = getConfigSetFlags(dcore, coreLoader);
boolean trusted =
(coreLoader instanceof ZkSolrResourceLoader
&& flags != null
&& flags.get("trusted") != null
&& !flags.getBooleanArg("trusted")
) ? false: true;
SolrConfig solrConfig = createSolrConfig(dcore, coreLoader, trusted);
IndexSchema schema = createIndexSchema(dcore, solrConfig);
return new ConfigSet(configName(dcore), solrConfig, schema, properties, trusted);
} catch (Exception e) {
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR,
"Could not load conf for core " + dcore.getName() +
": " + e.getMessage(), e);
}
}
/**
* Create a SolrConfig object for a core
* @param cd the core's CoreDescriptor
* @param loader the core's resource loader
* @param isTrusted is the configset trusted?
* @return a SolrConfig object
*/
protected SolrConfig createSolrConfig(CoreDescriptor cd, SolrResourceLoader loader, boolean isTrusted) {
return SolrConfig.readFromResourceLoader(loader, cd.getConfigName(), isTrusted);
}
/**
* Create an IndexSchema object for a core
* @param cd the core's CoreDescriptor
* @param solrConfig the core's SolrConfig
* @return an IndexSchema
*/
protected IndexSchema createIndexSchema(CoreDescriptor cd, SolrConfig solrConfig) {
return IndexSchemaFactory.buildIndexSchema(cd.getSchemaName(), solrConfig);
}
/**
* Return the ConfigSet properties
* @param cd the core's CoreDescriptor
* @param loader the core's resource loader
* @return the ConfigSet properties
*/
protected NamedList createConfigSetProperties(CoreDescriptor cd, SolrResourceLoader loader) {
return ConfigSetProperties.readFromResourceLoader(loader, cd.getConfigSetPropertiesName());
}
protected NamedList getConfigSetFlags(CoreDescriptor cd, SolrResourceLoader loader) {
if (loader instanceof ZkSolrResourceLoader) {
try {
return ConfigSetProperties.readFromResourceLoader(loader, ".");
} catch (Exception ex) {
return null;
}
} else {
return null;
}
}
/**
* Create a SolrResourceLoader for a core
* @param cd the core's CoreDescriptor
* @return a SolrResourceLoader
*/
protected abstract SolrResourceLoader createCoreResourceLoader(CoreDescriptor cd);
/**
* Return a name for the ConfigSet for a core
* @param cd the core's CoreDescriptor
* @return a name for the core's ConfigSet
*/
public abstract String configName(CoreDescriptor cd);
/**
* The default ConfigSetService.
*
* Loads a ConfigSet defined by the core's configSet property,
* looking for a directory named for the configSet property value underneath
* a base directory. If no configSet property is set, loads the ConfigSet
* instead from the core's instance directory.
*/
public static class Default extends ConfigSetService {
private final Path configSetBase;
/**
* Create a new ConfigSetService.Default
* @param loader the CoreContainer's resource loader
* @param configSetBase the base directory under which to look for config set directories
*/
public Default(SolrResourceLoader loader, Path configSetBase) {
super(loader);
this.configSetBase = configSetBase;
}
@Override
public SolrResourceLoader createCoreResourceLoader(CoreDescriptor cd) {
Path instanceDir = locateInstanceDir(cd);
return new SolrResourceLoader(instanceDir, parentLoader.getClassLoader(), cd.getSubstitutableProperties());
}
@Override
public String configName(CoreDescriptor cd) {
return (cd.getConfigSet() == null ? "instancedir " : "configset ") + locateInstanceDir(cd);
}
protected Path locateInstanceDir(CoreDescriptor cd) {
String configSet = cd.getConfigSet();
if (configSet == null)
return cd.getInstanceDir();
Path configSetDirectory = configSetBase.resolve(configSet);
if (!Files.isDirectory(configSetDirectory))
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR,
"Could not load configuration from directory " + configSetDirectory);
return configSetDirectory;
}
}
/**
* A ConfigSetService that shares schema objects between cores
*/
public static class SchemaCaching extends Default {
private final Cache schemaCache = CacheBuilder.newBuilder().build();
public SchemaCaching(SolrResourceLoader loader, Path configSetBase) {
super(loader, configSetBase);
}
public static String cacheName(Path schemaFile) throws IOException {
long lastModified = Files.getLastModifiedTime(schemaFile).toMillis();
return String.format(Locale.ROOT, "%s:%s",
schemaFile.toString(), Instant.ofEpochMilli(lastModified).toString());
}
@Override
public IndexSchema createIndexSchema(final CoreDescriptor cd, final SolrConfig solrConfig) {
final String resourceNameToBeUsed = IndexSchemaFactory.getResourceNameToBeUsed(cd.getSchemaName(), solrConfig);
Path schemaFile = Paths.get(solrConfig.getResourceLoader().getConfigDir()).resolve(resourceNameToBeUsed);
if (Files.exists(schemaFile)) {
try {
String cachedName = cacheName(schemaFile);
return schemaCache.get(cachedName, () -> {
log.info("Creating new index schema for core {}", cd.getName());
return IndexSchemaFactory.buildIndexSchema(cd.getSchemaName(), solrConfig);
});
} catch (ExecutionException e) {
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR,
"Error creating index schema for core " + cd.getName(), e);
} catch (IOException e) {
log.warn("Couldn't get last modified time for schema file {}: {}", schemaFile, e.getMessage());
log.warn("Will not use schema cache");
}
}
return IndexSchemaFactory.buildIndexSchema(cd.getSchemaName(), solrConfig);
}
}
}
