scylla-jmx/src/main/java/org/apache/cassandra/metrics/CompactionMetrics.java

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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.
*/
/*
* Copyright 2015 Cloudius Systems
*
* Modified by Cloudius Systems
*/
package org.apache.cassandra.metrics;
import java.util.HashMap;
import java.util.Map;
import javax.json.JsonArray;
import javax.json.JsonObject;
import javax.management.MalformedObjectNameException;
/**
* Metrics for compaction.
*/
public class CompactionMetrics implements Metrics {
public CompactionMetrics() {
}
@Override
public void register(MetricsRegistry registry) throws MalformedObjectNameException {
MetricNameFactory factory = new DefaultNameFactory("Compaction");
/** Estimated number of compactions remaining to perform */
registry.register(() -> registry.gauge(Integer.class, "/compaction_manager/metrics/pending_tasks"),
factory.createMetricName("PendingTasks"));
/** Number of completed compactions since server [re]start */
registry.register(() -> registry.gauge("/compaction_manager/metrics/completed_tasks"),
factory.createMetricName("CompletedTasks"));
/** Total number of compactions since server [re]start */
registry.register(() -> registry.meter("/compaction_manager/metrics/total_compactions_completed"),
factory.createMetricName("TotalCompactionsCompleted"));
/** Total number of bytes compacted since server [re]start */
registry.register(() -> registry.meter("/compaction_manager/metrics/bytes_compacted"),
factory.createMetricName("BytesCompacted"));
registry.register(() -> registry.gauge((client) -> {
Map<String, Map<String, Integer>> result = new HashMap<>();
JsonArray compactions = client.getJsonArray("compaction_manager/compactions");
for (int i = 0; i < compactions.size(); i++) {
JsonObject c = compactions.getJsonObject(i);
String ks = c.getString("ks");
String cf = c.getString("cf");
if (!result.containsKey(ks)) {
result.put(ks, new HashMap<>());
}
Map<String, Integer> map = result.get(ks);
map.put(cf, (int)(c.getJsonNumber("total").longValue() - c.getJsonNumber("completed").longValue()));
}
return result;
}), factory.createMetricName("PendingTasksByTableName"));
}
}