jp.classmethod.aws.gradle.sqs.AmazonSQSMessageConsumerTask.java Source code

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Here is the source code for jp.classmethod.aws.gradle.sqs.AmazonSQSMessageConsumerTask.java

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/*
 * Copyright 2015-2016 the original author or authors.
 *
 * 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 jp.classmethod.aws.gradle.sqs;

import java.util.List;
import java.util.Locale;
import java.util.stream.Collectors;

import lombok.Setter;

import org.gradle.api.GradleException;
import org.gradle.api.tasks.TaskAction;

import com.amazonaws.services.sqs.AmazonSQS;
import com.amazonaws.services.sqs.model.DeleteMessageBatchRequestEntry;
import com.amazonaws.services.sqs.model.ReceiveMessageRequest;

public class AmazonSQSMessageConsumerTask extends AbstractAmazonSQSTask {

    private static final int MAX_MESSAGE_CONSUME_BATCH_SIZE = 10;

    @Setter
    private boolean showMessages = true;

    @Setter
    private boolean deleteMessages = true;

    @Setter
    private int maxNumberOfMessages = 1000;

    public AmazonSQSMessageConsumerTask() {
        setDescription("Consume/Delete SQS messages");
        setGroup("AWS");
    }

    @TaskAction
    public void consumeMessages() {
        String queueUrl = getQueueUrl();

        if (queueUrl == null) {
            throw new GradleException("Must specify either queueName or queueUrl");
        }

        AmazonSQSPluginExtension ext = getProject().getExtensions().getByType(AmazonSQSPluginExtension.class);
        AmazonSQS sqs = ext.getClient();

        int counter = 0;
        while (counter < maxNumberOfMessages) {
            ReceiveMessageRequest request = new ReceiveMessageRequest().withQueueUrl(queueUrl)
                    .withMaxNumberOfMessages(MAX_MESSAGE_CONSUME_BATCH_SIZE).withVisibilityTimeout(30);
            List<DeleteMessageBatchRequestEntry> messagesToDelete = sqs.receiveMessage(request).getMessages()
                    .stream().map(message -> {
                        if (showMessages) {
                            getLogger().lifecycle(
                                    String.format(Locale.ENGLISH, "Read message id: %s, message body: %200s",
                                            message.getMessageId(), message.getBody()));
                        }
                        return new DeleteMessageBatchRequestEntry(message.getMessageId(),
                                message.getReceiptHandle());
                    }).collect(Collectors.toList());

            if (messagesToDelete.isEmpty()) {
                break;
            }

            deleteMessages(sqs, queueUrl, messagesToDelete);
            counter += messagesToDelete.size();
        }

        getLogger().lifecycle("Consumed a total of {} messages from {}", counter, queueUrl);
    }

    private void deleteMessages(AmazonSQS sqs, String queueUrl,
            List<DeleteMessageBatchRequestEntry> messagesToDelete) {
        if (!deleteMessages || messagesToDelete.isEmpty()) {
            return;
        }

        getLogger().lifecycle("Deleting {} messages from {}, still working...", messagesToDelete.size(), queueUrl);
        sqs.deleteMessageBatch(queueUrl, messagesToDelete);
    }

}