architecture

问题 I have a question about the architecture of application composed of microservices. I have few microservices, but those that are interesting in the context of this question are: Human Resources - here are stored all the user data such as username, sex, user's experience etc. Jobs - here are stored all the data about each job advertisement - job description, expected experience etc. So, I need to create new microservice (let's name it Recommender ) which sole purpose will be - based on the

问题 Inputs For example, we have a few services. Account service Product service Payment service Each service is a separate Google Cloud Function. Each service has its own HTTP API. For example, the account service has: https://REGION-FUNCTIONS_PROJECT_ID.cloudfunctions.net/account/sign-up https://REGION-FUNCTIONS_PROJECT_ID.cloudfunctions.net/account/sign-in https://REGION-FUNCTIONS_PROJECT_ID.cloudfunctions.net/account/reset-password etc Each service has its own swagger documentation endpoint

问题 I want to design a solution for sending different kinds of e-mails to several providers. The general overview. I have several upstream providers Sendgrid, Zoho, Mailgun and etc. They will be used to send e-mails and etc. For example: E-mail for Register new user E-mail for Remove user E-mail for Space Quota limit (in general around 6 types of e-mails) Every type of e-mail should be generated into Producers, converted into Serialized Java Object and Send to the appropriate Kafka Consumer

问题 When reading data from DB using ROOM and returning LiveData, getValue() method returns null. I have been unable to understand what is going wrong for a while now. Can you please assist with this issue? There is data in the database, it seems like it is more of an issue of how I am using LiveData objects. Activity: public class ExercisesViewActivity extends AppCompatActivity implements View.OnClickListener { private ExerciseViewModel exerciseViewModel; private ExercisesAdapter

问题 Title pretty much explains it all, its the last thing I'm trying to work into our project. We are structured with a Service Library which contains a function like so. /// <summary> /// Returns a single category based on the specified ID. /// </summary> public Category GetCategory(int CategoryID) { var RetVal = _session.Single<Category>(x => x.ID == CategoryID); return RetVal; } Now Category is a Entity (We are using Entity Framework) we need to convert that to a CategoryViewModel. Now, how

问题 Title pretty much explains it all, its the last thing I'm trying to work into our project. We are structured with a Service Library which contains a function like so. /// <summary> /// Returns a single category based on the specified ID. /// </summary> public Category GetCategory(int CategoryID) { var RetVal = _session.Single<Category>(x => x.ID == CategoryID); return RetVal; } Now Category is a Entity (We are using Entity Framework) we need to convert that to a CategoryViewModel. Now, how

问题 I have a main database with only setup data at the headquarter and several databases at different branches.I created a database link for each branch server. In some case I would like to query all the valid links (as some links could be invalid due to connection problems or anything else),so my question is How to check if the database link is valid without getting in Connection timeout problems. Is there a SQL statement to let the oracle main server do that check and return only the valid

问题 I have a main database with only setup data at the headquarter and several databases at different branches.I created a database link for each branch server. In some case I would like to query all the valid links (as some links could be invalid due to connection problems or anything else),so my question is How to check if the database link is valid without getting in Connection timeout problems. Is there a SQL statement to let the oracle main server do that check and return only the valid

问题 I was skimming through K&R C and I noticed that to read the entries in a directories, they used: while (read(dp->fd, (char *) &dirbuf, sizeof(dirbuf)) == sizeof(dirbuf)) /* code */ Where dirbuf was a system-specific directory structure, and dp->fd a valid file descriptor. On my system, dirbuf would have been a struct linux_dirent . Note that a struct linux_dirent has a flexible array member for the entry name, but let us assume, for the sake of simplicity, that it doesn't. (Dealing with the

问题 I was skimming through K&R C and I noticed that to read the entries in a directories, they used: while (read(dp->fd, (char *) &dirbuf, sizeof(dirbuf)) == sizeof(dirbuf)) /* code */ Where dirbuf was a system-specific directory structure, and dp->fd a valid file descriptor. On my system, dirbuf would have been a struct linux_dirent . Note that a struct linux_dirent has a flexible array member for the entry name, but let us assume, for the sake of simplicity, that it doesn't. (Dealing with the