本文整理汇总了Java中org.apache.hadoop.net.NetUtils.getHostNameOfIP方法的典型用法代码示例。如果您正苦于以下问题：Java NetUtils.getHostNameOfIP方法的具体用法？Java NetUtils.getHostNameOfIP怎么用？Java NetUtils.getHostNameOfIP使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.hadoop.net.NetUtils的用法示例。
在下文中一共展示了NetUtils.getHostNameOfIP方法的2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: printTopology
import org.apache.hadoop.net.NetUtils; //导入方法依赖的package包/类
/**
* Display each rack and the nodes assigned to that rack, as determined
* by the NameNode, in a hierarchical manner. The nodes and racks are
* sorted alphabetically.
*
* @throws IOException If an error while getting datanode report
*/
public int printTopology() throws IOException {
DistributedFileSystem dfs = getDFS();
final DatanodeInfo[] report = dfs.getDataNodeStats();
// Build a map of rack -> nodes from the datanode report
HashMap<String, TreeSet<String> > tree = new HashMap<String, TreeSet<String>>();
for(DatanodeInfo dni : report) {
String location = dni.getNetworkLocation();
String name = dni.getName();
if(!tree.containsKey(location)) {
tree.put(location, new TreeSet<String>());
}
tree.get(location).add(name);
}
// Sort the racks (and nodes) alphabetically, display in order
ArrayList<String> racks = new ArrayList<String>(tree.keySet());
Collections.sort(racks);
for(String r : racks) {
System.out.println("Rack: " + r);
TreeSet<String> nodes = tree.get(r);
for(String n : nodes) {
System.out.print(" " + n);
String hostname = NetUtils.getHostNameOfIP(n);
if(hostname != null)
System.out.print(" (" + hostname + ")");
System.out.println();
}
System.out.println();
}
return 0;
}
示例2: getDatanodeReport
import org.apache.hadoop.net.NetUtils; //导入方法依赖的package包/类
/** A formatted string for reporting the status of the DataNode. */
public String getDatanodeReport() {
StringBuilder buffer = new StringBuilder();
long c = getCapacity();
long r = getRemaining();
long u = getDfsUsed();
long nonDFSUsed = getNonDfsUsed();
float usedPercent = getDfsUsedPercent();
float remainingPercent = getRemainingPercent();
long cc = getCacheCapacity();
long cr = getCacheRemaining();
long cu = getCacheUsed();
float cacheUsedPercent = getCacheUsedPercent();
float cacheRemainingPercent = getCacheRemainingPercent();
String lookupName = NetUtils.getHostNameOfIP(getName());
buffer.append("Name: "+ getName());
if (lookupName != null) {
buffer.append(" (" + lookupName + ")");
}
buffer.append("\n");
buffer.append("Hostname: " + getHostName() + "\n");
if (!NetworkTopology.DEFAULT_RACK.equals(location)) {
buffer.append("Rack: "+location+"\n");
}
buffer.append("Decommission Status : ");
if (isDecommissioned()) {
buffer.append("Decommissioned\n");
} else if (isDecommissionInProgress()) {
buffer.append("Decommission in progress\n");
} else {
buffer.append("Normal\n");
}
buffer.append("Configured Capacity: "+c+" ("+StringUtils.byteDesc(c)+")"+"\n");
buffer.append("DFS Used: "+u+" ("+StringUtils.byteDesc(u)+")"+"\n");
buffer.append("Non DFS Used: "+nonDFSUsed+" ("+StringUtils.byteDesc(nonDFSUsed)+")"+"\n");
buffer.append("DFS Remaining: " +r+ " ("+StringUtils.byteDesc(r)+")"+"\n");
buffer.append("DFS Used%: "+percent2String(usedPercent) + "\n");
buffer.append("DFS Remaining%: "+percent2String(remainingPercent) + "\n");
buffer.append("Configured Cache Capacity: "+cc+" ("+StringUtils.byteDesc(cc)+")"+"\n");
buffer.append("Cache Used: "+cu+" ("+StringUtils.byteDesc(cu)+")"+"\n");
buffer.append("Cache Remaining: " +cr+ " ("+StringUtils.byteDesc(cr)+")"+"\n");
buffer.append("Cache Used%: "+percent2String(cacheUsedPercent) + "\n");
buffer.append("Cache Remaining%: "+percent2String(cacheRemainingPercent) + "\n");
buffer.append("Xceivers: "+getXceiverCount()+"\n");
buffer.append("Last contact: "+new Date(lastUpdate)+"\n");
return buffer.toString();
}