/*
* Druid - a distributed column store.
* Copyright (C) 2012, 2013 Metamarkets Group Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package io.druid.server.log;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.base.Charsets;
import com.google.common.base.Throwables;
import com.metamx.common.concurrent.ScheduledExecutors;
import com.metamx.common.guava.CloseQuietly;
import com.metamx.common.lifecycle.LifecycleStart;
import com.metamx.common.lifecycle.LifecycleStop;
import io.druid.server.RequestLogLine;
import org.joda.time.DateTime;
import org.joda.time.Duration;
import org.joda.time.MutableDateTime;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.util.concurrent.Callable;
import java.util.concurrent.ScheduledExecutorService;
/**
*/
public class FileRequestLogger implements RequestLogger
{
private final ObjectMapper objectMapper;
private final ScheduledExecutorService exec;
private final File baseDir;
private final Object lock = new Object();
private volatile DateTime currentDay;
private volatile OutputStreamWriter fileWriter;
public FileRequestLogger(ObjectMapper objectMapper, ScheduledExecutorService exec, File baseDir)
{
this.exec = exec;
this.objectMapper = objectMapper;
this.baseDir = baseDir;
}
@LifecycleStart
public void start()
{
try {
baseDir.mkdirs();
MutableDateTime mutableDateTime = new DateTime().toMutableDateTime();
mutableDateTime.setMillisOfDay(0);
currentDay = mutableDateTime.toDateTime();
fileWriter = new OutputStreamWriter(
new FileOutputStream(new File(baseDir, currentDay.toString("yyyy-MM-dd'.log'")), true),
Charsets.UTF_8
);
long nextDay = currentDay.plusDays(1).getMillis();
Duration delay = new Duration(nextDay - new DateTime().getMillis());
ScheduledExecutors.scheduleWithFixedDelay(
exec,
delay,
Duration.standardDays(1),
new Callable<ScheduledExecutors.Signal>()
{
@Override
public ScheduledExecutors.Signal call()
{
currentDay = currentDay.plusDays(1);
try {
synchronized (lock) {
CloseQuietly.close(fileWriter);
fileWriter = new OutputStreamWriter(
new FileOutputStream(new File(baseDir, currentDay.toString()), true),
Charsets.UTF_8
);
}
}
catch (Exception e) {
Throwables.propagate(e);
}
return ScheduledExecutors.Signal.REPEAT;
}
}
);
}
catch (IOException e) {
Throwables.propagate(e);
}
}
@LifecycleStop
public void stop()
{
synchronized (lock) {
CloseQuietly.close(fileWriter);
}
}
@Override
public void log(RequestLogLine requestLogLine) throws IOException
{
synchronized (lock) {
fileWriter.write(
String.format("%s%n", requestLogLine.getLine(objectMapper))
);
fileWriter.flush();
}
}
}