AbstractFourLetterCommand (Apache ZooKeeper - Server 3.9.3 API)

java.lang.Object
- org.apache.zookeeper.server.command.AbstractFourLetterCommand

Direct Known Subclasses:

CnxnStatResetCommand, ConfCommand, ConsCommand, DigestCommand, DirsCommand, DumpCommand, EnvCommand, IsroCommand, MonitorCommand, NopCommand, RuokCommand, SetTraceMaskCommand, StatCommand, StatResetCommand, TraceMaskCommand, WatchCommand
```
public abstract class AbstractFourLetterCommand
extends Object
```
Set of threads for command ports. All the 4 letter commands are run via a thread. Each class maps to a corresponding 4 letter command. CommandThread is the abstract class from which all the others inherit.

Field Summary

Fields
Modifier and Type	Field	Description
`protected ServerCnxnFactory`	`factory`
`protected PrintWriter`	`pw`
`protected ServerCnxn`	`serverCnxn`
`static String`	`ZK_NOT_SERVING`
`protected ZooKeeperServer`	`zkServer`

Constructor Summary

Constructors
Constructor Description

AbstractFourLetterCommand(PrintWriter pw, ServerCnxn serverCnxn)

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`abstract void`	`commandRun()`
`void`	`run()`
`void`	`setFactory(ServerCnxnFactory factory)`
`void`	`setZkServer(ZooKeeperServer zkServer)`
`void`	`start()`

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

Field Detail

ZK_NOT_SERVING

public static final String ZK_NOT_SERVING

See Also:: Constant Field Values

pw
```
protected PrintWriter pw
```

serverCnxn
```
protected ServerCnxn serverCnxn
```

zkServer
```
protected ZooKeeperServer zkServer
```

factory
```
protected ServerCnxnFactory factory
```

Constructor Detail

AbstractFourLetterCommand

public AbstractFourLetterCommand(PrintWriter pw,
                                 ServerCnxn serverCnxn)

Method Detail

start
```
public void start()
```

run
```
public void run()
```

setZkServer

public void setZkServer(ZooKeeperServer zkServer)

setFactory

public void setFactory(ServerCnxnFactory factory)

commandRun

public abstract void commandRun()
                         throws IOException

Throws:: IOException