/*
* 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.indexing.common.tasklogs;
import com.google.common.base.Optional;
import com.google.common.io.InputSupplier;
import com.google.inject.Inject;
import io.druid.indexing.overlord.TaskMaster;
import io.druid.indexing.overlord.TaskRunner;
import io.druid.tasklogs.TaskLogStreamer;
import java.io.IOException;
import java.io.InputStream;
/**
*/
public class TaskRunnerTaskLogStreamer implements TaskLogStreamer
{
private final TaskMaster taskMaster;
@Inject
public TaskRunnerTaskLogStreamer(
final TaskMaster taskMaster
) {
this.taskMaster = taskMaster;
}
@Override
public Optional<InputSupplier<InputStream>> streamTaskLog(String taskid, long offset) throws IOException
{
final TaskRunner runner = taskMaster.getTaskRunner().orNull();
if (runner instanceof TaskLogStreamer) {
return ((TaskLogStreamer) runner).streamTaskLog(taskid, offset);
} else {
return Optional.absent();
}
}
}