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/*
* 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.flink.runtime.metrics.dump;
import org.apache.flink.util.Preconditions;
/**
* A container for a dumped metric that contains the scope, name and value(s) of the metric.
*/
public abstract class MetricDump {
/** Categories to be returned by {@link MetricDump#getCategory()} to avoid instanceof checks. */
public static final byte METRIC_CATEGORY_COUNTER = 0;
public static final byte METRIC_CATEGORY_GAUGE = 1;
public static final byte METRIC_CATEGORY_HISTOGRAM = 2;
public static final byte METRIC_CATEGORY_METER = 3;
/** The scope information for the stored metric. */
public final QueryScopeInfo scopeInfo;
/** The name of the stored metric. */
public final String name;
private MetricDump(QueryScopeInfo scopeInfo, String name) {
this.scopeInfo = Preconditions.checkNotNull(scopeInfo);
this.name = Preconditions.checkNotNull(name);
}
/**
* Returns the category for this MetricDump.
*
* @return category
*/
public abstract byte getCategory();
@Override
public String toString() {
return "MetricDump{" +
"scopeInfo=" + scopeInfo +
", name='" + name + '\'' +
", category='" + getCategory() + '\'' +
'}';
}
/**
* Container for the value of a {@link org.apache.flink.metrics.Counter}.
*/
public static class CounterDump extends MetricDump {
public final long count;
public CounterDump(QueryScopeInfo scopeInfo, String name, long count) {
super(scopeInfo, name);
this.count = count;
}
@Override
public byte getCategory() {
return METRIC_CATEGORY_COUNTER;
}
}
/**
* Container for the value of a {@link org.apache.flink.metrics.Gauge} as a string.
*/
public static class GaugeDump extends MetricDump {
public final String value;
public GaugeDump(QueryScopeInfo scopeInfo, String name, String value) {
super(scopeInfo, name);
this.value = Preconditions.checkNotNull(value);
}
@Override
public byte getCategory() {
return METRIC_CATEGORY_GAUGE;
}
}
/**
* Container for the values of a {@link org.apache.flink.metrics.Histogram}.
*/
public static class HistogramDump extends MetricDump {
public final long min;
public final long max;
public final double mean;
public final double median;
public final double stddev;
public final double p75;
public final double p90;
public final double p95;
public final double p98;
public final double p99;
public final double p999;
public HistogramDump(QueryScopeInfo scopeInfo, String name,
long min, long max, double mean, double median, double stddev,
double p75, double p90, double p95, double p98, double p99, double p999) {
super(scopeInfo, name);
this.min = min;
this.max = max;
this.mean = mean;
this.median = median;
this.stddev = stddev;
this.p75 = p75;
this.p90 = p90;
this.p95 = p95;
this.p98 = p98;
this.p99 = p99;
this.p999 = p999;
}
@Override
public byte getCategory() {
return METRIC_CATEGORY_HISTOGRAM;
}
}
/**
* Container for the rate of a {@link org.apache.flink.metrics.Meter}.
*/
public static class MeterDump extends MetricDump {
public final double rate;
public MeterDump(QueryScopeInfo scopeInfo, String name, double rate) {
super(scopeInfo, name);
this.rate = rate;
}
@Override
public byte getCategory() {
return METRIC_CATEGORY_METER;
}
}
}