architecture

问题 I am developing application in N-Tier Architecture. as we all know that we need to implement transactions while insert/update/delete operation. please tell me how to use transaction in c#.net in N-Tier architecture. my architecture is like this Applicationform->middle_Layre->Factory->DataAccessLayre->StoredProcedure->Table in application form i create object of middleLayer and pass data in Insert/update/delete function of middle layer. i am creating object of sqlcommand in factoryclass and

问题 I am developing application in N-Tier Architecture. as we all know that we need to implement transactions while insert/update/delete operation. please tell me how to use transaction in c#.net in N-Tier architecture. my architecture is like this Applicationform->middle_Layre->Factory->DataAccessLayre->StoredProcedure->Table in application form i create object of middleLayer and pass data in Insert/update/delete function of middle layer. i am creating object of sqlcommand in factoryclass and

问题 I have a web server written in Node JS running on Heroku. The server has a web server process and a worker process. The web server successfully sends messages to the worker via a RabbitMQ queue; the worker successfully returns the processed data to the web server. I use a randomly generated Uuid to track the messages and ensure the right message is paired up with the right original message. In a separate project, I have the client (website) successfully communicating with the web server. Now,

问题 The use case is to use Redis to be local cache of MySQL The data format in MySQL is: a single primary key and several other fields. There will not be queries cross table of db Redis key is primary key in MySQL, and value is hash containing other fields in MySQL When power off, less than one minute data lose is acceptable. My solution is: Redis writes AOF file, some process will monitor this file and sync the updated datas to MySQL Hack Redis to write AOF in several files, just like MySQL

问题 The use case is to use Redis to be local cache of MySQL The data format in MySQL is: a single primary key and several other fields. There will not be queries cross table of db Redis key is primary key in MySQL, and value is hash containing other fields in MySQL When power off, less than one minute data lose is acceptable. My solution is: Redis writes AOF file, some process will monitor this file and sync the updated datas to MySQL Hack Redis to write AOF in several files, just like MySQL

问题 What are pros and cons of using microservices in comparison with alternative architectures? Is there a rule of thumb when microservices should be used? 回答1: Pros Sam Newman in Building Microservices, enumerates the key benefits of Microservices as following: Technology Heterogeneity With a system composed of multiple, collaborating services, we can decide to use different technologies inside each one. This allows us to pick the right tool for each job, rather than having to select a more

问题 Currently in $t0, there is an asciiz string however this string consists of only numeric characters, and I would like this to be stored as an integer so I can add a number to it. However the method I am trying does not seem to work. I load the users input into $a0, then move that address to $t0, and then chop off a character, then I try using andi to mask the first four bits, but this gives a memory address out of bounds error, any suggestions? EDIT: now the code only prints out the first

问题 most of the time in the service code I would have something like this: public SomeService : ISomeService { ISomeRepository someRepository; public Do(int id) { someRepository.Do(id); } } so it's kinda redundant so I started to use the repositories directly in the controller is this ok ? is there some architecture that is doing like this ? 回答1: You lose the ability to have business logic in between. I disagree with this one. If business logic is where it should be - in domain model, then

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . As a software engineer, I have a strong bias towards writing business logic in the application layer, while typically relying on the

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . As a software engineer, I have a strong bias towards writing business logic in the application layer, while typically relying on the