com.ryantenney.metrics.spring.reporter.AbstractScheduledReporterFactoryBean.java Source code

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Here is the source code for com.ryantenney.metrics.spring.reporter.AbstractScheduledReporterFactoryBean.java

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/*
 * Copyright 2012 Ryan W Tenney (http://ryan.10e.us)
 *            and Martello Technologies (http://martellotech.com)
 *
 * 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.ryantenney.metrics.spring.reporter;

import com.codahale.metrics.ScheduledReporter;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.context.SmartLifecycle;

import java.util.concurrent.TimeUnit;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public abstract class AbstractScheduledReporterFactoryBean<T extends ScheduledReporter>
        extends AbstractReporterFactoryBean<T> implements SmartLifecycle, DisposableBean {

    private static final Pattern DURATION_STRING_PATTERN = Pattern.compile("^(\\d+)\\s?(ns|us|ms|s|m|h|d)?$");

    private boolean running;

    @Override
    public void start() {
        if (!isRunning()) {
            getObject().start(getPeriod(), TimeUnit.NANOSECONDS);
            running = true;
        }
    }

    @Override
    public void stop() {
        if (isRunning()) {
            getObject().stop();
            running = true;
        }
    }

    @Override
    public boolean isRunning() {
        return running;
    }

    @Override
    public void destroy() throws Exception {
        stop();
    }

    protected abstract long getPeriod();

    /**
     * Parses and converts to nanoseconds a string representing
     * a duration, ie: 500ms, 30s, 5m, 1h, etc
     * @param duration a string representing a duration
     * @return the duration in nanoseconds
     */
    protected long convertDurationString(String duration) {
        final Matcher m = DURATION_STRING_PATTERN.matcher(duration);
        if (!m.matches()) {
            throw new IllegalArgumentException("Invalid duration string format");
        }

        final long sourceDuration = Long.parseLong(m.group(1));
        final String sourceUnitString = m.group(2);
        final TimeUnit sourceUnit;
        if ("ns".equalsIgnoreCase(sourceUnitString)) {
            sourceUnit = TimeUnit.NANOSECONDS;
        } else if ("us".equalsIgnoreCase(sourceUnitString)) {
            sourceUnit = TimeUnit.MICROSECONDS;
        } else if ("ms".equalsIgnoreCase(sourceUnitString)) {
            sourceUnit = TimeUnit.MILLISECONDS;
        } else if ("s".equalsIgnoreCase(sourceUnitString)) {
            sourceUnit = TimeUnit.SECONDS;
        } else if ("m".equalsIgnoreCase(sourceUnitString)) {
            sourceUnit = TimeUnit.MINUTES;
        } else if ("h".equalsIgnoreCase(sourceUnitString)) {
            sourceUnit = TimeUnit.HOURS;
        } else if ("d".equalsIgnoreCase(sourceUnitString)) {
            sourceUnit = TimeUnit.DAYS;
        } else {
            sourceUnit = TimeUnit.MILLISECONDS;
        }

        return sourceUnit.toNanos(sourceDuration);
    }

    @Override
    public int getPhase() {
        return 0;
    }

    @Override
    public void stop(Runnable callback) {
        stop();
        callback.run();
    }

    @Override
    public boolean isAutoStartup() {
        return true;
    }
}