Uses of Interface org.apache.zookeeper.Watcher (ZooKeeper 3.4.11 API)

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Packages that use Watcher
Package Description
org.apache.zookeeper
+

Packages that use Watcher
Package	Description
org.apache.zookeeper

Uses of Watcher in org.apache.zookeeper

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Methods in org.apache.zookeeper with parameters of type Watcher
Modifier and Type	Method and Description
`Stat`	ZooKeeper.`exists(java.lang.String path, + Watcher watcher)` + Return the stat of the node of the given path. +
`void`	ZooKeeper.`exists(java.lang.String path, + Watcher watcher, + AsyncCallback.StatCallback cb, + java.lang.Object ctx)` + The asynchronous version of exists. +
`java.util.List<java.lang.String>`	ZooKeeper.`getChildren(java.lang.String path, + Watcher watcher)` + Return the list of the children of the node of the given path. +
`void`	ZooKeeper.`getChildren(java.lang.String path, + Watcher watcher, + AsyncCallback.Children2Callback cb, + java.lang.Object ctx)` + The asynchronous version of getChildren. +
`void`	ZooKeeper.`getChildren(java.lang.String path, + Watcher watcher, + AsyncCallback.ChildrenCallback cb, + java.lang.Object ctx)` + The asynchronous version of getChildren. +
`java.util.List<java.lang.String>`	ZooKeeper.`getChildren(java.lang.String path, + Watcher watcher, + Stat stat)` + For the given znode path return the stat and children list. +
`void`	ZooKeeper.`getData(java.lang.String path, + Watcher watcher, + AsyncCallback.DataCallback cb, + java.lang.Object ctx)` + The asynchronous version of getData. +
`byte[]`	ZooKeeper.`getData(java.lang.String path, + Watcher watcher, + Stat stat)` + Return the data and the stat of the node of the given path. +
`void`	ZooKeeper.`register(Watcher watcher)` + Specify the default watcher for the connection (overrides the one + specified during construction). +

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Constructors in org.apache.zookeeper with parameters of type Watcher
Constructor and Description
`ZooKeeper(java.lang.String connectString, + int sessionTimeout, + Watcher watcher)` + To create a ZooKeeper client object, the application needs to pass a + connection string containing a comma separated list of host:port pairs, + each corresponding to a ZooKeeper server. +
`ZooKeeper(java.lang.String connectString, + int sessionTimeout, + Watcher watcher, + boolean canBeReadOnly)` + To create a ZooKeeper client object, the application needs to pass a + connection string containing a comma separated list of host:port pairs, + each corresponding to a ZooKeeper server. +
`ZooKeeper(java.lang.String connectString, + int sessionTimeout, + Watcher watcher, + long sessionId, + byte[] sessionPasswd)` + To create a ZooKeeper client object, the application needs to pass a + connection string containing a comma separated list of host:port pairs, + each corresponding to a ZooKeeper server. +
`ZooKeeper(java.lang.String connectString, + int sessionTimeout, + Watcher watcher, + long sessionId, + byte[] sessionPasswd, + boolean canBeReadOnly)` + To create a ZooKeeper client object, the application needs to pass a + connection string containing a comma separated list of host:port pairs, + each corresponding to a ZooKeeper server. +

No usage of org.apache.zookeeper.ZooDefs.Ids

No usage of org.apache.zookeeper.ZooDefs.OpCode

No usage of org.apache.zookeeper.ZooDefs.Perms

No usage of org.apache.zookeeper.ZooDefs

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Packages that use ZooKeeper.States
Package Description
org.apache.zookeeper
+

Packages that use ZooKeeper.States
Package	Description
org.apache.zookeeper

+ + +

Uses of ZooKeeper.States in org.apache.zookeeper

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Methods in org.apache.zookeeper that return ZooKeeper.States
Modifier and Type	Method and Description
`ZooKeeper.States`	ZooKeeper.`getState()`
`static ZooKeeper.States`	ZooKeeper.States.`valueOf(java.lang.String name)` + Returns the enum constant of this type with the specified name. +
`static ZooKeeper.States[]`	ZooKeeper.States.`values()` + Returns an array containing the constants of this enum type, in +the order they are declared. +

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Packages that use ZooKeeper
Package Description
org.apache.zookeeper
+

Packages that use ZooKeeper
Package	Description
org.apache.zookeeper

+ + +

Uses of ZooKeeper in org.apache.zookeeper

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Methods in org.apache.zookeeper with parameters of type ZooKeeper
Modifier and Type	Method and Description
`static boolean`	ZooKeeperMain.`createQuota(ZooKeeper zk, + java.lang.String path, + long bytes, + int numNodes)` + this method creates a quota node for the path +
`static boolean`	ZooKeeperMain.`delQuota(ZooKeeper zk, + java.lang.String path, + boolean bytes, + boolean numNodes)` + this method deletes quota for a node. +

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Constructors in org.apache.zookeeper with parameters of type ZooKeeper
Constructor and Description
`ZooKeeperMain(ZooKeeper zk)`

No usage of org.apache.zookeeper.ZooKeeperMain

java.lang.Object
+
- org.apache.zookeeper.client.FourLetterWordMain
+

+
+

@InterfaceAudience.Public
+public class FourLetterWordMain
+extends java.lang.Object

+ +

+ + +
Constructor Summary
+ + + + + + + + +
Constructors
Constructor and Description
FourLetterWordMain()
+

Constructors
Constructor and Description
`FourLetterWordMain()`

+ +

+ + +

Method Summary

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All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static void`	`main(java.lang.String[] args)`
`static java.lang.String`	`send4LetterWord(java.lang.String host, + int port, + java.lang.String cmd)` + Send the 4letterword +
`static java.lang.String`	`send4LetterWord(java.lang.String host, + int port, + java.lang.String cmd, + int timeout)` + Send the 4letterword +

+ + +
Methods inherited from class java.lang.Object
+equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

+ +

+ + +
Constructor Detail
+ + + +
- +
  FourLetterWordMain
  +
```
public FourLetterWordMain()
```
  +
+

+ +

+ + +

Method Detail

+ + + +

send4LetterWord

public static java.lang.String send4LetterWord(java.lang.String host,
+                                               int port,
+                                               java.lang.String cmd)
+                                        throws java.io.IOException

Send the 4letterword

Parameters:: host - the destination host; port - the destination port; cmd - the 4letterword
Returns:: server response
Throws:: java.io.IOException

+ + + +

send4LetterWord

public static java.lang.String send4LetterWord(java.lang.String host,
+                                               int port,
+                                               java.lang.String cmd,
+                                               int timeout)
+                                        throws java.io.IOException

Send the 4letterword

Parameters:: host - the destination host; port - the destination port; cmd - the 4letterword; timeout - in milliseconds, maximum time to wait while connecting/reading data
Returns:: server response
Throws:: java.io.IOException

+ + + +

main

public static void main(java.lang.String[] args)
+                 throws java.io.IOException

Throws:: java.io.IOException

+
+
All Known Implementing Classes:
+
StaticHostProvider
+
+
+
+
```
@InterfaceAudience.Public
+public interface HostProvider
```
+
A set of hosts a ZooKeeper client should connect to. + + Classes implementing this interface must guarantee the following: + + * Every call to next() returns an InetSocketAddress. So the iterator never + ends. + + * The size() of a HostProvider may never be zero. + + A HostProvider must return resolved InetSocketAddress instances on next(), + but it's up to the HostProvider, when it wants to do the resolving. + + Different HostProvider could be imagined: + + * A HostProvider that loads the list of Hosts from an URL or from DNS + * A HostProvider that re-resolves the InetSocketAddress after a timeout. + * A HostProvider that prefers nearby hosts.
+

+ +

+ + +

Method Summary

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All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`java.net.InetSocketAddress`	`next(long spinDelay)` + The next host to try to connect to. +
`void`	`onConnected()` + Notify the HostProvider of a successful connection. +
`int`	`size()`

+ +
- + + +
  Method Detail
  + + + +
  - +
    size
    +
```
int size()
```
    +
  + + + +
  - +
    next
    +
```
java.net.InetSocketAddress next(long spinDelay)
```
    +
    The next host to try to connect to. + + For a spinDelay of 0 there should be no wait.
    +
    +
    Parameters:
    +
    spinDelay - Milliseconds to wait if all hosts have been tried once.
    +
    +
  + + + +
  - +
    onConnected
    +
```
void onConnected()
```
    +
    Notify the HostProvider of a successful connection. + + The HostProvider may use this notification to reset it's inner state.
    +
  +
+