io.druid.indexing.common.tasklogs.TaskRunnerTaskLogStreamer Maven / Gradle / Ivy
/*
* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package io.druid.indexing.common.tasklogs;
import com.google.common.base.Optional;
import com.google.common.io.ByteSource;
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;
/**
*/
public class TaskRunnerTaskLogStreamer implements TaskLogStreamer
{
private final TaskMaster taskMaster;
@Inject
public TaskRunnerTaskLogStreamer(final TaskMaster taskMaster)
{
this.taskMaster = taskMaster;
}
@Override
public Optional 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();
}
}
}