Hadoop实战-Flume之自定义Sink(十九)

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.flume.Channel;
import org.apache.flume.Context;
import org.apache.flume.Event;
import org.apache.flume.EventDeliveryException;
import org.apache.flume.Transaction;
import org.apache.flume.conf.Configurable;
import org.apache.flume.sink.AbstractSink;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class MySinks extends AbstractSink implements Configurable {

private static final Logger logger = LoggerFactory.getLogger(MySinks.class);

private static final String PROP_KEY_ROOTPATH = "fileName";

private String fileName;

@Override
public Status process() throws EventDeliveryException {
// TODO Auto-generated method stub

Channel ch = getChannel();
Transaction txn = ch.getTransaction();
Event event = null;
txn.begin();
while (true) {
event = ch.take();
if (event != null) {
break;
}
}
try {
logger.debug("Get event.");
String body = new String(event.getBody());
System.out.println("event.getBody()-----" + body);
String res = body + ":" + System.currentTimeMillis() + "\r\n";
File file = new File(fileName);
FileOutputStream fos = null;
try {
fos = new FileOutputStream(file, true);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

try {
fos.write(res.getBytes());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
fos.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
txn.commit();
return Status.READY;

} catch (Throwable th) {
txn.rollback();
if (th instanceof Error) {
throw (Error) th;
} else {
throw new EventDeliveryException(th);
}
} finally {
txn.close();
}
}

@Override
public void configure(Context context) {
// TODO Auto-generated method stub
fileName = context.getString(PROP_KEY_ROOTPATH);
}

}