org.apache.cassandra.tools.nodetool.stats.StatsPrinter Maven / Gradle / Ivy
/*
* 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.tools.nodetool.stats;
import java.io.PrintStream;
import org.json.simple.JSONObject;
import org.yaml.snakeyaml.DumperOptions;
import org.yaml.snakeyaml.Yaml;
/**
* Interface for the Stats printer, that'd output statistics
* given the {@code StatsHolder}
*
* @param Stats property bad type
*/
public interface StatsPrinter
{
void print(T data, PrintStream out);
static class JsonPrinter implements StatsPrinter
{
@Override
public void print(T data, PrintStream out)
{
JSONObject json = new JSONObject();
json.putAll(data.convert2Map());
out.println(json.toString());
}
}
static class YamlPrinter implements StatsPrinter
{
@Override
public void print(T data, PrintStream out)
{
DumperOptions options = new DumperOptions();
options.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK);
Yaml yaml = new Yaml(options);
out.println(yaml.dump(data.convert2Map()));
}
}
}