Java ProtobufUtil.toScanMetrics方法代码示例

import org.apache.hadoop.hbase.protobuf.ProtobufUtil; //导入方法依赖的package包/类
private ScanMetrics getScanMetrics(Scan scan) throws Exception {
  byte[] serializedMetrics = scan.getAttribute(Scan.SCAN_ATTRIBUTES_METRICS_DATA);
  assertTrue("Serialized metrics were not found.", serializedMetrics != null);

  ScanMetrics scanMetrics = ProtobufUtil.toScanMetrics(serializedMetrics);

  return scanMetrics;
}
 

import org.apache.hadoop.hbase.protobuf.ProtobufUtil; //导入方法依赖的package包/类
/**
 * @return Metrics on this Scan, if metrics were enabled.
 * @see #setScanMetricsEnabled(boolean)
 */
public ScanMetrics getScanMetrics() {
  byte [] bytes = getAttribute(Scan.SCAN_ATTRIBUTES_METRICS_DATA);
  if (bytes == null) return null;
  return ProtobufUtil.toScanMetrics(bytes);
}
 

import org.apache.hadoop.hbase.protobuf.ProtobufUtil; //导入方法依赖的package包/类
/**
 * Publish the scan metrics. For now, we use scan.setAttribute to pass the metrics back to the
 * application or TableInputFormat.Later, we could push it to other systems. We don't use
 * metrics framework because it doesn't support multi-instances of the same metrics on the same
 * machine; for scan/map reduce scenarios, we will have multiple scans running at the same time.
 *
 * By default, scan metrics are disabled; if the application wants to collect them, this
 * behavior can be turned on by calling calling {@link Scan#setScanMetricsEnabled(boolean)}
 * 
 * <p>This invocation clears the scan metrics. Metrics are aggregated in the Scan instance.
 */
protected void writeScanMetrics() {
  if (this.scanMetrics == null || scanMetricsPublished) {
    return;
  }
  MapReduceProtos.ScanMetrics pScanMetrics = ProtobufUtil.toScanMetrics(scanMetrics);
  scan.setAttribute(Scan.SCAN_ATTRIBUTES_METRICS_DATA, pScanMetrics.toByteArray());
  scanMetricsPublished = true;
}