org.springframework.cloud.consul.discovery.TtlScheduler.java Source code

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Here is the source code for org.springframework.cloud.consul.discovery.TtlScheduler.java

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/*
 * Copyright 2013-2015 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.cloud.consul.discovery;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import lombok.extern.slf4j.Slf4j;

import org.joda.time.DateTime;
import org.springframework.scheduling.annotation.Scheduled;

import com.ecwid.consul.v1.ConsulClient;
import com.ecwid.consul.v1.agent.model.NewService;

/**
 * Created by nicu on 11.03.2015.
 */
@Slf4j
public class TtlScheduler {

    public static final DateTime EXPIRED_DATE = new DateTime(0);
    private final Map<String, DateTime> serviceHeartbeats = new ConcurrentHashMap<>();

    private HeartbeatProperties configuration;

    private ConsulClient client;

    public TtlScheduler(HeartbeatProperties configuration, ConsulClient client) {
        this.configuration = configuration;
        this.client = client;
    }

    /**
     * Add a service to the checks loop.
     */
    public void add(final NewService service) {
        serviceHeartbeats.put(service.getId(), EXPIRED_DATE);
    }

    public void remove(String serviceId) {
        serviceHeartbeats.remove(serviceId);
    }

    @Scheduled(initialDelay = 0, fixedRateString = "${spring.cloud.consul.discovery.heartbeat.fixedRate:15000}")
    private void heartbeatServices() {
        for (String serviceId : serviceHeartbeats.keySet()) {
            DateTime latestHeartbeatDoneForService = serviceHeartbeats.get(serviceId);
            if (latestHeartbeatDoneForService.plus(configuration.getHeartbeatInterval()).isBefore(DateTime.now())) {
                String checkId = serviceId;
                if (!checkId.startsWith("service:")) {
                    checkId = "service:" + checkId;
                }
                client.agentCheckPass(checkId);
                log.debug("Sending consul heartbeat for: " + serviceId);
                serviceHeartbeats.put(serviceId, DateTime.now());
            }
        }
    }
}