/*
* Copyright 2014-2017 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.RedisClient;
import io.lettuce.core.RedisURI.Builder;
import io.lettuce.core.resource.ClientResources;
import io.lettuce.core.sentinel.api.StatefulRedisSentinelConnection;
import io.lettuce.core.sentinel.api.sync.RedisSentinelCommands;
import java.io.IOException;
import java.util.List;
import org.springframework.data.redis.ExceptionTranslationStrategy;
import org.springframework.data.redis.FallbackExceptionTranslationStrategy;
import org.springframework.data.redis.connection.NamedNode;
import org.springframework.data.redis.connection.RedisNode;
import org.springframework.data.redis.connection.RedisSentinelConnection;
import org.springframework.data.redis.connection.RedisServer;
import org.springframework.util.Assert;
/**
* @author Christoph Strobl
* @author Mark Paluch
* @since 1.5
*/
public class LettuceSentinelConnection implements RedisSentinelConnection {
private static final ExceptionTranslationStrategy EXCEPTION_TRANSLATION = new FallbackExceptionTranslationStrategy(
LettuceConverters.exceptionConverter());
private RedisClient redisClient;
private StatefulRedisSentinelConnection<String, String> connection;
/**
* Creates a {@link LettuceSentinelConnection} with a dedicated client for a supplied {@link RedisNode}.
*
* @param sentinel The sentinel to connect to.
*/
public LettuceSentinelConnection(RedisNode sentinel) {
this(sentinel.getHost(), sentinel.getPort());
}
/**
* Creates a {@link LettuceSentinelConnection} with a client for the supplied {@code host} and {@code port}.
*
* @param host must not be {@literal null}.
* @param port sentinel port.
*/
public LettuceSentinelConnection(String host, int port) {
Assert.notNull(host, "Cannot create LettuceSentinelConnection using 'null' as host.");
redisClient = RedisClient.create(Builder.redis(host, port).build());
init();
}
/**
* Creates a {@link LettuceSentinelConnection} with a client for the supplied {@code host} and {@code port} and reuse
* existing {@link ClientResources}.
*
* @param host must not be {@literal null}.
* @param port sentinel port.
* @param clientResources must not be {@literal null}.
*/
public LettuceSentinelConnection(String host, int port, ClientResources clientResources) {
Assert.notNull(clientResources, "Cannot create LettuceSentinelConnection using 'null' as ClientResources.");
Assert.notNull(host, "Cannot create LettuceSentinelConnection using 'null' as host.");
redisClient = RedisClient.create(clientResources, Builder.redis(host, port).build());
init();
}
/**
* Creates a {@link LettuceSentinelConnection} using a supplied {@link RedisClient}.
*
* @param redisClient
*/
public LettuceSentinelConnection(RedisClient redisClient) {
Assert.notNull(redisClient, "Cannot create LettuceSentinelConnection using 'null' as client.");
this.redisClient = redisClient;
init();
}
/**
* Creates a {@link LettuceSentinelConnection} using a supplied redis connection.
*
* @param connection native Lettuce connection, must not be {@literal null}
*/
protected LettuceSentinelConnection(StatefulRedisSentinelConnection<String, String> connection) {
Assert.notNull(connection, "Cannot create LettuceSentinelConnection using 'null' as connection.");
this.connection = connection;
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.connection.RedisSentinelCommands#failover(org.springframework.data.redis.connection.NamedNode)
*/
@Override
public void failover(NamedNode master) {
Assert.notNull(master, "Redis node master must not be 'null' for failover.");
Assert.hasText(master.getName(), "Redis master name must not be 'null' or empty for failover.");
getSentinelCommands().failover(master.getName());
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.connection.RedisSentinelCommands#masters()
*/
@Override
public List<RedisServer> masters() {
try {
return LettuceConverters.toListOfRedisServer(getSentinelCommands().masters());
} catch (Exception e) {
throw EXCEPTION_TRANSLATION.translate(e);
}
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.connection.RedisSentinelCommands#slaves(org.springframework.data.redis.connection.NamedNode)
*/
@Override
public List<RedisServer> slaves(NamedNode master) {
Assert.notNull(master, "Master node cannot be 'null' when loading slaves.");
return slaves(master.getName());
}
/**
* @param masterName
* @see org.springframework.data.redis.connection.RedisSentinelCommands#slaves(org.springframework.data.redis.connection.NamedNode)
* @return
*/
public List<RedisServer> slaves(String masterName) {
Assert.hasText(masterName, "Name of redis master cannot be 'null' or empty when loading slaves.");
try {
return LettuceConverters.toListOfRedisServer(getSentinelCommands().slaves(masterName));
} catch (Exception e) {
throw EXCEPTION_TRANSLATION.translate(e);
}
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.connection.RedisSentinelCommands#remove(org.springframework.data.redis.connection.NamedNode)
*/
@Override
public void remove(NamedNode master) {
Assert.notNull(master, "Master node cannot be 'null' when trying to remove.");
remove(master.getName());
}
/**
* @param masterName
* @see org.springframework.data.redis.connection.RedisSentinelCommands#remove(org.springframework.data.redis.connection.NamedNode)
*/
public void remove(String masterName) {
Assert.hasText(masterName, "Name of redis master cannot be 'null' or empty when trying to remove.");
getSentinelCommands().remove(masterName);
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.connection.RedisSentinelCommands#monitor(org.springframework.data.redis.connection.RedisServer)
*/
@Override
public void monitor(RedisServer server) {
Assert.notNull(server, "Cannot monitor 'null' server.");
Assert.hasText(server.getName(), "Name of server to monitor must not be 'null' or empty.");
Assert.hasText(server.getHost(), "Host must not be 'null' for server to monitor.");
Assert.notNull(server.getPort(), "Port must not be 'null' for server to monitor.");
Assert.notNull(server.getQuorum(), "Quorum must not be 'null' for server to monitor.");
getSentinelCommands().monitor(server.getName(), server.getHost(), server.getPort().intValue(),
server.getQuorum().intValue());
}
/*
* (non-Javadoc)
* @see java.io.Closeable#close()
*/
@Override
public void close() throws IOException {
connection.close();
connection = null;
if (redisClient != null) {
redisClient.shutdown();
}
}
private void init() {
if (connection == null) {
connection = connectSentinel();
}
}
private RedisSentinelCommands<String, String> getSentinelCommands() {
return connection.sync();
}
private StatefulRedisSentinelConnection<String, String> connectSentinel() {
return redisClient.connectSentinel();
}
@Override
public boolean isOpen() {
return connection != null && connection.isOpen();
}
}