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[FLINK-15571] Change Redis Sink to AsyncSink implementation
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117 changes: 117 additions & 0 deletions
117
.../main/java/org/apache/flink/connector/redis/streams/sink/RedisStreamsStateSerializer.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,117 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
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| package org.apache.flink.connector.redis.streams.sink; | ||
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| import org.apache.flink.connector.base.sink.writer.BufferedRequestState; | ||
| import org.apache.flink.connector.base.sink.writer.RequestEntryWrapper; | ||
| import org.apache.flink.core.io.SimpleVersionedSerializer; | ||
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| import java.io.ByteArrayInputStream; | ||
| import java.io.ByteArrayOutputStream; | ||
| import java.io.DataInputStream; | ||
| import java.io.DataOutputStream; | ||
| import java.io.IOException; | ||
| import java.util.ArrayList; | ||
| import java.util.Collection; | ||
| import java.util.HashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
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| /** The Redis implementation for {@link SimpleVersionedSerializer}. */ | ||
| public class RedisStreamsStateSerializer | ||
| implements SimpleVersionedSerializer<BufferedRequestState<RedisStreamsCommand>> { | ||
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| @Override | ||
| public int getVersion() { | ||
| return 1; | ||
| } | ||
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| @Override | ||
| public byte[] serialize(BufferedRequestState<RedisStreamsCommand> obj) throws IOException { | ||
| Collection<RequestEntryWrapper<RedisStreamsCommand>> bufferState = | ||
| obj.getBufferedRequestEntries(); | ||
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| try (final ByteArrayOutputStream baos = new ByteArrayOutputStream(); | ||
| final DataOutputStream out = new DataOutputStream(baos)) { | ||
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| out.writeInt(getVersion()); | ||
| out.writeInt(bufferState.size()); | ||
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| for (RequestEntryWrapper<RedisStreamsCommand> wrapper : bufferState) { | ||
| RedisStreamsCommand command = wrapper.getRequestEntry(); | ||
| writeString(out, command.key); | ||
| out.writeInt(command.value.size()); | ||
| for (Map.Entry<String, String> entry : command.value.entrySet()) { | ||
| writeString(out, entry.getKey()); | ||
| writeString(out, entry.getValue()); | ||
| } | ||
| } | ||
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| out.flush(); | ||
| return baos.toByteArray(); | ||
| } | ||
| } | ||
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| @Override | ||
| public BufferedRequestState<RedisStreamsCommand> deserialize(int version, byte[] serialized) | ||
| throws IOException { | ||
| try (final ByteArrayInputStream bais = new ByteArrayInputStream(serialized); | ||
| final DataInputStream in = new DataInputStream(bais)) { | ||
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| int byteVersion = in.readInt(); | ||
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| int bufferSize = in.readInt(); | ||
| List<RequestEntryWrapper<RedisStreamsCommand>> state = new ArrayList<>(); | ||
| for (int bs = 0; bs < bufferSize; bs++) { | ||
| String key = readString(in); | ||
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| int valueSize = in.readInt(); | ||
| Map<String, String> values = new HashMap<>(); | ||
| for (int i = 0; i < valueSize; i++) { | ||
| String eKey = readString(in); | ||
| String eValue = readString(in); | ||
| values.put(eKey, eValue); | ||
| } | ||
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| RedisStreamsCommand command = | ||
| RedisStreamsCommand.builder().withKey(key).withValue(values).build(); | ||
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| state.add(new RequestEntryWrapper<>(command, command.getMessageSize())); | ||
| } | ||
| return new BufferedRequestState<>(state); | ||
| } | ||
| } | ||
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| private void writeString(final DataOutputStream out, String value) throws IOException { | ||
| out.writeInt(value.length()); | ||
| out.writeBytes(value); | ||
| } | ||
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| private String readString(final DataInputStream in) throws IOException { | ||
| int sizeToRead = in.readInt(); | ||
| byte[] bytesRead = new byte[sizeToRead]; | ||
| int sizeRead = in.read(bytesRead); | ||
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| if (sizeToRead != sizeRead) { | ||
| throw new IOException( | ||
| String.format("Expected to read %s but read %s", sizeToRead, sizeRead)); | ||
| } | ||
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| return new String(bytesRead); | ||
| } | ||
| } |
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