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FilteringPolicyLoader.java
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FilteringPolicyLoader.java
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/*
* Copyright (c) 2002-2017 "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 Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.causalclustering.load_balancing.plugins.server_policies;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import org.neo4j.causalclustering.load_balancing.filters.Filter;
import org.neo4j.kernel.configuration.Config;
import org.neo4j.logging.LogProvider;
import static java.lang.String.format;
import static org.neo4j.causalclustering.core.CausalClusteringSettings.load_balancing_config;
/**
* Loads filters under the name space of a particular plugin.
*/
class FilteringPolicyLoader
{
static Policies load( Config config, String pluginName, LogProvider logProvider ) throws InvalidFilterSpecification
{
Policies policies = new Policies( logProvider );
String prefix = policyPrefix( pluginName );
Map<String,String> rawConfig = config.getRaw();
Set<String> configKeys = rawConfig.keySet().stream()
.filter( e -> e.startsWith( prefix ) )
.collect( Collectors.toSet() );
for ( String configKey : configKeys )
{
String policyName = configKey.substring( prefix.length() );
String filterSpec = rawConfig.get( configKey );
Filter<ServerInfo> filter = FilterConfigParser.parse( filterSpec );
policies.addPolicy( policyName, new FilteringPolicy( filter ) );
}
return policies;
}
private static String policyPrefix( String pluginName )
{
return format( "%s.%s.", load_balancing_config.name(), pluginName );
}
}