com.lambdaworks.redis.cluster.DynamicNodeSelection Maven / Gradle / Ivy

Go to download
/*
 * Copyright 2011-2016 the original author or authors.
 *
 * Licensed 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 com.lambdaworks.redis.cluster;

import java.util.List;
import java.util.function.Predicate;
import java.util.stream.Collectors;

import com.lambdaworks.redis.cluster.api.StatefulRedisClusterConnection;
import com.lambdaworks.redis.cluster.models.partitions.RedisClusterNode;

/**
 * Dynamic selection of nodes.
 * 
 * @param  API type.
 * @param  Command command interface type to invoke multi-node operations.
 * @param  Key type.
 * @param  Value type.
 * @author Mark Paluch
 */
abstract class DynamicNodeSelection extends AbstractNodeSelection {

    private final Predicate selector;

    public DynamicNodeSelection(StatefulRedisClusterConnection globalConnection, Predicate selector,
            ClusterConnectionProvider.Intent intent) {
        super(globalConnection, intent);
        this.selector = selector;
    }

    @Override
    protected List nodes() {
        return globalConnection.getPartitions().getPartitions().stream().filter(selector).collect(Collectors.toList());
    }
}