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publish eureka instance events

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This commit is contained in:
Spencer Gibb
2014-08-12 00:56:27 -06:00
parent 11d9ddbf85
commit c8be52b025
8 changed files with 162 additions and 31 deletions
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52
spring-platform-netflix-core/src/main/java/org/springframework/platform/netflix/eureka/EurekaServerAutoConfiguration.java
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@@ -18,14 +18,24 @@ package org.springframework.platform.netflix.eureka;
import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import com.netflix.eureka.PeerAwareInstanceRegistry;
import com.netflix.eureka.lease.LeaseManager;
import org.springframework.aop.framework.ProxyFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationListener;
import org.springframework.context.SmartLifecycle;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.Ordered;
import org.springframework.platform.netflix.eureka.advice.PiggybackMethodInterceptor;
import org.springframework.platform.netflix.eureka.event.EurekaRegistryAvailableEvent;
import org.springframework.platform.netflix.eureka.event.EurekaServerStartedEvent;
import org.springframework.platform.netflix.eureka.event.LeaseManagerMessageBroker;
import org.springframework.util.ReflectionUtils;
import org.springframework.web.context.ServletContextAware;
import com.netflix.blitz4j.LoggingConfiguration;
@@ -33,6 +43,9 @@ import com.netflix.eureka.EurekaBootStrap;
import com.netflix.eureka.EurekaServerConfig;
import com.netflix.eureka.EurekaServerConfigurationManager;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
/**
* @author Dave Syer
*
@@ -112,5 +125,42 @@ public class EurekaServerAutoConfiguration implements ServletContextAware,
public int getOrder() {
return order;
}
@Configuration
@ConditionalOnClass(PeerAwareInstanceRegistry.class)
protected static class Initializer implements
ApplicationListener<EurekaRegistryAvailableEvent> {
@Autowired
private ApplicationContext applicationContext;
@Bean
public LeaseManagerMessageBroker leaseManagerMessageBroker() {
return new LeaseManagerMessageBroker();
}
@Override
public void onApplicationEvent(EurekaRegistryAvailableEvent event) {
//wrap the instance registry...
ProxyFactory factory = new ProxyFactory(PeerAwareInstanceRegistry.getInstance());
//...with the LeaseManagerMessageBroker
factory.addAdvice(new PiggybackMethodInterceptor(leaseManagerMessageBroker(), LeaseManager.class));
factory.setProxyTargetClass(true);
//Now replace the PeerAwareInstanceRegistry with our wrapped version
Field field = ReflectionUtils.findField(PeerAwareInstanceRegistry.class, "instance");
try {
// Awful ugly hack to work around lack of DI in eureka
field.setAccessible(true);
Field modifiersField = Field.class.getDeclaredField("modifiers");
modifiersField.setAccessible(true);
modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
ReflectionUtils.setField(field, null, factory.getProxy());
}
catch (Exception e) {
throw new IllegalStateException("Cannot modify instance registry", e);
}
}
}
}

28
spring-platform-netflix-core/src/main/java/org/springframework/platform/netflix/eureka/advice/LeaseManagerLite.java
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@@ -1,28 +0,0 @@
/*
* Copyright 2013-2014 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.platform.netflix.eureka.advice;
import com.netflix.appinfo.InstanceInfo;
/**
* @author Dave Syer
*
*/
public interface LeaseManagerLite {
void register(final InstanceInfo info, final boolean isReplication);
}

21
spring-platform-netflix-core/src/main/java/org/springframework/platform/netflix/eureka/event/EurekaInstanceCanceledEvent.java Normal file
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@@ -0,0 +1,21 @@
package org.springframework.platform.netflix.eureka.event;
import lombok.Data;
import org.springframework.context.ApplicationEvent;
/**
* @author Spencer Gibb
*/
@Data
public class EurekaInstanceCanceledEvent extends ApplicationEvent {
private String appName;
private String serverId;
boolean replication;
public EurekaInstanceCanceledEvent(Object source, String appName, String serverId, boolean replication) {
super(source);
this.appName = appName;
this.serverId = serverId;
this.replication = replication;
}
}

23
spring-platform-netflix-core/src/main/java/org/springframework/platform/netflix/eureka/event/EurekaInstanceRegisteredEvent.java Normal file
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@@ -0,0 +1,23 @@
package org.springframework.platform.netflix.eureka.event;
import lombok.Data;
import org.springframework.context.ApplicationEvent;
/**
* @author Spencer Gibb
*/
@Data
public class EurekaInstanceRegisteredEvent extends ApplicationEvent {
private String appName;
private String vip;
private int leaseDuration;
boolean replication;
public EurekaInstanceRegisteredEvent(Object source, String appName, String vip, int leaseDuration, boolean replication) {
super(source);
this.appName = appName;
this.vip = vip;
this.leaseDuration = leaseDuration;
this.replication = replication;
}
}

21
spring-platform-netflix-core/src/main/java/org/springframework/platform/netflix/eureka/event/EurekaInstanceRenewedEvent.java Normal file
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@@ -0,0 +1,21 @@
package org.springframework.platform.netflix.eureka.event;
import lombok.Data;
import org.springframework.context.ApplicationEvent;
/**
* @author Spencer Gibb
*/
@Data
public class EurekaInstanceRenewedEvent extends ApplicationEvent {
private String appName;
private String serverId;
boolean replication;
public EurekaInstanceRenewedEvent(Object source, String appName, String serverId, boolean replication) {
super(source);
this.appName = appName;
this.serverId = serverId;
this.replication = replication;
}
}

2
spring-platform-netflix-core/src/main/java/org/springframework/platform/netflix/eureka/EurekaRegistryAvailableEvent.java → spring-platform-netflix-core/src/main/java/org/springframework/platform/netflix/eureka/event/EurekaRegistryAvailableEvent.java
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@@ -13,7 +13,7 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.platform.netflix.eureka;
package org.springframework.platform.netflix.eureka.event;
import org.springframework.context.ApplicationEvent;

2
spring-platform-netflix-core/src/main/java/org/springframework/platform/netflix/eureka/EurekaServerStartedEvent.java → spring-platform-netflix-core/src/main/java/org/springframework/platform/netflix/eureka/event/EurekaServerStartedEvent.java
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@@ -13,7 +13,7 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.platform.netflix.eureka;
package org.springframework.platform.netflix.eureka.event;
import org.springframework.context.ApplicationEvent;

44
spring-platform-netflix-core/src/main/java/org/springframework/platform/netflix/eureka/event/LeaseManagerMessageBroker.java Normal file
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@@ -0,0 +1,44 @@
package org.springframework.platform.netflix.eureka.event;
import com.netflix.appinfo.InstanceInfo;
import com.netflix.eureka.lease.LeaseManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
/**
* @author Spencer Gibb
*/
public class LeaseManagerMessageBroker implements LeaseManager<InstanceInfo> {
private static final Logger logger = LoggerFactory.getLogger(LeaseManagerMessageBroker.class);
@Autowired
private ApplicationContext ctxt;
@Override
public void register(InstanceInfo info, int leaseDuration, boolean isReplication) {
logger.debug("register {}, vip {}, leaseDuration {}, isReplication {}",
info.getAppName(), info.getVIPAddress(), leaseDuration, isReplication);
//TODO: what to publish from info (whole object?)
ctxt.publishEvent(new EurekaInstanceRegisteredEvent(this, info.getAppName(),
info.getVIPAddress(), leaseDuration, isReplication));
}
@Override
public boolean cancel(String appName, String serverId, boolean isReplication) {
logger.debug("cancel {}, serverId {}, isReplication {}", appName, serverId, isReplication);
ctxt.publishEvent(new EurekaInstanceCanceledEvent(this, appName, serverId, isReplication));
return false;
}
@Override
public boolean renew(String appName, String serverId, boolean isReplication) {
logger.debug("renew {}, serverId {}, isReplication {}", appName, serverId, isReplication);
ctxt.publishEvent(new EurekaInstanceRenewedEvent(this, appName, serverId, isReplication));
return false;
}
@Override
public void evict() {}
}