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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,
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package org.apache.cassandra.tools.nodetool;
import io.airlift.command.Command;
import java.util.List;
import javax.management.openmbean.CompositeData;
import javax.management.openmbean.TabularData;
import org.apache.cassandra.tools.NodeProbe;
import org.apache.cassandra.tools.NodeTool.NodeToolCmd;
@Command(name = "failuredetector", description = "Shows the failure detector information for the cluster")
public class FailureDetectorInfo extends NodeToolCmd
{
@Override
public void execute(NodeProbe probe)
{
TabularData data = probe.getFailureDetectorPhilValues();
System.out.printf("%10s,%16s%n", "Endpoint", "Phi");
for (Object o : data.keySet())
{
@SuppressWarnings({ "rawtypes", "unchecked" })
CompositeData datum = data.get(((List) o).toArray(new Object[((List) o).size()]));
System.out.printf("%10s,%16.8f%n",datum.get("Endpoint"), datum.get("PHI"));
}
}
}