Rabbitmq

RabbitMQ River allows to automatically index a rabbitmq queue. The format of the messages follows the bulk api format:

{ "index" : { "index" : "twitter", "type" : "tweet", "id" : "1" } }
{ "tweet" : { "text" : "this is a tweet" } }
{ "delete" : { "index" : "twitter", "type" : "tweet", "id" : "2" } }
{ "create" : { "index" : "twitter", "type" : "tweet", "id" : "1" } }
{ "tweet" : { "text" : "another tweet" } }

Creating the rabbitmq river is as simple as (all configuration parameters are provided, with default values):

curl -XPUT 'localhost:9200/_river/my_river/_meta' -d '{
    "type" : "rabbitmq",
    "rabbitmq" : {
        "host" : "localhost",
        "port" : 5672,
        "user" : "guest",
        "pass" : "guest",
        "vhost" : "/",
        "queue" : "elasticsearch",
        "exchange" : "elasticsearch",
        "routing_key" : "elasticsearch",
        "exchange_type" : "direct",
        "exchange_durable" : true,
        "queue_durable" : true,
        "queue_auto_delete" : false
    },
    "index" : {
        "bulk_size" : 100,
        "bulk_timeout" : "10ms",
        "ordered" : false
    }
}'

The river is automatically bulking queue messages if the queue is overloaded, allowing for faster catchup with the messages streamed into the queue. The ordered flag allows to make sure that the messages will be indexed in the same order as they arrive in the query by blocking on the bulk request before picking up the next data to be indexed. It can also be used as a simple way to throttle indexing.

The rabbitmq river is provided as a plugin and can be installed using plugin -install river-rabbitmq.