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/**
* Copyright (c) 2013-2021 Nikita Koksharov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.redisson.api;
import java.util.concurrent.TimeUnit;
import java.util.stream.Stream;
/**
*
* @author Nikita Koksharov
*
*/
public interface RKeys extends RKeysAsync {
/**
* Get keys using iterator with defined limit.
* Keys are traversed with SCAN operation.
*
* @param limit - limit of keys amount
* @return Iterable object
*/
Iterable getKeysWithLimit(int limit);
/**
* Get keys using iterator with defined limit.
* Keys are traversed with SCAN operation.
*
* Supported glob-style patterns:
*
* h?llo subscribes to hello, hallo and hxllo
*
* h*llo subscribes to hllo and heeeello
*
* h[ae]llo subscribes to hello and hallo, but not hillo
*
* @param limit - limit of keys amount
* @param pattern - match pattern
* @return Iterable object
*/
Iterable getKeysWithLimit(String pattern, int limit);
/**
* Move object to another database
*
* @param name of object
* @param database - Redis database number
* @return true if key was moved else false
*/
boolean move(String name, int database);
/**
* Transfer object from source Redis instance to destination Redis instance
*
* @param name of object
* @param host - destination host
* @param port - destination port
* @param database - destination database
* @param timeout - maximum idle time in any moment of the communication with the destination instance in milliseconds
*/
void migrate(String name, String host, int port, int database, long timeout);
/**
* Copy object from source Redis instance to destination Redis instance
*
* @param name of object
* @param host - destination host
* @param port - destination port
* @param database - destination database
* @param timeout - maximum idle time in any moment of the communication with the destination instance in milliseconds
*/
void copy(String name, String host, int port, int database, long timeout);
/**
* Set a timeout for object. After the timeout has expired,
* the key will automatically be deleted.
*
* @param name of object
* @param timeToLive - timeout before object will be deleted
* @param timeUnit - timeout time unit
* @return true if the timeout was set and false if not
*/
boolean expire(String name, long timeToLive, TimeUnit timeUnit);
/**
* Set an expire date for object. When expire date comes
* the key will automatically be deleted.
*
* @param name of object
* @param timestamp - expire date in milliseconds (Unix timestamp)
* @return true if the timeout was set and false if not
*/
boolean expireAt(String name, long timestamp);
/**
* Clear an expire timeout or expire date for object.
*
* @param name of object
* @return true if timeout was removed
* false if object does not exist or does not have an associated timeout
*/
boolean clearExpire(String name);
/**
* Rename object with oldName to newName
* only if new key is not exists
*
* @param oldName - old name of object
* @param newName - new name of object
* @return true if object has been renamed successfully and false otherwise
*/
boolean renamenx(String oldName, String newName);
/**
* Rename current object key to newName
*
* @param currentName - current name of object
* @param newName - new name of object
*/
void rename(String currentName, String newName);
/**
* Remaining time to live of Redisson object that has a timeout
*
* @param name of key
* @return time in milliseconds
* -2 if the key does not exist.
* -1 if the key exists but has no associated expire.
*/
long remainTimeToLive(String name);
/**
* Update the last access time of an object.
*
* @param names of keys
* @return count of objects were touched
*/
long touch(String... names);
/**
* Checks if provided keys exist
*
* @param names of keys
* @return amount of existing keys
*/
long countExists(String... names);
/**
* Get Redis object type by key
*
* @param key - name of key
* @return type of key
*/
RType getType(String key);
/**
* Get hash slot identifier for key.
* Available for cluster nodes only
*
* @param key - name of key
* @return slot number
*/
int getSlot(String key);
/**
* Get all keys by pattern using iterator.
* Keys traversed with SCAN operation. Each SCAN operation loads
* up to 10 keys per request.
*
* Supported glob-style patterns:
*
* h?llo subscribes to hello, hallo and hxllo
*
* h*llo subscribes to hllo and heeeello
*
* h[ae]llo subscribes to hello and hallo, but not hillo
*
* @param pattern - match pattern
* @return Iterable object
*/
Iterable getKeysByPattern(String pattern);
/**
* Get all keys by pattern using iterator.
* Keys traversed with SCAN operation. Each SCAN operation loads
* up to count keys per request.
*
* Supported glob-style patterns:
*
* h?llo subscribes to hello, hallo and hxllo
*
* h*llo subscribes to hllo and heeeello
*
* h[ae]llo subscribes to hello and hallo, but not hillo
*
* @param pattern - match pattern
* @param count - keys loaded per request to Redis
* @return Iterable object
*/
Iterable getKeysByPattern(String pattern, int count);
/**
* Get all keys using iterator. Keys traversing with SCAN operation.
* Each SCAN operation loads up to 10 keys per request.
*
* @return Iterable object
*/
Iterable getKeys();
/**
* Get all keys using iterator. Keys traversing with SCAN operation.
* Each SCAN operation loads up to count keys per request.
*
* @param count - keys loaded per request to Redis
* @return Iterable object
*/
Iterable getKeys(int count);
/**
* Get all keys by pattern using Stream.
* Keys traversed with SCAN operation. Each SCAN operation loads
* up to 10 keys per request.
*
* Supported glob-style patterns:
*
* h?llo subscribes to hello, hallo and hxllo
*
* h*llo subscribes to hllo and heeeello
*
* h[ae]llo subscribes to hello and hallo, but not hillo
*
* @param pattern - match pattern
* @return Iterable object
*/
Stream getKeysStreamByPattern(String pattern);
/**
* Get all keys by pattern using Stream.
* Keys traversed with SCAN operation. Each SCAN operation loads
* up to count keys per request.
*
* Supported glob-style patterns:
*
* h?llo subscribes to hello, hallo and hxllo
*
* h*llo subscribes to hllo and heeeello
*
* h[ae]llo subscribes to hello and hallo, but not hillo
*
* @param pattern - match pattern
* @param count - keys loaded per request to Redis
* @return Iterable object
*/
Stream getKeysStreamByPattern(String pattern, int count);
/**
* Get all keys using Stream. Keys traversing with SCAN operation.
* Each SCAN operation loads up to 10 keys per request.
*
* @return Iterable object
*/
Stream getKeysStream();
/**
* Get all keys using Stream. Keys traversing with SCAN operation.
* Each SCAN operation loads up to count keys per request.
*
* @param count - keys loaded per request to Redis
* @return Iterable object
*/
Stream getKeysStream(int count);
/**
* Get random key
*
* @return random key
*/
String randomKey();
/**
* Delete multiple objects by a key pattern.
*
* Method executes in NON atomic way in cluster mode due to lua script limitations.
*
* Supported glob-style patterns:
* h?llo subscribes to hello, hallo and hxllo
* h*llo subscribes to hllo and heeeello
* h[ae]llo subscribes to hello and hallo, but not hillo
*
* @param pattern - match pattern
* @return number of removed keys
*/
long deleteByPattern(String pattern);
/**
* Delete multiple objects
*
* @param objects of Redisson
* @return number of removed keys
*/
long delete(RObject... objects);
/**
* Delete multiple objects by name
*
* @param keys - object names
* @return number of removed keys
*/
long delete(String... keys);
/**
* Delete multiple objects by name.
* Actual removal will happen later asynchronously.
*
* Requires Redis 4.0+
*
* @param keys of objects
* @return number of removed keys
*/
long unlink(String... keys);
/**
* Returns the number of keys in the currently-selected database
*
* @return count of keys
*/
long count();
/**
* Swap two databases.
*/
void swapdb(int db1, int db2);
/**
* Delete all keys of currently selected database
*/
void flushdb();
/**
* Delete all keys of currently selected database
* in background without blocking server.
*
* Requires Redis 4.0+
*
*/
void flushdbParallel();
/**
* Delete all keys of all existing databases
*/
void flushall();
/**
* Delete all keys of all existing databases
* in background without blocking server.
*
* Requires Redis 4.0+
*
*/
void flushallParallel();
}