/
EurekaServiceRegistry.java
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/
EurekaServiceRegistry.java
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/*
* Copyright 2013-2024 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
*
* https://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.netflix.eureka.serviceregistry;
import java.util.HashMap;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import com.netflix.appinfo.InstanceInfo;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.cloud.client.serviceregistry.ServiceRegistry;
import org.springframework.cloud.netflix.eureka.EurekaInstanceConfigBean;
import static com.netflix.appinfo.InstanceInfo.InstanceStatus.UNKNOWN;
/**
* @author Spencer Gibb
* @author Robert Bleyl
*/
public class EurekaServiceRegistry implements ServiceRegistry<EurekaRegistration> {
private static final Log log = LogFactory.getLog(EurekaServiceRegistry.class);
private EurekaInstanceConfigBean eurekaInstanceConfigBean;
public EurekaServiceRegistry() {
}
public EurekaServiceRegistry(EurekaInstanceConfigBean eurekaInstanceConfigBean) {
this.eurekaInstanceConfigBean = eurekaInstanceConfigBean;
}
@Override
public void register(EurekaRegistration reg) {
if (eurekaInstanceConfigBean != null && eurekaInstanceConfigBean.isAsyncClientInitialization()) {
if (log.isDebugEnabled()) {
log.debug("Initializing client asynchronously...");
}
ExecutorService executorService = Executors.newSingleThreadExecutor();
executorService.submit(() -> {
maybeInitializeClient(reg);
if (log.isDebugEnabled()) {
log.debug("Asynchronous client initialization done.");
}
});
}
else {
maybeInitializeClient(reg);
}
if (log.isInfoEnabled()) {
log.info("Registering application " + reg.getApplicationInfoManager().getInfo().getAppName()
+ " with eureka with status " + reg.getInstanceConfig().getInitialStatus());
}
reg.getApplicationInfoManager().setInstanceStatus(reg.getInstanceConfig().getInitialStatus());
reg.getHealthCheckHandler()
.ifAvailable(healthCheckHandler -> reg.getEurekaClient().registerHealthCheck(healthCheckHandler));
}
private void maybeInitializeClient(EurekaRegistration reg) {
// force initialization of possibly scoped proxies
reg.getApplicationInfoManager().getInfo();
reg.getEurekaClient().getApplications();
}
@Override
public void deregister(EurekaRegistration reg) {
if (reg.getApplicationInfoManager().getInfo() != null) {
if (log.isInfoEnabled()) {
log.info("Unregistering application " + reg.getApplicationInfoManager().getInfo().getAppName()
+ " with eureka with status DOWN");
}
reg.getApplicationInfoManager().setInstanceStatus(InstanceInfo.InstanceStatus.DOWN);
// shutdown of eureka client should happen with EurekaRegistration.close()
// auto registration will create a bean which will be properly disposed
// manual registrations will need to call close()
}
}
@Override
public void setStatus(EurekaRegistration registration, String status) {
InstanceInfo info = registration.getApplicationInfoManager().getInfo();
// TODO: howto deal with delete properly?
if ("CANCEL_OVERRIDE".equalsIgnoreCase(status)) {
registration.getEurekaClient().cancelOverrideStatus(info);
return;
}
// TODO: howto deal with status types across discovery systems?
InstanceInfo.InstanceStatus newStatus = InstanceInfo.InstanceStatus.toEnum(status);
registration.getEurekaClient().setStatus(newStatus, info);
}
@SuppressWarnings("unchecked")
@Override
public Object getStatus(EurekaRegistration registration) {
String appname = registration.getApplicationInfoManager().getInfo().getAppName();
String instanceId = registration.getApplicationInfoManager().getInfo().getId();
InstanceInfo info = registration.getEurekaClient().getInstanceInfo(appname, instanceId);
HashMap<String, Object> status = new HashMap<>();
if (info != null) {
status.put("status", info.getStatus().toString());
status.put("overriddenStatus", info.getOverriddenStatus().toString());
}
else {
status.put("status", UNKNOWN.toString());
}
return status;
}
public void close() {
}
}