Drasi

Data change processing platform with sources, continuous queries and reactions.

Provider: default
Kind: Stream processor
Category: Messaging
Official docs: https://drasi.io

Properties · 4 set by this component

property	type	values	required	kind default	this component
checkpointIntervalSeconds	integer	—	no	—	inherited
deploymentModel · component property	enum	library \| server \| kubernetes	no	kubernetes	inherited
exactlyOnce	boolean	—	no	false	▸ false
instances	integer	—	no	—	inherited
lateDataPolicy	enum	drop \| shift \| sideline	no	—	inherited
managed	boolean	—	no	false	▸ false
queryLanguage · component property	enum	cypher \| gql	no	cypher	inherited
stateBackend	enum	memory \| rocksdb \| external	no	memory	▸ external
watermarkSeconds	integer	—	no	—	inherited
windowing	enum	none \| event-time \| processing-time	no	none	▸ none

Rules that apply · 1

Every rule whose selector covers this component's kind or its category. Whether a rule fires depends on the design: its properties, its edges and its groups.

Event-time windows without watermarkwarning

windowed-aggregation-without-watermark

Event-time windows need a watermark to know when a window is complete. Without one the processor either waits forever or closes windows early and silently drops late events.

— all of these hold:
— the node's `windowing` is "event-time"
— the node's `watermarkSeconds` has no value

Use it in a design

nodes:
  - { id: "drasi", component: "drasi" }

Other Stream processor products · 33

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Source

1# yaml-language-server: $schema=../../schema/component.schema.json
2# Drasi: data change processing platform. Per the Drasi overview a Source watches a data store for
3# changes, a Continuous Query written in Cypher or GQL says which changes matter, and a Reaction
4# fires when the query result set changes; it deploys standalone or on Kubernetes.
5schemaVersion: "1"
6type: "component"
7id: "drasi"
8kind: "stream-processor"
9provider: "default"
10docs: "https://drasi.io"
11defaults:
12  managed: false
13  windowing: "none"
14  exactlyOnce: false
15  stateBackend: "external"
16properties:
17  queryLanguage:
18    type: "enum"
19    values: ["cypher", "gql"]
20    default: "cypher"
21  deploymentModel:
22    type: "enum"
23    values: ["library", "server", "kubernetes"]
24    default: "kubernetes"

The same page as markdown, for an agent: /catalogue/components/drasi.md