idempotent

问题 I'm using the C# driver (v1.8.3 from NuGet), and having a hard time determining if an $addtoSet/upsert operation actually added a NEW item into the given array, or if the item was already existing. Adding a new item could fall into two cases, either the document didn't exist at all and was just created by the upsert, or the document existed but the array didn't exist or didn't contain the given item. The reason I need to do this, is that I have large sets of data to load into MongoDB, which

问题 Do repeated requests to idempotent methods have to return the same response code? A lot of other people are asking the same question and ending up with contradicting answers. The answer should reference an authoritative source on the matter. 回答1: I asked this question on the HTTP mailing list and was told that idempotency does not include return codes. Meaning, you are free to return HTTP 204 the first time a resource is deleted, and HTTP 404 at a later time, so long as the subsequent request

问题 Is there a way that I can call $(selector).bind('click', handler) or $(selector).on('click', handler) multiple times such that the handler only gets attached once? Right now, I have multiple AJAX handlers with different success callbacks, each of which re-renders a different set of elements on the page. Ideally I'd like to refactor the "reattach events" routine to a single function rather than a routine for all. The only way I can think of to do this right now is to explicitly unbind, for

问题 I'm trying to create an idempotent playbook in a cisco router. I read the examples on the web and I think the problem is with the parameter "with_item". Here's the play: - name: Configurar subinterfaces para las VLAN 10,20 y 30 ios_config: provider: "{{ cli }}" parents: - interface GigabitEthernet0/0 lines: - interface GigabitEthernet0/0.{{ item.subinterface }} after: - description {{ item.name }} - encapsulation dot1q {{ item.subinterface }} - ip address {{ item.ip_add }} 255.255.255.0 with

问题 This question piggy backs of another question which I raised regarding abusing the IEnumerable interface by modifying an object as you iterate over it. The general consensus is that no anything that Implements IEnumerable should be idempotent. But .net supports compile time duck typing with the foreach statement. Any object that provides an IEnumerator GetEnumerator() method can be used inside a foreach statement. So should the GetEnumerator method be idempotent or is it when it implements

问题 As it was mentioned here https://restfulapi.net/http-methods/ (and in other places as well): GET APIs should be idempotent, which means that making multiple identical requests must produce same result everytime until another API (POST or PUT) has changed the state of resource on server. How to make this true in an API that return time for example? or that return data that is affected by time. In other words, each time I use GET http://ip:port/get-time-now/ , it is going to return a different

问题 Has anyone been able to successfully get RedisIdempotentRepository working in a Camel Route? My Camel Route is built using Java 8+, Apache Camel (2.17.1) and Spring Boot (1.3.3.RELEASE). The Camel Route loads and processes messages but does not filter out duplicates: from("activemq:generic.order"). idempotentConsumer(header("uniqueId"), RedisIdempotentRepository.redisIdempotentRepository(redisTemplate,"camel-repo")). to("activemq:unique.order"); The RedisTemplate is connected to a local Redis

问题 I am using Ansible and I want to run a task only once. I follow the documentation about how to configure and run a task only once - name: apt update shell: apt-get update run_once: true But when I run Ansible, it always runs this task. How can I run my task only once. 回答1: The run_once option will run every time your Playbook/tasks runs, but will only run it once during the specific run itself. So every time you run the play, it will run, but only on the first host in the list. If you're

问题 I'm writing a REST API and I wish to allow authenticated users with the proper permissions to upload files via this API. I thought I'd use a PUT endpoint to handle this. I want to include a failsafe where the request will be rejected with a 400 -family error if the resource already exists and the user did not specify via a query that the resource should be overwritten (i.e. PUT https://my.server.com/api/files/path/to/file.txt?overwrite=1 ). The HTTP/1.1 RFC documentation of PUT suggests that

问题 Let's say I want to build a REST service for making notes that looks something like this: GET /notes/ // gives me all notes GET /notes/{id} // gives the note identified by {id} DELETE /notes/{id} // delete note PUT /notes/{id} // creates a new note if there is no note identified by {id} // otherwise the existing note is updated Since I want my service to be indempotent I'm using PUT to create and update my notes, which implies that the ids of new notes are set/generated by the Client. I