| /* |
| * 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.cassandra.locator; |
| |
| import java.util.Collections; |
| import java.util.Collection; |
| import java.util.Map; |
| |
| import org.apache.cassandra.config.DatabaseDescriptor; |
| import org.apache.cassandra.exceptions.ConfigurationException; |
| import org.apache.cassandra.dht.RingPosition; |
| import org.apache.cassandra.dht.Token; |
| import org.apache.cassandra.utils.FBUtilities; |
| |
| public class LocalStrategy extends AbstractReplicationStrategy |
| { |
| private static final ReplicationFactor RF = ReplicationFactor.fullOnly(1); |
| private final EndpointsForRange replicas; |
| |
| public LocalStrategy(String keyspaceName, TokenMetadata tokenMetadata, IEndpointSnitch snitch, Map<String, String> configOptions) |
| { |
| super(keyspaceName, tokenMetadata, snitch, configOptions); |
| replicas = EndpointsForRange.of( |
| new Replica(FBUtilities.getBroadcastAddressAndPort(), |
| DatabaseDescriptor.getPartitioner().getMinimumToken(), |
| DatabaseDescriptor.getPartitioner().getMinimumToken(), |
| true |
| ) |
| ); |
| } |
| |
| /** |
| * We need to override this even if we override calculateNaturalReplicas, |
| * because the default implementation depends on token calculations but |
| * LocalStrategy may be used before tokens are set up. |
| */ |
| @Override |
| public EndpointsForRange getNaturalReplicas(RingPosition<?> searchPosition) |
| { |
| return replicas; |
| } |
| |
| public EndpointsForRange calculateNaturalReplicas(Token token, TokenMetadata metadata) |
| { |
| return replicas; |
| } |
| |
| public ReplicationFactor getReplicationFactor() |
| { |
| return RF; |
| } |
| |
| public void validateOptions() throws ConfigurationException |
| { |
| } |
| |
| @Override |
| public void maybeWarnOnOptions() |
| { |
| } |
| |
| @Override |
| public Collection<String> recognizedOptions() |
| { |
| // LocalStrategy doesn't expect any options. |
| return Collections.emptySet(); |
| } |
| } |