| /** |
| * 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!"); |
| } |
| } |
| } |