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jruby-elasticsearch's Introduction

Start with it:

Grab the latest ElasticSearch distribution, and unpack it. Set your CLASSPATH to include the *jar files in the /lib directory.

Something like the following will accomplish this:

CLASSPATH=$(ls ./elasticsearch-0.20.6/lib/*.jar | tr '\n' ':')

To use from with Logstash source to get the appropriate jars for jruby-elasticsearch:

CLASSPATH=$(ls ./elasticsearch-0.20.6/lib/*.jar | tr '\n' ':') bin/logstash irb

Then to use the library in your code:

require "jruby-elasticsearch"
client = ElasticSearch::Client.new

DSL Example

client = ElasticSearch::Client.new
req = client.index("twitter", "tweet") do
  hello "world"     
  foo "bar"
end

req.execute!

# The above will index this document:
# {
#   "hello": "world",
#   "foo": "bar"<
# }

# Async w/ callback.
req.execute do |response|
  puts "Response; #{response}"
end

Non-DSL Example:

client = ElasticSearch::Client.new
#                  <index  >, <type   >, <id>, <data>
req = client.index("twitter", "fizzle2", nil, {
  "hello" => "world",
  "number" => rand(5000)
})
req.execute!

More complex method of indexing.

data = { "fizzle" => "dazzle", "pants" => "off" }
req = client.index("twitter", "tweet", data)

# Set up async callbacks
done = false
req.on(:success) do |response|
  puts "Got response: #{response.inspect}"
  done = true
end.on(:failure) do |exception|
  puts "Got failure: #{exception.inspect}"
  puts exception.backtrace
  done = true
end

# Execute it, but do it asynchronously.
req.execute

# Wait until we are done.
while !done
  sleep 1
end

Searching

# Example 1, method chaining
# Returns org.elasticsearch.action.search.SearchResponse
# querys for "some query" and asks for 30 results
client.search.query("some query").size(30).execute!

# Example 2, DSL
client.search do
  query "some query"

  # histogram, bucketed by 10000
  histogram "some field", 10000

  # how many results
  size 100
end.execute do |response|
  # response == org.elasticsearch.action.search.SearchResponse
end

jruby-elasticsearch's People

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jruby-elasticsearch's Issues

Unicast host configuration only supports single host

Currently the client only supports a single host for unicast discover.

client = ElasticSearch::Client.new({ :host => "10.0.0.10"})

In the cases where the client executes on a separate machine than an ES cluster node, there is the possibility that the one configured node is offline/unavailable when the client starts. ES supports multiple hosts for the 'discovery.zen.ping.unicast.hosts' and the current client code uses that to do port expansion. Adding multiple hosts as well should be trivial. Something like.

client = ElasticSearch::Client.new({ :hosts => ["10.0.0.10", "10.0.0.11"] })

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