org.redisson

Class RedissonReadWriteLock

java.lang.Object

org.redisson.RedissonReadWriteLock

All Implemented Interfaces:

ReadWriteLock, RExpirable, RExpirableAsync, RObject, RObjectAsync, RReadWriteLock

public class RedissonReadWriteLock
extends Object
implements RReadWriteLock

A ReadWriteLock maintains a pair of associated locks, one for read-only operations and one for writing. The read lock may be held simultaneously by multiple reader threads, so long as there are no writers. The write lock is exclusive. Works in non-fair mode. Therefore order of read and write locking is unspecified.

Author:

Nikita Koksharov

Field Summary

Fields

Modifier and Type	Field and Description
static Long	unlockMessage

Method Summary

Methods

Modifier and Type	Method and Description
boolean	clearExpire() Clear an expire timeout or expire date for object.
io.netty.util.concurrent.Future<Boolean>	clearExpireAsync() Clear an expire timeout or expire date for object in async mode.
boolean	delete() Deletes the object
io.netty.util.concurrent.Future<Boolean>	deleteAsync() Delete object in async mode
boolean	expire(long timeToLive, TimeUnit timeUnit) Set a timeout for object.
io.netty.util.concurrent.Future<Boolean>	expireAsync(long timeToLive, TimeUnit timeUnit) Set a timeout for object in async mode.
boolean	expireAt(Date timestamp) Set an expire date for object.
boolean	expireAt(long timestamp) Set an expire date for object.
io.netty.util.concurrent.Future<Boolean>	expireAtAsync(Date timestamp) Set an expire date for object in async mode.
io.netty.util.concurrent.Future<Boolean>	expireAtAsync(long timestamp) Set an expire date for object in async mode.
protected <V> V	get(io.netty.util.concurrent.Future<V> future)
String	getName() Returns name of object
boolean	isExists() Check object existence
io.netty.util.concurrent.Future<Boolean>	isExistsAsync() Check object existence in async mode.
void	migrate(String host, int port, int database) Transfer a object from a source Redis instance to a destination Redis instance
io.netty.util.concurrent.Future<Void>	migrateAsync(String host, int port, int database) Transfer a object from a source Redis instance to a destination Redis instance in async mode
boolean	move(int database) Move object to another database
io.netty.util.concurrent.Future<Boolean>	moveAsync(int database) Move object to another database in async mode
protected <V> io.netty.util.concurrent.Promise<V>	newPromise()
protected <V> io.netty.util.concurrent.Future<V>	newSucceededFuture(V result)
RLock	readLock() Returns the lock used for reading.
long	remainTimeToLive() Remaining time to live of Redisson object that has a timeout
io.netty.util.concurrent.Future<Long>	remainTimeToLiveAsync() Get remaining time to live of object in seconds.
void	rename(String newName) Rename current object key to newName
io.netty.util.concurrent.Future<Void>	renameAsync(String newName) Rename current object key to newName in async mode
boolean	renamenx(String newName) Rename current object key to newName only if new key is not exists
io.netty.util.concurrent.Future<Boolean>	renamenxAsync(String newName) Rename current object key to newName in async mode only if new key is not exists
RLock	writeLock() Returns the lock used for writing.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.redisson.core.RExpirable

clearExpire, expire, expireAt, expireAt, remainTimeToLive

Methods inherited from interface org.redisson.core.RObject

delete, getName, isExists, migrate, move, rename, renamenx

Methods inherited from interface org.redisson.core.RExpirableAsync

clearExpireAsync, expireAsync, expireAtAsync, expireAtAsync, remainTimeToLiveAsync

Methods inherited from interface org.redisson.core.RObjectAsync

deleteAsync, isExistsAsync, migrateAsync, moveAsync, renameAsync, renamenxAsync

Field Detail

unlockMessage

public static final Long unlockMessage

Method Detail

readLock

public RLock readLock()

Description copied from interface: RReadWriteLock

Returns the lock used for reading.

Specified by:

readLock in interface ReadWriteLock

Specified by:

readLock in interface RReadWriteLock

Returns:

the lock used for reading

writeLock

public RLock writeLock()

Description copied from interface: RReadWriteLock

Returns the lock used for writing.

Specified by:

writeLock in interface ReadWriteLock

Specified by:

writeLock in interface RReadWriteLock

Returns:

the lock used for writing

expire

public boolean expire(long timeToLive,
             TimeUnit timeUnit)

Description copied from interface: RExpirable

Set a timeout for object. After the timeout has expired, the key will automatically be deleted.

Specified by:

expire in interface RExpirable

Parameters:

timeToLive - - timeout before object will be deleted

timeUnit - - timeout time unit

Returns:

true if the timeout was set and false if not

expireAsync

public io.netty.util.concurrent.Future<Boolean> expireAsync(long timeToLive,
                                                   TimeUnit timeUnit)

Description copied from interface: RExpirableAsync

Set a timeout for object in async mode. After the timeout has expired, the key will automatically be deleted.

Specified by:

expireAsync in interface RExpirableAsync

Parameters:

timeToLive - - timeout before object will be deleted

timeUnit - - timeout time unit

Returns:

true if the timeout was set and false if not

expireAt

public boolean expireAt(long timestamp)

Description copied from interface: RExpirable

Set an expire date for object. When expire date comes the key will automatically be deleted.

Specified by:

expireAt in interface RExpirable

Parameters:

timestamp - - expire date in milliseconds (Unix timestamp)

Returns:

true if the timeout was set and false if not

expireAtAsync

public io.netty.util.concurrent.Future<Boolean> expireAtAsync(long timestamp)

Description copied from interface: RExpirableAsync

Set an expire date for object in async mode. When expire date comes the key will automatically be deleted.

Specified by:

expireAtAsync in interface RExpirableAsync

Parameters:

timestamp - - expire date in seconds (Unix timestamp)

Returns:

true if the timeout was set and false if not

expireAt

public boolean expireAt(Date timestamp)

Description copied from interface: RExpirable

Set an expire date for object. When expire date comes the key will automatically be deleted.

Specified by:

expireAt in interface RExpirable

Parameters:

timestamp - - expire date

Returns:

true if the timeout was set and false if not

expireAtAsync

public io.netty.util.concurrent.Future<Boolean> expireAtAsync(Date timestamp)

Description copied from interface: RExpirableAsync

Set an expire date for object in async mode. When expire date comes the key will automatically be deleted.

Specified by:

expireAtAsync in interface RExpirableAsync

Parameters:

timestamp - - expire date

Returns:

true if the timeout was set and false if not

clearExpire

public boolean clearExpire()

Description copied from interface: RExpirable

Clear an expire timeout or expire date for object.

Specified by:

clearExpire in interface RExpirable

Returns:

true if timeout was removed false if object does not exist or does not have an associated timeout

clearExpireAsync

public io.netty.util.concurrent.Future<Boolean> clearExpireAsync()

Description copied from interface: RExpirableAsync

Clear an expire timeout or expire date for object in async mode. Object will not be deleted.

Specified by:

clearExpireAsync in interface RExpirableAsync

Returns:

true if the timeout was cleared and false if not

remainTimeToLive

public long remainTimeToLive()

Description copied from interface: RExpirable

Remaining time to live of Redisson object that has a timeout

Specified by:

remainTimeToLive in interface RExpirable

Returns:

time in milliseconds -2 if the key does not exist. -1 if the key exists but has no associated expire.

remainTimeToLiveAsync

public io.netty.util.concurrent.Future<Long> remainTimeToLiveAsync()

Description copied from interface: RExpirableAsync

Get remaining time to live of object in seconds.

Specified by:

remainTimeToLiveAsync in interface RExpirableAsync

Returns:

-1 if object does not exist or time in seconds

get

protected <V> V get(io.netty.util.concurrent.Future<V> future)

newPromise

protected <V> io.netty.util.concurrent.Promise<V> newPromise()

newSucceededFuture

protected <V> io.netty.util.concurrent.Future<V> newSucceededFuture(V result)

getName

public String getName()

Description copied from interface: RObject

Returns name of object

Specified by:

getName in interface RObject

Returns:

name

rename

public void rename(String newName)

Description copied from interface: RObject

Rename current object key to newName

Specified by:

rename in interface RObject

renameAsync

public io.netty.util.concurrent.Future<Void> renameAsync(String newName)

Description copied from interface: RObjectAsync

Rename current object key to newName in async mode

Specified by:

renameAsync in interface RObjectAsync

Returns:

migrate

public void migrate(String host,
           int port,
           int database)

Description copied from interface: RObject

Transfer a object from a source Redis instance to a destination Redis instance

Specified by:

migrate in interface RObject

Parameters:

host - - destination host

port - - destination port

database - - destination database

migrateAsync

public io.netty.util.concurrent.Future<Void> migrateAsync(String host,
                                                 int port,
                                                 int database)

Description copied from interface: RObjectAsync

Transfer a object from a source Redis instance to a destination Redis instance in async mode

Specified by:

migrateAsync in interface RObjectAsync

Parameters:

host - - destination host

port - - destination port

database - - destination database

Returns:

move

public boolean move(int database)

Description copied from interface: RObject

Move object to another database

Specified by:

move in interface RObject

Returns:

true if key was moved else false

moveAsync

public io.netty.util.concurrent.Future<Boolean> moveAsync(int database)

Description copied from interface: RObjectAsync

Move object to another database in async mode

Specified by:

moveAsync in interface RObjectAsync

Returns:

true if key was moved false if not

renamenx

public boolean renamenx(String newName)

Description copied from interface: RObject

Rename current object key to newName only if new key is not exists

Specified by:

renamenx in interface RObject

Returns:

renamenxAsync

public io.netty.util.concurrent.Future<Boolean> renamenxAsync(String newName)

Description copied from interface: RObjectAsync

Rename current object key to newName in async mode only if new key is not exists

Specified by:

renamenxAsync in interface RObjectAsync

Returns:

delete

public boolean delete()

Description copied from interface: RObject

Deletes the object

Specified by:

delete in interface RObject

deleteAsync

public io.netty.util.concurrent.Future<Boolean> deleteAsync()

Description copied from interface: RObjectAsync

Delete object in async mode

Specified by:

deleteAsync in interface RObjectAsync

Returns:

true if object was deleted false if not

isExists

public boolean isExists()

Description copied from interface: RObject

Check object existence

Specified by:

isExists in interface RObject

Returns:

true if object exists and false otherwise

isExistsAsync

public io.netty.util.concurrent.Future<Boolean> isExistsAsync()

Description copied from interface: RObjectAsync

Check object existence in async mode.

Specified by:

isExistsAsync in interface RObjectAsync

Returns:

true if object exists and false otherwise