Examples with SamzaSqlRelMessageSerdeFactory org.apache.samza.sql.serializers.SamzaSqlRelMessageSerdeFactory used on opensource projects

Example 1 with SamzaSqlRelMessageSerdeFactory

use of org.apache.samza.sql.serializers.SamzaSqlRelMessageSerdeFactory in project samza by apache.

the class JoinTranslator method getTable.

private Table getTable(JoinInputNode tableNode, TranslatorContext context) {
    SqlIOConfig sourceTableConfig = resolveSQlIOForTable(tableNode.getRelNode(), context.getExecutionContext().getSamzaSqlApplicationConfig().getInputSystemStreamConfigBySource());
    if (sourceTableConfig == null || !sourceTableConfig.getTableDescriptor().isPresent()) {
        String errMsg = "Failed to resolve table source in join operation: node=" + tableNode.getRelNode();
        log.error(errMsg);
        throw new SamzaException(errMsg);
    }
    Table<KV<SamzaSqlRelRecord, SamzaSqlRelMessage>> table = context.getStreamAppDescriptor().getTable(sourceTableConfig.getTableDescriptor().get());
    if (tableNode.isRemoteTable()) {
        return table;
    }
    // If local table, load the table.
    // Load the local table with the fields in the join condition as composite key and relational message as the value.
    // Send the messages from the input stream denoted as 'table' to the created table store.
    MessageStream<SamzaSqlRelMessage> relOutputStream = context.getMessageStream(tableNode.getRelNode().getId());
    SamzaSqlRelRecordSerdeFactory.SamzaSqlRelRecordSerde keySerde = (SamzaSqlRelRecordSerdeFactory.SamzaSqlRelRecordSerde) new SamzaSqlRelRecordSerdeFactory().getSerde(null, null);
    SamzaSqlRelMessageSerdeFactory.SamzaSqlRelMessageSerde valueSerde = (SamzaSqlRelMessageSerdeFactory.SamzaSqlRelMessageSerde) new SamzaSqlRelMessageSerdeFactory().getSerde(null, null);
    List<Integer> tableKeyIds = tableNode.getKeyIds();
    // Let's always repartition by the join fields as key before sending the key and value to the table.
    // We need to repartition the stream denoted as table to ensure that both the stream and table that are joined
    // have the same partitioning scheme with the same partition key and number. Please note that bootstrap semantic is
    // not propagated to the intermediate streams. Please refer SAMZA-1613 for more details on this. Subsequently, the
    // results are consistent only after the local table is caught up.
    relOutputStream.partitionBy(m -> createSamzaSqlCompositeKey(m, tableKeyIds), m -> m, KVSerde.of(keySerde, valueSerde), intermediateStreamPrefix + "table_" + logicalOpId).sendTo(table);
    return table;
}

Example 2 with SamzaSqlRelMessageSerdeFactory

use of org.apache.samza.sql.serializers.SamzaSqlRelMessageSerdeFactory in project samza by apache.

the class JoinTranslator method joinStreamWithTable.

private MessageStream<SamzaSqlRelMessage> joinStreamWithTable(MessageStream<SamzaSqlRelMessage> inputStream, Table table, JoinInputNode streamNode, JoinInputNode tableNode, LogicalJoin join, TranslatorContext context) {
    List<Integer> streamKeyIds = streamNode.getKeyIds();
    List<Integer> tableKeyIds = tableNode.getKeyIds();
    Validate.isTrue(streamKeyIds.size() == tableKeyIds.size());
    log.info("Joining on the following Stream and Table field(s): ");
    List<String> streamFieldNames = new ArrayList<>(streamNode.getFieldNames());
    List<String> tableFieldNames = new ArrayList<>(tableNode.getFieldNames());
    for (int i = 0; i < streamKeyIds.size(); i++) {
        log.info(streamFieldNames.get(streamKeyIds.get(i)) + " with " + tableFieldNames.get(tableKeyIds.get(i)));
    }
    if (tableNode.isRemoteTable()) {
        String remoteTableName = tableNode.getSourceName();
        StreamTableJoinFunction joinFn = new SamzaSqlRemoteTableJoinFunction(context.getMsgConverter(remoteTableName), context.getTableKeyConverter(remoteTableName), streamNode, tableNode, join.getJoinType(), queryId);
        return inputStream.map(inputMetricsMF).join(table, joinFn);
    }
    // Join with the local table
    StreamTableJoinFunction joinFn = new SamzaSqlLocalTableJoinFunction(streamNode, tableNode, join.getJoinType());
    SamzaSqlRelRecordSerdeFactory.SamzaSqlRelRecordSerde keySerde = (SamzaSqlRelRecordSerdeFactory.SamzaSqlRelRecordSerde) new SamzaSqlRelRecordSerdeFactory().getSerde(null, null);
    SamzaSqlRelMessageSerdeFactory.SamzaSqlRelMessageSerde valueSerde = (SamzaSqlRelMessageSerdeFactory.SamzaSqlRelMessageSerde) new SamzaSqlRelMessageSerdeFactory().getSerde(null, null);
    // the names from the stream as the lookup needs to be done based on what is stored in the local table.
    return inputStream.map(inputMetricsMF).partitionBy(m -> createSamzaSqlCompositeKey(m, streamKeyIds, getSamzaSqlCompositeKeyFieldNames(tableFieldNames, tableKeyIds)), m -> m, KVSerde.of(keySerde, valueSerde), intermediateStreamPrefix + "stream_" + logicalOpId).map(KV::getValue).join(table, joinFn);
}