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/*
* SPDX-License-Identifier: Apache-2.0
* Copyright 2018-2020 The Feast Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package feast.core.model;
import com.google.protobuf.InvalidProtocolBufferException;
import com.google.protobuf.Message;
import com.google.protobuf.MessageOrBuilder;
import com.google.protobuf.util.JsonFormat;
import feast.core.util.TypeConversion;
import feast.proto.core.DataFormatProto.FileFormat;
import feast.proto.core.DataFormatProto.StreamFormat;
import feast.proto.core.DataSourceProto;
import feast.proto.core.DataSourceProto.DataSource.BigQueryOptions;
import feast.proto.core.DataSourceProto.DataSource.FileOptions;
import feast.proto.core.DataSourceProto.DataSource.KafkaOptions;
import feast.proto.core.DataSourceProto.DataSource.KinesisOptions;
import feast.proto.core.DataSourceProto.DataSource.SourceType;
import java.util.HashMap;
import java.util.Map;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.EnumType;
import javax.persistence.Enumerated;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
import lombok.AccessLevel;
import lombok.Getter;
import lombok.Setter;
@Entity
@Getter
@Setter(AccessLevel.PRIVATE)
@Table(name = "data_sources")
public class DataSource {
@Column(name = "id")
@Id
@GeneratedValue
private long id;
// Type of this Data Source
@Enumerated(EnumType.STRING)
@Column(name = "type", nullable = false)
private SourceType type;
// DataSource Options
@Column(name = "config")
private String configJSON;
// Field mapping between sourced fields (key) and feature fields (value).
// Stored as serialized JSON string.
@Column(name = "field_mapping", columnDefinition = "text")
private String fieldMapJSON;
@Column(name = "timestamp_column")
private String eventTimestampColumn;
@Column(name = "created_timestamp_column")
private String createdTimestampColumn;
@Column(name = "date_partition_column")
private String datePartitionColumn;
public DataSource() {};
public DataSource(SourceType type) {
this.type = type;
}
/**
* Construct a DataSource from the given Protobuf representation spec
*
* @param spec Protobuf representation of DataSource to construct from.
* @throws IllegalArgumentException when provided with a invalid Protobuf spec
* @throws UnsupportedOperationException if source type is unsupported.
*/
public static DataSource fromProto(DataSourceProto.DataSource spec) {
DataSource source = new DataSource(spec.getType());
// Copy source type specific options
Map<String, String> dataSourceConfigMap = new HashMap<>();
switch (spec.getType()) {
case BATCH_FILE:
dataSourceConfigMap.put("file_url", spec.getFileOptions().getFileUrl());
dataSourceConfigMap.put("file_format", printJSON(spec.getFileOptions().getFileFormat()));
break;
case BATCH_BIGQUERY:
dataSourceConfigMap.put("table_ref", spec.getBigqueryOptions().getTableRef());
break;
case STREAM_KAFKA:
dataSourceConfigMap.put("bootstrap_servers", spec.getKafkaOptions().getBootstrapServers());
dataSourceConfigMap.put(
"message_format", printJSON(spec.getKafkaOptions().getMessageFormat()));
dataSourceConfigMap.put("topic", spec.getKafkaOptions().getTopic());
break;
case STREAM_KINESIS:
dataSourceConfigMap.put(
"record_format", printJSON(spec.getKinesisOptions().getRecordFormat()));
dataSourceConfigMap.put("region", spec.getKinesisOptions().getRegion());
dataSourceConfigMap.put("stream_name", spec.getKinesisOptions().getStreamName());
break;
default:
throw new UnsupportedOperationException(
String.format("Unsupported Feature Store Type: %s", spec.getType()));
}
// Store DataSource mapping as serialised JSON
source.setConfigJSON(TypeConversion.convertMapToJsonString(dataSourceConfigMap));
// Store field mapping as serialised JSON
source.setFieldMapJSON(TypeConversion.convertMapToJsonString(spec.getFieldMappingMap()));
// Set timestamp mapping columns
source.setEventTimestampColumn(spec.getEventTimestampColumn());
source.setCreatedTimestampColumn(spec.getCreatedTimestampColumn());
source.setDatePartitionColumn(spec.getDatePartitionColumn());
return source;
}
/** Convert this DataSource to its Protobuf representation. */
public DataSourceProto.DataSource toProto() {
DataSourceProto.DataSource.Builder spec = DataSourceProto.DataSource.newBuilder();
spec.setType(getType());
// Extract source type specific options
Map<String, String> dataSourceConfigMap =
TypeConversion.convertJsonStringToMap(getConfigJSON());
switch (getType()) {
case BATCH_FILE:
FileOptions.Builder fileOptions = FileOptions.newBuilder();
fileOptions.setFileUrl(dataSourceConfigMap.get("file_url"));
FileFormat.Builder fileFormat = FileFormat.newBuilder();
parseMessage(dataSourceConfigMap.get("file_format"), fileFormat);
fileOptions.setFileFormat(fileFormat.build());
spec.setFileOptions(fileOptions.build());
break;
case BATCH_BIGQUERY:
BigQueryOptions.Builder bigQueryOptions = BigQueryOptions.newBuilder();
bigQueryOptions.setTableRef(dataSourceConfigMap.get("table_ref"));
spec.setBigqueryOptions(bigQueryOptions.build());
break;
case STREAM_KAFKA:
KafkaOptions.Builder kafkaOptions = KafkaOptions.newBuilder();
kafkaOptions.setBootstrapServers(dataSourceConfigMap.get("bootstrap_servers"));
kafkaOptions.setTopic(dataSourceConfigMap.get("topic"));
StreamFormat.Builder messageFormat = StreamFormat.newBuilder();
parseMessage(dataSourceConfigMap.get("message_format"), messageFormat);
kafkaOptions.setMessageFormat(messageFormat.build());
spec.setKafkaOptions(kafkaOptions.build());
break;
case STREAM_KINESIS:
KinesisOptions.Builder kinesisOptions = KinesisOptions.newBuilder();
kinesisOptions.setRegion(dataSourceConfigMap.get("region"));
kinesisOptions.setStreamName(dataSourceConfigMap.get("stream_name"));
StreamFormat.Builder recordFormat = StreamFormat.newBuilder();
parseMessage(dataSourceConfigMap.get("record_format"), recordFormat);
kinesisOptions.setRecordFormat(recordFormat.build());
spec.setKinesisOptions(kinesisOptions.build());
break;
default:
throw new UnsupportedOperationException(
String.format("Unsupported Feature Store Type: %s", getType()));
}
// Parse field mapping and options from JSON
spec.putAllFieldMapping(TypeConversion.convertJsonStringToMap(getFieldMapJSON()));
spec.setEventTimestampColumn(getEventTimestampColumn());
spec.setCreatedTimestampColumn(getCreatedTimestampColumn());
spec.setDatePartitionColumn(getDatePartitionColumn());
return spec.build();
}
public Map<String, String> getFieldsMap() {
return TypeConversion.convertJsonStringToMap(getFieldMapJSON());
}
@Override
public int hashCode() {
return toProto().hashCode();
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
DataSource other = (DataSource) o;
return this.toProto().equals(other.toProto());
}
/** Print the given Message into its JSON string representation */
private static String printJSON(MessageOrBuilder message) {
try {
return JsonFormat.printer().print(message);
} catch (InvalidProtocolBufferException e) {
throw new RuntimeException("Unexpected exception convering Proto to JSON", e);
}
}
/** Parse the given Message in JSON representation into the given Message Builder */
private static void parseMessage(String json, Message.Builder message) {
try {
JsonFormat.parser().merge(json, message);
} catch (InvalidProtocolBufferException e) {
throw new RuntimeException("Unexpected exception convering JSON to Proto", e);
}
}
}