mirror of
https://github.com/datahub-project/datahub.git
synced 2025-10-30 18:26:58 +00:00
adf975ee18
- Move non-README top-level MD files to /docs - Update all absolute links to files in /docs to relative links - Add a placeholder front page for GitHub Pages
268 lines
7.4 KiB
Markdown
268 lines
7.4 KiB
Markdown
# Onboarding to GMA Graph - Adding a new relationship type
|
|
|
|
Steps for this already detailed in [How to onboard to GMA graph?](../how/graph-onboarding.md)
|
|
|
|
For this exercise, we'll add a new relationship type `FollowedBy` which is extracted out of `Follow` aspect. For that, we first need to add `Follow` aspect.
|
|
|
|
## 1. Onboard `Follow` aspect
|
|
Referring to [How to add a new metadata aspect?](../how/add-new-aspect.md)
|
|
|
|
### 1.1 Model new aspect
|
|
* Follow.pdl
|
|
```
|
|
namespace com.linkedin.common
|
|
|
|
/**
|
|
* Follow information of an entity.
|
|
*/
|
|
record Follow {
|
|
|
|
/**
|
|
* List of followers of an entity.
|
|
*/
|
|
followers: array[FollowAction]
|
|
}
|
|
```
|
|
|
|
* FollowAction.pdl
|
|
```
|
|
namespace com.linkedin.common
|
|
|
|
/**
|
|
* Follow Action of an entity.
|
|
*/
|
|
record FollowAction {
|
|
|
|
/**
|
|
* Follower (User or a Group) of an entity
|
|
*/
|
|
follower: FollowerType
|
|
|
|
/**
|
|
* Audit stamp containing who last modified the record and when.
|
|
*/
|
|
lastModified: optional AuditStamp
|
|
}
|
|
```
|
|
|
|
* FollowerType.pdl
|
|
```
|
|
namespace com.linkedin.common
|
|
|
|
/**
|
|
* A union of all supported follower types
|
|
*/
|
|
typeref FollowerType = union[
|
|
corpUser: CorpuserUrn,
|
|
corpGroup: CorpGroupUrn
|
|
]
|
|
```
|
|
|
|
### 1.2 Update aspect union for dataset
|
|
```
|
|
namespace com.linkedin.metadata.aspect
|
|
|
|
import com.linkedin.common.Follow
|
|
import com.linkedin.common.InstitutionalMemory
|
|
import com.linkedin.common.Ownership
|
|
import com.linkedin.common.Status
|
|
import com.linkedin.dataset.DatasetDeprecation
|
|
import com.linkedin.dataset.DatasetProperties
|
|
import com.linkedin.dataset.UpstreamLineage
|
|
import com.linkedin.schema.SchemaMetadata
|
|
|
|
/**
|
|
* A union of all supported metadata aspects for a Dataset
|
|
*/
|
|
typeref DatasetAspect = union[
|
|
DatasetProperties,
|
|
DatasetDeprecation,
|
|
Follow,
|
|
UpstreamLineage,
|
|
InstitutionalMemory,
|
|
Ownership,
|
|
Status,
|
|
SchemaMetadata
|
|
]
|
|
```
|
|
|
|
## 2. Create `FollowedBy` relationship
|
|
```
|
|
namespace com.linkedin.metadata.relationship
|
|
|
|
/**
|
|
* A generic model for the Followed-By relationship
|
|
*/
|
|
@pairings = [ {
|
|
"destination" : "com.linkedin.common.urn.CorpuserUrn",
|
|
"source" : "com.linkedin.common.urn.DatasetUrn"
|
|
}, {
|
|
"destination" : "com.linkedin.common.urn.CorpGroupUrn",
|
|
"source" : "com.linkedin.common.urn.DatasetUrn"
|
|
} ]
|
|
record FollowedBy includes BaseRelationship {
|
|
}
|
|
```
|
|
|
|
## 3. Build the repo to generate Java classes for newly added models
|
|
```
|
|
./gradlew build -Prest.model.compatibility=ignore
|
|
```
|
|
|
|
You can verify that API definitions for /dataset endpoint of GMS as well as MXE schemas are automatically updated to include new model changes.
|
|
|
|
## 4. Create `FollowedBy` relationship builder from `Follow` aspect
|
|
```java
|
|
package com.linkedin.metadata.builders.graph.relationship;
|
|
|
|
import com.linkedin.common.Follow;
|
|
import com.linkedin.common.urn.Urn;
|
|
import com.linkedin.metadata.builders.graph.GraphBuilder;
|
|
import com.linkedin.metadata.relationship.FollowedBy;
|
|
import java.util.Collections;
|
|
import java.util.List;
|
|
import java.util.Objects;
|
|
import java.util.stream.Collectors;
|
|
import javax.annotation.Nonnull;
|
|
|
|
import static com.linkedin.metadata.dao.internal.BaseGraphWriterDAO.RemovalOption.*;
|
|
|
|
|
|
public class FollowedByBuilderFromFollow extends BaseRelationshipBuilder<Follow> {
|
|
|
|
public FollowedByBuilderFromFollow() {
|
|
super(Follow.class);
|
|
}
|
|
|
|
@Nonnull
|
|
@Override
|
|
public <URN extends Urn> List<GraphBuilder.RelationshipUpdates> buildRelationships(@Nonnull URN urn,
|
|
@Nonnull Follow follow) {
|
|
final List<FollowedBy> followedByList = follow.getFollowers().stream().map(followAction -> {
|
|
if (followAction.getFollower().isCorpUser()) {
|
|
return new FollowedBy().setSource(urn).setDestination(followAction.getFollower().getCorpUser());
|
|
}
|
|
if (followAction.getFollower().isCorpGroup()) {
|
|
return new FollowedBy().setSource(urn).setDestination(followAction.getFollower().getCorpGroup());
|
|
}
|
|
return null;
|
|
}).filter(Objects::nonNull).collect(Collectors.toList());
|
|
|
|
return Collections.singletonList(new GraphBuilder.RelationshipUpdates(followedByList, REMOVE_ALL_EDGES_FROM_SOURCE));
|
|
}
|
|
}
|
|
```
|
|
|
|
## 5. Update set of relationship builders for dataset by adding `FollowedByBuilderFromFollow`
|
|
|
|
```java
|
|
package com.linkedin.metadata.builders.graph;
|
|
|
|
import com.linkedin.common.urn.DatasetUrn;
|
|
import com.linkedin.data.template.RecordTemplate;
|
|
import com.linkedin.metadata.builders.graph.relationship.BaseRelationshipBuilder;
|
|
import com.linkedin.metadata.builders.graph.relationship.DownstreamOfBuilderFromUpstreamLineage;
|
|
import com.linkedin.metadata.builders.graph.relationship.FollowedByBuilderFromFollow;
|
|
import com.linkedin.metadata.builders.graph.relationship.OwnedByBuilderFromOwnership;
|
|
import com.linkedin.metadata.entity.DatasetEntity;
|
|
import com.linkedin.metadata.snapshot.DatasetSnapshot;
|
|
import java.util.Collections;
|
|
import java.util.HashSet;
|
|
import java.util.List;
|
|
import java.util.Set;
|
|
import javax.annotation.Nonnull;
|
|
|
|
public class DatasetGraphBuilder extends BaseGraphBuilder<DatasetSnapshot> {
|
|
private static final Set<BaseRelationshipBuilder> RELATIONSHIP_BUILDERS =
|
|
Collections.unmodifiableSet(new HashSet<BaseRelationshipBuilder>() {
|
|
{
|
|
add(new DownstreamOfBuilderFromUpstreamLineage());
|
|
add(new FollowedByBuilderFromFollow());
|
|
add(new OwnedByBuilderFromOwnership());
|
|
}
|
|
});
|
|
|
|
public DatasetGraphBuilder() {
|
|
super(DatasetSnapshot.class, RELATIONSHIP_BUILDERS);
|
|
}
|
|
|
|
@Nonnull
|
|
@Override
|
|
protected List<? extends RecordTemplate> buildEntities(@Nonnull DatasetSnapshot snapshot) {
|
|
final DatasetUrn urn = snapshot.getUrn();
|
|
final DatasetEntity entity = new DatasetEntity().setUrn(urn)
|
|
.setName(urn.getDatasetNameEntity())
|
|
.setPlatform(urn.getPlatformEntity())
|
|
.setOrigin(urn.getOriginEntity());
|
|
|
|
setRemovedProperty(snapshot, entity);
|
|
|
|
return Collections.singletonList(entity);
|
|
}
|
|
}
|
|
```
|
|
|
|
## 6. Rebuild & restart all containers with new changes
|
|
|
|
This is all the code change we need to do to enable linking datasets and corp users (groups as well).
|
|
Now we can re-build & start all Docker images.
|
|
|
|
```
|
|
./docker/rebuild-all/rebuild-all.sh
|
|
```
|
|
|
|
## 7. That's it. Let's test our new feature!
|
|
|
|
Let's ingest a user first
|
|
```
|
|
curl 'http://localhost:8080/corpUsers?action=ingest' -X POST -H 'X-RestLi-Protocol-Version:2.0.0' --data '
|
|
{
|
|
"snapshot": {
|
|
"aspects": [{
|
|
"com.linkedin.identity.CorpUserInfo": {
|
|
"active": true,
|
|
"displayName": "Foo Bar",
|
|
"fullName": "Foo Bar",
|
|
"email": "fbar@linkedin.com"
|
|
}
|
|
}],
|
|
"urn": "urn:li:corpuser:fbar"
|
|
}
|
|
}'
|
|
```
|
|
|
|
And now let's ingest a dataset with two aspects: Ownership & Follow
|
|
```
|
|
curl 'http://localhost:8080/datasets?action=ingest' -X POST -H 'X-RestLi-Protocol-Version:2.0.0' --data '
|
|
{
|
|
"snapshot": {
|
|
"aspects": [{
|
|
"com.linkedin.common.Ownership": {
|
|
"owners": [{
|
|
"owner": "urn:li:corpuser:fbar",
|
|
"type": "DATAOWNER"
|
|
}],
|
|
"lastModified": {
|
|
"time": 0,
|
|
"actor": "urn:li:corpuser:fbar"
|
|
}
|
|
}
|
|
},
|
|
{
|
|
"com.linkedin.common.Follow": {
|
|
"followers": [{
|
|
"follower": {
|
|
"corpUser": "urn:li:corpuser:fbar"
|
|
}
|
|
}]
|
|
}
|
|
}],
|
|
"urn": "urn:li:dataset:(urn:li:dataPlatform:foo,bar,PROD)"
|
|
}
|
|
}'
|
|
```
|
|
|
|
Ownership aspect will help create an `OwnedBy` edge between user & dataset nodes. That existed already.
|
|
Now that we added follow aspect, we'll also be able to see a `FollowedBy` edge between same user & dataset nodes.
|
|
|
|
You can confirm this by connecting to Neo4j browser on http://localhost:7474/browser |