[exporter] added JSONArrayMeasurementsExporter which generates one JSON array of measurement objects.

This commit is contained in:
Steffen Friedrich 2015-06-09 15:01:15 +02:00
Родитель 076b8024ba
Коммит cbaf24e4e4
3 изменённых файлов: 130 добавлений и 1 удалений

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@ -0,0 +1,73 @@
/**
* Copyright (c) 2015 Yahoo! Inc. All rights reserved.
*
* Licensed 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. See accompanying
* LICENSE file.
*/
package com.yahoo.ycsb.measurements.exporter;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonGenerator;
import org.codehaus.jackson.util.DefaultPrettyPrinter;
/**
* Export measurements into a machine readable JSON Array of measurement objects.
*/
public class JSONArrayMeasurementsExporter implements MeasurementsExporter
{
private JsonFactory factory = new JsonFactory();
private JsonGenerator g;
public JSONArrayMeasurementsExporter(OutputStream os) throws IOException
{
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(os));
g = factory.createJsonGenerator(bw);
g.setPrettyPrinter(new DefaultPrettyPrinter());
g.writeStartArray();
}
public void write(String metric, String measurement, int i) throws IOException
{
g.writeStartObject();
g.writeStringField("metric", metric);
g.writeStringField("measurement", measurement);
g.writeNumberField("value", i);
g.writeEndObject();
}
public void write(String metric, String measurement, double d) throws IOException
{
g.writeStartObject();
g.writeStringField("metric", metric);
g.writeStringField("measurement", measurement);
g.writeNumberField("value", d);
g.writeEndObject();
}
public void close() throws IOException
{
if (g != null)
{
g.writeEndArray();
g.close();
}
}
}

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@ -23,7 +23,7 @@ import java.io.OutputStreamWriter;
import org.codehaus.jackson.JsonFactory; import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonGenerator; import org.codehaus.jackson.JsonGenerator;
import org.codehaus.jackson.impl.DefaultPrettyPrinter; import org.codehaus.jackson.util.DefaultPrettyPrinter;
/** /**
* Export measurements into a machine readable JSON file. * Export measurements into a machine readable JSON file.

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/**
* Copyright (c) 2015 Yahoo! Inc. All rights reserved.
* <p>
* Licensed 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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. See accompanying
* LICENSE file.
*/
package com.yahoo.ycsb.measurements.exporter;
import com.yahoo.ycsb.generator.ZipfianGenerator;
import com.yahoo.ycsb.measurements.Measurements;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.map.ObjectMapper;
import org.testng.annotations.Test;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Properties;
import static org.testng.AssertJUnit.assertEquals;
import static org.testng.AssertJUnit.assertTrue;
public class TestMeasurementsExporter {
@Test
public void testJSONArrayMeasurementsExporter() throws IOException {
Measurements mm = new Measurements(new Properties());
ByteArrayOutputStream out = new ByteArrayOutputStream();
JSONArrayMeasurementsExporter export = new JSONArrayMeasurementsExporter(out);
long min = 5000;
long max = 100000;
ZipfianGenerator zipfian = new ZipfianGenerator(min, max);
for (int i = 0; i < 1000; i++) {
int rnd = zipfian.nextInt();
mm.measure("UPDATE", rnd);
}
mm.exportMeasurements(export);
export.close();
ObjectMapper mapper = new ObjectMapper();
JsonNode json = mapper.readTree(out.toString("UTF-8"));
assertTrue(json.isArray());
assertEquals(json.get(0).get("measurement").asText(), "Operations");
assertEquals(json.get(3).get("measurement").asText(), "MaxLatency(us)");
assertEquals(json.get(11).get("measurement").asText(), "5");
}
}