/*
* 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.controller.swap;
import java.io.DataInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.apache.nifi.controller.queue.FlowFileQueue;
import org.apache.nifi.controller.repository.FlowFileRecord;
import org.apache.nifi.controller.repository.SwapContents;
import org.apache.nifi.controller.repository.SwapSummary;
import org.apache.nifi.controller.repository.claim.ResourceClaimManager;
import org.apache.nifi.controller.repository.schema.FlowFileRecordFieldMap;
import org.apache.nifi.repository.schema.ComplexRecordField;
import org.apache.nifi.repository.schema.Record;
import org.apache.nifi.repository.schema.RecordField;
import org.apache.nifi.repository.schema.RecordSchema;
import org.apache.nifi.repository.schema.Repetition;
import org.apache.nifi.repository.schema.SchemaRecordReader;
public class SchemaSwapDeserializer implements SwapDeserializer {
@Override
@SuppressWarnings("unchecked")
public SwapContents deserializeFlowFiles(final DataInputStream in, final String swapLocation, final FlowFileQueue queue, final ResourceClaimManager claimManager) throws IOException {
final RecordSchema schema = RecordSchema.readFrom(in);
final SchemaRecordReader reader = SchemaRecordReader.fromSchema(schema);
final Record parentRecord = reader.readRecord(in);
final List<Record> flowFileRecords = (List<Record>) parentRecord.getFieldValue(SwapSchema.FLOWFILE_CONTENTS);
final List<FlowFileRecord> flowFiles = new ArrayList<>(flowFileRecords.size());
for (final Record record : flowFileRecords) {
flowFiles.add(FlowFileRecordFieldMap.getFlowFile(record, claimManager));
}
final Record summaryRecord = (Record) parentRecord.getFieldValue(SwapSchema.SWAP_SUMMARY);
final SwapSummary swapSummary = SwapSummaryFieldMap.getSwapSummary(summaryRecord, claimManager);
return new StandardSwapContents(swapSummary, flowFiles);
}
@Override
public SwapSummary getSwapSummary(final DataInputStream in, final String swapLocation, final ResourceClaimManager claimManager) throws IOException {
final RecordSchema schema = RecordSchema.readFrom(in);
final List<RecordField> summaryFields = schema.getField(SwapSchema.SWAP_SUMMARY).getSubFields();
final RecordField summaryRecordField = new ComplexRecordField(SwapSchema.SWAP_SUMMARY, Repetition.EXACTLY_ONE, summaryFields);
final RecordSchema summarySchema = new RecordSchema(Collections.singletonList(summaryRecordField));
final Record summaryRecordParent = SchemaRecordReader.fromSchema(summarySchema).readRecord(in);
final Record summaryRecord = (Record) summaryRecordParent.getFieldValue(SwapSchema.SWAP_SUMMARY);
final SwapSummary swapSummary = SwapSummaryFieldMap.getSwapSummary(summaryRecord, claimManager);
return swapSummary;
}
public static String getSerializationName() {
return SchemaSwapSerializer.SERIALIZATION_NAME;
}
}