/* * Copyright 2015 emetriq GmbH * * 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 com.criteo.kafka; import java.util.NoSuchElementException; import com.yammer.metrics.core.Counter; import com.yammer.metrics.core.Gauge; import com.yammer.metrics.core.Histogram; import com.yammer.metrics.core.Metered; import com.yammer.metrics.core.MetricName; import com.yammer.metrics.core.MetricProcessor; import com.yammer.metrics.core.Timer; /** * Tries to get the value of a {@code Gauge} and wraps any {@code NoSuchElementException} * into an {@code InvalidGaugeException}. * * Reason for this is https://issues.apache.org/jira/browse/KAFKA-1866 */ public class ValidatingMetricProcessor implements MetricProcessor { @Override public void processMeter(MetricName name, Metered meter, Object context) throws Exception { } @Override public void processCounter(MetricName name, Counter counter, Object context) throws Exception { } @Override public void processHistogram(MetricName name, Histogram histogram, Object context) throws Exception { } @Override public void processTimer(MetricName name, Timer timer, Object context) throws Exception { } @Override public void processGauge(MetricName name, Gauge gauge, Object context) throws Exception { try { gauge.value(); } catch (NoSuchElementException ex) { throw new InvalidGaugeException(String.format("%s.%s.%s", name.getGroup(), name.getType(), name.getName()), ex); } } }