本文整理汇总了Java中org.apache.hadoop.hbase.catalog.MetaReader.Visitor类的典型用法代码示例。如果您正苦于以下问题：Java Visitor类的具体用法？Java Visitor怎么用？Java Visitor使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
Visitor类属于org.apache.hadoop.hbase.catalog.MetaReader包，在下文中一共展示了Visitor类的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: initialize
import org.apache.hadoop.hbase.catalog.MetaReader.Visitor; //导入依赖的package包/类
/**
* Initialize the region assignment snapshot by scanning the hbase:meta table
* @throws IOException
*/
public void initialize() throws IOException {
LOG.info("Start to scan the hbase:meta for the current region assignment " +
"snappshot");
// TODO: at some point this code could live in the MetaReader
Visitor v = new Visitor() {
@Override
public boolean visit(Result result) throws IOException {
try {
if (result == null || result.isEmpty()) return true;
Pair<HRegionInfo, ServerName> regionAndServer =
HRegionInfo.getHRegionInfoAndServerName(result);
HRegionInfo hri = regionAndServer.getFirst();
if (hri == null) return true;
if (hri.getTable() == null) return true;
if (disabledTables.contains(hri.getTable())) {
return true;
}
// Are we to include split parents in the list?
if (excludeOfflinedSplitParents && hri.isSplit()) return true;
// Add the current assignment to the snapshot
addAssignment(hri, regionAndServer.getSecond());
addRegion(hri);
// the code below is to handle favored nodes
byte[] favoredNodes = result.getValue(HConstants.CATALOG_FAMILY,
FavoredNodeAssignmentHelper.FAVOREDNODES_QUALIFIER);
if (favoredNodes == null) return true;
// Add the favored nodes into assignment plan
ServerName[] favoredServerList =
FavoredNodeAssignmentHelper.getFavoredNodesList(favoredNodes);
// Add the favored nodes into assignment plan
existingAssignmentPlan.updateFavoredNodesMap(hri,
Arrays.asList(favoredServerList));
return true;
} catch (RuntimeException e) {
LOG.error("Catche remote exception " + e.getMessage() +
" when processing" + result);
throw e;
}
}
};
// Scan hbase:meta to pick up user regions
MetaReader.fullScan(tracker, v);
//regionToRegionServerMap = regions;
LOG.info("Finished to scan the hbase:meta for the current region assignment" +
"snapshot");
}