/**
* Copyright 2017 Pivotal Software, Inc.
*
* 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 org.springframework.metrics.instrument.binder;
import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.Logger;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.turbo.TurboFilter;
import ch.qos.logback.core.spi.FilterReply;
import org.slf4j.LoggerFactory;
import org.slf4j.Marker;
import org.springframework.metrics.instrument.Counter;
import org.springframework.metrics.instrument.MeterRegistry;
import java.util.HashMap;
import java.util.Map;
public class LogbackMetrics implements MeterBinder {
@Override
public void bindTo(MeterRegistry registry) {
LoggerContext context = (LoggerContext) LoggerFactory.getILoggerFactory();
context.addTurboFilter(new MetricsTurboFilter(registry));
}
}
class MetricsTurboFilter extends TurboFilter {
private final Counter errorCounter;
private final Counter warnCounter;
private final Counter infoCounter;
private final Counter debugCounter;
private final Counter traceCounter;
MetricsTurboFilter(MeterRegistry registry) {
errorCounter = registry.counter("logback_events", "level", "error");
warnCounter = registry.counter("logback_events", "level", "warn");
infoCounter = registry.counter("logback_events", "level", "info");
debugCounter = registry.counter("logback_events", "level", "debug");
traceCounter = registry.counter("logback_events", "level", "trace");
}
@Override
public FilterReply decide(Marker marker, Logger logger, Level level, String format, Object[] params, Throwable t) {
switch(level.toInt()) {
case Level.ERROR_INT:
errorCounter.increment();
break;
case Level.WARN_INT:
warnCounter.increment();
break;
case Level.INFO_INT:
infoCounter.increment();
break;
case Level.DEBUG_INT:
debugCounter.increment();
break;
case Level.TRACE_INT:
traceCounter.increment();
break;
}
return FilterReply.ACCEPT;
}
}