зеркало из https://github.com/Azure/YCSB.git
[exporter] added JSONArrayMeasurementsExporter which generates one JSON array of measurement objects.
This commit is contained in:
Steffen Friedrich
Родитель
076b8024ba
Коммит
cbaf24e4e4
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/**
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* Copyright (c) 2015 Yahoo! Inc. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you
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* may not use this file except in compliance with the License. You
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* may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* permissions and limitations under the License. See accompanying
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* LICENSE file.
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*/
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package com.yahoo.ycsb.measurements.exporter;
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import java.io.BufferedWriter;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.io.OutputStreamWriter;
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import org.codehaus.jackson.JsonFactory;
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import org.codehaus.jackson.JsonGenerator;
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import org.codehaus.jackson.util.DefaultPrettyPrinter;
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/**
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* Export measurements into a machine readable JSON Array of measurement objects.
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*/
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public class JSONArrayMeasurementsExporter implements MeasurementsExporter
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{
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private JsonFactory factory = new JsonFactory();
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private JsonGenerator g;
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public JSONArrayMeasurementsExporter(OutputStream os) throws IOException
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{
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BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(os));
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g = factory.createJsonGenerator(bw);
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g.setPrettyPrinter(new DefaultPrettyPrinter());
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g.writeStartArray();
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}
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public void write(String metric, String measurement, int i) throws IOException
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{
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g.writeStartObject();
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g.writeStringField("metric", metric);
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g.writeStringField("measurement", measurement);
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g.writeNumberField("value", i);
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g.writeEndObject();
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}
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public void write(String metric, String measurement, double d) throws IOException
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{
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g.writeStartObject();
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g.writeStringField("metric", metric);
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g.writeStringField("measurement", measurement);
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g.writeNumberField("value", d);
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g.writeEndObject();
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}
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public void close() throws IOException
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{
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if (g != null)
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{
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g.writeEndArray();
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g.close();
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}
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}
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}
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@ -23,7 +23,7 @@ import java.io.OutputStreamWriter;
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import org.codehaus.jackson.JsonFactory;
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import org.codehaus.jackson.JsonGenerator;
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import org.codehaus.jackson.impl.DefaultPrettyPrinter;
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import org.codehaus.jackson.util.DefaultPrettyPrinter;
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/**
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* Export measurements into a machine readable JSON file.
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@ -0,0 +1,56 @@
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/**
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* Copyright (c) 2015 Yahoo! Inc. All rights reserved.
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* <p>
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* Licensed under the Apache License, Version 2.0 (the "License"); you
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* may not use this file except in compliance with the License. You
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* may obtain a copy of the License at
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* <p>
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* http://www.apache.org/licenses/LICENSE-2.0
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* <p>
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* permissions and limitations under the License. See accompanying
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* LICENSE file.
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*/
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package com.yahoo.ycsb.measurements.exporter;
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import com.yahoo.ycsb.generator.ZipfianGenerator;
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import com.yahoo.ycsb.measurements.Measurements;
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import org.codehaus.jackson.JsonNode;
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import org.codehaus.jackson.map.ObjectMapper;
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import org.testng.annotations.Test;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.util.Properties;
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import static org.testng.AssertJUnit.assertEquals;
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import static org.testng.AssertJUnit.assertTrue;
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public class TestMeasurementsExporter {
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@Test
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public void testJSONArrayMeasurementsExporter() throws IOException {
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Measurements mm = new Measurements(new Properties());
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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JSONArrayMeasurementsExporter export = new JSONArrayMeasurementsExporter(out);
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long min = 5000;
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long max = 100000;
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ZipfianGenerator zipfian = new ZipfianGenerator(min, max);
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for (int i = 0; i < 1000; i++) {
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int rnd = zipfian.nextInt();
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mm.measure("UPDATE", rnd);
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}
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mm.exportMeasurements(export);
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export.close();
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ObjectMapper mapper = new ObjectMapper();
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JsonNode json = mapper.readTree(out.toString("UTF-8"));
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assertTrue(json.isArray());
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assertEquals(json.get(0).get("measurement").asText(), "Operations");
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assertEquals(json.get(3).get("measurement").asText(), "MaxLatency(us)");
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assertEquals(json.get(11).get("measurement").asText(), "5");
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}
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}
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