modify the cat metric graph builder

cat-home/src/main/java/com/dianping/cat/report/baseline/impl/DefaultBaselineService.java

@@ -43,7 +43,8 @@ public class DefaultBaselineService implements BaselineService {
 
 		if (baseline == null) {
 			try {
-				baseline = m_baselineDao.findByReportNameKeyTime(reportPeriod, reportName, key, BaselineEntity.READSET_FULL);
+				baseline = m_baselineDao
+				      .findByReportNameKeyTime(reportPeriod, reportName, key, BaselineEntity.READSET_FULL);
 				m_baselineMap.put(baselineKey, baseline);
 			} catch (DalNotFoundException e) {
 				Cat.logEvent("BaselineNotFound", baselineKey);
@@ -67,14 +68,13 @@ public class DefaultBaselineService implements BaselineService {
 		double[] result = new double[60];
 		Date today = TaskHelper.todayZero(reportPeriod);
 		int hour = (int) ((reportPeriod.getTime() - today.getTime()) / TimeUtil.ONE_HOUR);
-
 		double[] dayResult = queryDailyBaseline(reportName, key, today);
-		if (dayResult == null)
-			return null;
-		for (int i = 0; i < 60; i++) {
-			result[i] = dayResult[hour * 60 + i];
-		}
 
+		if (dayResult != null) {
+			for (int i = 0; i < 60; i++) {
+				result[i] = dayResult[hour * 60 + i];
+			}
+		}
 		return result;
 	}
 

cat-home/src/main/java/com/dianping/cat/report/page/metric/chart/impl/CachedMetricReportServiceImpl.java

@@ -25,7 +25,7 @@ public class CachedMetricReportServiceImpl implements CachedMetricReportService
 	@Inject
 	private ModelService<MetricReport> m_service;
 
-	private final Map<String, MetricReport> m_metricReportMap = new LinkedHashMap<String, MetricReport>() {
+	private final Map<String, MetricReport> m_metricReports = new LinkedHashMap<String, MetricReport>() {
 
 		private static final long serialVersionUID = 1L;
 
@@ -37,13 +37,13 @@ public class CachedMetricReportServiceImpl implements CachedMetricReportService
 
 	private MetricReport getReportFromDB(String product, long date) {
 		String key = product + date;
-		MetricReport result = m_metricReportMap.get(key);
+		MetricReport result = m_metricReports.get(key);
 		if (result == null) {
 			Date start = new Date(date);
 			Date end = new Date(date + TimeUtil.ONE_HOUR);
 			try {
 				result = m_reportService.queryMetricReport(product, start, end);
-				m_metricReportMap.put(key, result);
+				m_metricReports.put(key, result);
 			} catch (Exception e) {
 				Cat.logError(e);
 			}
@@ -61,6 +61,7 @@ public class CachedMetricReportServiceImpl implements CachedMetricReportService
 			if (m_service.isEligable(request)) {
 				ModelResponse<MetricReport> response = m_service.invoke(request);
 				MetricReport report = response.getModel();
+				
 				return report;
 			} else {
 				throw new RuntimeException("Internal error: no eligable metric service registered for " + request + "!");

cat-home/src/main/java/com/dianping/cat/report/page/metric/chart/impl/MetricDataFetcherImpl.java

@@ -51,12 +51,13 @@ public class MetricDataFetcherImpl implements MetricDataFetcher {
 		return values;
 	}
 
-	private void putKey(Map<String, double[]> datas, Map<String, double[]> values, String sumKey) {
-	   double[] value = datas.get(sumKey);
+	private void putKey(Map<String, double[]> datas, Map<String, double[]> values, String key) {
+	   double[] value = datas.get(key);
+	   
 	   if(value ==null){
 	   	value = new double[60];
 	   }
-	   values.put(sumKey, value);
+	   values.put(key, value);
    }
 
 	public class MetricDataBuilder extends BaseVisitor {

cat-home/src/main/java/com/dianping/cat/report/page/model/metric/MetricReportMerger.java

@@ -10,7 +10,6 @@ public class MetricReportMerger extends DefaultMerger {
 
 	public MetricReportMerger(MetricReport metricReport) {
 		super(metricReport);
-
 	}
 	
 	@Override