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BaseServerConfigLoader.java
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BaseServerConfigLoader.java
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/*
* Copyright (c) 2002-2016 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.server.configuration;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import org.neo4j.bolt.BoltKernelExtension;
import org.neo4j.graphdb.factory.GraphDatabaseSettings;
import org.neo4j.helpers.collection.MapUtil;
import org.neo4j.helpers.collection.Pair;
import org.neo4j.kernel.configuration.Config;
import org.neo4j.logging.Log;
import org.neo4j.shell.ShellSettings;
import static java.util.Arrays.asList;
import static java.util.Collections.emptyMap;
import static org.neo4j.kernel.configuration.Settings.TRUE;
public class BaseServerConfigLoader
{
public Config loadConfig( File configFile, File legacyConfigFile, Log log, Pair<String, String> ... configOverrides )
{
if ( log == null )
{
throw new IllegalArgumentException( "log cannot be null ");
}
Config config = new Config( emptyMap(), asList( ServerSettings.class, GraphDatabaseSettings.class ) );
config.setLogger( log );
// For now, don't print warnings if this file is not specified
if( configFile != null && configFile.exists() )
{
config.augment( loadFromFile( log, configFile ) );
}
config.augment( loadFromFile( log, legacyConfigFile ) );
overrideEmbeddedDefaults( config );
applyUserOverrides( config, configOverrides );
return config;
}
private void applyUserOverrides( Config config, Pair<String,String>[] configOverrides )
{
Map<String,String> params = config.getParams();
for ( Pair<String,String> configOverride : configOverrides )
{
params.put( configOverride.first(), configOverride.other() );
}
config.applyChanges( params );
}
/**
* This is a smell - this means docs will say defaults are something other than what they are in the server. Better make embedded the special case and
* set the defaults to be what the server will have.
*
* In any case - this overrides embedded defaults.
*/
private static void overrideEmbeddedDefaults( Config config )
{
Map<String,String> params = config.getParams();
if ( !params.containsKey( ShellSettings.remote_shell_enabled.name() ) )
{
params.put( ShellSettings.remote_shell_enabled.name(), TRUE );
}
if ( !params.containsKey( GraphDatabaseSettings.log_queries_filename.name() ) )
{
params.put( GraphDatabaseSettings.log_queries_filename.name(), "data/log/queries.log" );
}
if( !params.containsKey( BoltKernelExtension.Settings.enabled.name() ))
{
params.put( BoltKernelExtension.Settings.enabled.name(), "true" );
}
if( !params.containsKey( GraphDatabaseSettings.auth_enabled.name() ))
{
params.put( GraphDatabaseSettings.auth_enabled.name(), "true" );
}
config.applyChanges( params );
}
private static Map<String,String> loadFromFile( Log log, File file )
{
if ( file == null )
{
return new HashMap<>();
}
if ( file.exists() )
{
try
{
return MapUtil.load( file );
}
catch ( IOException e )
{
log.error( "Unable to load config file [%s]: %s", file, e.getMessage() );
}
}
else
{
log.warn( "Config file [%s] does not exist.", file );
}
// Default to no user-defined config if no config was found
return new HashMap<>();
}
}