# redis-replicator
**Repository Path**: leonchen83/redis-replicator
## Basic Information
- **Project Name**: redis-replicator
- **Description**: Redis-replicator是一款用java写的redis rdb以及命令解析软件.它可以实时解析,过滤,广播rdb以及command事件,支持redis2.6-7.2,支持psync,sync,psync2三种同步协议.
- **Primary Language**: Java
- **License**: Apache-2.0
- **Default Branch**: master
- **Homepage**: https://github.com/leonchen83/redis-replicator
- **GVP Project**: No
## Statistics
- **Stars**: 141
- **Forks**: 48
- **Created**: 2016-08-27
- **Last Updated**: 2025-09-03
## Categories & Tags
**Categories**: database-dev
**Tags**: None
## README
Table of Contents([中文说明](./README.zh_CN.md))
=================
* [1. Redis-replicator](#1-redis-replicator)
* [1.1. Brief introduction](#11-brief-introduction)
* [1.2. Chat with author](#12-chat-with-author)
* [1.3. Contract the author](#13-contract-the-author)
* [2. Install](#2-install)
* [2.1. Requirements](#21-requirements)
* [2.2. Maven dependency](#22-maven-dependency)
* [2.3. Install from source code](#23-install-from-source-code)
* [2.4. Select a version](#24-select-a-version)
* [3. Simple usage](#3-simple-usage)
* [3.1. Usage](#31-usage)
* [3.2. Backup remote rdb snapshot](#32-backup-remote-rdb-snapshot)
* [3.3. Backup remote commands](#33-backup-remote-commands)
* [3.4. Convert rdb to dump format](#34-convert-rdb-to-dump-format)
* [3.5. Rdb check](#35-rdb-check)
* [3.6. Scan and PSYNC](#36-scan-and-psync)
* [3.7. Other examples](#37-other-examples)
* [4. Advanced topics](#4-advanced-topics)
* [4.1. Command extension](#41-command-extension)
* [4.1.1. Write a command](#411-write-a-command)
* [4.1.2. Write a command parser](#412-write-a-command-parser)
* [4.1.3. Register this parser](#413-register-this-parser)
* [4.1.4. Handle command event](#414-handle-command-event)
* [4.1.5. Put them together](#415-put-them-together)
* [4.2. Module extension](#42-module-extension)
* [4.2.1. Compile redis test modules](#421-compile-redis-test-modules)
* [4.2.2. Open comment in redis.conf](#422-open-comment-in-redisconf)
* [4.2.3. Write a module parser](#423-write-a-module-parser)
* [4.2.4. Write a command parser](#424-write-a-command-parser)
* [4.2.5. Register this module parser and command parser and handle event](#425-register-this-module-parser-and-command-parser-and-handle-event)
* [4.2.6. Put them together](#426-put-them-together)
* [4.3. Stream](#43-stream)
* [4.4. Write your own rdb parser](#44-write-your-own-rdb-parser)
* [4.5. Redis URI](#45-redis-uri)
* [5. Other topics](#5-other-topics)
* [5.1. Built-in command parser](#51-built-in-command-parser)
* [5.2. EOFException](#52-eofexception)
* [5.3. Trace event log](#53-trace-event-log)
* [5.4. SSL connection](#54-ssl-connection)
* [5.5. Auth](#55-auth)
* [5.6. Avoid full sync](#56-avoid-full-sync)
* [5.7. Lifecycle event](#57-lifecycle-event)
* [5.8. Handle huge key value pair](#58-handle-huge-key-value-pair)
* [5.9. Redis6 support](#59-redis6-support)
* [5.9.1. SSL support](#591-ssl-support)
* [5.9.2. ACL support](#592-acl-support)
* [5.10. Redis7 support](#510-redis7-support)
* [5.10.1. Function](#5101-function)
* [5.11. Redis7.4 support](#511-redis74-support)
* [5.11.1. TTL Hash](#5111-ttl-hash)
* [6. Contributors](#6-contributors)
* [7. Consulting](#7-consulting)
* [8. References](#8-references)
* [9. Supported by](#9-supported-by)
* [9.1. 宁文君](#91-宁文君)
* [9.2. YourKit](#92-yourkit)
* [9.3. IntelliJ IDEA](#93-intellij-idea)
* [9.4. Redisson](#94-redisson)
# 1. Redis-replicator
## 1.1. Brief introduction
[](https://github.com/leonchen83/redis-replicator/actions/workflows/maven.yml)
[](https://coveralls.io/github/leonchen83/redis-replicator?branch=master)
[](https://maven-badges.herokuapp.com/maven-central/com.moilioncircle/redis-replicator)
[](http://www.javadoc.io/doc/com.moilioncircle/redis-replicator)
[](https://github.com/leonchen83/redis-replicator/blob/master/LICENSE)
[](./ANTI-996-LICENSE)
Redis Replicator implement Redis Replication protocol written in java. It can parse, filter, broadcast the RDB and AOF events in a real time manner. It also can synchronize redis data to your local cache or to database. The following I mentioned `Command` which means `Writable Command`(e.g. `set`,`hmset`) in Redis and excludes the `Readable Command`(e.g. `get`,`hmget`), Supported redis-8.0.x and former redis versions.
## 1.2. Chat with author
[](https://gitter.im/leonchen83/redis-replicator?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
## 1.3. Contract the author
**chen.bao.yi@gmail.com**
# 2. Install
## 2.1. Requirements
compile minimal jdk 9+
runtime minimal jdk 8+
maven-3.3.1+
redis 2.6 - 7.0
## 2.2. Maven dependency
```xml
com.moilioncircle
redis-replicator
3.9.0
```
## 2.3. Install from source code
```
step 1: install jdk-11.0.x for compile
step 2: git clone https://github.com/leonchen83/redis-replicator.git
step 3: $cd ./redis-replicator
step 4: $mvn clean install package -DskipTests
```
## 2.4. Select a version
| **redis version** | **redis-replicator version** |
|--------------------|------------------------------|
| \[2.6, 8.0.x\] | \[3.9.0, \] |
| \[2.6, 7.2.x\] | \[3.8.0, 3.8.1\] |
| \[2.6, 7.0.x\] | \[3.6.4, 3.7.0\] |
| \[2.6, 7.0.x-RC2\] | \[3.6.2, 3.6.3\] |
| \[2.6, 7.0.0-RC1\] | \[3.6.0, 3.6.1\] |
| \[2.6, 6.2.x\] | \[3.5.2, 3.5.5\] |
| \[2.6, 6.2.0-RC1\] | \[3.5.0, 3.5.1\] |
| \[2.6, 6.0.x\] | \[3.4.0, 3.4.4\] |
| \[2.6, 5.0.x\] | \[2.6.1, 3.3.3\] |
| \[2.6, 4.0.x\] | \[2.3.0, 2.5.0\] |
| \[2.6, 4.0-RC3\] | \[2.1.0, 2.2.0\] |
| \[2.6, 3.2.x\] | \[1.0.18\](not supported) |
# 3. Simple usage
## 3.1. Usage
```java
Replicator replicator = new RedisReplicator("redis://127.0.0.1:6379");
replicator.addEventListener(new EventListener() {
@Override
public void onEvent(Replicator replicator, Event event) {
if (event instanceof KeyStringValueString) {
KeyStringValueString kv = (KeyStringValueString) event;
System.out.println(new String(kv.getKey()));
System.out.println(new String(kv.getValue()));
} else {
....
}
}
});
replicator.open();
```
## 3.2. Backup remote rdb snapshot
See [RdbBackupExample.java](./examples/com/moilioncircle/examples/backup/RdbBackupExample.java)
## 3.3. Backup remote commands
See [CommandBackupExample.java](./examples/com/moilioncircle/examples/backup/CommandBackupExample.java)
## 3.4. Convert rdb to dump format
We can use `DumpRdbVisitor` to convert rdb to redis [DUMP](https://redis.io/commands/dump) format.
```java
Replicator r = new RedisReplicator("redis:///path/to/dump.rdb");
r.setRdbVisitor(new DumpRdbVisitor(r));
r.addEventListener(new EventListener() {
@Override
public void onEvent(Replicator replicator, Event event) {
if (!(event instanceof DumpKeyValuePair)) return;
DumpKeyValuePair dkv = (DumpKeyValuePair) event;
byte[] serialized = dkv.getValue();
// we can use redis RESTORE command to migrate this serialized value to another redis.
}
});
r.open();
```
## 3.5. Rdb check
We can use `SkipRdbVisitor` to check rdb's correctness.
```java
Replicator r = new RedisReplicator("redis:///path/to/dump.rdb");
r.setRdbVisitor(new SkipRdbVisitor(r));
r.open();
```
## 3.6. Scan and PSYNC
By default, redis-replicator uses PSYNC to pretend as slave to receives commands. examples like following
```java
Replicator r = new RedisReplicator("redis://127.0.0.1:6379");
r.addEventListener(new EventListener() {
@Override
public void onEvent(Replicator replicator, Event event) {
System.out.println(event);
}
});
r.open();
```
However, under some cloud services, the PSYNC command is prohibited, so we use the Scan command instead of the PSYNC command
```java
Replicator r = new RedisReplicator("redis://127.0.0.1:6379?enableScan=yes&scanStep=256");
r.addEventListener(new EventListener() {
@Override
public void onEvent(Replicator replicator, Event event) {
System.out.println(event);
}
});
r.open();
```
## 3.7. Other examples
See [examples](./examples/com/moilioncircle/examples/README.md)
# 4. Advanced topics
## 4.1. Command extension
### 4.1.1. Write a command
```java
@CommandSpec(command = "APPEND")
public static class YourAppendCommand extends AbstractCommand {
private final String key;
private final String value;
public YourAppendCommand(String key, String value) {
this.key = key;
this.value = value;
}
public String getKey() {
return key;
}
public String getValue() {
return value;
}
}
```
### 4.1.2. Write a command parser
```java
public class YourAppendParser implements CommandParser {
@Override
public YourAppendCommand parse(Object[] command) {
return new YourAppendCommand(new String((byte[]) command[1], UTF_8), new String((byte[]) command[2], UTF_8));
}
}
```
### 4.1.3. Register this parser
```java
Replicator replicator = new RedisReplicator("redis://127.0.0.1:6379");
replicator.addCommandParser(CommandName.name("APPEND"),new YourAppendParser());
```
### 4.1.4. Handle command event
```java
replicator.addEventListener(new EventListener() {
@Override
public void onEvent(Replicator replicator, Event event) {
if(event instanceof YourAppendCommand){
YourAppendCommand appendCommand = (YourAppendCommand)event;
// your code goes here
}
}
});
```
### 4.1.5. Put them together
See [CommandExtensionExample.java](./examples/com/moilioncircle/examples/extension/CommandExtensionExample.java)
## 4.2. Module extension
### 4.2.1. Compile redis test modules
```java
$cd /path/to/redis-4.0-rc2/src/modules
$make
```
### 4.2.2. Open comment in redis.conf
```java
loadmodule /path/to/redis-4.0-rc2/src/modules/hellotype.so
```
### 4.2.3. Write a module parser
```java
public class HelloTypeModuleParser implements ModuleParser {
@Override
public HelloTypeModule parse(RedisInputStream in, int version) throws IOException {
DefaultRdbModuleParser parser = new DefaultRdbModuleParser(in);
int elements = parser.loadUnsigned(version).intValue();
long[] ary = new long[elements];
int i = 0;
while (elements-- > 0) {
ary[i++] = parser.loadSigned(version);
}
return new HelloTypeModule(ary);
}
}
public class HelloTypeModule implements Module {
private final long[] value;
public HelloTypeModule(long[] value) {
this.value = value;
}
public long[] getValue() {
return value;
}
}
```
### 4.2.4. Write a command parser
```java
public class HelloTypeParser implements CommandParser {
@Override
public HelloTypeCommand parse(Object[] command) {
String key = new String((byte[]) command[1], Constants.UTF_8);
long value = Long.parseLong(new String((byte[]) command[2], Constants.UTF_8));
return new HelloTypeCommand(key, value);
}
}
@CommandSpec(command = "hellotype.insert")
public class HelloTypeCommand extends AbstractCommand {
private final String key;
private final long value;
public long getValue() {
return value;
}
public String getKey() {
return key;
}
public HelloTypeCommand(String key, long value) {
this.key = key;
this.value = value;
}
}
```
### 4.2.5. Register this module parser and command parser and handle event
```java
public static void main(String[] args) throws IOException {
Replicator replicator = new RedisReplicator("redis://127.0.0.1:6379");
replicator.addCommandParser(CommandName.name("hellotype.insert"), new HelloTypeParser());
replicator.addModuleParser("hellotype", 0, new HelloTypeModuleParser());
replicator.addEventListener(new EventListener() {
@Override
public void onEvent(Replicator replicator, Event event) {
if (event instanceof KeyStringValueModule) {
System.out.println(event);
}
if (event instanceof HelloTypeCommand) {
System.out.println(event);
}
}
});
replicator.open();
}
```
### 4.2.6. Put them together
See [ModuleExtensionExample.java](./examples/com/moilioncircle/examples/extension/ModuleExtensionExample.java)
## 4.3. Stream
Since Redis 5.0+, Redis add a new data structure `STREAM`. Redis-replicator parse the `STREAM` like the following:
```java
Replicator r = new RedisReplicator("redis://127.0.0.1:6379");
r.addEventListener(new EventListener() {
@Override
public void onEvent(Replicator replicator, Event event) {
if (event instanceof KeyStringValueStream) {
KeyStringValueStream kv = (KeyStringValueStream)event;
// key
String key = kv.getKey();
// stream
Stream stream = kv.getValueAsStream();
// last stream id
stream.getLastId();
// entries
NavigableMap entries = stream.getEntries();
// optional : group
for (Stream.Group group : stream.getGroups()) {
// group PEL(pending entries list)
NavigableMap gpel = group.getPendingEntries();
// consumer
for (Stream.Consumer consumer : group.getConsumers()) {
// consumer PEL(pending entries list)
NavigableMap cpel = consumer.getPendingEntries();
}
}
}
}
});
r.open();
```
## 4.4. Write your own rdb parser
* Write `YourRdbVisitor` extends `RdbVisitor`
* Register your `RdbVisitor` to `Replicator` using `setRdbVisitor` method.
## 4.5. Redis URI
Before redis-replicator-2.4.0, We construct `RedisReplicator` like the following:
```java
Replicator replicator = new RedisReplicator("127.0.0.1", 6379, Configuration.defaultSetting());
Replicator replicator = new RedisReplicator(new File("/path/to/dump.rdb", FileType.RDB, Configuration.defaultSetting());
Replicator replicator = new RedisReplicator(new File("/path/to/appendonly.aof", FileType.AOF, Configuration.defaultSetting());
Replicator replicator = new RedisReplicator(new File("/path/to/appendonly.aof", FileType.MIXED, Configuration.defaultSetting());
```
After redis-replicator-2.4.0, We introduced a new concept(Redis URI) which simplify the construction process of `RedisReplicator`.
```java
Replicator replicator = new RedisReplicator("redis://127.0.0.1:6379");
Replicator replicator = new RedisReplicator("redis:///path/to/dump.rdb");
Replicator replicator = new RedisReplicator("redis:///path/to/appendonly.aof");
// configuration setting example
Replicator replicator = new RedisReplicator("redis://127.0.0.1:6379?authPassword=foobared&readTimeout=10000&ssl=yes");
Replicator replicator = new RedisReplicator("redis:///path/to/dump.rdb?rateLimit=1000000");
Replicator replicator = new RedisReplicator("rediss://user:pass@127.0.0.1:6379?rateLimit=1000000");
```
# 5. Other topics
## 5.1. Built-in command parser
| **commands** |**commands** | **commands** | **commands** | **commands** | **commands** |
|--------------| -------------- |--------------------|--------------|---------------|----------------------|
| **PING** | **APPEND** | **SET** | **SETEX** | **MSET** | **DEL** |
| **SADD** | **HMSET** | **HSET** | **LSET** | **EXPIRE** | **EXPIREAT** |
| **GETSET** | **HSETNX** | **MSETNX** | **PSETEX** | **SETNX** | **SETRANGE** |
| **HDEL** | **UNLINK** | **SREM** | **LPOP** | **LPUSH** | **LPUSHX** |
| **LRem** | **RPOP** | **RPUSH** | **RPUSHX** | **ZREM** | **ZINTERSTORE** |
| **INCR** | **DECR** | **INCRBY** | **PERSIST** | **SELECT** | **FLUSHALL** |
| **FLUSHDB** | **HINCRBY** | **ZINCRBY** | **MOVE** | **SMOVE** | **BRPOPLPUSH** |
| **PFCOUNT** | **PFMERGE** | **SDIFFSTORE** | **RENAMENX** | **PEXPIREAT** | **SINTERSTORE** |
| **ZADD** | **BITFIELD** | **SUNIONSTORE** | **RESTORE** | **LINSERT** | **ZREMRANGEBYLEX** |
| **GEOADD** | **PEXPIRE** | **ZUNIONSTORE** | **EVAL** | **SCRIPT** | **ZREMRANGEBYRANK** |
| **PUBLISH** | **BITOP** | **SETBIT** | **SWAPDB** | **PFADD** | **ZREMRANGEBYSCORE** |
| **RENAME** | **MULTI** | **EXEC** | **LTRIM** | **RPOPLPUSH** | **SORT** |
| **EVALSHA** | **ZPOPMAX** | **ZPOPMIN** | **XACK** | **XADD** | **XCLAIM** |
| **XDEL** | **XGROUP** | **XTRIM** | **XSETID** | **COPY** | **LMOVE** |
| **BLMOVE** | **ZDIFFSTORE** | **GEOSEARCHSTORE** | **FUNCTION** | **SPUBLISH** | **HPERSIST** |
| **HSETEX** | **HPEXPIREAT** | | | | |
## 5.2. EOFException
* Adjust redis server setting like the following. more details please refer to [redis.conf](https://raw.githubusercontent.com/antirez/redis/3.0/redis.conf)
```java
client-output-buffer-limit slave 0 0 0
```
**WARNNING: this setting may run out of memory of redis server in some cases.**
## 5.3. Trace event log
* Set log level to **debug**
* If you are using log4j2, add logger like the following:
```xml
```
```java
Configuration.defaultSetting().setVerbose(true);
// redis uri
"redis://127.0.0.1:6379?verbose=yes"
```
## 5.4. SSL connection
```java
System.setProperty("javax.net.ssl.keyStore", "/path/to/keystore");
System.setProperty("javax.net.ssl.keyStorePassword", "password");
System.setProperty("javax.net.ssl.keyStoreType", "your_type");
System.setProperty("javax.net.ssl.trustStore", "/path/to/truststore");
System.setProperty("javax.net.ssl.trustStorePassword", "password");
System.setProperty("javax.net.ssl.trustStoreType", "your_type");
Configuration.defaultSetting().setSsl(true);
// optional setting
Configuration.defaultSetting().setSslSocketFactory(sslSocketFactory);
Configuration.defaultSetting().setSslParameters(sslParameters);
Configuration.defaultSetting().setHostnameVerifier(hostnameVerifier);
// redis uri
"redis://127.0.0.1:6379?ssl=yes"
"rediss://127.0.0.1:6379"
```
## 5.5. Auth
```java
Configuration.defaultSetting().setAuthUser("default");
Configuration.defaultSetting().setAuthPassword("foobared");
// redis uri
"redis://127.0.0.1:6379?authPassword=foobared&authUser=default"
"redis://default:foobared@127.0.0.1:6379"
```
## 5.6. Avoid full sync
* Adjust redis server setting like the following
```java
repl-backlog-size
repl-backlog-ttl
repl-ping-slave-periods
```
`repl-ping-slave-period` **MUST** less than `Configuration.getReadTimeout()`, default `Configuration.getReadTimeout()` is 60 seconds
## 5.7. Lifecycle event
```java
Replicator replicator = new RedisReplicator("redis://127.0.0.1:6379");
final long start = System.currentTimeMillis();
final AtomicInteger acc = new AtomicInteger(0);
replicator.addEventListener(new EventListener() {
@Override
public void onEvent(Replicator replicator, Event event) {
if(event instanceof PreRdbSyncEvent) {
System.out.println("pre rdb sync");
} else if(event instanceof PostRdbSyncEvent) {
long end = System.currentTimeMillis();
System.out.println("time elapsed:" + (end - start));
System.out.println("rdb event count:" + acc.get());
} else {
acc.incrementAndGet();
}
}
});
replicator.open();
```
## 5.8. Handle huge key value pair
According to [4.3. Write your own rdb parser](#43-write-your-own-rdb-parser), This tool built in an [Iterable Rdb Parser](./src/main/java/com/moilioncircle/redis/replicator/rdb/iterable/ValueIterableRdbVisitor.java) so that handle huge key value pair.
More details please refer to:
[1] [HugeKVFileExample.java](./examples/com/moilioncircle/examples/huge/HugeKVFileExample.java)
[2] [HugeKVSocketExample.java](./examples/com/moilioncircle/examples/huge/HugeKVSocketExample.java)
## 5.9. Redis6 support
### 5.9.1. SSL support
```
$cd /path/to/redis
$./utils/gen-test-certs.sh
$cd tests/tls
$openssl pkcs12 -export -CAfile ca.crt -in redis.crt -inkey redis.key -out redis.p12
$cd /path/to/redis
$./src/redis-server --tls-port 6379 --port 0 --tls-cert-file ./tests/tls/redis.crt \
--tls-key-file ./tests/tls/redis.key --tls-ca-cert-file ./tests/tls/ca.crt \
--tls-replication yes --bind 0.0.0.0 --protected-mode no
System.setProperty("javax.net.ssl.keyStore", "/path/to/redis/tests/tls/redis.p12");
System.setProperty("javax.net.ssl.keyStorePassword", "password");
System.setProperty("javax.net.ssl.keyStoreType", "pkcs12");
System.setProperty("javax.net.ssl.trustStore", "/path/to/redis/tests/tls/redis.p12");
System.setProperty("javax.net.ssl.trustStorePassword", "password");
System.setProperty("javax.net.ssl.trustStoreType", "pkcs12");
Replicator replicator = new RedisReplicator("rediss://127.0.0.1:6379");
```
If you don't want to use `System.setProperty` you can programing as following
```java
RedisSslContextFactory factory = new RedisSslContextFactory();
factory.setKeyStorePath("/path/to/redis/tests/tls/redis.p12");
factory.setKeyStoreType("pkcs12");
factory.setKeyStorePassword("password");
factory.setTrustStorePath("/path/to/redis/tests/tls/redis.p12");
factory.setTrustStoreType("pkcs12");
factory.setTrustStorePassword("password");
SslConfiguration ssl = SslConfiguration.defaultSetting().setSslContextFactory(factory);
Replicator replicator = new RedisReplicator("rediss://127.0.0.1:6379", ssl);
```
### 5.9.2. ACL support
```java
Replicator replicator = new RedisReplicator("redis://user:pass@127.0.0.1:6379");
```
## 5.10. Redis7 support
### 5.10.1. Function
Since redis 7.0 add `function` support. and `function` structure stored in rdb file. we can use following method to parse `function`.
```java
Replicator replicator = new RedisReplicator("redis://127.0.0.1:6379");
replicator.addEventListener(new EventListener() {
@Override
public void onEvent(Replicator replicator, Event event) {
if (event instanceof Function) {
Function function = (Function) event;
function.getCode();
// your code goes here
}
}
});
replicator.open();
```
you can also parse `function` to `serialized` data so that use `FUNCTION RESTORE` to restore `serialized` data to target redis
```java
Replicator replicator = new RedisReplicator("redis://127.0.0.1:6379");
replicator.setRdbVisitor(new DumpRdbVisitor(replicator));
replicator.addEventListener(new EventListener() {
@Override
public void onEvent(Replicator replicator, Event event) {
if (event instanceof DumpFunction) {
DumpFunction function = (DumpFunction) event;
byte[] serialized = function.getSerialized();
// your code goes here
// you can use FUNCTION RESTORE to restore above serialized data to target redis
}
}
});
replicator.open();
```
## 5.11. Redis7.4 support
### 5.11.1. TTL Hash
Since redis 7.4 add `ttl hash` support. and `ttl hash` structure stored in rdb file. we can use following method to parse `ttl hash`.
```java
Replicator replicator = new RedisReplicator("redis://127.0.0.1:6379");
replicator.addEventListener(new EventListener() {
@Override
public void onEvent(Replicator replicator, Event event) {
if (event instanceof KeyStringValueTTLHash) {
KeyStringValueTTLHash skv = (KeyStringValueTTLHash) event;
// key
byte[] key = skv.getKey();
// ttl hash
Map ttlHash = skv.getValue();
for (Map.Entry entry : ttlHash.entrySet()) {
System.out.println("field:" + Strings.toString(entry.getKey()));
System.out.println("value:" + Strings.toString(entry.getValue().getValue()));
System.out.println("field ttl:" + entry.getValue().getExpires());
}
}
}
});
replicator.open();
```
# 6. Contributors
* [Leon Chen](https://github.com/leonchen83)
* [Adrian Yao](https://github.com/adrianyao89)
* [Trydofor](https://github.com/trydofor)
* [Argun](https://github.com/Argun)
* [Sean Pan](https://github.com/XinYang-Pan)
* [René Kerner](https://github.com/rk3rn3r)
* [Maplestoria](https://github.com/maplestoria)
* Special thanks to [Kevin Zheng](https://github.com/KevinZheng001)
# 7 Consulting
Commercial support for `redis-replicator` is available. The following services are currently available:
* Onsite consulting. $10,000 per day
* Onsite training. $10,000 per day
You may also contact Baoyi Chen directly, mail to [chen.bao.yi@gmail.com](mailto:chen.bao.yi@gmail.com).
# 8. References
* [rdb.c](https://github.com/antirez/redis/blob/unstable/src/rdb.c)
* [Redis RDB File Format](https://github.com/leonchen83/redis-replicator/wiki/RDB-dump-data-format)
* [Redis Protocol specification](http://redis.io/topics/protocol)
* [Redis Replication](http://redis.io/topics/replication)
* [Redis-replicator Design and Implementation](https://github.com/leonchen83/mycode/blob/master/redis/redis-share/Redis-replicator%E8%AE%BE%E8%AE%A1%E4%B8%8E%E5%AE%9E%E7%8E%B0.md)
# 9. Supported by
## 9.1. 宁文君
27 January 2023, A sad day that I lost my mother 宁文君, She was encouraging and supporting me in developing this tool. Every time a company uses this tool, she got excited like a child and encouraged me to keep going.
Without her I couldn't have maintained this tool for so many years. Even I didn't achieve much but she is still proud of me, R.I.P and hope God bless her.
## 9.2. YourKit
YourKit is kindly supporting this open source project with its full-featured Java Profiler.
YourKit, LLC is the creator of innovative and intelligent tools for profiling
Java and .NET applications. Take a look at YourKit's leading software products:
YourKit Java Profiler and
YourKit .NET Profiler.
## 9.3. IntelliJ IDEA
[IntelliJ IDEA](https://www.jetbrains.com/?from=redis-replicator) is a Java integrated development environment (IDE) for developing computer software.
It is developed by JetBrains (formerly known as IntelliJ), and is available as an Apache 2 Licensed community edition,
and in a proprietary commercial edition. Both can be used for commercial development.
## 9.4. Redisson
[Redisson](https://github.com/redisson/redisson) is Redis based In-Memory Data Grid for Java offers distributed objects and services (`BitSet`, `Set`, `Multimap`, `SortedSet`, `Map`, `List`, `Queue`, `BlockingQueue`, `Deque`, `BlockingDeque`, `Semaphore`, `Lock`, `AtomicLong`, `CountDownLatch`, `Publish / Subscribe`, `Bloom filter`, `Remote service`, `Spring cache`, `Executor service`, `Live Object service`, `Scheduler service`) backed by Redis server. Redisson provides more convenient and easiest way to work with Redis. Redisson objects provides a separation of concern, which allows you to keep focus on the data modeling and application logic.