Skip to content
Permalink
Browse files
Add Metrics to instance API
Patch by Alex Petrov; reviewed by Benedict Elliott Smith for CASSANDRA-16136
  • Loading branch information
ifesdjeen committed Dec 3, 2020
1 parent 3d36cd1 commit b466ec8ad6833a898738e94b592646a3e88df52e
Showing 3 changed files with 67 additions and 0 deletions.
@@ -1,3 +1,8 @@
# 0.0.7

CASSANDRA-16136: Add Metrics to instance API
CASSANDRA-16272: Nodetool assert apis do not include the new stdout and stderr in the failure message

# 0.0.6

CASSANDRA-16148: Add IInstance#getReleaseVersionString
@@ -23,6 +23,8 @@
import java.util.UUID;
import java.util.concurrent.Future;

import org.apache.cassandra.distributed.shared.Metrics;

// The cross-version API requires that an Instance has a constructor signature of (IInstanceConfig, ClassLoader)
public interface IInstance extends IIsolatedExecutor
{
@@ -55,6 +57,8 @@ default Object[][] executeInternal(String query, Object... args)

int liveMemberCount();

Metrics metrics();

NodeToolResult nodetoolResult(boolean withNotifications, String... commandAndArgs);

default NodeToolResult nodetoolResult(String... commandAndArgs)
@@ -0,0 +1,58 @@
/*
* 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.cassandra.distributed.shared;

import java.util.List;
import java.util.Map;
import java.util.function.Predicate;

public interface Metrics
{
List<String> getNames();

long getCounter(String name);
Map<String, Long> getCounters(Predicate<String> filter);

double getHistogram(String name, MetricValue value);
Map<String, Double> getHistograms(Predicate<String> filter, MetricValue value);

Object getGauge(String name);
Map<String, Object> getGauges(Predicate<String> filter);

double getMeter(String name, Rate value);
Map<String, Double> getMeters(Predicate<String> filter, Rate value);

double getTimer(String name, MetricValue value);
Map<String, Double> getTimers(Predicate<String> filter, MetricValue value);

enum MetricValue
{
COUNT,
MEDIAN, P75, P95, P98, P99, P999,
MAX, MEAN, MIN, STDDEV
}

enum Rate
{
RATE15_MIN,
RATE5_MIN,
RATE1_MIN,
RATE_MEAN
}
}

0 comments on commit b466ec8

Please sign in to comment.