messaging

问题 We are evaluating SNS for our messaging requirements to integrate multiple applications. we have a single producer that publishes messages to multiple topics on SNS. Each topic has 2-5 subscribers. In event of subscriber failures (down for maintenance) I have a few questions on the recommended strategy of using SQS queues per consumer Is it possible to configure SNS to push to SQS only in event of failure in delivering the message to a subscriber? Dumping all the messages in SQS queue creates

问题 We are evaluating SNS for our messaging requirements to integrate multiple applications. we have a single producer that publishes messages to multiple topics on SNS. Each topic has 2-5 subscribers. In event of subscriber failures (down for maintenance) I have a few questions on the recommended strategy of using SQS queues per consumer Is it possible to configure SNS to push to SQS only in event of failure in delivering the message to a subscriber? Dumping all the messages in SQS queue creates

问题 I am trying to link my app with firebase messaging services it compiled with this warning: INFO: API 'variant.getJavaCompile()' is obsolete and has been replaced with 'variant.getJavaCompileProvider()'. It will be removed at the end of 2019. For more information, see https://d.android.com/r/tools/task-configuration-avoidance. To determine what is calling variant.getJavaCompile(), use -Pandroid.debug.obsoleteApi=true on the command line to display more information. Affected Modules: app When I

问题 I have a rails app with intern messaging system. User can send message to other user. Example : User 1 send message User 2 can respond viceversa. All works perfectly. But I want to upgrade this system with notfications functionnality. I want to type of notifications : 1) On navbar 2) By mail Problem : I dont know how i can do this. Can you help me ? Conversations table class CreateConversations < ActiveRecord::Migration def change create_table :conversations do |t| t.integer :sender_id t

问题 Could you please advice an ZeroMQ socket(s) architecture for the following scenario: 1) there is server listening on port 2) there are several clients connecting server simultaneously 3) server accept all connections from clients and provide bi-directional queue for each client, means both party (client N or server) can send or consume messages, i.e. both party can be INITIATOR of the communication and other party should have a callback to process the message. Should we create additional

问题 Could you please advice an ZeroMQ socket(s) architecture for the following scenario: 1) there is server listening on port 2) there are several clients connecting server simultaneously 3) server accept all connections from clients and provide bi-directional queue for each client, means both party (client N or server) can send or consume messages, i.e. both party can be INITIATOR of the communication and other party should have a callback to process the message. Should we create additional

来源： https://stackoverflow.com/questions/55557389/how-to-setup-push-notifications-with-flutter-without-firebase-and-with-own-custo

来源： https://stackoverflow.com/questions/55557389/how-to-setup-push-notifications-with-flutter-without-firebase-and-with-own-custo

来源： https://stackoverflow.com/questions/63961186/chrome-extension-message-passing-not-working-background-js-to-content-js

来源： https://stackoverflow.com/questions/64013647/notification-system-design-for-multi-user-application