persistent

Implementing a file based queue

由 こ雲淡風輕ζ 提交于 2019-12-09 00:30:29
问题 I have an in memory bounded queue in which multiple threads queue objects. Normally the queue should be emptied by a single reader thread that processes the items in the queue. However, there is a possibility that the queue is filled up. In such a case I would like to persist any additional items on the disk that would be processed by another background reader thread that scans a directory for such files and processes the entries within the files. I am familiar with Active MQ but prefer a

How to map persistent objects to DTO?

由 江枫思渺然 提交于 2019-12-08 12:57:59
问题 How to map persistent object to DTO? So that no additional behavior is taken. I know it is quite common and easy, but many people - many opinions, what are the best approaches? (talking about Java) Thanks, 回答1: You could use a object mapper like Dozer. 回答2: You can also use Orika it also support hetrogenous mapping with ease coding. 回答3: Another alternative is MapStruct (disclaimer: I'm the original author of this project). MapStruct generates mapping code at compile-time which is thus fast

Is there a way to retrieve iTunes Persistent ID on iPhone?

由 好久不见. 提交于 2019-12-08 12:33:11
问题 looking for a consistent unique ID across all iPhones associated with a iTunes account. Seems that the iTunes persistent ID would be ideal, however unable to find out how to retrieve this from within my xCode application. 回答1: This information isn't available programmatically to an application. Ask a broader question about what you're trying to accomplish and perhaps someone can offer more help. 来源： https://stackoverflow.com/questions/4620967/is-there-a-way-to-retrieve-itunes-persistent-id-on

Use of `get` and `toSqlKey` in persistent

由 孤街醉人 提交于 2019-12-08 11:10:44
问题 I'm trying to use persistent-postgresql with servant. I have a User model. I want to have an endpoint that takes an id and returns the user with that id. According to other answers I can use toSqlKey to turn an Int64 into a Key to feed to get . My function looks like: oneUser :: Int64 -> App (Entity User) oneUser userId = do maybeUser <- runDb $ get $ toSqlKey userId case maybeUser of Nothing -> throwError err404 Just user -> return user When I try to compile I get the error Couldn't match

Orphaned Session Management Records in Database. How to handle the issue? DB Stability Risk

由 不羁岁月 提交于 2019-12-08 05:18:52
问题 I have a webapp that uses persistent cookies to allow a user to stay logged it. I am using the Improved Persistent Login Cookie method. https://www.programering.com/a/MDO0MzMwATA.html https://www.experts-exchange.com/questions/29006560/selector-validator-cookies.html When a user is logging in through the LOGIN form and has asked to be remembered I generate a random selector and a random token and add these to a table called Session in my DB along with the userID and other values(IP,time

could not load class persistentBag

由 泪湿孤枕 提交于 2019-12-08 03:49:17
问题 I have a class below and I load this object from the DB but when I call this method through with JNDI address, give some error about kullainiciGrups attribute which is a java.util.List , if this attribute removed, it works without exception. Stack trace is below the code block; What do you think about this persistenceBag exception? Thanks. package enlil.domain; import java.io.Serializable; import java.math.BigDecimal; import java.util.Date; import java.util.List; import javax.persistence

CORBA: Java's servertool does not allow me to register a server class

由 霸气de小男生 提交于 2019-12-08 03:47:12
问题 Have been pulled down into the realm of CORBA... I am trying to quickly learn (if not master...) CORBA along side its Java mappings. I have come upon some old tutorials: Java IDL: The "Hello World" Example Naming Service orbd - The Object Request Broker Daemon I have created a project with the source from the first link above (Java IDL...) and have run both HelloServer and HelloClient after running the following command: start orbd -ORBInitialPort 1050 Not surprisingly, everything works :) I

Unable to Restart Service after killed despite running in foreground and with START_STICKY

由 送分小仙女□ 提交于 2019-12-07 14:20:14
问题 I am facing a critical issue with binded service running as foreground and with notification. I am doing everything correct as mentioned by most of the tutorials and solutions I found. I have an activity which starts a service and then bind with it. In onCreate() of service, i am using startForeground() and showing notification as well. I am also returning START_STICKY in onStartCommand() but when my application gets killed i see this in my log cat .. Force stopping package com.example

could not load class persistentBag

由 巧了我就是萌 提交于 2019-12-07 09:12:31
I have a class below and I load this object from the DB but when I call this method through with JNDI address, give some error about kullainiciGrups attribute which is a java.util.List , if this attribute removed, it works without exception. Stack trace is below the code block; What do you think about this persistenceBag exception? Thanks. package enlil.domain; import java.io.Serializable; import java.math.BigDecimal; import java.util.Date; import java.util.List; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.FetchType; import javax.persistence.Id;

How to remember an anonymous vote

由 两盒软妹~` 提交于 2019-12-07 05:59:48
问题 What is the best way to implement a "memory" or persistence for an anonymous vote? The other day I was browsing some site (unfortunately I forgot the URL), and I could quickly "thumbs up" or "thumbs down" an item. So I voted on several items. I then closed all my browser instances, deleted all the browser history and files. I went back to the site to vote on some of the same items but it "knew" that I had already voted. So I am wondering what's the best way to accomplish this I have read
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