org.apache.hadoop.hdfs.server.namenode.top.TopConf Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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 org.apache.hadoop.hdfs.server.namenode.top;
import java.util.concurrent.TimeUnit;
import com.google.common.primitives.Ints;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import com.google.common.base.Preconditions;
/**
* This class is a common place for NNTop configuration.
*/
@InterfaceAudience.Private
public final class TopConf {
/**
* Whether TopMetrics are enabled
*/
public final boolean isEnabled;
/**
* A meta command representing the total number of calls to all commands
*/
public static final String ALL_CMDS = "*";
/**
* nntop reporting periods in milliseconds
*/
public final int[] nntopReportingPeriodsMs;
public TopConf(Configuration conf) {
isEnabled = conf.getBoolean(DFSConfigKeys.NNTOP_ENABLED_KEY,
DFSConfigKeys.NNTOP_ENABLED_DEFAULT);
String[] periodsStr = conf.getTrimmedStrings(
DFSConfigKeys.NNTOP_WINDOWS_MINUTES_KEY,
DFSConfigKeys.NNTOP_WINDOWS_MINUTES_DEFAULT);
nntopReportingPeriodsMs = new int[periodsStr.length];
for (int i = 0; i < periodsStr.length; i++) {
nntopReportingPeriodsMs[i] = Ints.checkedCast(
TimeUnit.MINUTES.toMillis(Integer.parseInt(periodsStr[i])));
}
for (int aPeriodMs: nntopReportingPeriodsMs) {
Preconditions.checkArgument(aPeriodMs >= TimeUnit.MINUTES.toMillis(1),
"minimum reporting period is 1 min!");
}
}
}