org.lable.oss.dynamicconfig.provider.zookeeper

Class ZookeepersAsConfigSource

java.lang.Object

org.lable.oss.dynamicconfig.provider.zookeeper.ZookeepersAsConfigSource

All Implemented Interfaces:

Closeable, AutoCloseable, ConfigurationSource

public class ZookeepersAsConfigSource
extends Object
implements ConfigurationSource

Retrieve configuration from a Zookeeper quorum, and maintain a watch for updates.

Constructor Summary

Constructors

Constructor and Description
ZookeepersAsConfigSource() Construct a new ZookeepersAsConfigSource.

Method Summary

Modifier and Type	Method and Description
void	close()
void	configure(org.apache.commons.configuration.Configuration configuration) This class required two parameters to be set in the configuration object passed: quorum Comma-separated list of addresses for the Zookeeper quorum.
void	listen(HierarchicalConfigurationDeserializer deserializer, ConfigChangeListener listener) When this method is called, it connects to the Zookeeper quorum, and maintains a watch on the configuration node.
void	load(HierarchicalConfigurationDeserializer deserializer, ConfigChangeListener listener) For the initial loading of the configuration, this class connects to the Zookeeper quorum, waits for a successful connection, and then loads the configuration once.
String	name()
List<String>	systemProperties()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ZookeepersAsConfigSource

public ZookeepersAsConfigSource()

Construct a new ZookeepersAsConfigSource.

Method Detail

name

public String name()

Specified by:

name in interface ConfigurationSource

systemProperties

public List<String> systemProperties()

Specified by:

systemProperties in interface ConfigurationSource

configure

public void configure(org.apache.commons.configuration.Configuration configuration)
               throws ConfigurationException

This class required two parameters to be set in the configuration object passed:

quorum

Comma-separated list of addresses for the Zookeeper quorum.

znode

Path to the configuration node.

Additionally, the following optional parameter may be set:

copy.quorum.to

Copy the ZooKeeper quorum to this configuration parameter to make it available in the configuration object loaded by this class.

Specified by:

configure in interface ConfigurationSource

Throws:

ConfigurationException

listen

public void listen(HierarchicalConfigurationDeserializer deserializer,
                   ConfigChangeListener listener)

When this method is called, it connects to the Zookeeper quorum, and maintains a watch on the configuration node.

Specified by:

listen in interface ConfigurationSource

load

public void load(HierarchicalConfigurationDeserializer deserializer,
                 ConfigChangeListener listener)
          throws ConfigurationException

For the initial loading of the configuration, this class connects to the Zookeeper quorum, waits for a successful connection, and then loads the configuration once.

Specified by:

load in interface ConfigurationSource

Throws:

ConfigurationException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException