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使用 Amazon SQS 中的 QueuePoller 类接收消息

以下示例使用QueuePoller实用程序类来显示 Amazon SQS 队列中所有消息的正文，URL 为URL中的us-west-2区域，并删除该消息。不活动时间达到大约 15 秒后，脚本超时。

# Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# This file is licensed under the Apache License, Version 2.0 (the "License").
# You may not use this file except in compliance with the License. A copy of the
# License is located at
#
# http://aws.amazon.com/apache2.0/
#
# This file 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.

require 'aws-sdk-sqs'  # v2: require 'aws-sdk'

Aws.config.update({region: 'us-west-2'})

poller = Aws::SQS::QueuePoller.new(URL)

poller.poll(idle_timeout: 15) do |msg|
  puts msg.body
end

以下示例循环访问 URL 为的 Amazon SQS 队列URL，并等待持续时间秒。

您可以通过执行 Amazon SQS 示例来获取正确的 URL获取有关 Amazon SQS 中的所有队列的信息。

# Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# This file is licensed under the Apache License, Version 2.0 (the "License").
# You may not use this file except in compliance with the License. A copy of the
# License is located at
#
# http://aws.amazon.com/apache2.0/
#
# This file 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.

require 'aws-sdk-sqs'  # v2: require 'aws-sdk'

Aws.config.update({region: 'us-west-2'})

poller = Aws::SQS::QueuePoller.new(URL)

poller.poll(wait_time_seconds: duration, idle_timeout: duration + 1) do |msg|
  puts msg.body
end

以下示例循环访问 URL 为的 Amazon SQS 队列URL，并为您提供可见性timeout秒来处理消息，由方法do_something。

# Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# This file is licensed under the Apache License, Version 2.0 (the "License").
# You may not use this file except in compliance with the License. A copy of the
# License is located at
#
# http://aws.amazon.com/apache2.0/
#
# This file 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.

require 'aws-sdk-sqs'  # v2: require 'aws-sdk'

# Process the message
def do_something(msg)
  puts msg.body
end

Aws.config.update({region: 'us-west-2'})

poller = Aws::SQS::QueuePoller.new(URL)

poller.poll(visibility_timeout: timeout, idle_timeout: timeout + 1) do |msg|
  do_something(msg)
end

以下示例循环访问 URL 为的 Amazon SQS 队列URL，并更改可见性timeout秒，对于需要通过方法进行额外处理的任何消息do_something2。

# Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# This file is licensed under the Apache License, Version 2.0 (the "License").
# You may not use this file except in compliance with the License. A copy of the
# License is located at
#
# http://aws.amazon.com/apache2.0/
#
# This file 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.

require 'aws-sdk-sqs'  # v2: require 'aws-sdk'

# Process the message
def do_something(_)
  true
end

# Do additional processing
def do_something2(msg)
  puts msg.body
end

Aws.config.update({region: 'us-west-2'})

poller = Aws::SQS::QueuePoller.new(URL)

poller.poll(idle_timeout: timeout + 1) do |msg|
  if do_something(msg)
    # need more time for processing
    poller.change_message_visibility_timeout(msg, timeout)

    do_something2(msg)
  end
end