org.apache.dubbo.remoting.etcd.jetcd

Class JEtcdClientWrapper

java.lang.Object

org.apache.dubbo.remoting.etcd.jetcd.JEtcdClientWrapper

public class JEtcdClientWrapper
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_INBOUND_SIZE
static long	DEFAULT_REQUEST_TIMEOUT default request timeout
static String	ETCD_REQUEST_TIMEOUT_KEY
static String	GRPC_MAX_INBOUND_SIZE_KEY
static Charset	UTF_8

Constructor Summary

Constructors

Constructor and Description
JEtcdClientWrapper(URL url)

Method Summary

Modifier and Type	Method and Description
boolean	checkExists(String path) try to check if path exists.
long	createEphemeral(String path) create new ephemeral path save to etcd .
long	createLease(long second)
long	createLease(long ttl, long timeout, TimeUnit unit)
void	createPersistent(String path)
void	delete(String path)
String[]	endPoints(String backupAddress)
io.grpc.ManagedChannel	getChannel() try to get current connected channel.
List<String>	getChildren(String path) find direct children directory, excluding path self, Never return null.
io.etcd.jetcd.Client	getClient()
ConnectionStateListener	getConnectionStateListener()
String	getKVValue(String key)
boolean	isConnected()
void	keepAlive(long lease)
boolean	put(String key, String value)
boolean	putEphemeral(String key, String value)
static void	requiredNotNull(Object obj, RuntimeException exeception)
void	revokeLease(long lease)
void	setConnectionStateListener(ConnectionStateListener connectionStateListener)
void	start() because jetcd's connection change callback not supported yet, we must loop to test if connect or disconnect event happend or not.

Methods inherited from class java.lang.Object

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

Field Detail

UTF_8

public static final Charset UTF_8

DEFAULT_REQUEST_TIMEOUT

public static final long DEFAULT_REQUEST_TIMEOUT

default request timeout

DEFAULT_INBOUND_SIZE

public static final int DEFAULT_INBOUND_SIZE

See Also:

Constant Field Values

GRPC_MAX_INBOUND_SIZE_KEY

public static final String GRPC_MAX_INBOUND_SIZE_KEY

See Also:

Constant Field Values

ETCD_REQUEST_TIMEOUT_KEY

public static final String ETCD_REQUEST_TIMEOUT_KEY

See Also:

Constant Field Values

Constructor Detail

JEtcdClientWrapper

public JEtcdClientWrapper(URL url)

Method Detail

getClient

public io.etcd.jetcd.Client getClient()

getChannel

public io.grpc.ManagedChannel getChannel()

try to get current connected channel.

Returns:

connected channel.

getChildren

public List<String> getChildren(String path)

find direct children directory, excluding path self, Never return null.

Parameters:

path - the path to be found direct children.

Returns:

direct children directory, contains zero element list if children directory not exists.

isConnected

public boolean isConnected()

createLease

public long createLease(long second)

revokeLease

public void revokeLease(long lease)

createLease

public long createLease(long ttl,
                        long timeout,
                        TimeUnit unit)
                 throws InterruptedException,
                        ExecutionException,
                        TimeoutException

Throws:

InterruptedException

ExecutionException

TimeoutException

checkExists

public boolean checkExists(String path)

try to check if path exists.

createPersistent

public void createPersistent(String path)

createEphemeral

public long createEphemeral(String path)

create new ephemeral path save to etcd . if node disconnect from etcd, it will be deleted automatically by etcd when session timeout.

Parameters:

path - the path to be saved

Returns:

the lease of current path.

keepAlive

public void keepAlive(long lease)

delete

public void delete(String path)

endPoints

public String[] endPoints(String backupAddress)

start

public void start()

because jetcd's connection change callback not supported yet, we must loop to test if connect or disconnect event happend or not. It will be changed in the future if we found better choice.

getConnectionStateListener

public ConnectionStateListener getConnectionStateListener()

setConnectionStateListener

public void setConnectionStateListener(ConnectionStateListener connectionStateListener)

requiredNotNull

public static void requiredNotNull(Object obj,
                                   RuntimeException exeception)

getKVValue

public String getKVValue(String key)

put

public boolean put(String key,
                   String value)

putEphemeral

public boolean putEphemeral(String key,
                            String value)