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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* 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.metrics;
import java.util.EnumMap;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Maps;
import com.codahale.metrics.Meter;
import com.codahale.metrics.Timer;
import org.apache.cassandra.net.Verb;
import static org.apache.cassandra.metrics.CassandraMetricsRegistry.Metrics;
import static org.apache.cassandra.metrics.DefaultNameFactory.createMetricName;
/**
* Metrics for dropped messages by verb.
*/
public class DroppedMessageMetrics
{
private static final String TYPE = "DroppedMessage";
// backward compatibility for request metrics which names have changed in 4.0 as part of CASSANDRA-15066
private static final ImmutableMap REQUEST_VERB_ALIAS;
static
{
EnumMap aliases = new EnumMap<>(Verb.class);
aliases.put(Verb.BATCH_REMOVE_REQ, "BATCH_REMOVE");
aliases.put(Verb.BATCH_STORE_REQ, "BATCH_STORE");
aliases.put(Verb.COUNTER_MUTATION_REQ, "COUNTER_MUTATION");
aliases.put(Verb.HINT_REQ, "HINT");
aliases.put(Verb.MUTATION_REQ, "MUTATION");
aliases.put(Verb.RANGE_REQ, "RANGE_SLICE");
aliases.put(Verb.READ_REQ, "READ");
aliases.put(Verb.READ_REPAIR_REQ, "READ_REPAIR");
aliases.put(Verb.REQUEST_RSP, "REQUEST_RESPONSE");
REQUEST_VERB_ALIAS = Maps.immutableEnumMap(aliases);
}
/** Number of dropped messages */
public final Meter dropped;
/** The dropped latency within node */
public final Timer internalDroppedLatency;
/** The cross node dropped latency */
public final Timer crossNodeDroppedLatency;
public DroppedMessageMetrics(Verb verb)
{
String scope = verb.toString();
if (REQUEST_VERB_ALIAS.containsKey(verb))
{
String alias = REQUEST_VERB_ALIAS.get(verb);
dropped = Metrics.meter(createMetricName(TYPE, "Dropped", scope),
createMetricName(TYPE, "Dropped", alias));
internalDroppedLatency = Metrics.timer(createMetricName(TYPE, "InternalDroppedLatency", scope),
createMetricName(TYPE, "InternalDroppedLatency", alias));
crossNodeDroppedLatency = Metrics.timer(createMetricName(TYPE, "CrossNodeDroppedLatency", scope),
createMetricName(TYPE, "CrossNodeDroppedLatency", alias));
}
else
{
dropped = Metrics.meter(createMetricName(TYPE, "Dropped", scope));
internalDroppedLatency = Metrics.timer(createMetricName(TYPE, "InternalDroppedLatency", scope));
crossNodeDroppedLatency = Metrics.timer(createMetricName(TYPE, "CrossNodeDroppedLatency", scope));
}
}
}