com.netflix.astyanax.recipes.queue.shard.TimeModShardPolicy Maven / Gradle / Ivy
/**
* Copyright 2013 Netflix, Inc.
*
* 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.netflix.astyanax.recipes.queue.shard;
import com.netflix.astyanax.recipes.queue.Message;
import com.netflix.astyanax.recipes.queue.MessageQueueMetadata;
/**
* Sharding based on time. This policy assumes that the
* next trigger time in the message has a 'unique' incrementing
* lower bits.
*
* @author elandau
*
*/
public class TimeModShardPolicy implements ModShardPolicy {
private static TimeModShardPolicy instance = new TimeModShardPolicy();
public static ModShardPolicy getInstance() {
return instance;
}
@Override
public int getMessageShard(Message message, MessageQueueMetadata settings) {
return (int) (message.getTokenTime() % settings.getShardCount());
}
}