com.rackspacecloud.blueflood.service.ShardStatePusher Maven / Gradle / Ivy

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/*
 * Copyright 2013 Rackspace
 *
 *    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.rackspacecloud.blueflood.service;

import com.rackspacecloud.blueflood.io.AstyanaxWriter;
import com.rackspacecloud.blueflood.rollup.Granularity;
import com.rackspacecloud.blueflood.utils.TimeValue;
import com.netflix.astyanax.connectionpool.exceptions.ConnectionException;
import com.yammer.metrics.core.TimerContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Collection;
import java.util.Map;
import java.util.concurrent.TimeUnit;

class ShardStatePusher extends ShardStateWorker {
    private static final Logger log = LoggerFactory.getLogger(ShardStatePusher.class);

    ShardStatePusher(final Collection allShards, ShardStateManager stateManager) {
        super(allShards, stateManager, new TimeValue(Configuration.getIntegerProperty("SHARD_PUSH_PERIOD"), TimeUnit.MILLISECONDS));
    }
    
    public void performOperation() {
        TimerContext ctx = timer.time();
        try {
            AstyanaxWriter writer = AstyanaxWriter.getInstance();
            for (int shard : allShards) {
                Map> slotTimes = shardStateManager.getDirtySlotsToPersist(shard);
                if (slotTimes != null) {
                    try {
                        writer.persistShardState(shard, slotTimes);
                    } catch (ConnectionException ex) {
                        log.error("Could not write shard state to the database (shard " + shard + "). " + ex.getMessage(), ex);
                    }
                }
            }
        } catch (RuntimeException ex) {
            log.error("Could not write shard states to the database. " + ex.getMessage(), ex);
        } finally {
            ctx.stop();
        }
    }
}