How to switch between Redis dbs?

[RickoNoNo3]

As we know Redis has a concept called db, which provides 16(by default) different storage spaces seperated from each other. I'm using 0-3 of them, and I want my Log4J2 append its logs to the 3rd.

I can't find a configuration property in this library's doc, does it supports?

[vy]

@RickoNoNo3, log4j2-redis-appender internally uses jedis, the official Java client for Redis, for interacting with Redis. There I don't see the mention of a feature similar to what you are describing. Mind providing some pointers for that feature, please?

[RickoNoNo3]

I finally find something about it in the code.

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

Lines 227 to 260 in 45c207f

	private void connect() {
	LOGGER.debug("{} connecting", logPrefix);
	int connectionTimeoutMillis = 1_000 * connectionTimeoutSeconds;
	int socketTimeoutMillis = 1_000 * socketTimeoutSeconds;
	boolean sentinel = isNotBlank(sentinelNodes);
	if (sentinel) {
	Set<String> sentinelNodesAsSet = Stream.of(sentinelNodes.split("\\s*,\\s*"))
	.filter(Strings::isNotBlank)
	.collect(Collectors.toSet());
	jedisPool = new JedisSentinelPool(
	sentinelMaster,
	sentinelNodesAsSet,
	poolConfig.getJedisPoolConfig(),
	connectionTimeoutMillis,
	socketTimeoutMillis,
	password,
	0, // database
	null); // clientName
	} else {
	jedisPool = new JedisPool(
	poolConfig.getJedisPoolConfig(),
	host,
	port,
	connectionTimeoutMillis,
	socketTimeoutMillis,
	password,
	0, // database
	null, // clientName
	false, // ssl
	null, // sslSocketFactory
	null, // sslParameters,
	null); // hostnameVerifier
	}
	}

The parameter is set to 0 (L243 and L253). It may be customizable.

[vy]

@RickoNoNo3, got it, thanks! I will try to add that.

[vy]

@RickoNoNo3, I have added database parameter to the appender in the most recent 0.11.0-SNAPSHOT release. Would you mind confirming the fix, please?

[RickoNoNo3]

Nice work! It works fine in my SpringBoot project. I also tried to fork and modify the tests of this library, the RedisAppenderTest passed in database 10. But Embedded Redis Server was not fully effective on my Mac, so other two had not past yet. I don't think it is for the Appender.

In brief, well done!

[vy]

Thanks for confirming the fix! I am trying to overhaul the project. I have one more (graceful shutdown) bug in my list to process. I will probably wrap up my work this week and cut a new release. I will let you know of the new release here via dropping a comment.

[vy]

@RickoNoNo3, I have just released 0.11.0, enjoy while it is still hot! ☕