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115 changes: 115 additions & 0 deletions
115
...flink-cdc/src/main/java/org/apache/paimon/flink/action/cdc/rabbitmq/QueueingConsumer.java
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| @@ -0,0 +1,115 @@ | ||
| /* | ||
| * 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.paimon.flink.action.cdc.rabbitmq; | ||
|
|
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| import com.rabbitmq.client.AMQP; | ||
| import com.rabbitmq.client.Channel; | ||
| import com.rabbitmq.client.Connection; | ||
| import com.rabbitmq.client.ConsumerCancelledException; | ||
| import com.rabbitmq.client.DefaultConsumer; | ||
| import com.rabbitmq.client.Delivery; | ||
| import com.rabbitmq.client.Envelope; | ||
| import com.rabbitmq.client.ShutdownSignalException; | ||
| import com.rabbitmq.utility.Utility; | ||
|
|
||
| import java.io.IOException; | ||
| import java.util.concurrent.BlockingQueue; | ||
| import java.util.concurrent.LinkedBlockingQueue; | ||
| import java.util.concurrent.TimeUnit; | ||
| import java.util.concurrent.TimeoutException; | ||
|
|
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| public class QueueingConsumer extends DefaultConsumer { | ||
|
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| private final Connection connection; | ||
| private final Channel channel; | ||
| private final BlockingQueue<Delivery> queue; | ||
| private volatile ShutdownSignalException shutdown; | ||
| private volatile ConsumerCancelledException cancelled; | ||
| private static final Delivery POISON = new Delivery(null, null, null); | ||
|
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| public QueueingConsumer(Connection connection, Channel channel) { | ||
| this(connection, channel, Integer.MAX_VALUE); | ||
| } | ||
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| public QueueingConsumer(Connection connection, Channel channel, int capacity) { | ||
| super(channel); | ||
| this.connection = connection; | ||
| this.channel = channel; | ||
| this.queue = new LinkedBlockingQueue(capacity); | ||
| } | ||
|
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| private void checkShutdown() { | ||
| if (this.shutdown != null) { | ||
| throw Utility.fixStackTrace(this.shutdown); | ||
| } | ||
| } | ||
|
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| private Delivery handle(Delivery delivery) { | ||
| if (delivery == POISON | ||
| || delivery == null && (this.shutdown != null || this.cancelled != null)) { | ||
| if (delivery == POISON) { | ||
| this.queue.add(POISON); | ||
| if (this.shutdown == null && this.cancelled == null) { | ||
| throw new IllegalStateException( | ||
| "POISON in queue, but null shutdown and null cancelled. This should never happen, please report as a BUG"); | ||
| } | ||
| } | ||
|
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| if (null != this.shutdown) { | ||
| throw Utility.fixStackTrace(this.shutdown); | ||
| } | ||
|
|
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| if (null != this.cancelled) { | ||
| throw Utility.fixStackTrace(this.cancelled); | ||
| } | ||
| } | ||
|
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| return delivery; | ||
| } | ||
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| public Delivery nextDelivery(long timeout, TimeUnit unit) | ||
| throws InterruptedException, ShutdownSignalException, ConsumerCancelledException { | ||
| return this.handle(this.queue.poll(timeout, unit)); | ||
| } | ||
|
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| public void handleShutdownSignal(String consumerTag, ShutdownSignalException sig) { | ||
| this.shutdown = sig; | ||
| this.queue.add(POISON); | ||
| } | ||
|
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| public void handleCancel(String consumerTag) { | ||
| this.cancelled = new ConsumerCancelledException(); | ||
| this.queue.add(POISON); | ||
| } | ||
|
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| public void handleDelivery( | ||
| String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) { | ||
| this.checkShutdown(); | ||
| this.queue.add(new Delivery(envelope, properties, body)); | ||
| } | ||
|
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| public void close() throws IOException, TimeoutException { | ||
| if (channel != null) { | ||
| channel.close(); | ||
| } | ||
| if (connection != null) { | ||
| connection.close(); | ||
| } | ||
| } | ||
| } |
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