quartz

package
v0.4.4 Latest Latest
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 Go to latest Published: Jul 13, 2022 License: MIT Imports: 14 Imported by: 0

Documentation

Overview

Package quartz is a simple, zero-dependency scheduling library for Go. Inspired by the Quartz Java scheduler.

See README.md for more info.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func HashCode 

func HashCode(s string) int

HashCode calculates and returns a hash code for the given string.

func NowNano 

func NowNano() int64

NowNano returns the current UTC Unix time in nanoseconds.

Types

type CronExpressionParser 

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

CronExpressionParser parses cron expressions.

func NewCronExpressionParser 

func NewCronExpressionParser(lastDefined int) *CronExpressionParser

NewCronExpressionParser returns a new CronExpressionParser.

type CronField 

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

CronField represents a parsed cron expression as an array.

func (*CronField) String added in v0.4.1 

func (cf *CronField) String() string

String is the CronField fmt.Stringer implementation.

type CronTrigger 

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

CronTrigger implements the quartz.Trigger interface. Used to fire a Job at given moments in time, defined with Unix 'cron-like' schedule definitions.

Examples:

Expression Meaning "0 0 12 * * ?" Fire at 12pm (noon) every day "0 15 10 ? * *" Fire at 10:15am every day "0 15 10 * * ?" Fire at 10:15am every day "0 15 10 * * ? *" Fire at 10:15am every day "0 * 14 * * ?" Fire every minute starting at 2pm and ending at 2:59pm, every day "0 0/5 14 * * ?" Fire every 5 minutes starting at 2pm and ending at 2:55pm, every day "0 0/5 14,18 * * ?" Fire every 5 minutes starting at 2pm and ending at 2:55pm, 

AND fire every 5 minutes starting at 6pm and ending at 6:55pm, every day

"0 0-5 14 * * ?" Fire every minute starting at 2pm and ending at 2:05pm, every day "0 10,44 14 ? 3 WED" Fire at 2:10pm and at 2:44pm every Wednesday in the month of March. "0 15 10 ? * MON-FRI" Fire at 10:15am every Monday, Tuesday, Wednesday, Thursday and Friday "0 15 10 15 * ?" Fire at 10:15am on the 15th day of every month

func NewCronTrigger 

func NewCronTrigger(expr string) (*CronTrigger, error)

NewCronTrigger returns a new CronTrigger using the UTC location.

func NewCronTriggerWithLoc added in v0.4.1 

func NewCronTriggerWithLoc(expr string, location *time.Location) (*CronTrigger, error)

NewCronTriggerWithLoc returns a new CronTrigger with the given time.Location.

func (*CronTrigger) Description 

func (ct *CronTrigger) Description() string

Description returns the description of the trigger.

func (*CronTrigger) NextFireTime 

func (ct *CronTrigger) NextFireTime(prev int64) (int64, error)

NextFireTime returns the next time at which the CronTrigger is scheduled to fire.

type CurlJob added in v0.3.0 

type CurlJob struct {
	RequestMethod string
	URL           string
	Body          string
	Headers       map[string]string
	Response      string
	StatusCode    int
	JobStatus     JobStatus
	// contains filtered or unexported fields
}

CurlJob represents a cURL command Job, implements the quartz.Job interface. cURL is a command-line tool for getting or sending data including files using URL syntax.

func NewCurlJob added in v0.3.0 

func NewCurlJob(
	method string,
	url string,
	body string,
	headers map[string]string,
) (*CurlJob, error)

NewCurlJob returns a new CurlJob.

func (*CurlJob) Description added in v0.3.0 

func (cu *CurlJob) Description() string

Description returns the description of the CurlJob.

func (*CurlJob) Execute added in v0.3.0 

func (cu *CurlJob) Execute()

Execute is called by a Scheduler when the Trigger associated with this job fires.

func (*CurlJob) Key added in v0.3.0 

func (cu *CurlJob) Key() int

Key returns the unique CurlJob key.

type Item 

type Item struct {
	Job     Job
	Trigger Trigger
	// contains filtered or unexported fields
}

Item is the PriorityQueue item.

type Job 

type Job interface {
	// Execute is called by a Scheduler when the Trigger associated with this job fires.
	Execute()

	// Description returns the description of the Job.
	Description() string

	// Key returns the unique key for the Job.
	Key() int
}

Job represents an interface to be implemented by structs which represent a 'job' to be performed.

type JobStatus added in v0.3.0 

type JobStatus int8

JobStatus represents a Job status. 

const (
	// NA is the initial Job status.
	NA JobStatus = iota

	// OK indicates the Job was completed successfully.
	OK

	// FAILURE indicates the Job failed.
	FAILURE
)

type PriorityQueue 

type PriorityQueue []*Item

PriorityQueue implements the heap.Interface.

func (*PriorityQueue) Head 

func (pq *PriorityQueue) Head() *Item

Head returns the first item of a PriorityQueue without removing it.

func (PriorityQueue) Len 

func (pq PriorityQueue) Len() int

Len returns the PriorityQueue length.

func (PriorityQueue) Less 

func (pq PriorityQueue) Less(i, j int) bool

Less is the items less comparator.

func (*PriorityQueue) Pop 

func (pq *PriorityQueue) Pop() interface{}

Pop implements the heap.Interface.Pop. Removes and returns element Len() - 1.

func (*PriorityQueue) Push 

func (pq *PriorityQueue) Push(x interface{})

Push implements the heap.Interface.Push. Adds x as element Len().

func (*PriorityQueue) Remove added in v0.4.1 

func (pq *PriorityQueue) Remove(i int) interface{}

Remove removes and returns the element at index i from the PriorityQueue.

func (PriorityQueue) Swap 

func (pq PriorityQueue) Swap(i, j int)

Swap exchanges the indexes of the items.

type RunOnceTrigger 

type RunOnceTrigger struct {
	Delay time.Duration
	// contains filtered or unexported fields
}

RunOnceTrigger implements the quartz.Trigger interface. This type of Trigger can only be fired once and will expire immediately.

func NewRunOnceTrigger 

func NewRunOnceTrigger(delay time.Duration) *RunOnceTrigger

NewRunOnceTrigger returns a new RunOnceTrigger with the given delay time.

func (*RunOnceTrigger) Description 

func (ot *RunOnceTrigger) Description() string

Description returns the description of the trigger.

func (*RunOnceTrigger) NextFireTime 

func (ot *RunOnceTrigger) NextFireTime(prev int64) (int64, error)

NextFireTime returns the next time at which the RunOnceTrigger is scheduled to fire. Sets exprired to true afterwards.

type ScheduledJob 

type ScheduledJob struct {
	Job                Job
	TriggerDescription string
	NextRunTime        int64
}

ScheduledJob wraps a scheduled Job with its metadata.

type Scheduler 

type Scheduler interface {
	// Start starts the scheduler.
	Start()

	// IsStarted determines whether the scheduler has been started.
	IsStarted() bool

	// ScheduleJob schedules a job using a specified trigger.
	ScheduleJob(job Job, trigger Trigger) error

	// GetJobKeys returns the keys of all of the scheduled jobs.
	GetJobKeys() []int

	// GetScheduledJob returns the scheduled job with the specified key.
	GetScheduledJob(key int) (*ScheduledJob, error)

	// DeleteJob removes the job with the specified key from the Scheduler's execution queue.
	DeleteJob(key int) error

	// Clear removes all of the scheduled jobs.
	Clear()

	// Stop shutdowns the scheduler.
	Stop()
}

Scheduler represents a Job orchestrator. Schedulers are responsible for executing Jobs when their associated Triggers fire (when their scheduled time arrives).

type ShellJob added in v0.3.0 

type ShellJob struct {
	Cmd       string
	Result    string
	JobStatus JobStatus
}

ShellJob represents a shell command Job, implements the quartz.Job interface. Be aware of runtime.GOOS when sending shell commands for execution.

func NewShellJob added in v0.3.0 

func NewShellJob(cmd string) *ShellJob

NewShellJob returns a new ShellJob.

func (*ShellJob) Description added in v0.3.0 

func (sh *ShellJob) Description() string

Description returns the description of the ShellJob.

func (*ShellJob) Execute added in v0.3.0 

func (sh *ShellJob) Execute()

Execute is called by a Scheduler when the Trigger associated with this job fires.

func (*ShellJob) Key added in v0.3.0 

func (sh *ShellJob) Key() int

Key returns the unique ShellJob key.

type SimpleTrigger 

type SimpleTrigger struct {
	Interval time.Duration
}

SimpleTrigger implements the quartz.Trigger interface; uses a fixed interval.

func NewSimpleTrigger 

func NewSimpleTrigger(interval time.Duration) *SimpleTrigger

NewSimpleTrigger returns a new SimpleTrigger using the given interval.

func (*SimpleTrigger) Description 

func (st *SimpleTrigger) Description() string

Description returns the description of the trigger.

func (*SimpleTrigger) NextFireTime 

func (st *SimpleTrigger) NextFireTime(prev int64) (int64, error)

NextFireTime returns the next time at which the SimpleTrigger is scheduled to fire.

type StdScheduler 

type StdScheduler struct {
	sync.Mutex
	Queue *PriorityQueue
	// contains filtered or unexported fields
}

StdScheduler implements the quartz.Scheduler interface.

func NewStdScheduler 

func NewStdScheduler() *StdScheduler

NewStdScheduler returns a new StdScheduler.

func (*StdScheduler) Clear 

func (sched *StdScheduler) Clear()

Clear removes all of the scheduled jobs.

func (*StdScheduler) DeleteJob 

func (sched *StdScheduler) DeleteJob(key int) error

DeleteJob removes the Job with the specified key if present.

func (*StdScheduler) GetJobKeys 

func (sched *StdScheduler) GetJobKeys() []int

GetJobKeys returns the keys of all of the scheduled jobs.

func (*StdScheduler) GetScheduledJob 

func (sched *StdScheduler) GetScheduledJob(key int) (*ScheduledJob, error)

GetScheduledJob returns the ScheduledJob with the specified key.

func (*StdScheduler) IsStarted added in v0.4.1 

func (sched *StdScheduler) IsStarted() bool

IsStarted determines whether the scheduler has been started.

func (*StdScheduler) ScheduleJob 

func (sched *StdScheduler) ScheduleJob(job Job, trigger Trigger) error

ScheduleJob schedules a Job using a specified Trigger.

func (*StdScheduler) Start 

func (sched *StdScheduler) Start()

Start starts the StdScheduler execution loop.

func (*StdScheduler) Stop 

func (sched *StdScheduler) Stop()

Stop exits the StdScheduler execution loop.

type Trigger 

type Trigger interface {
	// NextFireTime returns the next time at which the Trigger is scheduled to fire.
	NextFireTime(prev int64) (int64, error)

	// Description returns the description of the Trigger.
	Description() string
}

Trigger represents the mechanism by which Jobs are scheduled.

Source Files

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