Example #1
0
// newJoinSender returns a new JoinSender to join a cluster with
func newJoinSender(node *Node, opts *joinOpts) (*joinSender, error) {
	if opts == nil {
		opts = &joinOpts{}
	}

	if opts.discoverProvider == nil {
		return nil, errors.New("missing host provider in join options")
	}

	// Resolve/retrieve bootstrap hosts from the provider specified in the
	// join options.
	bootstrapHosts, err := opts.discoverProvider.Hosts()
	if err != nil {
		return nil, err
	}
	if len(bootstrapHosts) == 0 {
		return nil, errors.New("bootstrap hosts cannot be empty")
	}

	js := &joinSender{
		node:   node,
		logger: logging.Logger("join").WithField("local", node.Address()),
	}

	// Parse bootstrap hosts into a map
	js.parseHosts(bootstrapHosts)

	js.potentialNodes = js.CollectPotentialNodes(nil)

	js.timeout = util.SelectDuration(opts.timeout, defaultJoinTimeout)
	js.maxJoinDuration = util.SelectDuration(opts.maxJoinDuration, defaultMaxJoinDuration)
	js.parallelismFactor = util.SelectInt(opts.parallelismFactor, defaultParallelismFactor)
	js.size = util.SelectInt(opts.size, defaultJoinSize)
	js.size = util.Min(js.size, len(js.potentialNodes))
	js.delayer = opts.delayer

	if js.delayer == nil {
		// Create and use exponential delayer as the delay mechanism. Create it
		// with nil opts which uses default delayOpts.
		js.delayer, err = newExponentialDelayer(js.node.address, nil)
		if err != nil {
			return nil, err
		}
	}

	return js, nil
}
Example #2
0
func mergeDefaultOptions(opts *Options) *Options {
	def := defaultOptions()

	if opts == nil {
		return def
	}

	opts.SuspicionTimeout = util.SelectDuration(opts.SuspicionTimeout,
		def.SuspicionTimeout)

	opts.MinProtocolPeriod = util.SelectDuration(opts.MinProtocolPeriod,
		def.MinProtocolPeriod)

	opts.RollupMaxUpdates = util.SelectInt(opts.RollupMaxUpdates,
		def.RollupMaxUpdates)
	opts.RollupFlushInterval = util.SelectDuration(opts.RollupFlushInterval,
		def.RollupFlushInterval)

	opts.JoinTimeout = util.SelectDuration(opts.JoinTimeout, def.JoinTimeout)
	opts.PingTimeout = util.SelectDuration(opts.PingTimeout, def.PingTimeout)
	opts.PingRequestTimeout = util.SelectDuration(opts.PingRequestTimeout,
		def.PingRequestTimeout)

	opts.PingRequestSize = util.SelectInt(opts.PingRequestSize,
		def.PingRequestSize)

	if opts.Clock == nil {
		opts.Clock = def.Clock
	}

	return opts
}
Example #3
0
func (f *Forwarder) mergeDefaultOptions(opts *Options) *Options {
	def := f.defaultOptions()

	if opts == nil {
		return def
	}

	var merged Options

	merged.MaxRetries = util.SelectInt(opts.MaxRetries, def.MaxRetries)
	merged.Timeout = util.SelectDuration(opts.Timeout, def.Timeout)
	merged.RerouteRetries = opts.RerouteRetries

	merged.RetrySchedule = opts.RetrySchedule
	if opts.RetrySchedule == nil {
		merged.RetrySchedule = def.RetrySchedule
	}

	return &merged
}