mongo-ruby-driver/lib/mongo/util/logging.rb

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2011-09-11 16:08:26 +00:00
module Mongo
module Logging
def write_logging_startup_message
log(:warn, "Please note that logging negatively impacts client-side performance. " +
"You should set your logging level no lower than :info in production.")
end
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# Log a message with the given level.
def log(level, msg)
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return unless @logger
case level
when :debug then
@logger.debug "MONGODB [DEBUG] #{msg}"
when :warn then
@logger.warn "MONGODB [WARNING] #{msg}"
when :error then
@logger.error "MONGODB [ERROR] #{msg}"
when :fatal then
@logger.fatal "MONGODB [FATAL] #{msg}"
else
@logger.info "MONGODB [INFO] #{msg}"
end
end
# Execute the block and log the operation described by name and payload.
def instrument(name, payload = {}, &blk)
res = yield
log_operation(name, payload)
res
end
protected
def log_operation(name, payload)
@logger ||= nil
return unless @logger
msg = "#{payload[:database]}['#{payload[:collection]}'].#{name}("
msg += payload.values_at(:selector, :document, :documents, :fields ).compact.map(&:inspect).join(', ') + ")"
msg += ".skip(#{payload[:skip]})" if payload[:skip]
msg += ".limit(#{payload[:limit]})" if payload[:limit]
msg += ".sort(#{payload[:order]})" if payload[:order]
@logger.debug "MONGODB #{msg}"
end
end
end