How to get all Keys from Redis using redis template

Question

I have been stuck with this problem with quite some time.I want to get keys from redis using redis template. I tried this.redistemplate.keys(\"*\"); but this doesn\'t fetch

Answer 1

Avoid to use keys command. It may ruin performance when it is executed against large databases.

You should use scan command instead. Here is how you can do it:

RedisConnection redisConnection = null;
try {
    redisConnection = redisTemplate.getConnectionFactory().getConnection();
    ScanOptions options = ScanOptions.scanOptions().match("myKey*").count(100).build();

    Cursor c = redisConnection.scan(options);
    while (c.hasNext()) {
        logger.info(new String((byte[]) c.next()));
    }
} finally {
    redisConnection.close(); //Ensure closing this connection.
}

or do it much simplier with Redisson Redis Java client:

Iterable keysIterator = redisson.getKeys().getKeysByPattern("test*", 100);
for (String key : keysIterator) {
    logger.info(key);
}