版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/qq_29726869/article/details/82844827
package com.zx.dao;
import com.zx.utils.PropertiesUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.DFSInotifyEventInputStream;
import org.apache.hadoop.hdfs.client.HdfsAdmin;
import org.apache.hadoop.hdfs.inotify.Event;
import org.apache.hadoop.hdfs.inotify.EventBatch;
import org.apache.hadoop.hdfs.inotify.MissingEventsException;
import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.Properties;
//监控hdfs系统的文件状态
public class MonitorHdfs extends Thread {
private ArrayList<String> fileList = new ArrayList<String>();
public void getFileStatus() throws IOException, InterruptedException, MissingEventsException {
Properties properties = PropertiesUtils.getProperties("spark-conf.properties");
String hdfsPath = (String) properties.get("hdfsPath");
HdfsAdmin admin = new HdfsAdmin( URI.create(hdfsPath), new Configuration() );
DFSInotifyEventInputStream eventStream = admin.getInotifyEventStream();
while( true ) {
EventBatch events = eventStream.take();
for( Event event : events.getEvents() ) {
System.out.println("=======================================================");
System.out.println( "event type = " + event.getEventType() );
switch( event.getEventType() ) {
case CREATE:
Event.CreateEvent createEvent = (Event.CreateEvent) event;
System.out.println( " path = " + createEvent.getPath() );
String filePath = createEvent.getPath();
if(filePath.contains("/upload/")){
if(filePath.contains("._COPYING_")){
filePath = filePath.substring(0,filePath.length()-10);
}
this.fileList.add(filePath);
}
for(String str:fileList){
System.out.println(str);
}
break;
case CLOSE:
Event.CloseEvent closeEvent = (Event.CloseEvent) event;
System.out.println( " path = " + closeEvent.getPath() );
break;
case APPEND:
Event.AppendEvent appendEvent = (Event.AppendEvent) event;
System.out.println( " path = " + appendEvent.getPath() );
break;
case RENAME:
Event.RenameEvent renameEvent = (Event.RenameEvent) event;
System.out.println( " srcPath = " + renameEvent.getSrcPath() );
System.out.println( " dstPath = " + renameEvent.getDstPath() );
break;
case METADATA:
Event.MetadataUpdateEvent metadataUpdateEvent = (Event.MetadataUpdateEvent) event;
System.out.println( " path = " + metadataUpdateEvent.getPath() );
break;
case UNLINK:
Event.UnlinkEvent unlinkEvent = (Event.UnlinkEvent) event;
System.out.println( " path = " + unlinkEvent.getPath() );
break;
default:
break;
}
System.out.println("=======================================================");
}
}
}
public ArrayList<String> getFileList() {
return fileList;
}
public void setFileList(ArrayList<String> fileList) {
this.fileList = fileList;
}
public void clearFileList(){
this.fileList.clear();
}
}