com.opentable.pausedetector.JvmPauseAlarmConfiguration.java Source code

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Here is the source code for com.opentable.pausedetector.JvmPauseAlarmConfiguration.java

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/*
 * 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.opentable.pausedetector;

import java.time.Clock;
import java.time.Duration;
import java.util.Optional;

import javax.inject.Inject;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class JvmPauseAlarmConfiguration {
    /**
     * Turn the pause alarm on or off at config time.
     */
    @Value("${ot.jvm-pause.enabled:true}")
    boolean isPauseAlarmEnabled;

    /**
     * The pause alarm will check this often to see if the JVM was taking a nap.
     * This time should be significantly smaller than the pause time, or you
     * may regret it...
     */
    @Value("${ot.jvm-pause.check-time:PT0.05s}")
    Duration checkTime;

    /**
     * Report pauses that last longer than this amount.
     */
    @Value("${ot.jvm-pause.pause-time:PT0.2s}")
    Duration pauseAlarmTime;

    @Inject
    Optional<Clock> clock;

    @Bean
    public JvmPauseAlarm jvmPauseAlarm() {
        return new JvmPauseAlarm(clock.orElse(Clock.systemUTC())::instant, checkTime.toMillis(),
                pauseAlarmTime.toMillis(), (t) -> {
                });
    }
}