org.springframework.data.redis.connection.lettuce.LettuceReactiveClusterKeyCommands Maven / Gradle / Ivy
/*
* Copyright 2016-2018 the original author or authors.
*
* 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.springframework.data.redis.connection.lettuce;
import io.lettuce.core.RedisException;
import io.lettuce.core.api.reactive.RedisKeyReactiveCommands;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import java.nio.ByteBuffer;
import java.util.List;
import org.reactivestreams.Publisher;
import org.springframework.data.redis.RedisSystemException;
import org.springframework.data.redis.connection.ClusterSlotHashUtil;
import org.springframework.data.redis.connection.ReactiveClusterKeyCommands;
import org.springframework.data.redis.connection.ReactiveRedisConnection.BooleanResponse;
import org.springframework.data.redis.connection.RedisClusterNode;
import org.springframework.util.Assert;
/**
* @author Christoph Strobl
* @author Mark Paluch
* @since 2.0
*/
class LettuceReactiveClusterKeyCommands extends LettuceReactiveKeyCommands implements ReactiveClusterKeyCommands {
private LettuceReactiveRedisClusterConnection connection;
/**
* Create new {@link LettuceReactiveClusterKeyCommands}.
*
* @param connection must not be {@literal null}.
*/
LettuceReactiveClusterKeyCommands(LettuceReactiveRedisClusterConnection connection) {
super(connection);
this.connection = connection;
}
@Override
public Mono> keys(RedisClusterNode node, ByteBuffer pattern) {
return connection.execute(node, cmd -> {
Assert.notNull(pattern, "Pattern must not be null!");
return cmd.keys(pattern).collectList();
}).next();
}
@Override
public Mono randomKey(RedisClusterNode node) {
return connection.execute(node, RedisKeyReactiveCommands::randomkey).next();
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.connection.ReactiveRedisConnection.ReactiveKeyCommands#rename(org.reactivestreams.Publisher, java.util.function.Supplier)
*/
@Override
public Flux> rename(Publisher commands) {
return connection.execute(cmd -> Flux.from(commands).concatMap(command -> {
Assert.notNull(command.getKey(), "key must not be null.");
Assert.notNull(command.getNewName(), "NewName must not be null!");
if (ClusterSlotHashUtil.isSameSlotForAllKeys(command.getKey(), command.getNewName())) {
return super.rename(Mono.just(command));
}
Mono result = cmd.dump(command.getKey())
.switchIfEmpty(Mono.error(new RedisSystemException("Cannot rename key that does not exist",
new RedisException("ERR no such key."))))
.flatMap(value -> cmd.restore(command.getNewName(), 0, value).flatMap(res -> cmd.del(command.getKey())))
.map(LettuceConverters.longToBooleanConverter()::convert);
return result.map(val -> new BooleanResponse<>(command, val));
}));
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.connection.ReactiveRedisConnection.ReactiveKeyCommands#renameNX(org.reactivestreams.Publisher, java.util.function.Supplier)
*/
@Override
public Flux> renameNX(Publisher commands) {
return connection.execute(cmd -> Flux.from(commands).concatMap(command -> {
Assert.notNull(command.getKey(), "Key must not be null.");
Assert.notNull(command.getNewName(), "NewName must not be null!");
if (ClusterSlotHashUtil.isSameSlotForAllKeys(command.getKey(), command.getNewName())) {
return super.renameNX(Mono.just(command));
}
Mono result = cmd.exists(command.getNewName()).flatMap(exists -> {
if (exists == 1) {
return Mono.just(Boolean.FALSE);
}
return cmd.dump(command.getKey())
.switchIfEmpty(Mono.error(new RedisSystemException("Cannot rename key that does not exist",
new RedisException("ERR no such key."))))
.flatMap(value -> cmd.restore(command.getNewName(), 0, value).flatMap(res -> cmd.del(command.getKey())))
.map(LettuceConverters.longToBooleanConverter()::convert);
});
return result.map(val -> new BooleanResponse<>(command, val));
}));
}
/* (non-Javadoc)
* @see org.springframework.data.redis.connection.lettuce.LettuceReactiveKeyCommands#move(org.reactivestreams.Publisher)
*/
@Override
public Flux> move(Publisher commands) {
throw new UnsupportedOperationException("MOVE not supported in CLUSTER mode!");
}
}