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/*
* SPDX-License-Identifier: Apache-2.0
* Copyright 2018-2019 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.common.collect.Sets;
import com.google.protobuf.Message;
import feast.core.SourceProto;
import feast.core.SourceProto.KafkaSourceConfig;
import feast.core.SourceProto.Source.Builder;
import feast.core.SourceProto.SourceType;
import io.grpc.Status;
import java.util.Objects;
import java.util.Set;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import lombok.Setter;
@Setter
@Entity
@Table(name = "sources")
public class Source {
private static final Set<String> KAFKA_OPTIONS = Sets.newHashSet("bootstrapServers");
@Id
@Column(name = "id", updatable = false, nullable = false)
private String id;
// Type of the source. Should map to feast.types.Source.SourceType
@Column(name = "type", nullable = false)
private String type;
// Bootstrap servers, comma delimited. Used by kafka sources.
@Column(name = "bootstrap_servers")
private String bootstrapServers;
// Topics to listen to, comma delimited. Used by kafka sources.
@Column(name = "topics")
private String topics;
@Column(name = "is_default")
private boolean isDefault;
public Source() {
super();
}
public Source(SourceType type, KafkaSourceConfig config, boolean isDefault) {
if (config.getBootstrapServers().isEmpty() || config.getTopic().isEmpty()) {
throw Status.INVALID_ARGUMENT
.withDescription(
"Unsupported source options. Kafka source requires bootstrap servers and topic to be specified.")
.asRuntimeException();
}
this.type = type.toString();
this.bootstrapServers = config.getBootstrapServers();
this.topics = config.getTopic();
this.isDefault = isDefault;
this.id = generateId();
}
/**
* Construct a source facade object from a given proto object.
*
* @param sourceProto SourceProto.Source object
* @return Source facade object
*/
public static Source fromProto(SourceProto.Source sourceProto) {
if (sourceProto.equals(SourceProto.Source.getDefaultInstance())) {
Source source = new Source();
source.isDefault = true;
return source;
}
switch (sourceProto.getType()) {
case KAFKA:
return new Source(sourceProto.getType(), sourceProto.getKafkaSourceConfig(), false);
case UNRECOGNIZED:
default:
throw Status.INVALID_ARGUMENT
.withDescription("Unsupported source type. Only [KAFKA] is supported.")
.asRuntimeException();
}
}
/**
* Convert this object to its equivalent proto object.
*
* @return SourceProto.Source
*/
public SourceProto.Source toProto() {
Builder builder = SourceProto.Source.newBuilder().setType(SourceType.valueOf(type));
switch (SourceType.valueOf(type)) {
case KAFKA:
KafkaSourceConfig config =
KafkaSourceConfig.newBuilder()
.setBootstrapServers(bootstrapServers)
.setTopic(topics)
.build();
return builder.setKafkaSourceConfig(config).build();
case UNRECOGNIZED:
default:
throw new RuntimeException("Unable to convert source to proto");
}
}
/**
* Get the id for this feature source
*
* @return feature source id in the format TYPE/options
*/
public String getId() {
return id;
}
/**
* Get the options for this feature source
*
* @return feature source options
*/
public Message getOptions() {
switch (SourceType.valueOf(type)) {
case KAFKA:
return KafkaSourceConfig.newBuilder()
.setBootstrapServers(bootstrapServers)
.setTopic(topics)
.build();
case UNRECOGNIZED:
default:
throw new RuntimeException("Unable to convert source to proto");
}
}
/**
* Get the type of source.
*
* @return SourceType of this feature source
*/
public SourceType getType() {
return SourceType.valueOf(type);
}
/**
* Indicate whether to use the system defaults or not.
*
* @return boolean indicating whether this feature set source uses defaults.
*/
public boolean isDefault() {
return isDefault;
}
/**
* Override equality for sources. isDefault is always compared first; if both sources are using
* the default feature source, they will be equal. If not they will be compared based on their
* type-specific options.
*
* @param other other Source
* @return boolean equal
*/
public boolean equalTo(Source other) {
if (other.isDefault && isDefault || (type == null && other.type == null)) {
return true;
}
if ((type == null || !type.equals(other.type))) {
return false;
}
switch (SourceType.valueOf(type)) {
case KAFKA:
return bootstrapServers.equals(other.bootstrapServers) && topics.equals(other.topics);
case UNRECOGNIZED:
default:
return false;
}
}
private String generateId() {
switch (SourceType.valueOf(type)) {
case KAFKA:
return String.format("KAFKA/%s/%s", bootstrapServers, topics);
default:
// should not occur
return "";
}
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
Source source = (Source) o;
return id.equals(source.id);
}
@Override
public int hashCode() {
return Objects.hash(id);
}
}