org.springframework.cloud.consul.serviceregistry.ConsulServiceRegistry.java Source code

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Here is the source code for org.springframework.cloud.consul.serviceregistry.ConsulServiceRegistry.java

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/*
 * Copyright 2013-2016 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.serviceregistry;

import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.cloud.client.serviceregistry.ServiceRegistry;
import org.springframework.cloud.consul.discovery.ConsulDiscoveryProperties;
import org.springframework.cloud.consul.discovery.HeartbeatProperties;
import org.springframework.cloud.consul.discovery.TtlScheduler;
import org.springframework.util.ReflectionUtils;

import com.ecwid.consul.ConsulException;
import com.ecwid.consul.v1.ConsulClient;
import com.ecwid.consul.v1.QueryParams;
import com.ecwid.consul.v1.Response;
import com.ecwid.consul.v1.health.model.Check;

import static org.springframework.boot.actuate.health.Status.OUT_OF_SERVICE;
import static org.springframework.boot.actuate.health.Status.UP;

/**
 * @author Spencer Gibb
 */
public class ConsulServiceRegistry implements ServiceRegistry<ConsulRegistration> {

    private static Log log = LogFactory.getLog(ConsulServiceRegistry.class);

    private final ConsulClient client;

    private final ConsulDiscoveryProperties properties;

    private final TtlScheduler ttlScheduler;

    private final HeartbeatProperties heartbeatProperties;

    public ConsulServiceRegistry(ConsulClient client, ConsulDiscoveryProperties properties,
            TtlScheduler ttlScheduler, HeartbeatProperties heartbeatProperties) {
        this.client = client;
        this.properties = properties;
        this.ttlScheduler = ttlScheduler;
        this.heartbeatProperties = heartbeatProperties;
    }

    @Override
    public void register(ConsulRegistration reg) {
        log.info("Registering service with consul: " + reg.getService());
        try {
            client.agentServiceRegister(reg.getService(), properties.getAclToken());
            if (heartbeatProperties.isEnabled() && ttlScheduler != null) {
                ttlScheduler.add(reg.getInstanceId());
            }
        } catch (ConsulException e) {
            if (this.properties.isFailFast()) {
                log.error("Error registering service with consul: " + reg.getService(), e);
                ReflectionUtils.rethrowRuntimeException(e);
            }
            log.warn("Failfast is false. Error registering service with consul: " + reg.getService(), e);
        }
    }

    @Override
    public void deregister(ConsulRegistration reg) {
        if (ttlScheduler != null) {
            ttlScheduler.remove(reg.getInstanceId());
        }
        if (log.isInfoEnabled()) {
            log.info("Deregistering service with consul: " + reg.getInstanceId());
        }
        client.agentServiceDeregister(reg.getInstanceId());
    }

    @Override
    public void close() {

    }

    @Override
    public void setStatus(ConsulRegistration registration, String status) {
        if (status.equalsIgnoreCase(OUT_OF_SERVICE.getCode())) {
            client.agentServiceSetMaintenance(registration.getInstanceId(), true);
        } else if (status.equalsIgnoreCase(UP.getCode())) {
            client.agentServiceSetMaintenance(registration.getInstanceId(), false);
        } else {
            throw new IllegalArgumentException("Unknown status: " + status);
        }

    }

    @Override
    public Object getStatus(ConsulRegistration registration) {
        String serviceId = registration.getServiceId();
        Response<List<Check>> response = client.getHealthChecksForService(serviceId, QueryParams.DEFAULT);
        List<Check> checks = response.getValue();

        for (Check check : checks) {
            if (check.getServiceId().equals(registration.getInstanceId())) {
                if (check.getName().equalsIgnoreCase("Service Maintenance Mode")) {
                    return OUT_OF_SERVICE.getCode();
                }
            }
        }

        return UP.getCode();
    }
}