batch-processing

问题 I have connected to my Teradata database via JDBC and am trying to use the FASTLOAD utility of Teradata to insert records into a table (with prepared statements and batch). Eg: connection = DriverManager.getConnection("jdbc:teradata://192.168.1.110/TYPE=FASTLOAD", "admin", "admin"); String sql = "INSERT INTO table (RANDOM_INTEGER) VALUES (?)"; PreparedStatement preparedStatement = connection.prepareStatement(sql); int numberOfRecordsToInsert = 100000; for (int i = 0; i <

问题 I am trying to create a pdf page conatining 6 plots (3 rows and 2 columns) using a for loop. I am able to create the plots but i cant seem to automate adding a regression line to each plot. I am trying the following code. #Dummy data Data1 <- data.frame(flow = c(8,8.5,6,7.1,9), SP_elev = c(20,11,5,25,50)) Data2 <- data.frame(flow = c(7,7.2,6.5,8.2,8.5), SP_elev = c(13,15,18,25,19)) Data3 <- data.frame(flow = c(2,3,5,7,9), SP_elev = c(20,25,28,30,35)) Data4 <- data.frame(flow = c(1,4,6,8,9),

问题 I have two sets of images in folder A and folder B. They share common file names. E.g. I have Image01 and Image02 in both the folders. I need to superpose Image01 from folder A on Image 01 from folder B and so on respectively. Is there a way I can automate this using ImageMagick or batch processing? 回答1: Assuming your environment is Mac OSX or Linux or Unix... Then you could this: for img in A/* ; do \ convert \ A/${img} \ B/$(basename ${img}) \ -gravity center \ -compose blend \ -composite \

问题 I am quite new to Spring-Batch and I wonder whether there is a way to access the step-id from within an ItemReader or ItemWriter? In my case that would allow switching enum types based on different step-definitions in a single ItemReader implementation. Does anyone know a way to do that? 回答1: Assuming the ItemReader or ItemWriter are step scoped, you can do this: <bean id="flatFileItemReader" scope="step" class="org.springframework.batch.item.file.FlatFileItemReader"> <property name="resource

问题 I have an "old-good" fortran.exe file (without access to the code) and I need to execute a few hundred times using a batch file. However, at the end of the fortran program, it prints "Press ENTER to exit" , interrupting, of course, the execution of the batch file... Is there a way to send the {ENTER} to the running program? 回答1: check the sendkeys.bat. The script is capable to send a keys to running program with particular title: call sendkeys.bat "fortran-program" "{ENTER}" EDIT try with

问题 I'm trying to use the late binding on the commit-interval attribute of a chunk. When the chunk doesn't contain a skip-policy or retry-policy, it works fine but as soon as a skip-policy is added (or even a retry-policy), the commit-interval is not taken into account and the batch works as if the commit-interval is set to 1. The weird thing is, when the commit-interval is hard coded, it works fine... So this configuration works fine : <chunk reader="multiAccuseReceptionItemReader" processor=

问题 I have made this batch script which will allow the user to enter a website's URL as well as a time in minutes, it then adds the URL to the hosts file and removes it once the time expires. (Effectively blocking a website for a certain amount of time) It removes the website from the hosts file by creating another batch file when it is first run, and then uses the AT command to launch the new batch file at the specified time. It works when blocking multiple websites, the only problem is if more

问题 How would you go about executing several SQL statements (script mode) with python? Trying to do something like this: import MySQLdb mysql = MySQLdb.connect(host='host...rds.amazonaws.com', db='dbName', user='userName', passwd='password') sql = """ insert into rollout.version (`key`, `value`) VALUES ('maxim0', 'was here0'); insert into rollout.version (`key`, `value`) VALUES ('maxim1', 'was here1'); insert into rollout.version (`key`, `value`) VALUES ('maxim2', 'was here1'); """ mysql.query

问题 My current scenario: I have 10000 records as input to batch . As per my understanding, batch is only for record-by-record processing.Hence, i am transforming each record using dataweave component inside batch step(Note: I havenot used any batch-commit) and writing each record to file. The reason for doing record-by-record processing is suppose in any particular record, there is an invalid data, only that particular record gets failed, rest of them will be processed fine. But in many of the

问题 We have a cluster with 2 JBOSS nodes. We have a batch job which loads all users details from a active directory to a DB. This job is run everyday. It was run before in a non clustered environment and hence we designed it as a singleton. Now we have a clustered environment and I do not know what is best way to achieve the same result. I want batch job to be run only once a day. We use spring and hibernate and I looked at Spring batch. I could not get any concise answer to my question. Can