1.3. 请求平衡

热备份 Java 客户端将请求平衡到 Data Grid Server 集群，以便读写操作分散到节点间。

使用 BASIC 或 TOPOLOGY_AWARE 智能的客户端使用所有请求的请求平衡。使用 HASH_DISTRIBUTION_AWARE 智能将请求直接发送到存储所需密钥的节点的客户端。如果节点没有响应，客户端会回退到请求平衡。

默认平衡策略是循环的，因此 Hot Rod 客户端执行请求平衡，例如： s1、s2、s3 是 Data Grid 集群中的节点：

// Connect to the Data Grid cluster
RemoteCacheManager cacheManager = new RemoteCacheManager(builder.build());
// Obtain the remote cache
RemoteCache<String, String> cache = cacheManager.getCache("test");

//Hot Rod client sends a request to the "s1" node
cache.put("key1", "aValue");
//Hot Rod client sends a request to the "s2" node
cache.put("key2", "aValue");
//Hot Rod client sends a request to the "s3" node
String value = cache.get("key1");
//Hot Rod client sends the next request to the "s1" node again
cache.remove("key2");

// Connect to the Data Grid cluster
RemoteCacheManager cacheManager = new RemoteCacheManager(builder.build());
// Obtain the remote cache
RemoteCache<String, String> cache = cacheManager.getCache("test");

//Hot Rod client sends a request to the "s1" node
cache.put("key1", "aValue");
//Hot Rod client sends a request to the "s2" node
cache.put("key2", "aValue");
//Hot Rod client sends a request to the "s3" node
String value = cache.get("key1");
//Hot Rod client sends the next request to the "s1" node again
cache.remove("key2");

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自定义平衡策略

如果您在 Hot Rod 客户端配置中添加类，您可以使用自定义 FailoverRequestBalancingStrategy 实现。

ConfigurationBuilder

ConfigurationBuilder builder = new ConfigurationBuilder();
builder.addServer()
         .host("127.0.0.1")
         .port(11222)
         .balancingStrategy(new MyCustomBalancingStrategy());

ConfigurationBuilder builder = new ConfigurationBuilder();
builder.addServer()
         .host("127.0.0.1")
         .port(11222)
         .balancingStrategy(new MyCustomBalancingStrategy());

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hotrod-client.properties

infinispan.client.hotrod.request_balancing_strategy=my.package.MyCustomBalancingStrategy

infinispan.client.hotrod.request_balancing_strategy=my.package.MyCustomBalancingStrategy

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1.3. 请求平衡

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