courator - create

Posted 2021-01-06 xiaobin-hlj80

0. retry policy

    

RetryPolicy retryPolicy  = new ExponentialBackoffRetry(3000,3);

 

1. client

    1) recipes

• org.apache.curator.framework.recipes.leader.LeaderSelector
• org.apache.curator.framework.recipes.cache.TreeCache
• org.apache.curator.framework.recipes.cache.PathChildrenCache
• org.apache.curator.x.discovery.ServiceDiscovery

 

    2) CuratorFramework

• org.apache.curator.framework.CuratorFramework

       (curator-frameworksrcmainjavaorgapachecuratorframeworkCuratorFramework.java)

 

2.create

curator-frameworksrcmainjavaorgapachecuratorframework
CuratorFrameworkFactory.java

1) simple

default:

CuratorFramework newClient(String connectString, RetryPolicy retryPolicy);

 

client.newClient("tdtc101:2181, tdtc102:2181, tdtc103:2181", retryPolicy);

 

advanced:

CuratorFramework newClient(String connectString, int sessionTimeoutMs, int connectionTimeoutMs, RetryPolicy retryPolicy);

 

client.newClient("tdtc101:2181, tdtc102:2181, tdtc103:2181", 60 * 1000, 15 * 1000, retryPolicy);

 

2) Fluent style

default:

client = CuratorFrameworkFactory.builder()
        .connectString("tdtc101:2181, tdtc102:2181, tdtc103:2181")
        .retryPolicy(retryPolicy)
        .build();

advanced:

client = CuratorFrameworkFactory.builder()
        .connectString("tdtc101:2181, tdtc102:2181, tdtc103:2181")
        .sessionTimeoutMs(60 * 1000)    // CuratorFrameworkFactory.java Ln61
        .connectionTimeoutMs(15 * 1000) // CuratorFrameworkFactory.java Ln62
        .retryPolicy(retryPolicy)
        .build();

 

3. start

    client.start();