Example #1
0
func WalkViewInBatches(result chan cb.ViewRow, errs chan errors.Error, stop chan bool, bucket *cb.Bucket,
	ddoc string, view string, isPrimary bool, options map[string]interface{}, batchSize int64, limit int64) {

	if limit != 0 && limit < batchSize {
		batchSize = limit
	}

	defer close(result)
	defer close(errs)

	defer func() {
		r := recover()
		if r != nil {
			logging.Errorf("View Walking Panic: %v\n%s", r, debug.Stack())
			errs <- errors.NewCbViewsAccessError(nil, "Panic In walking view "+view)
		}
	}()

	options["limit"] = batchSize + 1

	numRead := int64(0)
	numSent := int64(0)
	keysSent := map[string]bool{}
	ok := true
	for ok {

		logURL, err := bucket.ViewURL(ddoc, view, options)
		if err == nil {
			logging.Debugf("Request View: %v", logURL)
		}
		vres, err := bucket.View(ddoc, view, options)
		if err != nil {
			errs <- errors.NewCbViewsAccessError(err, "View name "+view)
			return
		}

		for i, row := range vres.Rows {
			// dont process the last row, its just used to see if we
			// need to continue processing
			if int64(i) < batchSize {
				// Send the row if its primary key has not been sent
				if isPrimary || !keysSent[row.ID] {
					select {
					case result <- row:
						numSent += 1
					case <-stop:
						ok = false
						break
					}
				}
				// For non primary views, mark the row's primary key as sent
				if !isPrimary {
					keysSent[row.ID] = true
				}
				numRead += 1
			}
		}

		if (int64(len(vres.Rows)) > batchSize) && (limit == 0 || (limit != 0 && numRead < limit)) {
			// prepare for next run
			skey := vres.Rows[batchSize].Key
			skeydocid := vres.Rows[batchSize].ID
			options["startkey"] = skey
			options["startkey_docid"] = cb.DocID(skeydocid)
		} else {
			// stop
			ok = false
		}
	}
	logging.Debugf("WalkViewInBatches %s: %d rows fetched, %d rows sent", view, numRead, numSent)
}
Example #2
0
	"github.com/couchbase/query/datastore"
	"github.com/couchbase/query/errors"
	"github.com/couchbase/query/logging"
	"github.com/couchbase/query/value"
)

const NETWORK_CHANNEL = "NETWORK"

const TYPE_NULL = 64
const TYPE_BOOLEAN = 96
const TYPE_NUMBER = 128
const TYPE_STRING = 160
const TYPE_ARRAY = 192
const TYPE_OBJECT = 224

var MIN_ID = cb.DocID("")
var MAX_ID = cb.DocID(strings.Repeat(string([]byte{0xff}), 251))

func ViewTotalRows(bucket *cb.Bucket, ddoc string, view string, options map[string]interface{}) (int64, errors.Error) {
	options["limit"] = 0

	logURL, err := bucket.ViewURL(ddoc, view, options)
	if err == nil {
		logging.Debugf("Request View: %v", logURL)
	}
	vres, err := bucket.View(ddoc, view, options)
	if err != nil {
		return 0, errors.NewCbViewsAccessError(err, "View Name"+view)
	}

	return int64(vres.TotalRows), nil