package com.alibaba.jstorm.task.master.metrics;


import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.alibaba.jstorm.metric.TopologyMetricContext;
import com.alibaba.jstorm.task.master.TMHandler;
import com.alibaba.jstorm.task.master.TopologyMaster;
import com.alibaba.jstorm.task.master.TopologyMasterContext;

import backtype.storm.generated.WorkerUploadMetrics;
import backtype.storm.tuple.Tuple;

/**
 * updates metric data for topology workers
 */
@SuppressWarnings("unused")
public class MetricsUpdater implements TMHandler {
    static private final Logger LOG = LoggerFactory.getLogger(MetricsUpdater.class);
    static private final Logger metricLogger = TopologyMetricContext.LOG;

    private TopologyMetricContext topologyMetricContext;
    private TopologyMasterContext tmContext;

    @Override
    public void init(TopologyMasterContext tmContext) {
        this.tmContext = tmContext;
        this.topologyMetricContext = tmContext.getTopologyMetricContext();
    }

    @Override
    public void process(Object event) {
        Tuple input = (Tuple) event;
        updateMetrics(input);
    }

    @Override
    public void cleanup() {
    }

    private void updateMetrics(Tuple input) {
        String workerSlot = (String) input.getValueByField(TopologyMaster.FIELD_METRIC_WORKER);
        WorkerUploadMetrics metrics = (WorkerUploadMetrics) input.getValueByField(TopologyMaster.FIELD_METRIC_METRICS);
        topologyMetricContext.addToMemCache(workerSlot, metrics.get_allMetrics());
        metricLogger.info("received metrics from:{}, size:{}", workerSlot, metrics.get_allMetrics().get_metrics_size());
    }

}