| /** |
| * 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.metrics2.impl; |
| |
| import java.util.List; |
| |
| import static com.google.common.base.Preconditions.*; |
| |
| import org.apache.hadoop.metrics2.MetricsInfo; |
| import org.apache.hadoop.metrics2.AbstractMetric; |
| import org.apache.hadoop.metrics2.MetricsTag; |
| import static org.apache.hadoop.metrics2.util.Contracts.*; |
| |
| class MetricsRecordImpl extends AbstractMetricsRecord { |
| protected static final String DEFAULT_CONTEXT = "default"; |
| |
| private final long timestamp; |
| private final MetricsInfo info; |
| private final List<MetricsTag> tags; |
| private final Iterable<AbstractMetric> metrics; |
| |
| /** |
| * Construct a metrics record |
| * @param info {@link MetricInfo} of the record |
| * @param timestamp of the record |
| * @param tags of the record |
| * @param metrics of the record |
| */ |
| public MetricsRecordImpl(MetricsInfo info, long timestamp, |
| List<MetricsTag> tags, |
| Iterable<AbstractMetric> metrics) { |
| this.timestamp = checkArg(timestamp, timestamp > 0, "timestamp"); |
| this.info = checkNotNull(info, "info"); |
| this.tags = checkNotNull(tags, "tags"); |
| this.metrics = checkNotNull(metrics, "metrics"); |
| } |
| |
| @Override public long timestamp() { |
| return timestamp; |
| } |
| |
| @Override public String name() { |
| return info.name(); |
| } |
| |
| MetricsInfo info() { |
| return info; |
| } |
| |
| @Override public String description() { |
| return info.description(); |
| } |
| |
| @Override public String context() { |
| // usually the first tag |
| for (MetricsTag t : tags) { |
| if (t.info() == MsInfo.Context) { |
| return t.value(); |
| } |
| } |
| return DEFAULT_CONTEXT; |
| } |
| |
| @Override |
| public List<MetricsTag> tags() { |
| return tags; // already unmodifiable from MetricsRecordBuilderImpl#tags |
| } |
| |
| @Override public Iterable<AbstractMetric> metrics() { |
| return metrics; |
| } |
| } |