投稿時間:2022-11-12 19:10:31 RSSフィード2022-11-12 19:00 分まとめ(16件)

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python	Pythonタグが付けられた新着投稿 - Qiita	複数のconda仮想環境に異なるバージョンのTensorFlowをインストールする	https://qiita.com/psymonmarkrine/items/e6b38b5eb7e21b004dc9	conda	2022-11-12 18:34:29
Azure	Azureタグが付けられた新着投稿 - Qiita	TerraformでセットアップされたAKSのVMサイズをダウンタイムなしで変更する方法	https://qiita.com/dg4101/items/66cc4cab4c3fc5abee87	resour	2022-11-12 18:28:20
技術ブログ	Developers.IO	[アップデート] CloudWatch Logs エクスポート機能が出力先として SSE-KMS 暗号化 S3 バケットをサポートしました	https://dev.classmethod.jp/articles/amazon-cloudwatch-logs-supports-export-sse-kms-encrypted-s3-buckets/	amazoncloudwatchlo	2022-11-12 09:09:17
海外TECH	DEV Community	Spring Batch Part 2 for Beginners- The Domain Language of Spring Batch	https://dev.to/codeitout_/spring-batch-part-2-for-beginners-the-domain-language-of-spring-batch-1enc	Spring Batch Part for Beginners The Domain Language of Spring BatchLet s start with this diagram which highlights the key concepts which make up the domain language of spring batch Let s start understanding each of these concepts in detail JobIt is an entity which encapsulates entire batch process It is wired together with the help of some configuration file XML Java based which is called as job configuration Job is on top of the hierarchy It is a container for Step instances This diagram will be explained in subsequent steps  Job contains multiple steps in it and orders up the steps in the order of their execution It applies the configuration globally on all steps like the restorabilityThe Job Configuration containsName of JobDefination and ordering of step instances restartability of JobHere if we see footballJob is the Job name  playerLoad gameLoad playerSummarization are all steps    start tells the job to start the playerLoad step and once its completed  next tells the Job to run the gameLoad step and once it s completed playerSummariztion step will be executed Job InstanceIt refers to the concept of logical Job run Let s understand in simple words Suppose you have a EOD job to fill the data from table to other table based on today s date There is only one EOD Job But each day you have to run the Job with it s own parameters In the case of this job there is one logical Job Instance per day There is Jan run Jan run and so on If the Jan run fails we trigger it again Its still the Jan run Here we saw that a Job instance can have multiple executions Job executions But only a single Job instance wrt the Job with it s set of parameters can be run at a given time Starting a new Job instance means start from the beginning whereas using an existing instance means starting from where we left off Job ParametersHow do we distinguish one Job instance from the other It holds a set of parameters which is used to start a Job Something similar to passing arguments to a function In the earlier case where we had a Job instance for Jan and one more for Jan It is a single job but it is differentiated based on the Job parameters Jan would have started based the date parameter as Jan and Jan run would have the date parameter as Jan Job instance Job Identifying parametersJob ExecutionIt refers to the concept of single attempt to run a job Job instance can be executed multiple times This is called as execution The execution may result in failure or completion but the Job instance corresponding to an execution will be considered as complete only when that execution is successful Wrt to the EOD job it might be possible that the st execution of Jan Job instance failed If it was run again with same job parameters  a new Job execution is created There are few Job execution properties like status startTime endTime exitStatus executionContext etc These properties are persisted and can be use to check the status of the Execution Just assume that the developer took that entire day to figure out the issue The next window for the execution of Job opened up again at pm and this time she has run the Job instance of Jan and it s successful at pm And since it is the second day we must run the Job for Jan as well So we started the Job instance at pm and it ends at pmThere is no need to start the job instance one after the other if they don t access the same data otherwise they might end up in locking the dbSince job instances are run we should have one more entry in the INSTANCE table and extra entries in Job execution table StepA step is a domain object which encapsulates an independent sequential phase of batch job Each job may have multiple steps to facilitate the batch processing It is totally dependent on the developer on how complex each step might be It can be as simple as fetching from db or complex as performing heavy operations on db using business logic etc Similar to Job each Step has an StepExecution Step ExecutionIt represents single attempt to execute a step A new Step Execution is created each time a step is run If the step fails to execute because of the failing of step prior to it no execution is persisted for it Each step execution contains an ExecutionContext which contains data needed by the developer be persisted across the batch runs For eg state info needed to restart Some Step Execution properties are status startTime endTime exitStatus executionContext etc Execution ContextIt represents a collection of key value pairs that are persisted and controlled by the framework in order to allow developers a place to store persistent data that is scoped to a step execution obj or a job execution object Eg executionContext putLong getKey LINES READ COUNT reader getPosition Let s suppose you are reading lines from a file Here LINES READ COUNT is the key and the value will be set by the developer through the code This key value pair is stored in the metadata table which can be easily accessed accross the different steps of a Job In this case the step failed after processing lines allowing the step to start again from the same line where it left off Exactly execution Context must be there per step execution There should be at least execution context per job execution per step execution Here it checks if executionContext has LINES READ COUNT If it s present then lineCount fetches it and stores the value corresponding to the Lines Read Count It then starts reading data from the next lines in the file Thus execution context saved the time extra processing here as it has stored the data of already read lines Job RepositoryIt provides CRUD operations for Job launcher Job and Step implementations When a job is first launched Job execution is obtained from the repository And during the process of job execution and step execution other data is also persisted in it which can be used by the developer All the metaData tables are part of this repository You can also change the default names of these tables EnableBatchProcessing gives a JobRepository automatically configured Job LauncherIt is a simple interface for launching a Job with set of Job parameters public interface JobLauncher  public JobExecution run Job job JobParameters jobParameters  throws JobExecutionAlreadyRunningException JobRestartException  JobInstanceAlreadyCompleteException JobParametersInvalidException Item ReaderIt is abstract class which represents retrieval of input for a step When item reader has exhausted the retrieval of data it returns null Item WriterIt is an abstract class representing output of a step one batch or chunk at a time It has no knowledge of pervious or next input which it takes It knows only the item which was passed in the current invocation ItemProcessorIt is an abstraction which represents the business processing of data It acts as a place of transformation of input data received from item reader to output of item writer If the data processed is not valid it returns null which means the item writer won t include it while producing the output If you prefer watching video  you can follow this link So now you know what to do If you found this useful you know what to do now Hit that clap button and follow me to get more articles and tutorials on your feed	2022-11-12 09:20:38
海外ニュース	Japan Times latest articles	Biden to warn Xi that North Korea’s path could prompt bigger U.S. military presence	https://www.japantimes.co.jp/news/2022/11/12/asia-pacific/politics-diplomacy-asia-pacific/us-china-joe-biden-xi-jinping-north-korea/	Biden to warn Xi that North Korea s path could prompt bigger U S military presenceThe U S leader will meet his Japanese and South Korean counterparts ahead of the China talks and are expected to release a statement pledging an	2022-11-12 18:10:21
ニュース	BBC News - Home	New Zealand 34-31 England: Black Ferns win World Cup with dramatic victory	https://www.bbc.co.uk/sport/rugby-union/63605799?at_medium=RSS&at_campaign=KARANGA	New Zealand England Black Ferns win World Cup with dramatic victoryEngland s winning streak comes to an end as New Zealand win the World Cup for a sixth time on a historic night for women s rugby at Eden Park	2022-11-12 09:09:58
ニュース	BBC News - Home	Dalgety Bay: How do you clean all the sand on a radioactive beach?	https://www.bbc.co.uk/news/uk-scotland-edinburgh-east-fife-63515856?at_medium=RSS&at_campaign=KARANGA	beach	2022-11-12 09:09:25
ニュース	BBC News - Home	The men reading poetry at Dundee's lonely funerals	https://www.bbc.co.uk/news/uk-scotland-tayside-central-63598433?at_medium=RSS&at_campaign=KARANGA	funeralsa	2022-11-12 09:09:07
ビジネス	不景気.com	仮想通貨交換業大手の「FTX」が破産法第11章を申請 - 不景気com	https://www.fukeiki.com/2022/11/ftx-trading-chapter11.html	仮想通貨	2022-11-12 09:04:12
北海道	北海道新聞	ＣＯＰ２７、首脳の対応割れる　欧米は積極、岸田氏は不参加	https://www.hokkaido-np.co.jp/article/759686/	気候変動	2022-11-12 18:15:34
北海道	北海道新聞	蝉川が首位に浮上、星野陸ら２位　三井住友太平洋マスターズ第３日	https://www.hokkaido-np.co.jp/article/759690/	三井住友	2022-11-12 18:12:00
北海道	北海道新聞	冬のボーナス、１～３％増予測　伸び率拡大、企業間格差も	https://www.hokkaido-np.co.jp/article/759657/	人当たり	2022-11-12 18:12:01
北海道	北海道新聞	トヨタ水素エンジン車がデモ走行　世界ラリーで脱炭素を披露	https://www.hokkaido-np.co.jp/article/759689/	開発中	2022-11-12 18:11:00
北海道	北海道新聞	トヨタの勝田が総合４位に浮上　ラリー・ジャパン第３日	https://www.hokkaido-np.co.jp/article/759688/	世界ラリー選手権	2022-11-12 18:11:00
北海道	北海道新聞	東京で８０２１人がコロナ感染　前週比１４１％、３人死亡	https://www.hokkaido-np.co.jp/article/759687/	新型コロナウイルス	2022-11-12 18:05:00
ビジネス	東洋経済オンライン	宇宙で急病になったらどうする？健康管理の実態 専門知識を持つ医師･フライトサージャンとは | 宇宙 | 東洋経済オンライン	https://toyokeizai.net/articles/-/628643?utm_source=rss&utm_medium=http&utm_campaign=link_back	国際宇宙ステーション	2022-11-12 18:30:00