pabloem commented on a change in pull request #16011: URL: https://github.com/apache/beam/pull/16011#discussion_r752438052
########## File path: sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/spanner/changestreams/model/ChangeStreamRecordMetadata.java ########## @@ -0,0 +1,409 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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 + * + * http://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 org.apache.beam.sdk.io.gcp.spanner.changestreams.model; + +import com.google.cloud.Timestamp; +import java.io.Serializable; +import java.util.Objects; +import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.annotations.VisibleForTesting; + +/** Holds internal execution metrics / metadata for the processed {@link ChangeStreamRecord}. */ +public class ChangeStreamRecordMetadata implements Serializable { Review comment: by implementing `Serializable` I suppose you're wanting to enable Beam to serialize your records using Java serialization. This makes sense, but you may want to consider removing the serializable, and instead annotating them with `@DefaultSchema(JavaBeanSchema.class)`. Reasons why you may want to do that: - Beam serialization is faster and more compact than Java serialization - By adding a schema to it, you can apply 'smart' transformations to your data (e.g. `.apply(Select.columns("recordTimestamp", "partitionToken"));` See https://beam.apache.org/releases/javadoc/current/org/apache/beam/sdk/schemas/annotations/DefaultSchema.html and see https://beam.apache.org/releases/javadoc/current/org/apache/beam/sdk/schemas/JavaBeanSchema.html ########## File path: sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/spanner/changestreams/model/ChangeStreamRecordMetadata.java ########## @@ -0,0 +1,409 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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 + * + * http://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 org.apache.beam.sdk.io.gcp.spanner.changestreams.model; + +import com.google.cloud.Timestamp; +import java.io.Serializable; +import java.util.Objects; +import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.annotations.VisibleForTesting; + +/** Holds internal execution metrics / metadata for the processed {@link ChangeStreamRecord}. */ +public class ChangeStreamRecordMetadata implements Serializable { Review comment: The only thing to keep in mind (and maybe the reason why you're using Java serialization) is that you can only have one schema per PCollection - so if you have records of multiple kinds in the same PCollection, this approach may not be good. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
