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Implement inserts for kafka connector
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156
presto-kafka/src/main/java/io/prestosql/plugin/kafka/KafkaPageSink.java
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| /* | ||
| * 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 | ||
| * | ||
| * 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 io.prestosql.plugin.kafka; | ||
|
|
||
| import com.google.common.collect.ImmutableList; | ||
| import com.google.common.primitives.Shorts; | ||
| import com.google.common.primitives.SignedBytes; | ||
| import io.airlift.slice.Slice; | ||
| import io.prestosql.plugin.kafka.encoder.EncoderColumnHandle; | ||
| import io.prestosql.plugin.kafka.encoder.RowEncoder; | ||
| import io.prestosql.spi.Page; | ||
| import io.prestosql.spi.block.Block; | ||
| import io.prestosql.spi.connector.ConnectorPageSink; | ||
| import io.prestosql.spi.connector.ConnectorSession; | ||
| import io.prestosql.spi.type.TimestampType; | ||
| import io.prestosql.spi.type.TimestampWithTimeZoneType; | ||
| import io.prestosql.spi.type.Type; | ||
| import io.prestosql.spi.type.VarcharType; | ||
| import org.apache.kafka.clients.producer.KafkaProducer; | ||
| import org.apache.kafka.clients.producer.ProducerRecord; | ||
| import org.apache.kafka.common.serialization.ByteArraySerializer; | ||
|
|
||
| import java.util.Collection; | ||
| import java.util.List; | ||
| import java.util.concurrent.CompletableFuture; | ||
|
|
||
| import static io.prestosql.spi.type.BigintType.BIGINT; | ||
| import static io.prestosql.spi.type.BooleanType.BOOLEAN; | ||
| import static io.prestosql.spi.type.DateType.DATE; | ||
| import static io.prestosql.spi.type.DoubleType.DOUBLE; | ||
| import static io.prestosql.spi.type.IntegerType.INTEGER; | ||
| import static io.prestosql.spi.type.RealType.REAL; | ||
| import static io.prestosql.spi.type.SmallintType.SMALLINT; | ||
| import static io.prestosql.spi.type.TimeType.TIME; | ||
| import static io.prestosql.spi.type.TimeWithTimeZoneType.TIME_WITH_TIME_ZONE; | ||
| import static io.prestosql.spi.type.TinyintType.TINYINT; | ||
| import static io.prestosql.spi.type.VarbinaryType.VARBINARY; | ||
| import static java.lang.Float.intBitsToFloat; | ||
| import static java.lang.Math.toIntExact; | ||
| import static java.util.Objects.requireNonNull; | ||
| import static java.util.concurrent.CompletableFuture.completedFuture; | ||
|
|
||
| public class KafkaPageSink | ||
| implements ConnectorPageSink | ||
| { | ||
| private final String topicName; | ||
| private final List<KafkaColumnHandle> columns; | ||
| private final RowEncoder keyEncoder; | ||
| private final RowEncoder messageEncoder; | ||
| private final ConnectorSession session; | ||
| private final KafkaProducer<byte[], byte[]> producer; | ||
|
|
||
| public KafkaPageSink( | ||
| String topicName, | ||
| List<KafkaColumnHandle> columns, | ||
| RowEncoder keyEncoder, | ||
| RowEncoder messageEncoder, | ||
| ConnectorSession session, | ||
| PlainTextKafkaProducerFactory producerFactory) | ||
| { | ||
| this.topicName = requireNonNull(topicName, "topicName is null"); | ||
| this.columns = (requireNonNull(ImmutableList.copyOf(columns), "columns is null")); | ||
| this.keyEncoder = requireNonNull(keyEncoder, "keyEncoder is null"); | ||
| this.messageEncoder = requireNonNull(messageEncoder, "messageEncoder is null"); | ||
| this.session = requireNonNull(session, "session is null"); | ||
| this.producer = requireNonNull(producerFactory.create(new ByteArraySerializer(), new ByteArraySerializer()), "producerFactory is null"); | ||
| } | ||
|
|
||
| @Override | ||
| public CompletableFuture<?> appendPage(Page page) | ||
| { | ||
| for (int position = 0; position < page.getPositionCount(); position++) { | ||
| for (int channel = 0; channel < page.getChannelCount(); channel++) { | ||
| appendColumn(messageEncoder, page, channel, position); | ||
| } | ||
| producer.send(new ProducerRecord<>(topicName, messageEncoder.toByteArray())); | ||
| keyEncoder.clear(); | ||
| messageEncoder.clear(); | ||
| } | ||
| producer.flush(); | ||
| return NOT_BLOCKED; | ||
| } | ||
|
|
||
| private void appendColumn(RowEncoder rowEncoder, Page page, int channel, int position) | ||
| { | ||
| Block block = page.getBlock(channel); | ||
| EncoderColumnHandle columnHandle = columns.get(channel); | ||
| Type type = columns.get(channel).getType(); | ||
| if (block.isNull(position)) { | ||
| rowEncoder.putNullValue(columnHandle); | ||
| } | ||
| else if (type == BOOLEAN) { | ||
| rowEncoder.put(columnHandle, type.getBoolean(block, position)); | ||
| } | ||
| else if (type == BIGINT) { | ||
| rowEncoder.put(columnHandle, type.getLong(block, position)); | ||
| } | ||
| else if (type == INTEGER) { | ||
| rowEncoder.put(columnHandle, toIntExact(type.getLong(block, position))); | ||
| } | ||
| else if (type == SMALLINT) { | ||
| rowEncoder.put(columnHandle, Shorts.checkedCast(type.getLong(block, position))); | ||
| } | ||
| else if (type == TINYINT) { | ||
| rowEncoder.put(columnHandle, SignedBytes.checkedCast(type.getLong(block, position))); | ||
| } | ||
| else if (type == DOUBLE) { | ||
| rowEncoder.put(columnHandle, type.getDouble(block, position)); | ||
| } | ||
| else if (type == REAL) { | ||
| rowEncoder.put(columnHandle, intBitsToFloat(toIntExact(type.getLong(block, position)))); | ||
| } | ||
| else if (type instanceof VarcharType) { | ||
| rowEncoder.put(columnHandle, type.getSlice(block, position).toStringUtf8()); | ||
| } | ||
| else if (type == VARBINARY) { | ||
| rowEncoder.put(columnHandle, type.getSlice(block, position).toByteBuffer()); | ||
| } | ||
| else if (type == DATE) { | ||
| rowEncoder.put(columnHandle, type.getObjectValue(session, block, position)); | ||
| } | ||
| else if (type == TIME) { | ||
| rowEncoder.put(columnHandle, type.getObjectValue(session, block, position)); | ||
| } | ||
| else if (type == TIME_WITH_TIME_ZONE) { | ||
| rowEncoder.put(columnHandle, type.getObjectValue(session, block, position)); | ||
| } | ||
| else if (type instanceof TimestampType) { | ||
| rowEncoder.put(columnHandle, type.getObjectValue(session, block, position)); | ||
| } | ||
| else if (type instanceof TimestampWithTimeZoneType) { | ||
| rowEncoder.put(columnHandle, type.getObjectValue(session, block, position)); | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public CompletableFuture<Collection<Slice>> finish() | ||
| { | ||
| producer.close(); | ||
| return completedFuture(ImmutableList.of()); | ||
| } | ||
|
|
||
| @Override | ||
| public void abort() {} | ||
| } |
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