feat(protobuf) Additional protobuf features

metadata-integration/java/datahub-protobuf-example/build.gradle

@@ -26,6 +26,7 @@ dependencies {
     datahub "com.google.protobuf:protobuf-java:$protobuf_version"
     datahub 'org.jgrapht:jgrapht-core:1.5.1'
     datahub 'com.google.guava:guava:27.0.1-jre'
+    datahub 'com.google.code.gson:gson:2.8.6'
 }
 
 sourceSets {

metadata-integration/java/datahub-protobuf-example/schema/protobuf/meta/meta.proto

@@ -16,70 +16,122 @@ import "google/protobuf/descriptor.proto";
 
 */
 enum DataHubMetadataType {
-  PROPERTY = 0; // Datahub Custom Property
-  TAG      = 1; // Datahub Tag
-  TERM     = 2; // Datahub Term
-}
-
-/*
-   Example below: The following is not required for annotation processing. This is an example
-   of creating an annotation using an enum.
- */
-
-enum MetaEnumExample {
-  UNKNOWN = 0;
-  ENTITY = 1;
-  EVENT = 2;
+    PROPERTY = 0; // Datahub Custom Property
+    TAG      = 1; // Datahub Tag
+    TAG_LIST = 2; //    comma delimited string
+    TERM     = 3; // Datahub Term
+    OWNER    = 4; // Datahub Owner
+    DOMAIN   = 5; // Datahub Domain
 }
 
 // Assuming Glossary Term defined from bootstrap example
 enum Classification {
-  HighlyConfidential = 0;
-  Confidential = 1;
-  Sensitive = 2;
+    HighlyConfidential = 0;
+    Confidential = 1;
+    Sensitive = 2;
+}
+
+message datahubField {
+      extend google.protobuf.FieldOptions {
+          // Required: Mark option field with how to export to DataHub in one or more places.
+          repeated DataHubMetadataType type = 5000;
+
+          // Set true if the field is a primary key. This works for any boolean with `primary_key` in it.
+          bool is_primary_key = 5010;
+      }
+}
+
+message securityField {
+    extend google.protobuf.FieldOptions {
+
+        // Extract classification field option as a Term, either works
+        string classification = 5100 [(datahubField.type) = TERM];
+        Classification classification_enum = 5101 [(datahubField.type) = TERM];
+    }
+}
+
+message field {
+    extend google.protobuf.FieldOptions {
+
+        string tags = 5150 [(datahubField.type) = TAG_LIST];
+    }
 }
 
-message fld {
-  extend google.protobuf.FieldOptions {
-    // Required: Mark option field with how to export to DataHub in one or more places.
-    repeated meta.DataHubMetadataType type = 6000;
+message ownership {
+    extend google.protobuf.MessageOptions {
 
-    /*
-        Examples below: The following is not required for annotation processing.
-    */
+        repeated string team = 5200 [(datahubField.type) = OWNER, (datahubField.type) = PROPERTY];
+        string data_steward = 5201 [(datahubField.type) = OWNER];
+        string domain = 5202 [(datahubField.type) = DOMAIN, (datahubField.type) = PROPERTY];
+    }
+}
+
+message security {
+    extend google.protobuf.MessageOptions {
 
-    // Set true if the field is a primary key. This works for any boolean with `primary_key` in it.
-    bool is_primary_key = 6010;
+        // Place the classification term at the Message/Dataset level, either string or enum is supported
+        string classification = 5300 [(datahubField.type) = TERM, (datahubField.type) = PROPERTY];
+        Classification classification_enum = 5301 [(datahubField.type) = TERM, (datahubField.type) = PROPERTY];
+    }
+}
 
-    // Extract classification field option as a Term, either works
-    string classification = 6001 [(meta.fld.type) = TERM];
-    meta.Classification classification_enum = 6002 [(meta.fld.type) = TERM];
+message kafka {
+    extend google.protobuf.MessageOptions {
 
-    // Expose this option as a tag on the field.
-    string product_type = 70004 [(meta.fld.type) = TAG];
-    bool product_type_bool = 70005 [(meta.fld.type) = TAG];
-    meta.MetaEnumExample product_type_enum = 70006 [(meta.fld.type) = TAG];
-  }
+        repeated string topics = 5400 [(datahubField.type) = PROPERTY];
+    }
 }
 
-message msg {
-  extend google.protobuf.MessageOptions {
-    /*
-        Examples below: The following is not required for annotation processing.
-    */
-
-    // Place the classification term at the Message/Dataset level, either string or enum is supported
-    string classification = 4000 [(meta.fld.type) = TERM, (meta.fld.type) = PROPERTY];
-    meta.Classification classification_enum = 4001 [(meta.fld.type) = TERM, (meta.fld.type) = PROPERTY];
-
-    // Attach these Message/Dataset options as a tag and property.
-    string product = 5001 [(meta.fld.type) = TAG, (meta.fld.type) = PROPERTY];
-    string project = 5002 [(meta.fld.type) = TAG, (meta.fld.type) = PROPERTY];
-    string team = 5003 [(meta.fld.type) = TAG, (meta.fld.type) = PROPERTY];
-
-    string domain = 60003 [(meta.fld.type) = TAG, (meta.fld.type) = PROPERTY];
-    meta.MetaEnumExample type = 60004 [(meta.fld.type) = TAG, (meta.fld.type) = PROPERTY];
-    bool bool_feature = 60005 [(meta.fld.type) = TAG];
-    string alert_channel = 60007 [(meta.fld.type) = PROPERTY];
-  }
+enum Frequency {
+    REALTIME = 0;
+    DAILY = 1;
+    WEEKLY = 2;
+    MONTHLY = 3;
+    YEARLY = 4;
+}
+
+message lifecycle {
+    extend google.protobuf.MessageOptions {
+
+        bool archived = 5500 [(datahubField.type) = TAG, (datahubField.type) = PROPERTY];
+        Frequency frequency = 5510 [(datahubField.type) = TAG, (datahubField.type) = PROPERTY];
+        string ttl = 5520 [(datahubField.type) = TAG];
+    }
+}
+
+enum MessageType {
+    ENTITY = 0;
+    EVENT = 1;
+    IMPRESSION = 2;
+}
+
+message message {
+    extend google.protobuf.MessageOptions {
+
+        string tags = 5600 [(datahubField.type) = TAG_LIST];
+        MessageType type = 5610 [(datahubField.type) = TAG, (datahubField.type) = PROPERTY];
+    }
+}
+
+message props {
+    extend google.protobuf.MessageOptions {
+
+        string prop1      = 5701 [(datahubField.type) = PROPERTY];
+        bool prop2        = 5702 [(datahubField.type) = PROPERTY];
+        MessageType prop3 = 5703 [(datahubField.type) = PROPERTY];
+
+        repeated string prop4      = 5704 [(datahubField.type) = PROPERTY];
+        repeated MessageType prop6 = 5706 [(datahubField.type) = PROPERTY];
+    }
+}
+
+message tags {
+    extend google.protobuf.MessageOptions {
+
+        string tag_str      = 5801 [(datahubField.type) = TAG];
+        bool tag_bool        = 5802 [(datahubField.type) = TAG];
+        MessageType tag_enum = 5803 [(datahubField.type) = TAG];
+
+        string tag_list      = 5804 [(datahubField.type) = TAG_LIST];
+    }
 }

metadata-integration/java/datahub-protobuf-example/schema/protobuf/v1/clickstream/ClickEvent.proto

@@ -0,0 +1,22 @@
+syntax = "proto3";
+package protobuf.clickstream;
+
+import "protobuf/meta/meta.proto";
+import "google/protobuf/timestamp.proto";
+
+
+/**
+  Clickstream data
+**/
+message Click {
+  option(meta.message.type) = EVENT;
+
+  option(meta.kafka.topics) = "clickstream_clicks";
+
+  option(meta.lifecycle.frequency) = REALTIME;
+  option(meta.lifecycle.ttl) = "180d";
+  option(meta.lifecycle.archived) = true;
+
+  google.protobuf.Timestamp timestamp = 1; // event timestamp
+  map<string, uint32> map_field = 7; // https://developers.google.com/protocol-buffers/docs/proto3#maps
+}

metadata-integration/java/datahub-protobuf-example/schema/protobuf/v1/clickstream/Device.proto

@@ -0,0 +1,61 @@
+syntax = "proto3";
+package protobuf.clickstream;
+
+import "protobuf/meta/meta.proto";
+import "protobuf/v1/clickstream/ClickEvent.proto";
+import "protobuf/v1/clickstream/SearchEvent.proto";
+import "protobuf/v1/clickstream/ImpressionEvent.proto";
+
+/**
+  Represents an internet browser.
+
+  Slack channel: #getting-started
+
+  Git owner: @datahub-project/johndoe
+
+  References:
+    https://en.wikipedia.org/wiki/Web_browser
+**/
+message Device {
+    option(meta.ownership.domain) = "Marketing";
+    option(meta.ownership.team) = "Analytics";
+    option(meta.ownership.team) = "IT";
+    option(meta.ownership.data_steward) = "corpUser:John Doe";
+
+    option(meta.message.type) = ENTITY;
+
+    option(meta.kafka.topics) = "devices";
+
+    // the device specific identifier
+    string device_id = 1 [(meta.datahubField.is_primary_key) = true];
+
+    // the device type associated with this event
+    DeviceType device_type = 2;
+
+    // the user ids associated with this device
+    repeated string user_id = 3;
+
+    // device's user agent
+    // https://en.wikipedia.org/wiki/User_agent
+    string user_agent = 4;
+
+    // device's ip address
+    // https://en.wikipedia.org/wiki/IP_address
+    string ip_address = 5
+    [(meta.securityField.classification) = "Classification.Sensitive"];
+
+    // Search history
+    repeated Search searches = 100;
+
+    // Impression history
+    repeated Impression impressions = 101;
+
+    // Click history
+     repeated Click clicks = 102;
+}
+
+enum DeviceType {
+    DESKTOP = 0;
+    MOBILE = 1;
+    TABLET = 2;
+}

metadata-integration/java/datahub-protobuf-example/schema/protobuf/v1/clickstream/ImpressionEvent.proto

@@ -0,0 +1,33 @@
+syntax = "proto3";
+package protobuf.clickstream;
+
+import "protobuf/meta/meta.proto";
+import "google/protobuf/timestamp.proto";
+
+/**
+  Clickstream impressions
+**/
+message Impression {
+  option(meta.message.type) = EVENT;
+  option(meta.kafka.topics) = "clickstream_impressions";
+
+  option(meta.props.prop1) = "prop1 value";
+  option(meta.props.prop2) = true;
+  option(meta.props.prop3) = EVENT;
+
+  option(meta.props.prop4) = "value1";
+  option(meta.props.prop4) = "value2";
+  option(meta.props.prop6) = EVENT;
+  option(meta.props.prop6) = IMPRESSION;
+
+  option(meta.tags.tag_str) = "value1";
+  option(meta.tags.tag_bool) = true;
+  // option(meta.tags.tag_enum) = EVENT;
+  option(meta.tags.tag_list) = "a, b, c";
+
+  option(meta.security.classification_enum) = HighlyConfidential;
+  option(meta.security.classification)      = "Classification.Sensitive";
+
+  google.protobuf.Timestamp timestamp = 1; // event timestamp
+  string details = 2; // event details
+}

metadata-integration/java/datahub-protobuf-example/schema/protobuf/v1/clickstream/SearchEvent.proto

@@ -0,0 +1,24 @@
+syntax = "proto3";
+package protobuf.clickstream;
+
+import "protobuf/meta/meta.proto";
+import "google/protobuf/timestamp.proto";
+import "google/protobuf/wrappers.proto";
+
+
+/**
+  Search event
+**/
+message Search {
+  option(meta.message.type) = EVENT;
+
+  option(meta.kafka.topics) = "clickstream_searches";
+
+  option(meta.lifecycle.frequency) = REALTIME;
+  option(meta.lifecycle.ttl) = "180d";
+  option(meta.lifecycle.archived) = true;
+
+  google.protobuf.Timestamp timestamp = 1; // event timestamp
+  google.protobuf.StringValue search_term = 2; // search term
+  google.protobuf.Int64Value results = 3; // results displayed
+}