prankstrisse commented on code in PR #11499: URL: https://github.com/apache/nifi/pull/11499#discussion_r4094379477
########## nifi-extension-bundles/nifi-protobuf-bundle/nifi-protobuf-services/src/main/java/org/apache/nifi/services/protobuf/WriteProtobufResultWithExternalSchema.java: ########## @@ -0,0 +1,137 @@ +/* + * 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.nifi.services.protobuf; + +import com.squareup.wire.schema.Schema; +import org.apache.nifi.schemaregistry.services.MessageIndexWriter; +import org.apache.nifi.schemaregistry.services.MessageName; +import org.apache.nifi.schemaregistry.services.SchemaDefinition; +import org.apache.nifi.schemaregistry.services.SchemaReferenceWriter; +import org.apache.nifi.serialization.AbstractRecordSetWriter; +import org.apache.nifi.serialization.record.Record; +import org.apache.nifi.serialization.record.RecordSchema; +import org.apache.nifi.services.protobuf.converter.ProtobufDataSerializer; + +import java.io.BufferedOutputStream; +import java.io.IOException; +import java.io.OutputStream; +import java.util.Map; + +/** + * Writes Records as Protocol Buffers binary content. When a {@link SchemaReferenceWriter} is + * configured, a Confluent wire-format header (magic byte and schema identifier) is written first; + * when a {@link MessageIndexWriter} is configured, the Confluent message index array follows the + * header. The serialized Protobuf payload is written last. + * <p> + * The Confluent framing (header and message index) is written once at the beginning of the record + * set, mirroring {@code WriteAvroResultWithExternalSchema}; the typical Confluent use case writes a + * single message per FlowFile. + */ +public class WriteProtobufResultWithExternalSchema extends AbstractRecordSetWriter { + + private final RecordSchema recordSchema; + private final SchemaDefinition schemaDefinition; + private final MessageName messageName; + private final SchemaReferenceWriter schemaReferenceWriter; + private final MessageIndexWriter messageIndexWriter; + private final Map<String, String> variables; + private final ProtobufDataSerializer serializer; + private final OutputStream buffered; + private boolean closed = false; + + public WriteProtobufResultWithExternalSchema(final Schema schema, + final MessageName messageName, + final RecordSchema recordSchema, + final SchemaDefinition schemaDefinition, + final SchemaReferenceWriter schemaReferenceWriter, + final MessageIndexWriter messageIndexWriter, + final Map<String, String> variables, + final OutputStream out) { + super(out); + this.recordSchema = recordSchema; + this.schemaDefinition = schemaDefinition; + this.messageName = messageName; + this.schemaReferenceWriter = schemaReferenceWriter; + this.messageIndexWriter = messageIndexWriter; + this.variables = variables; + this.buffered = new BufferedOutputStream(out); + this.serializer = new ProtobufDataSerializer(schema, messageName.getFullyQualifiedName()); + } + + @Override + protected void onBeginRecordSet() throws IOException { + writeConfluentFraming(buffered); + } + + @Override + protected Map<String, String> onFinishRecordSet() throws IOException { Review Comment: yes, fixed. It now returns the attributes both in onFinishRecordSet() and when a record is written without an active record set -- 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]
