如何使用嵌入式tomcat会话集群设置Spring引导应用程序?
我想设置一个带有嵌入式tomcat会话集群的Spring引导应用程序如何使用嵌入式tomcat会话集群设置Spring引导应用程序?,spring,tomcat,spring-boot,Spring,Tomcat,Spring Boot,我想设置一个带有嵌入式tomcat会话集群的Spring引导应用程序 @Component public class WebServerCustomizer implements WebServerFactoryCustomizer<TomcatServletWebServerFactory> { @Override public void customize( final TomcatServletWebServerFactory factory ) {
@Component
public class WebServerCustomizer implements WebServerFactoryCustomizer<TomcatServletWebServerFactory> {
@Override
public void customize( final TomcatServletWebServerFactory factory ) {
factory.addContextCustomizers( new TomcatClusterContextCustomizer() );
}
}
public class TomcatClusterContextCustomizer implements TomcatContextCustomizer {
@Override
public void customize( final Context context ) {
// Call method defined in the question text above, but pass Engine
// instead of Tomcat
configureCluster( (Engine)context.getParent().getParent() );
}
}
由于嵌入式tomcat没有server.xml
文件,因此我创建了一个TomcatEmbeddedServletContainerFactory,并以编程方式设置集群配置。代码如下:
@Configuration
public class TomcatConfig
{
@Bean
public EmbeddedServletContainerFactory servletContainerFactory()
{
return new TomcatEmbeddedServletContainerFactory()
{
@Override
protected TomcatEmbeddedServletContainer getTomcatEmbeddedServletContainer(
Tomcat tomcat)
{
configureCluster(tomcat);
return super.getTomcatEmbeddedServletContainer(tomcat);
}
private void configureCluster(Tomcat tomcat)
{
// static membership cluster
SimpleTcpCluster cluster = new SimpleTcpCluster();
cluster.setChannelStartOptions(3);
{
DeltaManager manager = new DeltaManager();
manager.setNotifyListenersOnReplication(true);
cluster.setManagerTemplate(manager);
}
{
GroupChannel channel = new GroupChannel();
{
NioReceiver receiver = new NioReceiver();
receiver.setPort(localClusterMemberPort);
channel.setChannelReceiver(receiver);
}
{
ReplicationTransmitter sender = new ReplicationTransmitter();
sender.setTransport(new PooledParallelSender());
channel.setChannelSender(sender);
}
channel.addInterceptor(new TcpPingInterceptor());
channel.addInterceptor(new TcpFailureDetector());
channel.addInterceptor(new MessageDispatch15Interceptor());
{
StaticMembershipInterceptor membership =
new StaticMembershipInterceptor();
String[] memberSpecs = clusterMembers.split(",", -1);
for (String spec : memberSpecs)
{
ClusterMemberDesc memberDesc = new ClusterMemberDesc(spec);
StaticMember member = new StaticMember();
member.setHost(memberDesc.address);
member.setPort(memberDesc.port);
member.setDomain("MyWebAppDomain");
member.setUniqueId(memberDesc.uniqueId);
membership.addStaticMember(member);
}
channel.addInterceptor(membership);
}
cluster.setChannel(channel);
}
cluster.addValve(new ReplicationValve());
cluster.addValve(new JvmRouteBinderValve());
cluster.addClusterListener(new ClusterSessionListener());
tomcat.getEngine().setCluster(cluster);
}
};
}
private static class ClusterMemberDesc
{
public String address;
public int port;
public String uniqueId;
public ClusterMemberDesc(String spec) throws IllegalArgumentException
{
String[] values = spec.split(":", -1);
if (values.length != 3)
throw new IllegalArgumentException("clusterMembers element " +
"format must be address:port:uniqueIndex");
address = values[0];
port = Integer.parseInt(values[1]);
int index = Integer.parseInt(values[2]);
if ((index < 0) || (index > 255))
throw new IllegalArgumentException("invalid unique index: must be >= 0 and < 256");
uniqueId = "{";
for (int i = 0; i < 16; i++, index++)
{
if (i != 0)
uniqueId += ',';
uniqueId += index % 256;
}
uniqueId += '}';
}
};
// This is for example. In fact these are read from application.properties
private int localClusterMemberPort = 9991;
private String clusterMembers = "111.222.333.444:9992:1";
}
显然,HttpSession没有被共享。但是,当第二个实例创建新会话时,第一个实例的登录信息将被清除,登录将无效
这里发生了什么?会话已共享,但HttpSession未共享
顺便说一句,我已经读到,应用程序要使用tomcat会话集群,必须在web.xml
上指定
标记。但我不知道如何在SpringBoot的无xml环境中指定它。这是问题的原因吗?那怎么具体呢
我已经搜索并找到了一些显示使用Redis进行集群的文档。但目前我不想在配置中添加其他移动部件。在我的配置中,最多有3~4个节点。关键是使上下文可分发,并设置管理器 当我修改问题代码如下时,会话集群起作用了
@Configuration
public class TomcatConfig
{
@Bean
public EmbeddedServletContainerFactory servletContainerFactory()
{
TomcatEmbeddedServletContainerFactory factory = new TomcatEmbeddedServletContainerFactory()
{
...
};
factory.addContextCustomizers(new TomcatContextCustomizer()
{
@Override
public void customize(Context context)
{
context.setManager(new DeltaManager());
context.setDistributable(true);
}
});
return factory;
}
...
}
对于Spring Boot 1.2.4,不需要context.setManager()。但是对于1.3.0版本的Spring引导,如果未调用context.setManager(),集群将失败,并显示以下日志
2015-11-18 19:59:42.882 WARN 9764 --- [ost-startStop-1] o.a.catalina.ha.tcp.SimpleTcpCluster : Manager [org.apache.catalina.session.StandardManager[]] does not implement ClusterManager, addition to cluster has been aborted.
我有点担心这个版本依赖性。因此,我对此很感兴趣。在SpringBoot2.0.x中,您需要使用
WebServerFactoryCustomizer
来配置集群
@Component
public class WebServerCustomizer implements WebServerFactoryCustomizer<TomcatServletWebServerFactory> {
@Override
public void customize( final TomcatServletWebServerFactory factory ) {
factory.addContextCustomizers( new TomcatClusterContextCustomizer() );
}
}
public class TomcatClusterContextCustomizer implements TomcatContextCustomizer {
@Override
public void customize( final Context context ) {
// Call method defined in the question text above, but pass Engine
// instead of Tomcat
configureCluster( (Engine)context.getParent().getParent() );
}
}
@组件
公共类WebServerCustomizer实现WebServerFactoryCustomizer{
@凌驾
public void定制(最终TomcatServletWebServerFactory工厂){
addContextCustomizer(新的TomcatClusterContextCustomizer());
}
}
公共类TomcatClusterContextCustomizer实现TomcatContextCustomizer{
@凌驾
公共void自定义(最终上下文){
//调用上面问题文本中定义的方法,但传递引擎
//而不是雄猫
configureCluster((引擎)context.getParent().getParent());
}
}
您可以使用Spring会话,添加一个注释,然后就可以完成了。@chrylis您能提供一个参考吗?我浏览了几篇与Spring Session相关的文章,但它们似乎都涉及到Redis,我目前不想包括我的配置。Spring团队似乎已经放弃了嵌入式Redis,因为它太麻烦了。您想把会话状态存储在哪里?文件夹?SQL?@chrylis我不想以任何方式存储会话状态。我想要的只是集群2~3个tomcat服务器,如果可能的话,没有L4交换机的粘性会话功能。因此,您只是在讨论内存状态同步,而不是在重新启动或其他任何情况下持久化?…如果您在context.xml中设置管理器,这难道不意味着不保存会话和会话复制吗?@zeodtr您能为我们提供spring boot版本2的完整解决方案吗。我们需要某种程度上相同的行为。@user2846382抱歉,我没有使用版本2的经验。