org.springframework.boot.actuate.metrics.writer.WriterUtils.java Source code

Introduction

Here is the source code for org.springframework.boot.actuate.metrics.writer.WriterUtils.java

Source

/*
 * Copyright 2012-2015 the original author or authors.
 *
 * 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.boot.actuate.metrics.writer;

import java.io.Flushable;
import java.lang.reflect.Method;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.boot.actuate.metrics.export.MetricCopyExporter;
import org.springframework.util.ClassUtils;
import org.springframework.util.ReflectionUtils;

/**
 * @author Dave Syer
 */
public class WriterUtils {

    private static final Log logger = LogFactory.getLog(MetricCopyExporter.class);

    public static void flush(MetricWriter writer) {
        if (writer instanceof CompositeMetricWriter) {
            for (MetricWriter element : (CompositeMetricWriter) writer) {
                flush(element);
            }
        }
        try {
            if (ClassUtils.isPresent("java.io.Flushable", null)) {
                if (writer instanceof Flushable) {
                    ((Flushable) writer).flush();
                    return;
                }
            }
            Method method = ReflectionUtils.findMethod(writer.getClass(), "flush");
            if (method != null) {
                ReflectionUtils.invokeMethod(method, writer);
            }
        } catch (Exception e) {
            logger.warn("Could not flush MetricWriter: " + e.getClass() + ": " + e.getMessage());
        }
    }

}