Small preparations for the release.

Author: vy

CHANGELOG.md

@@ -1,3 +1,7 @@
+### (2020-10-06) v0.8
+
+- Added Redis [Sentinel](https://redis.io/topics/sentinel) support. (#9)
+
 ### (2019-07-23) v0.7
 
 - Remove Guava dependency by copying the `RateLimiter`.

README.md

@@ -58,15 +58,21 @@ Below you can find a sample `log4j2.xml` snippet employing `RedisAppender`.
 </Configuration>
 ```
 
-If you have Sentinel cluster please configure RedisAppender like this:
+One can make `RedisAppender` work against a
+[sentinel](https://redis.io/topics/sentinel) setup using `sentinelNodes` and
+`sentinelMaster` parameters:
+
 ```xml
 <RedisAppender name="REDIS"
                key="log4j2-messages"
                sentinelNodes="localhost:63791,localhost:63792"
                sentinelMaster="mymaster">
 ...
 </RedisAppender>
-```   
+```
+
+Note that `sentinelNodes` and `sentinelMaster` have priority over `host` and
+`port` parameters.
 
 `RedisAppender` is configured with the following parameters:
 
@@ -76,8 +82,8 @@ If you have Sentinel cluster please configure RedisAppender like this:
 | `key` | String | | Redis queue key |
 | `host` | String | `localhost` | Redis host|
 | `port` | int | 6379 | Redis port |
-| `sentinelNodes` | String | `localhost:63791,localhost:63792` | Redis sentinel nodes as comma-separated list. If specified, `host` and `port` parameters are ignored. |
-| `sentinelMaster` | String | `mymaster` | Redis sentinel master name |
+| `sentinelNodes` | String | `null` | Redis sentinel nodes as comma-separated list, e.g., `host1:port1,host2:port2`. If specified, `host` and `port` parameters are ignored. |
+| `sentinelMaster` | String | `null` | Redis sentinel master name |
 | `password` | String | `null` | Redis password |
 | `connectionTimeoutSeconds` | int | 2 | initial connection timeout in seconds |
 | `socketTimeoutSeconds` | int | 2 | socket timeout in seconds |
@@ -225,7 +231,7 @@ Contributors
 
 # License
 
-Copyright &copy; 2017-2019 [Volkan Yazıcı](http://vlkan.com/)
+Copyright &copy; 2017-2020 [Volkan Yazıcı](http://vlkan.com/)
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.

appender/src/main/java/com/vlkan/log4j2/redis/appender/RedisAppender.java

@@ -24,6 +24,7 @@
 
 import java.io.Serializable;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.util.Set;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
@@ -296,7 +297,7 @@ public static class Builder implements org.apache.logging.log4j.core.util.Builde
         private String name;
 
         @PluginBuilderAttribute
-        private Charset charset = Charset.forName("UTF-8");
+        private Charset charset = StandardCharsets.UTF_8;
 
         @PluginElement("Layout")
         private Layout<? extends Serializable> layout = PatternLayout.newBuilder().withCharset(charset).build();

appender/src/main/java/com/vlkan/log4j2/redis/appender/RedisThrottler.java

@@ -76,8 +76,9 @@ private ObjectName createJmxBeanName() {
         String beanName = config.getJmxBeanName();
         if (beanName == null) {
             LoggerContext loggerContext = appender.getConfig().getLoggerContext();
-            if (loggerContext == null)
+            if (loggerContext == null) {
                 loggerContext = (LoggerContext) LogManager.getContext(false);
+            }
             beanName = String.format(
                     "org.apache.logging.log4j2:type=%s,component=Appenders,name=%s,subtype=RedisThrottler",
                     loggerContext.getName(),