在 Amazon SQS 中使用 QueuePoller 类接收消息

以下示例使用 QueuePoller 实用程序类来显示 us-west-2 区域中 URL 为 URL 的 Amazon SQS 队列中所有消息的正文，然后删除消息。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 URL 的 Amazon SQS 队列，并最长等待 duration 中指定的秒数。

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

# 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 URL 的 Amazon SQS 队列，并为您提供长达可见性 timeout 中指定的秒数来处理消息，具体操作由方法 do_something 表示。

# 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 URL 的 Amazon SQS 队列，并为需要通过方法 do_something2 进行其他处理的任何消息更改可见性 timeout 指定的秒数。

# 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