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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.
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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
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* Unless required by applicable law or agreed to in writing, software
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package org.apache.cassandra.service.reads.thresholds;
import java.util.AbstractMap;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import io.netty.util.concurrent.FastThreadLocal;
import org.apache.cassandra.db.ColumnFamilyStore;
import org.apache.cassandra.db.ReadCommand;
import org.apache.cassandra.metrics.TableMetrics;
import org.apache.cassandra.schema.Schema;
import org.apache.cassandra.service.ClientWarn;
import static org.apache.cassandra.config.CassandraRelevantProperties.READS_THRESHOLDS_COORDINATOR_DEFENSIVE_CHECKS_ENABLED;
public class CoordinatorWarnings
{
private static final Logger logger = LoggerFactory.getLogger(CoordinatorWarnings.class);
private static final boolean ENABLE_DEFENSIVE_CHECKS = READS_THRESHOLDS_COORDINATOR_DEFENSIVE_CHECKS_ENABLED.getBoolean();
// when .init() is called set the STATE to be INIT; this is to lazy allocate the map only when warnings are generated
private static final Map INIT = Collections.emptyMap();
private static final FastThreadLocal