com.ning.billing.meter.timeline.consumer.CSVSampleProcessor Maven / Gradle / Ivy
/*
* Copyright 2010-2012 Ning, Inc.
*
* Ning 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 com.ning.billing.meter.timeline.consumer;
import org.joda.time.DateTime;
import com.ning.billing.meter.timeline.samples.SampleOpcode;
import com.ning.billing.meter.timeline.util.DateTimeUtils;
public class CSVSampleProcessor extends TimeRangeSampleProcessor {
private final StringBuilder builder = new StringBuilder();
// Use our private counter because of the decimating filter
private int builderSampleNumber = 0;
public CSVSampleProcessor() { }
public CSVSampleProcessor(final DateTime startTime, final DateTime endTime) {
super(startTime, endTime);
}
@Override
public void processOneSample(final DateTime time, final SampleOpcode opcode, final Object value) {
final String valueString = value == null ? "0" : value.toString();
if (builderSampleNumber > 0) {
builder.append(",");
}
builder.append(DateTimeUtils.unixSeconds(time))
.append(",")
.append(valueString);
builderSampleNumber++;
}
@Override
public synchronized String toString() {
final String value = builder.toString();
// Allow for re-use
builder.setLength(0);
builderSampleNumber = 0;
return value;
}
}