hazelcast-demo:带有hazelcast缓存演示的Spring Boot

# hazelcast 不完全指南 ### 实现了同实例缓存共吸共享,没有测试不同实例(IP) 缓存共享,还需要测试 已经找到了可能的配置项 - configuration ```java @Configuration @EnableCaching public class HazelcastConfiguration { @Bean public Config hazelCastConfig() { Config config = new Config("demo"); RestApiConfig restApiConfig = new RestApiConfig(); restApiConfig.setEnabled(true); MulticastConfig multicastConfig = new MulticastConfig(); multicastConfig.setEnabled(true); TcpIpConfig tcpIpConfig = new TcpIpConfig(); tcpIpConfig.addMember("localhost"); JoinConfig joinConfig = new JoinConfig(); joinConfig.setTcpIpConfig(tcpIpConfig); NetworkConfig networkConfig = new NetworkConfig(); networkConfig.setRestApiConfig(restApiConfig); networkConfig.setPort(5801); networkConfig.setJoin(joinConfig); config.setNetworkConfig(networkConfig); return config; } } ``` 其中 Config 的构造参数 ```java /** * @param evictionConfig {@link EvictionConfiguration} for * requested {@link EvictionPolicyEvaluator} implementation * @param classLoader the {@link java.lang.ClassLoader} to be * used while creating custom {@link EvictionPolicyComparator} * if it is specified in the config * @return {@link * EvictionPolicyComparator} instance if it is defined, otherwise * returns null to indicate there is no comparator defined */ public static EvictionPolicyComparator getEvictionPolicyComparator(EvictionConfiguration evictionConfig, ClassLoader classLoader) { // 1. First check comparator class name String evictionPolicyComparatorClassName = evictionConfig.getComparatorClassName(); if (!isNullOrEmpty(evictionPolicyComparatorClassName)) { try { return ClassLoaderUtil.newInstance(classLoader, evictionPolicyComparatorClassName); } catch (Exception e) { throw rethrow(e); } } // 2. Then check comparator implementation EvictionPolicyComparator comparator = evictionConfig.getComparator(); if (comparator != null) { return comparator; } // 3. As a last resort, try to pick an out-of-the-box comparator implementation return pickOutOfTheBoxComparator(evictionConfig.getEvictionPolicy()); } ``` 其中如果在EvictionConfig中设置了Compare了在2步骤返回比较器,否则查找默认的规则比较器 ```java /** * Returns the instance name uniquely identifying the hazelcast instance * created by this configuration. This name is used in different scenarios, * such as identifying the hazelcast instance when running multiple * instances in the same JVM. * * @return the hazelcast instance name */ ``` `` RestApiConfig 为开启 Rest API 可以 call 通RestApi 但是提示没有 Provider,具体功能还需要研究`` 其中 MulticastConfig enable 为 ```java /** * Enables or disables the multicast discovery mechanism * * @param enabled {@code true} to enable, {@code false} to disable * @return the updated MulticastConfig */ ``` 可以通过 MulticastConfig 的注释看到 ```java /** * Contains the configuration for the multicast discovery mechanism. * <p> * With the multicast discovery mechanism Hazelcast allows Hazelcast members to find each other using multicast. So * Hazelcast members do not need to know concrete addresses of members, they just multicast to everyone listening. * <p> * It depends on your environment if multicast is possible or allowed; you need to have a look at the * TCP/IP cluster: {@link TcpIpConfig}. */ ``` the multicast discovery need config TCPConfig   根据上两张图可以看到 TCPConfig 是在JoinConfig里面 而JoinConfig 在NetworkConfig中配置 所以尝试addMember(Member member) 方法 添加localhost      我们可以从上面的查找流程看到写localhost是可以被解析的 hazelcast 会先从 Spring IOC容器中查找 Config 如果没有 还会查找resource下面的 hazelcast.yml or hazelcast.xml ... 因为我们已经注入了IOC所以不需要配置文件 ## Testing 注册两个实例(同IP)   分别启动在8080 和 8081 两个web 监听  可以看到他已经启动了一个实例 我们接下来启动另外一个  现在看一看 controller里面的代码  很常规的一个 耗时 spring cache 的测试方法   可以看到这里进入了耗时方法 接下来请求8081   并且 8081 没有进入耗时方法,说明 spring cache aop 的 cache manager 右 hazelcast 接管 并且进入判断 其他的 benchmark 还有 不同IP 需要条件测试