Golang driver.NewDriverContext函數代碼示例

// createDriver makes a driver for the task
func (r *TaskRunner) createDriver() (driver.Driver, error) {
	driverCtx := driver.NewDriverContext(r.task.Name, r.config, r.config.Node, r.logger)
	driver, err := driver.NewDriver(r.task.Driver, driverCtx)
	if err != nil {
		err = fmt.Errorf("failed to create driver '%s' for alloc %s: %v",
			r.task.Driver, r.allocID, err)
		r.logger.Printf("[ERR] client: %s", err)
	}
	return driver, err
}

// createDriver makes a driver for the task
func (r *TaskRunner) createDriver() (driver.Driver, error) {
	if r.taskEnv == nil {
		return nil, fmt.Errorf("task environment not made for task %q in allocation %q", r.task.Name, r.alloc.ID)
	}

	driverCtx := driver.NewDriverContext(r.task.Name, r.config, r.config.Node, r.logger, r.taskEnv)
	driver, err := driver.NewDriver(r.task.Driver, driverCtx)
	if err != nil {
		return nil, fmt.Errorf("failed to create driver '%s' for alloc %s: %v",
			r.task.Driver, r.alloc.ID, err)
	}
	return driver, err
}

// setupDrivers is used to find the available drivers
func (c *Client) setupDrivers() error {
	// Build the whitelist of drivers.
	whitelist := c.config.ReadStringListToMap("driver.whitelist")
	whitelistEnabled := len(whitelist) > 0

	var avail []string
	var skipped []string
	driverCtx := driver.NewDriverContext("", c.config, c.config.Node, c.logger, nil)
	for name := range driver.BuiltinDrivers {
		// Skip fingerprinting drivers that are not in the whitelist if it is
		// enabled.
		if _, ok := whitelist[name]; whitelistEnabled && !ok {
			skipped = append(skipped, name)
			continue
		}

		d, err := driver.NewDriver(name, driverCtx)
		if err != nil {
			return err
		}
		c.configLock.Lock()
		applies, err := d.Fingerprint(c.config, c.config.Node)
		c.configLock.Unlock()
		if err != nil {
			return err
		}
		if applies {
			avail = append(avail, name)
		}

		p, period := d.Periodic()
		if p {
			go c.fingerprintPeriodic(name, d, period)
		}

	}

	c.logger.Printf("[DEBUG] client: available drivers %v", avail)

	if len(skipped) != 0 {
		c.logger.Printf("[DEBUG] client: drivers skipped due to whitelist: %v", skipped)
	}

	return nil
}

// setupDrivers is used to find the available drivers
func (c *Client) setupDrivers() error {
	// Build the whitelist of drivers.
	userWhitelist := strings.TrimSpace(c.config.ReadDefault("driver.whitelist", ""))
	whitelist := make(map[string]struct{})
	if userWhitelist != "" {
		for _, driver := range strings.Split(userWhitelist, ",") {
			trimmed := strings.TrimSpace(driver)
			whitelist[trimmed] = struct{}{}
		}
	}
	whitelistEnabled := len(whitelist) > 0

	var avail []string
	var skipped []string
	driverCtx := driver.NewDriverContext("", c.config, c.config.Node, c.logger)
	for name := range driver.BuiltinDrivers {
		// Skip fingerprinting drivers that are not in the whitelist if it is
		// enabled.
		if _, ok := whitelist[name]; whitelistEnabled && !ok {
			skipped = append(skipped, name)
			continue
		}

		d, err := driver.NewDriver(name, driverCtx)
		if err != nil {
			return err
		}
		applies, err := d.Fingerprint(c.config, c.config.Node)
		if err != nil {
			return err
		}
		if applies {
			avail = append(avail, name)
		}
	}

	c.logger.Printf("[DEBUG] client: available drivers %v", avail)

	if len(skipped) != 0 {
		c.logger.Printf("[DEBUG] client: drivers skipped due to whitelist: %v", skipped)
	}

	return nil
}

// setupDrivers is used to find the available drivers
func (c *Client) setupDrivers() error {
	var avail []string
	driverCtx := driver.NewDriverContext("", c.config, c.config.Node, c.logger)
	for name := range driver.BuiltinDrivers {
		d, err := driver.NewDriver(name, driverCtx)
		if err != nil {
			return err
		}
		applies, err := d.Fingerprint(c.config, c.config.Node)
		if err != nil {
			return err
		}
		if applies {
			avail = append(avail, name)
		}
	}
	c.logger.Printf("[DEBUG] client: available drivers %v", avail)
	return nil
}