package zookeeper;
import org.apache.curator.RetryPolicy;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.retry.ExponentialBackoffRetry;
import org.junit.Test;
public class Curator {
@Test
public void testClient() throws Exception {
CuratorFramework client = null;
client = createSimple("127.0.0.1:2181,127.0.0.2:2181,127.0.0.3:2181");
client.start();
byte[] bs = client.getData().forPath("/jianghuiwen");
System.out.println(new String(bs));
//client.create().forPath("/fwcheduler","my".getBytes());
//client.create().forPath("/jianghuiwen", "my".getBytes());
}
public static CuratorFramework createSimple(String connectionString) {
// these are reasonable arguments for the ExponentialBackoffRetry.
// The first retry will wait 1 second - the second will wait up to 2 seconds - the
// third will wait up to 4 seconds.
ExponentialBackoffRetry retryPolicy = new ExponentialBackoffRetry(1000, 3);
// The simplest way to get a CuratorFramework instance. This will use default values.
// The only required arguments are the connection string and the retry policy
return CuratorFrameworkFactory.newClient(connectionString, retryPolicy);
}
public static CuratorFramework createWithOptions(String connectionString, RetryPolicy retryPolicy, int connectionTimeoutMs, int sessionTimeoutMs) {
// using the CuratorFrameworkFactory.builder() gives fine grained control
// over creation options. See the CuratorFrameworkFactory.Builder javadoc details
return CuratorFrameworkFactory.builder().connectString(connectionString)
.retryPolicy(retryPolicy)
.connectionTimeoutMs(connectionTimeoutMs)
.sessionTimeoutMs(sessionTimeoutMs)
// etc. etc.
.build();
}
}
<dependency>
<groupId>org.apache.curator</groupId>
<artifactId>curator-recipes</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.5.2-alpha</version>
</dependency>
