Class: ThrottledJsonRpcClient::Client

Inherits:
SimpleDelegator
  • Object
show all
Defined in:
lib/throttled_json_rpc_client.rb

Constant Summary collapse

DEFAULT_MAX_RETRIES = 
3
DEFAULT_BASE_DELAY =

Base delay in seconds

1

Instance Method Summary collapse

Constructor Details

#initialize(endpoint, timeout: JsonRpcClient::DEFAULT_TIMEOUT, max_batch_size: JsonRpcClient::DEFAULT_MAX_BATCH_SIZE, headers: {}, max_retries: DEFAULT_MAX_RETRIES, base_delay: DEFAULT_BASE_DELAY, rate: 5, interval: 1, redis_urls: ["redis://localhost:6379/2"]) ⇒ Client

limit: #rate requests / #interval seconds



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# File 'lib/throttled_json_rpc_client.rb', line 14

def initialize(
  endpoint,
  timeout: JsonRpcClient::DEFAULT_TIMEOUT,
  max_batch_size: JsonRpcClient::DEFAULT_MAX_BATCH_SIZE,
  headers: {},
  # retry params
  max_retries: DEFAULT_MAX_RETRIES,
  base_delay: DEFAULT_BASE_DELAY,
  # limit params
  rate: 5, 
  interval: 1, # in seconds
  redis_urls: ["redis://localhost:6379/2"]
)
  @max_retries = max_retries
  @base_delay = base_delay
  @queue = DistributedRateQueue.new(
    redis_urls: redis_urls,
    key: "key:#{endpoint}",
    rate: rate,
    interval: interval
  )
  super(
    JsonRpcClient.new(
      endpoint, 
      timeout: timeout, 
      max_batch_size: max_batch_size, 
      headers: headers
    )
  )
end

Instance Method Details

#batch_call(calls) ⇒ Object 



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# File 'lib/throttled_json_rpc_client.rb', line 62

def batch_call(calls)
  retries = 0
  begin
    @queue.shift do
      super(calls)
    end
  rescue JsonRpcClient::RpcError => e
    retries += 1
    if retries <= @max_retries
      delay = @base_delay * (2**(retries - 1))
      sleep(delay)
      retry
    end
    raise e
  end
end

#call(method, params = nil) ⇒ Object 



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# File 'lib/throttled_json_rpc_client.rb', line 45

def call(method, params = nil)
  retries = 0
  begin
    @queue.shift do
      super(method, params)
    end
  rescue JsonRpcClient::RpcError => e
    retries += 1
    if retries <= @max_retries
      delay = @base_delay * (2**(retries - 1))
      sleep(delay)
      retry
    end
    raise e
  end
end