Returns a function which accepts an event and sends it to logstash. Silently drops events when logstash is down. Attempts to reconnect automatically every five seconds. Use:

(logstash {:host “logstash.local” :port 2003})

Options:

• :pool-size The number of connections to keep open. Default 4.
• :reconnect-interval How many seconds to wait between attempts to connect. Default 5.

• :claim-timeout How many seconds to wait for a logstash connection from the pool. Default 0.1.

• :block-start Wait for the pool’s initial connections to open before returning.

• :protocol Protocol to use. Either :tcp (default), :tls or :udp.

TLS options:

• :key A PKCS8-encoded private key file
• :cert The corresponding public certificate
• :ca-cert The certificate of the CA which signed this key