You are viewing the documentation for Play 1. The documentation for Play 2 is here. JPA æ°¸ç¶åPlay ã¯ãJPA ã¨ã³ãã£ãã£ã®ç®¡çã容æã«ããã¨ã¦ã便å©ãªä¸é£ã®ãã«ããæä¾ãã¾ãã ãã¤ã§ãç´ ã® JPA API ã«ç«ã¡è¿ããã¨ãã§ãããã¨ã« 注æ ãã¦ãã ããã JPA ã¨ã³ãã£ãã£ããã¼ã¸ã£ã®éå§Playã¯ã @javax.persistence.Entity ã¢ããã¼ã·ã§ã³ã§æ³¨éãããã¯ã©ã¹ãã²ã¨ã¤ä»¥ä¸è¦ã¤ããå ´åãèªåçã« Hibernate ã¨ã³ãã£ãã£ããã¼ã¸ã£ãéå§ãã¾ããã¨ã¯è¨ããJDBC ãã¼ã¿ã½ã¼ã¹ãæ£ããè¨å®ãã¦ããªãå ´åãã¨ã³ãã£ãã£ããã¼ã¸ã£ã®éå§ã¯å¤±æãã¦ãã¾ãã®ã§ã確å®ã«è¨å®ãã¦ãã ããã JPA ã¨ã³ãã£ãã£ããã¼ã¸ã£ã®åå¾JPA ã¨ã³ãã£ãã£ããã¼ã¸ã£ãéå§ããã¦ãã
JPAã®ãã©ã³ã¶ã¯ã·ã§ã³ã«ã¤ãã¦ã¾ã¨ãã¾ããã ã¨ã³ãã£ãã£ããã¼ã¸ã£ã®ç¨®é¡ ã³ã³ãã管ç EJBã³ã³ãããã©ã¤ããµã¤ã¯ã«ã管ç DI or JNDI lookupã«ããåå¾ ã¢ããªã±ã¼ã·ã§ã³ç®¡ç ã¢ããªã±ã¼ã·ã§ã³ã®ã³ã¼ãä¸ã§çæã»ç ´æ£ EntityManagerFacutory # createEntityManager() ã«ããçæ EntityManager # close() ã§ç ´æ£ ã¨ã³ãã£ãã£ããã¼ã¸ã£ãå©ç¨ã§ãããã©ã³ã¶ã¯ã·ã§ã³ããã¼ã¸ã£ã®ç¨®é¡ JTAãã©ã³ã¶ã¯ã·ã§ã³ èªåçã«EJBã³ã³ãã管çã®JTAãã©ã³ã¶ã¯ã·ã§ã³ã«åå ãããã¨ãã§ãã JPAè¨å®ãã¡ã¤ã«(persistence.xml)ã«ãtransaction-typeã¨ãã¦"JTA"ãæå®ãã ãªã½ã¼ã¹ãã¼ã«ã«ãã©ã³ã¶ã¯ã·ã§ã³ DBã®æã¤ãã©ã³ã¶ã¯ã·ã§ã³ç®¡çæ©è½ãç´æ¥ä½¿ç¨ãã EntityManager # ge
Entity Graphs ã¨ã¯ Entity Graph ã®æ§æ Graph ã¢ããã¼ã·ã§ã³ã¨ Graph API ç°¡åãªå©ç¨ä¾ Fetch Graph 㨠Load Graph Attribute Node ã®å®ç¾© Subgraph ã®å®ç¾© Subgraph ã®è¤æ°åç § ç¶æ¿æ§é ã® Graph å®ç¾© ã«ã¼ãç¶æ¿æ§é ã® Graph Map Key Subgraphs ã¿ã¤ãã»ã¼ããªå±æ§å®ç¾© Entity Graph ã®åå¾ ååä»ãã® Entity Graph ã¸ã®è¿½å Entity Graph ã®å©ç¨ Entity Graphs ã¨ã¯ JPA 2.1 ã§ã¯ Entity Graph ã使ããã¨ã§ fetch è¨ç»ãæå®ã§ããããã«ãªãã¾ãããããã«ãã query ã find ã§åå¾ãã対象ããã«ã¹ã¿ãã¤ãºã§ããããã«ãªãã¾ããåã Entity ããæ§ã ãªãã¼ã¿ã®è¦ãæ¹ãå¿ è¦ã§ãæ
OutOfMemoryErrorã®ä¸»ãªè¦å ä¾ã¨ãã¦ãDBMSãããã¼ã¿ãåå¾ããããããã¾ãã LASYãã§ããã«ããN + 1 åé¡ãåé¿ããããã«ãçµåå ãã¼ãã«ã®è¦ç´ ãä¸æ°ã«æã£ã¦ããJOIN FETCHã使ã£ãã¨ãããå¼ãæãã«Javaãã¼ã使ç¨éãå¤ããªãã®ã¯ããããã±ã¼ã¹ã§ãã 以ä¸ã®ãããªã1ã¤ã®Issueã«å¯¾ãã¦è¤æ°ã®IssueAttributeãæã¤1対å¤é¢é£ã®ã¨ã³ãã£ãã£ã®æä½ãä¾ã«ãOutOfMemoryErrorãå°ãã§ãé¿ããæ¹æ³ãèãã¦ã¿ã¾ãã @Entity public class Issue implements Serializable { private static final long serialVersionUID = 1L; @Id @GeneratedValue private int issueId; private String tit
ã¯ããã« ããã¯JPAã解説ããé£è¼ã®5åç®ã§ãã ãã£ããããã¨ãJPQLã§ã¯äºæããªãã£ã大éã®SQLãçºè¡ããã¦ãã¾ãå ´åãããã¾ãããã㯠âN+1â åé¡ã¨è¨ããã¦ãããã®ã§ããã解決ã®ããã«ã¯æ¬¡ã®ãããªï¼ã¤ã®é¸æè¢ãããã¾ãã JPQLã§JOIN FETCHã使ã Criteria APIï¼JPQLãããã°ã©ã ã¨ãã¦æ¸ãï¼ã§Fetch Joinãè¨è¿°ãã Named Entithy Graph ã使ã Dynamic Entity Graph ã使ã ããã§ã¯ã1.ã®JPQLã«ããæ¹æ³ã«ã¤ãã¦è§£èª¬ãã¾ããã¾ãããã®ã»ãã®æ¹æ³ãããã®å¾ã®ç« ã§é 次ã詳ãã解説ããäºå®ã§ãã N+1åé¡ã¨ã¯ 次ã®ãããªå ·ä½çãªä¾ã§èãã¾ãããã // ãã¹ã¦ã®Employeeã¨ã³ãã£ãã£ãå¾ã TypedQuery<Employee> query = em.createQuery("SELECT e
The detail of JPA 20 1. Java Persistence API ã®è©³ç´°ã¤ãã¦æ¥æ¬ãªã©ã¯ã« Fusion Middleware 製åäºæ¥çµ±æ¬æ¬é¨ã·ã㢠Java ã¨ãã³ã¸ã§ãªã¹ã寺ç°â佳央 (http://yoshio3.com) 1 | Copyright © 2011, Oracle and/or itâs affiliates. All rights reserved. 2. 以ä¸ã®äºé ã¯ãå¼ç¤¾ã®ä¸è¬çãªè£½åã®æ¹åæ§ã«é¢ããæ¦è¦ã説æãããã®ã§ããã¾ããæ å ±æä¾ãå¯ä¸ã®ç®çã¨ãããã®ã§ããããããªãå¥ç´ã«ãçµã¿è¾¼ããã¨ã¯ã§ãã¾ããã以ä¸ã®äºé ã¯ããããªã¢ã«ãã³ã¼ããæ©è½ãæä¾ãããã¨ãã³ãããã¡ã³ãï¼ç¢ºç´ï¼ãããã®ã§ã¯ãªãããã購買決å®ãè¡ãéã®å¤æææã«ãªãããªãã§ä¸ããããªã©ã¯ã«è£½åã«é¢ãã¦è¨è¼ããã¦ããæ©è½ã®éçºããªãªã¼ã¹ããã³ææã«ã¤ãã¦ã¯ãå¼ç¤¾ã®è£é
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I want to output the SQL generated by EclipseLink to the console, during development. However, I could only do so using the logging level FINE. I have a complex domain model composed of many classes, so much that deployment takes a considerable ammount of time when the log verbosity is on the FINE level, since EclipseLink outputs its analysis of the whole model. Is there a way to get the SQL witho
åã¨ã³ããªã§ãNativeQueryã»JPQLã»CriteriaAPIã®ã©ããä¸çªéãã®ãããã©ã¼ãã³ã¹æ¯è¼ãè¡ããNativeQueryæªããªãããããã¨çµè«ã¥ãã¾ãããããã¦ãJavaEE AdventCalendar 2013ãåãã¾ã¨ãã¦é ãã@megascusãããããã®ãã¿ãæ¸ãçºç«¯ã¨ãªã£ã@yoshioteradaãããå§ãã¨ããå¤ãã®æ¹ã ã«ã³ã¡ã³ããé ãã¾ããããããã¨ããããã¾ããã ãã®ä¸ã§ãJPQLãNamedQueryã§å®£è¨ãã¦ããã¨ãèµ·åæã«ããªã³ã³ãã¤ã«ãããã®ã§ããã©ã¼ãã³ã¹ãåä¸ãããã¨ã®æ å ±ãé ããã®ã§ãåå®é¨ãã¦ã¿ã¾ããã ä»å使ç¨ããã½ã¼ã¹ã¯ãã¡ã ååã¨ã®å·®åãç°¡åã«æ¯ãè¿ã£ã¦ããã¨ãã¾ããJPQLæãfindProductã¨ããååãã¤ãã¦ãEntityã¯ã©ã¹ã«NamedQueryã¨ãã¦å®£è¨ãã¾ããã @Entity @Table(name="pr
ç°å¢æ§ç¯ JPA ã®åºæ¬çãªè©± JPQL ã®è©± Criteria API ã®è©± ã³ã¼ã ãããã³ã°æ¹æ³ã ãã確èªããããããã«ããä¸è¦§ãä½æãã¾ããã JPA ãããã³ã°ã«ã¿ãã° - Qiita ã¯ããã« ãªãã¸ã§ã¯ãæåã§èãããããã¡ã¤ã³ã¢ãã«ã¨ãæ£è¦åãªã©ãèæ ®ãã¦èãããããªã¬ã¼ã·ã§ãã«ãã¼ã¿ãã¼ã¹ã®ãã¼ãã«ã§ã¯ããã¼ã¿ã®æããæ¹ã«éããçã¾ããã ãã®éããã¤ã³ãã¼ãã³ã¹ãã¹ãããã¨è¨ãã ã¤ã³ãã¼ãã³ã¹ãã¹ãããã解決ããã«ã¯ããã¼ã¿ãã¼ã¹ããåå¾ããã¬ã³ã¼ãããªãã¸ã§ã¯ãã«ãããã³ã°ããå¦çãå¿ è¦ã«ãªãï¼ããã«ãæ°¸ç¶åããã¨ãã¯éå¤æãå¿ è¦ï¼ã ãªãã¸ã§ã¯ãã¨ãã¼ãã«ã®æ§é ãï¼å¯¾ï¼ã§å¯¾å¿ãã¦ããã°ããã®å¤æã¯ããã¾ã§å¤§å¤ã§ã¯ãªãã ããããããã§ãªãå ´åãå¤æãèªåã§å®è£ ããã®ã¯é常ã«éª¨ãæããã O/R ãããã¼ã¯ãã®å¤æãèªåã§ãã£ã¦ããããã¬ã¼ã ã¯ã¼ã¯ã§ã JPA ã§ã¯
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Everything goes into this Blog. I will share my views of current issues, IT project experiences (technical view) , my hobbies and etc into my blog. I will try my best to update it frequently. I been trying to debug the following error for days, and it drive me nuts! The problem: JPA refuse to compile one of my NamedQuery, and throws the following error: Error compiling the query [UserVO.findByUser
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