com.persistent.cloudninja.scheduler.TenantDBBandwidthProcessor.java Source code

Introduction

Here is the source code for com.persistent.cloudninja.scheduler.TenantDBBandwidthProcessor.java

Source

/*******************************************************************************
 * Copyright 2012 Persistent Systems Ltd.
 * 
 * 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.persistent.cloudninja.scheduler;

import java.net.URISyntaxException;
import java.security.InvalidKeyException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.TimeZone;

import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.util.StopWatch;

import com.microsoft.windowsazure.services.core.storage.StorageException;
import com.persistent.cloudninja.dao.MeteringDao;
import com.persistent.cloudninja.dao.PartitionStatsAndBWUsageDao;
import com.persistent.cloudninja.dao.TaskCompletionDao;
import com.persistent.cloudninja.domainobject.BandwidthUsageDirection;
import com.persistent.cloudninja.domainobject.DBBandwidthUsageEntity;
import com.persistent.cloudninja.domainobject.MeteringEntity;
import com.persistent.cloudninja.utils.SchedulerSettings;
import com.persistent.cloudninja.utils.StorageClientUtility;

/**
 * Processor for tenant DB bandwidth usage task. It processes the
 * messages generated by generator.
 */
@Component
public class TenantDBBandwidthProcessor extends TaskActivityBase {

    @Autowired
    private TaskCompletionDao taskCompletionDao;

    private static final Logger LOGGER = Logger.getLogger(TenantDBBandwidthProcessor.class);

    @Autowired
    private PartitionStatsAndBWUsageDao partitionStatsAndBWUsageDao;

    @Autowired
    private MeteringDao meteringDao;

    public TenantDBBandwidthProcessor() throws InvalidKeyException, URISyntaxException {
        //tenantdbbandwidthqueue which is shared between processor and generator.
        super(new TenantDBBandwidthQueue(SchedulerSettings.DBBandwidthQueue,
                StorageClientUtility.getCloudStorageAccount().createCloudQueueClient()));
    }

    @Override
    public boolean execute() {
        boolean retVal = true;
        int tenantDBBWsCount = 0;
        try {
            LOGGER.debug("In Processor");
            TenantDBBandwidthQueue queue = (TenantDBBandwidthQueue) getWorkQueue();
            String message = queue.dequeue(SchedulerSettings.MessageVisibilityTimeout);
            if (message == null) {
                retVal = false;
                LOGGER.debug("Processor : msg is null");
            } else {
                StopWatch watch = new StopWatch();
                watch.start();
                LOGGER.debug("Processor : msg is " + message);
                List<DBBandwidthUsageEntity> listDbBandwidthUsageEntities = partitionStatsAndBWUsageDao
                        .getBandwidthUsage();
                tenantDBBWsCount = listDbBandwidthUsageEntities.size();
                Map<String, MeteringEntity> map = new HashMap<String, MeteringEntity>();
                MeteringEntity meteringEntity = null;
                String dbName = null;
                String tenantId = null;

                for (DBBandwidthUsageEntity dbBandwidthUsageEntity : listDbBandwidthUsageEntities) {
                    dbName = dbBandwidthUsageEntity.getDatabaseName();

                    if (dbName.startsWith("tnt_")) {
                        tenantId = dbName.substring(4);
                        if (map.containsKey(tenantId)) {
                            meteringEntity = map.get(tenantId);
                            setDatabaseBandwidth(dbBandwidthUsageEntity, meteringEntity);
                        } else {
                            meteringEntity = new MeteringEntity();
                            meteringEntity.setTenantId(tenantId);
                            setDatabaseBandwidth(dbBandwidthUsageEntity, meteringEntity);
                            map.put(tenantId, meteringEntity);
                        }
                    }
                }

                Calendar calendar = Calendar.getInstance();
                SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.S z");
                dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
                String date = dateFormat.format(calendar.getTime());

                for (Iterator<MeteringEntity> iterator = map.values().iterator(); iterator.hasNext();) {
                    meteringEntity = (MeteringEntity) iterator.next();
                    meteringEntity.setSnapshotTime(dateFormat.parse(date));
                    meteringDao.add(meteringEntity);
                }
                LOGGER.info("Processor : DB bandwidth calculated.");
                watch.stop();
                taskCompletionDao.updateTaskCompletionDetails(watch.getTotalTimeSeconds(),
                        "ProcessMeteringTenantDBBandwidthUse",
                        "Measured the database bandwith use for " + tenantDBBWsCount + " tenants.");
            }
        } catch (StorageException e) {
            retVal = false;
            LOGGER.error(e.getMessage(), e);
        } catch (ParseException e) {
            retVal = false;
            LOGGER.error(e.getMessage(), e);
        }
        return retVal;
    }

    /**
     * Sets the Egress and Ingress in meteringEntity as retrieved from DBBandwidthEntity.
     * 
     * @param dbBandwidthUsageEntity
     * @param meteringEntity
     */
    private void setDatabaseBandwidth(DBBandwidthUsageEntity dbBandwidthUsageEntity,
            MeteringEntity meteringEntity) {
        BandwidthUsageDirection direction = dbBandwidthUsageEntity.getDirection();
        if (direction.compareTo(BandwidthUsageDirection.EGRESS) == 0) {
            meteringEntity.setDatabaseBandwidth_Egress(dbBandwidthUsageEntity.getKiloBytes());
        } else if (direction.compareTo(BandwidthUsageDirection.INGRESS) == 0) {
            meteringEntity.setDatabaseBandwidth_Ingress(dbBandwidthUsageEntity.getKiloBytes());
        }
    }

}