matching

package
v1.5.2 Latest Latest
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 Go to latest Published: Jan 22, 2021 License: MIT Imports: 44 Imported by: 0

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Index

Constants

This section is empty.

Variables

View Source 
var (

	// ErrNoTasks is exported temporarily for integration test
	ErrNoTasks = errors.New("No tasks")
)

Functions

func NewService 

func NewService(
	params *resource.BootstrapParams,
) (resource.Resource, error)

NewService builds a new matching service

Types

type Config added in v0.3.0 

type Config struct {
	PersistenceMaxQPS       dynamicconfig.IntPropertyFn
	PersistenceGlobalMaxQPS dynamicconfig.IntPropertyFn
	EnableSyncMatch         dynamicconfig.BoolPropertyFnWithTaskQueueInfoFilters
	RPS                     dynamicconfig.IntPropertyFn
	ShutdownDrainDuration   dynamicconfig.DurationPropertyFn

	// taskQueueManager configuration
	RangeSize                    int64
	GetTasksBatchSize            dynamicconfig.IntPropertyFnWithTaskQueueInfoFilters
	UpdateAckInterval            dynamicconfig.DurationPropertyFnWithTaskQueueInfoFilters
	IdleTaskqueueCheckInterval   dynamicconfig.DurationPropertyFnWithTaskQueueInfoFilters
	MaxTaskqueueIdleTime         dynamicconfig.DurationPropertyFnWithTaskQueueInfoFilters
	NumTaskqueueWritePartitions  dynamicconfig.IntPropertyFnWithTaskQueueInfoFilters
	NumTaskqueueReadPartitions   dynamicconfig.IntPropertyFnWithTaskQueueInfoFilters
	ForwarderMaxOutstandingPolls dynamicconfig.IntPropertyFnWithTaskQueueInfoFilters
	ForwarderMaxOutstandingTasks dynamicconfig.IntPropertyFnWithTaskQueueInfoFilters
	ForwarderMaxRatePerSecond    dynamicconfig.IntPropertyFnWithTaskQueueInfoFilters
	ForwarderMaxChildrenPerNode  dynamicconfig.IntPropertyFnWithTaskQueueInfoFilters

	// Time to hold a poll request before returning an empty response if there are no tasks
	LongPollExpirationInterval dynamicconfig.DurationPropertyFnWithTaskQueueInfoFilters
	MinTaskThrottlingBurstSize dynamicconfig.IntPropertyFnWithTaskQueueInfoFilters
	MaxTaskDeleteBatchSize     dynamicconfig.IntPropertyFnWithTaskQueueInfoFilters

	// taskWriter configuration
	OutstandingTaskAppendsThreshold dynamicconfig.IntPropertyFnWithTaskQueueInfoFilters
	MaxTaskBatchSize                dynamicconfig.IntPropertyFnWithTaskQueueInfoFilters

	ThrottledLogRPS dynamicconfig.IntPropertyFn
}

Config represents configuration for matching service

func NewConfig added in v0.3.0 

func NewConfig(dc *dynamicconfig.Collection) *Config

NewConfig returns new service config with default values

type Engine 

type Engine interface {
	Stop()
	AddWorkflowTask(hCtx *handlerContext, addRequest *matchingservice.AddWorkflowTaskRequest) (syncMatch bool, err error)
	AddActivityTask(hCtx *handlerContext, addRequest *matchingservice.AddActivityTaskRequest) (syncMatch bool, err error)
	PollWorkflowTaskQueue(hCtx *handlerContext, request *matchingservice.PollWorkflowTaskQueueRequest) (*matchingservice.PollWorkflowTaskQueueResponse, error)
	PollActivityTaskQueue(hCtx *handlerContext, request *matchingservice.PollActivityTaskQueueRequest) (*matchingservice.PollActivityTaskQueueResponse, error)
	QueryWorkflow(hCtx *handlerContext, request *matchingservice.QueryWorkflowRequest) (*matchingservice.QueryWorkflowResponse, error)
	RespondQueryTaskCompleted(hCtx *handlerContext, request *matchingservice.RespondQueryTaskCompletedRequest) error
	CancelOutstandingPoll(hCtx *handlerContext, request *matchingservice.CancelOutstandingPollRequest) error
	DescribeTaskQueue(hCtx *handlerContext, request *matchingservice.DescribeTaskQueueRequest) (*matchingservice.DescribeTaskQueueResponse, error)
	ListTaskQueuePartitions(hCtx *handlerContext, request *matchingservice.ListTaskQueuePartitionsRequest) (*matchingservice.ListTaskQueuePartitionsResponse, error)
}

Engine exposes interfaces for clients to poll for activity and workflow tasks.

func NewEngine 

func NewEngine(taskManager persistence.TaskManager,
	historyService history.Client,
	matchingClient matching.Client,
	config *Config,
	logger log.Logger,
	metricsClient metrics.Client,
	namespaceCache cache.NamespaceCache,
	resolver membership.ServiceResolver,
) Engine

NewEngine creates an instance of matching engine

type Forwarder added in v0.7.0 

type Forwarder struct {
	// contains filtered or unexported fields
}

Forwarder is the type that contains state pertaining to the api call forwarder component

func (*Forwarder) AddReqTokenC added in v0.7.0 

func (fwdr *Forwarder) AddReqTokenC() <-chan *ForwarderReqToken

AddReqTokenC returns a channel that can be used to wait for a token that's necessary before making a ForwardTask or ForwardQueryTask API call. After the API call is invoked, token.release() must be invoked

func (*Forwarder) ForwardPoll added in v0.7.0 

func (fwdr *Forwarder) ForwardPoll(ctx context.Context) (*internalTask, error)

ForwardPoll forwards a poll request to parent task queue partition if it exist

func (*Forwarder) ForwardQueryTask added in v0.7.0 

func (fwdr *Forwarder) ForwardQueryTask(
	ctx context.Context,
	task *internalTask,
) (*matchingservice.QueryWorkflowResponse, error)

ForwardQueryTask forwards a query task to parent task queue partition, if it exist

func (*Forwarder) ForwardTask added in v0.7.0 

func (fwdr *Forwarder) ForwardTask(ctx context.Context, task *internalTask) error

ForwardTask forwards an activity or workflow task to the parent task queue partition if it exist

func (*Forwarder) PollReqTokenC added in v0.7.0 

func (fwdr *Forwarder) PollReqTokenC() <-chan *ForwarderReqToken

PollReqTokenC returns a channel that can be used to wait for a token that's necessary before making a ForwardPoll API call. After the API call is invoked, token.release() must be invoked

type ForwarderReqToken added in v0.7.0 

type ForwarderReqToken struct {
	// contains filtered or unexported fields
}

ForwarderReqToken is the token that must be acquired before making forwarder API calls. This type contains the state for the token itself

type Handler 

type Handler struct {
	resource.Resource
	// contains filtered or unexported fields
}

Handler - gRPC handler interface for matchingservice

func NewHandler 

func NewHandler(
	resource resource.Resource,
	config *Config,
) *Handler

NewHandler creates a gRPC handler for the matchingservice

func (*Handler) AddActivityTask 

func (h *Handler) AddActivityTask(
	ctx context.Context,
	request *matchingservice.AddActivityTaskRequest,
) (_ *matchingservice.AddActivityTaskResponse, retError error)

AddActivityTask - adds an activity task.

func (*Handler) AddWorkflowTask added in v0.27.0 

func (h *Handler) AddWorkflowTask(
	ctx context.Context,
	request *matchingservice.AddWorkflowTaskRequest,
) (_ *matchingservice.AddWorkflowTaskResponse, retError error)

AddWorkflowTask - adds a workflow task.

func (*Handler) CancelOutstandingPoll added in v0.3.2 

func (h *Handler) CancelOutstandingPoll(ctx context.Context,
	request *matchingservice.CancelOutstandingPollRequest) (_ *matchingservice.CancelOutstandingPollResponse, retError error)

CancelOutstandingPoll is used to cancel outstanding pollers

func (*Handler) Check added in v0.27.0 

func (h *Handler) Check(_ context.Context, request *healthpb.HealthCheckRequest) (*healthpb.HealthCheckResponse, error)

https://github.com/grpc/grpc/blob/master/doc/health-checking.md

func (*Handler) DescribeTaskQueue added in v0.27.0 

func (h *Handler) DescribeTaskQueue(
	ctx context.Context,
	request *matchingservice.DescribeTaskQueueRequest,
) (_ *matchingservice.DescribeTaskQueueResponse, retError error)

DescribeTaskQueue returns information about the target task queue, right now this API returns the pollers which polled this task queue in last few minutes. If includeTaskQueueStatus field is true, it will also return status of task queue's ackManager (readLevel, ackLevel, backlogCountHint and taskIDBlock).

func (*Handler) ListTaskQueuePartitions added in v0.27.0 

func (h *Handler) ListTaskQueuePartitions(
	ctx context.Context,
	request *matchingservice.ListTaskQueuePartitionsRequest,
) (_ *matchingservice.ListTaskQueuePartitionsResponse, retError error)

ListTaskQueuePartitions returns information about partitions for a taskQueue

func (*Handler) PollActivityTaskQueue added in v0.27.0 

func (h *Handler) PollActivityTaskQueue(
	ctx context.Context,
	request *matchingservice.PollActivityTaskQueueRequest,
) (_ *matchingservice.PollActivityTaskQueueResponse, retError error)

PollActivityTaskQueue - long poll for an activity task.

func (*Handler) PollWorkflowTaskQueue added in v0.27.0 

func (h *Handler) PollWorkflowTaskQueue(
	ctx context.Context,
	request *matchingservice.PollWorkflowTaskQueueRequest,
) (_ *matchingservice.PollWorkflowTaskQueueResponse, retError error)

PollWorkflowTaskQueue - long poll for a workflow task.

func (*Handler) QueryWorkflow added in v0.3.2 

func (h *Handler) QueryWorkflow(
	ctx context.Context,
	request *matchingservice.QueryWorkflowRequest,
) (_ *matchingservice.QueryWorkflowResponse, retError error)

QueryWorkflow queries a given workflow synchronously and return the query result.

func (*Handler) RespondQueryTaskCompleted added in v0.3.2 

func (h *Handler) RespondQueryTaskCompleted(
	ctx context.Context,
	request *matchingservice.RespondQueryTaskCompletedRequest,
) (_ *matchingservice.RespondQueryTaskCompletedResponse, retError error)

RespondQueryTaskCompleted responds a query task completed

func (*Handler) Start 

func (h *Handler) Start()

Start starts the handler

func (*Handler) Stop 

func (h *Handler) Stop()

Stop stops the handler

func (*Handler) Watch added in v0.27.0 

func (h *Handler) Watch(*healthpb.HealthCheckRequest, healthpb.Health_WatchServer) error

type Service 

type Service struct {
	resource.Resource
	// contains filtered or unexported fields
}

Service represents the matching service

func (*Service) Start 

func (s *Service) Start()

Start starts the service

func (*Service) Stop 

func (s *Service) Stop()

Stop stops the service

type TaskMatcher added in v0.6.0 

type TaskMatcher struct {
	// contains filtered or unexported fields
}

TaskMatcher matches a task producer with a task consumer Producers are usually rpc calls from history or taskReader that drains backlog from db. Consumers are the task queue pollers

func (*TaskMatcher) MustOffer added in v0.6.0 

func (tm *TaskMatcher) MustOffer(ctx context.Context, task *internalTask) error

MustOffer blocks until a consumer is found to handle this task Returns error only when context is canceled or the ratelimit is set to zero (allow nothing) The passed in context MUST NOT have a deadline associated with it

func (*TaskMatcher) Offer added in v0.6.0 

func (tm *TaskMatcher) Offer(ctx context.Context, task *internalTask) (bool, error)

Offer offers a task to a potential consumer (poller) If the task is successfully matched with a consumer, this method will return true and no error. If the task is matched but consumer returned error, then this method will return true and error message. This method should not be used for query task. This method should ONLY be used for sync match.

When a local poller is not available and forwarding to a parent task queue partition is possible, this method will attempt forwarding to the parent partition.

Cases when this method will block:

Ratelimit: When a ratelimit token is not available, this method might block waiting for a token until the provided context timeout. Rate limits are not enforced for forwarded tasks from child partition.

Forwarded tasks that originated from db backlog: When this method is called with a task that is forwarded from a remote partition and if (1) this task queue is root (2) task was from db backlog - this method will block until context timeout trying to match with a poller. The caller is expected to set the correct context timeout.

returns error when:

  • ratelimit is exceeded (does not apply to query task)
  • context deadline is exceeded
  • task is matched and consumer returns error in response channel

func (*TaskMatcher) OfferQuery added in v0.7.0 

func (tm *TaskMatcher) OfferQuery(ctx context.Context, task *internalTask) (*matchingservice.QueryWorkflowResponse, error)

OfferQuery will either match task to local poller or will forward query task. Local match is always attempted before forwarding is attempted. If local match occurs response and error are both nil, if forwarding occurs then response or error is returned.

func (*TaskMatcher) Poll added in v0.6.0 

func (tm *TaskMatcher) Poll(ctx context.Context) (*internalTask, error)

Poll blocks until a task is found or context deadline is exceeded On success, the returned task could be a query task or a regular task Returns ErrNoTasks when context deadline is exceeded

func (*TaskMatcher) PollForQuery added in v0.6.0 

func (tm *TaskMatcher) PollForQuery(ctx context.Context) (*internalTask, error)

PollForQuery blocks until a *query* task is found or context deadline is exceeded Returns ErrNoTasks when context deadline is exceeded

func (*TaskMatcher) Rate added in v0.6.0 

func (tm *TaskMatcher) Rate() float64

Rate returns the current rate at which tasks are dispatched

func (*TaskMatcher) UpdateRatelimit added in v0.6.0 

func (tm *TaskMatcher) UpdateRatelimit(rps *float64)

UpdateRatelimit updates the task dispatch rate

Source Files

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