com.example.common.LibratoMetricWriter.java Source code

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Here is the source code for com.example.common.LibratoMetricWriter.java

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/*
 * 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 com.example.common;

import java.io.Flushable;
import java.io.IOException;
import java.util.concurrent.TimeUnit;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.actuate.metrics.Metric;
import org.springframework.boot.actuate.metrics.writer.Delta;
import org.springframework.boot.actuate.metrics.writer.MetricWriter;

import com.librato.metrics.BatchResult;
import com.librato.metrics.HttpPoster;
import com.librato.metrics.LibratoBatch;
import com.librato.metrics.Sanitizer;

/**
 * @author Dave Syer
 *
 */
public class LibratoMetricWriter implements MetricWriter, Flushable {

    private Logger log = LoggerFactory.getLogger(LibratoMetricWriter.class);

    private LibratoBatch batch;
    private final LibratoProperties librato;
    private final HttpPoster poster;

    public LibratoMetricWriter(HttpPoster poster, LibratoProperties librato) {
        this.poster = poster;
        this.librato = librato;
        this.batch = new LibratoBatch(librato.getBatchSize(), Sanitizer.NO_OP, librato.getTimeoutMillis(),
                TimeUnit.MILLISECONDS, librato.getAgent(), poster);
    }

    @Override
    public void set(Metric<?> value) {
        batch.addGaugeMeasurement(value.getName(), value.getValue());
    }

    @Override
    public void increment(Delta<?> delta) {
        batch.addCounterMeasurement(delta.getName(), delta.getValue().longValue());
    }

    @Override
    public void reset(String metricName) {
        // no-op
    }

    @Override
    public void flush() throws IOException {
        try {
            BatchResult result = batch.post(librato.getSource(), System.currentTimeMillis() / 1000);
            if (!result.success()) {
                log.warn("Could not post {} (out of {}) batches to librato", result.getFailedPosts().size(),
                        result.getPosts().size());
                if (!result.getFailedPosts().isEmpty()) {
                    log.debug("Failed batch: {}", result.getFailedPosts().get(0));
                }
            }
            if (!result.getPosts().isEmpty()) {
                this.batch = new LibratoBatch(librato.getBatchSize(), Sanitizer.NO_OP, librato.getTimeoutMillis(),
                        TimeUnit.MILLISECONDS, librato.getAgent(), poster);
            }
        } catch (

        Exception e)

        {
            log.warn("Cannot post to Librato");
        }
    }

}