io.engineblock.extensions.csvmetrics.CSVMetricsPlugin Maven / Gradle / Ivy
/*
*
* Copyright 2016 jshook
* 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.
* /
*/
package io.engineblock.extensions.csvmetrics;
import com.codahale.metrics.MetricRegistry;
import org.slf4j.Logger;
import javax.script.ScriptContext;
import java.io.IOException;
public class CSVMetricsPlugin {
private final ScriptContext context;
private final Logger logger;
private final MetricRegistry metricRegistry;
public CSVMetricsPlugin(Logger logger, MetricRegistry metricRegistry, ScriptContext scriptContext) {
this.logger = logger;
this.metricRegistry = metricRegistry;
this.context = scriptContext;
}
/**
* Create a new CSV metrics logger, without starting it.
* @param filename The file to write CSV metrics data to
* @return the CSVMetrics instance, for method chaining
*/
public CSVMetrics log(String filename) {
CSVMetrics csvMetrics = new CSVMetrics(filename, logger, metricRegistry);
writeStdout("started new csvlogger: " + filename + "\n");
return csvMetrics;
}
/**
* Create a new CSV metrics logger, configure it with a regex filter pattern, and start it.
* @param filename the file to write CSV metrics data to
* @param period The time period to write at
* @param timeUnit A time unit for the time period, from NANOSECONDS, MICROSECONDS, MILLISECONDS, SECONDS, MINUTES
* @param pattern Zero or more patterns to use for filtering metric names
* @return the CSVMetrics instance, for method chaining
*/
public CSVMetrics start(String filename, long period, String timeUnit, String... pattern) {
CSVMetrics log = log(filename);
for(String p:pattern) {
log.addPattern(p);
}
return log.start(period, timeUnit);
}
private void writeStdout(String msg) {
try {
context.getWriter().write(msg);
} catch (IOException e) {
logger.error(e.getMessage());
throw new RuntimeException(e);
}
}
}