A question about expiring map

[WeeeeeeeeeeS]

I use Caffeine cache in the following way:

Cache<String, GuildInfo> guilds = Caffeine.newBuilder()
        .expireAfterAccess(45, TimeUnit.MINUTES)
        .build();

How can I configure the cache so that certain entries do not expire after 45 minutes? I want some"`GuildInfo" objects to remain in the cache for a longer period (Without creating another cache object)

[ben-manes]

In that case you would use a custom expiration policy. The expireAfterAccess means it is set on creation, insert, update, or read of the entry. Here is an example where larger guilds are given more idle time before expiration.

Cache<String, GuildInfo> guilds = Caffeine.newBuilder()
    .expireAfter(new ExpiryAfterAccess<String, GuildInfo> {
        @Override public long expireAfterCreate(String key, GuildInfo guild, long currentTime) {
          return guildDuration(guild);
        }
        @Override public long expireAfterUpdate(String key, GuildInfo guild, 
            long currentTime, long currentDuration) {
          return guildDuration(guild);
        }
        @Override public long expireAfterRead(String key, GuildInfo guild, 
            long currentTime, long currentDuration) {
          return guildDuration(guild);
        }
        private long guildDuration(GuildInfo) {
          return (guild.size() < 100)
              ? TimeUnit.MINUTES.toNanos(45)
              : TimeUnit.MINUTES.toNanos(90)
        }
    }).build();