http://www.dzone.com/links/users/links/131196.html DZone: fresh links for developers en-us Copyright (c) 2006 DZone, Inc. Thu, 21 Aug 2008 22:56:00 GMT The DZone community 2008-08-21T22:56:00Z en-us Copyright (c) 2006 DZone, Inc. http://www.dzone.com/links/feed/user/131196/rss.xml http://www.dzone.com/images/std/dzone.com_258x55.gif http://www.dzone.com/links/ http://www.dzone.com/links/rss/java_persistence_dao_manager.html The DAO Manager is a solution to some of the DAO design problems developers often run into when designing DAO layers. It is similar in effect to declarative transaction demarcation, but works for connection life spans too. It can also help you do lazy connection opening, so connections are opened as late as posible, even when using dependency injection. In addition it serves as a single point of access for all your DAO's in your application. database frameworks how-to java Thu, 31 Jul 2008 14:03:11 GMT http://www.dzone.com/links/99648.html Jakob Jenkov 2008-07-31T14:03:11Z The DAO Manager is a solution to some of the DAO design problems developers often run into when designing DAO layers. It is similar in effect to declarative transaction demarcation, but works for connection life spans too. It can also help you do lazy connection opening, so connections are opened as late as posible, even when using dependency injection. In addition it serves as a single point of access for all your DAO's in your application.]]> 99648 2008-07-31T08:33:14Z 2008-07-31T14:03:11Z 6 0 347 4 http://www.dzone.com/links/images/thumbs/120x90/99648.jpg jj83777 http://www.dzone.com/links/images/avatars/131196.gif http://www.dzone.com/links/rss/butterfly_persistence_500_aka_mr_persister_g2.html Butterfly Persistence is a cleaned up version of Mr Persister 4.0.0 which has been out since 2004, and had more than 5000 downloads. Butterfly Persistence is a simple Java persistence API that makes trivial JDBC tasks much easier... more advanced than Spring JDBC templates. database frameworks java open source Thu, 31 Jul 2008 07:19:24 GMT http://www.dzone.com/links/99482.html Jakob Jenkov 2008-07-31T07:19:24Z Butterfly Persistence is a cleaned up version of Mr Persister 4.0.0 which has been out since 2004, and had more than 5000 downloads. Butterfly Persistence is a simple Java persistence API that makes trivial JDBC tasks much easier... more advanced than Spring JDBC templates.]]> 99482 2008-07-30T17:54:00Z 2008-07-31T07:19:24Z 6 0 167 4 http://www.dzone.com/links/images/thumbs/120x90/99482.jpg jj83777 http://www.dzone.com/links/images/avatars/131196.gif http://www.dzone.com/links/rss/dao_design_problems.html The Data Access Object (DAO) pattern is now a widely accepted mechanism to abstract away the details of persistence in an application. In practice however, it itsn't always that easy to make your DAO's fully hide the underlying persistence layer. For instance, when a transaction span calls to multiple DAO's, where do you put the transaction demarcation code? This text will take a closer look at this and other problems and their solutions. database frameworks how-to java Wed, 30 Jul 2008 09:41:30 GMT http://www.dzone.com/links/99272.html Jakob Jenkov 2008-07-30T09:41:30Z The Data Access Object (DAO) pattern is now a widely accepted mechanism to abstract away the details of persistence in an application. In practice however, it itsn't always that easy to make your DAO's fully hide the underlying persistence layer. For instance, when a transaction span calls to multiple DAO's, where do you put the transaction demarcation code? This text will take a closer look at this and other problems and their solutions.]]> 99272 2008-07-30T05:16:50Z 2008-07-30T09:41:30Z 20 0 625 0 http://www.dzone.com/links/images/thumbs/120x90/99272.jpg jj83777 http://www.dzone.com/links/images/avatars/131196.gif http://www.dzone.com/links/rss/java_concurrency_anatomy_of_a_synchronizer.html Text no 21 in the Java Concurency series analyzes the design traits that most synchronizers (locks, semaphores, blocking queues etc.) have in common. Knowing these traits can be useful when implementing custom synchronizers, as these will most likely contain the same basic parts as most other synchronizers. how-to java research Wed, 09 Jul 2008 11:14:42 GMT http://www.dzone.com/links/93616.html Jakob Jenkov 2008-07-09T11:14:42Z Text no 21 in the Java Concurency series analyzes the design traits that most synchronizers (locks, semaphores, blocking queues etc.) have in common. Knowing these traits can be useful when implementing custom synchronizers, as these will most likely contain the same basic parts as most other synchronizers.]]> 93616 2008-07-09T10:11:14Z 2008-07-09T11:14:42Z 11 0 309 2 http://www.dzone.com/links/images/thumbs/120x90/93616.jpg jj83777 http://www.dzone.com/links/images/avatars/131196.gif http://www.dzone.com/links/rss/java_multithreaded_servers_thread_pooled_server.html This is text no. 4 in a series on multithreaded servers in Java. This text describes a thread pooled server design. Earlier designs shown in this trail are a singlethreaded and a thread-per-connection design. The series will get more server designs in the future. how-to java server Fri, 04 Jul 2008 06:57:29 GMT http://www.dzone.com/links/92337.html Jakob Jenkov 2008-07-04T06:57:29Z This is text no. 4 in a series on multithreaded servers in Java. This text describes a thread pooled server design. Earlier designs shown in this trail are a singlethreaded and a thread-per-connection design. The series will get more server designs in the future.]]> 92337 2008-07-03T15:55:49Z 2008-07-04T06:57:29Z 11 0 328 3 http://www.dzone.com/links/images/thumbs/120x90/92337.jpg jj83777 http://www.dzone.com/links/images/avatars/131196.gif http://www.dzone.com/links/rss/multithreaded_server_in_java.html This is text no. 3 in a series on implementing multithreaded servers in Java. So far the trail discusses a singlethreaded and a simple multithreaded server design. The material covered is still basic, but the trail is growing and soon several more designs will be covered. how-to java server Thu, 03 Jul 2008 00:23:54 GMT http://www.dzone.com/links/92086.html Jakob Jenkov 2008-07-03T00:23:54Z This is text no. 3 in a series on implementing multithreaded servers in Java. So far the trail discusses a singlethreaded and a simple multithreaded server design. The material covered is still basic, but the trail is growing and soon several more designs will be covered.]]> 92086 2008-07-02T17:35:08Z 2008-07-03T00:23:54Z 11 0 480 4 http://www.dzone.com/links/images/thumbs/120x90/92086.jpg jj83777 http://www.dzone.com/links/images/avatars/131196.gif http://www.dzone.com/links/rss/java_concurrency_locks.html This text is no. 14 in a series on Java Concurrency. It covers how to implement and use custom thread locks in Java. It also covers lock reentrance. Even if Java 5 includes several lock implementations it can still be useful to know the theory behind their implementation. how-to java Thu, 05 Jun 2008 13:56:25 GMT http://www.dzone.com/links/85289.html Jakob Jenkov 2008-06-05T13:56:25Z This text is no. 14 in a series on Java Concurrency. It covers how to implement and use custom thread locks in Java. It also covers lock reentrance. Even if Java 5 includes several lock implementations it can still be useful to know the theory behind their implementation.]]> 85289 2008-06-05T09:15:13Z 2008-06-05T13:56:25Z 14 0 244 1 http://www.dzone.com/links/images/thumbs/120x90/85289.jpg jj83777 http://www.dzone.com/links/images/avatars/131196.gif http://www.dzone.com/links/rss/java_concurrency_slipped_conditions.html This text is no. 13 in a series on Java Concurrency. It explains the problem of slipped conditions, how it may occur in Java, and shows a few hints to what you can do to avoid it. how-to java Tue, 03 Jun 2008 17:43:47 GMT http://www.dzone.com/links/84744.html Jakob Jenkov 2008-06-03T17:43:47Z This text is no. 13 in a series on Java Concurrency. It explains the problem of slipped conditions, how it may occur in Java, and shows a few hints to what you can do to avoid it.]]> 84744 2008-06-03T13:54:27Z 2008-06-03T17:43:47Z 19 0 288 0 http://www.dzone.com/links/images/thumbs/120x90/84744.jpg jj83777 http://www.dzone.com/links/images/avatars/131196.gif http://www.dzone.com/links/rss/java_concurrency_nested_monitor_lockout.html This text is no. 12 in a series on Java Concurrency. It explains what Nested Monitor Lockout is, how it can occur in Java, and what you can do to avoid it. how-to java Mon, 02 Jun 2008 15:29:24 GMT http://www.dzone.com/links/84414.html Jakob Jenkov 2008-06-02T15:29:24Z This text is no. 12 in a series on Java Concurrency. It explains what Nested Monitor Lockout is, how it can occur in Java, and what you can do to avoid it.]]> 84414 2008-06-02T09:26:06Z 2008-06-02T15:29:24Z 10 0 265 0 http://www.dzone.com/links/images/thumbs/120x90/84414.jpg jj83777 http://www.dzone.com/links/images/avatars/131196.gif http://www.dzone.com/links/rss/java_concurrency_starvation_and_fairness.html This text is no. 11 in a series on Java Concurrency. This text decribes what starvation of threads is, how it can happen in Java, and what you can do to decrease the probability of starvation happening. In other words, what you can do to implement fairness. how-to java Tue, 20 May 2008 00:01:01 GMT http://www.dzone.com/links/81671.html Jakob Jenkov 2008-05-20T00:01:01Z This text is no. 11 in a series on Java Concurrency. This text decribes what starvation of threads is, how it can happen in Java, and what you can do to decrease the probability of starvation happening. In other words, what you can do to implement fairness.]]> 81671 2008-05-19T09:59:28Z 2008-05-20T00:01:01Z 9 0 433 2 http://www.dzone.com/links/images/thumbs/120x90/81671.jpg jj83777 http://www.dzone.com/links/images/avatars/131196.gif http://www.dzone.com/links/rss/butterfly_container_220.html This is the announcement of Butterfly Container 2.2.0 - an attempt to create a very small DI container without sacrificing any advanced functionality. frameworks how-to java news Tue, 13 May 2008 22:35:03 GMT http://www.dzone.com/links/80748.html Jakob Jenkov 2008-05-13T22:35:03Z This is the announcement of Butterfly Container 2.2.0 - an attempt to create a very small DI container without sacrificing any advanced functionality.]]> 80748 2008-05-13T11:56:09Z 2008-05-13T22:35:03Z 8 0 257 2 http://www.dzone.com/links/images/thumbs/120x90/80748.jpg jj83777 http://www.dzone.com/links/images/avatars/131196.gif http://www.dzone.com/links/rss/java_concurrency_thread_signaling.html This text is no. 10 in a series on Java concurrency. This text describes how threads can send signals to each other, and wait for each other's signals, using wait(), notify(), and notifyAll(). The text also describes the problems of busy wait, missed signals and spurious wakups, and prescribes solutions to these problems. how-to java Wed, 07 May 2008 18:29:03 GMT http://www.dzone.com/links/79670.html Jakob Jenkov 2008-05-07T18:29:03Z This text is no. 10 in a series on Java concurrency. This text describes how threads can send signals to each other, and wait for each other's signals, using wait(), notify(), and notifyAll(). The text also describes the problems of busy wait, missed signals and spurious wakups, and prescribes solutions to these problems.]]> 79670 2008-05-07T06:47:02Z 2008-05-07T18:29:03Z 15 0 621 5 http://www.dzone.com/links/images/thumbs/120x90/79670.jpg jj83777 http://www.dzone.com/links/images/avatars/131196.gif http://www.dzone.com/links/rss/java_exception_handling_checked_or_unchecked_exce.html This text discusses the differences between checked and unchecked exceptions in Java, and argues that unchecked exceptions are often a cleaner alternative. The text finishes with references to Anders Hejlsberg (creator of C#) and James Goslings (creator of Java)'s interviews on the subject at artima.com .net how-to java trends Tue, 06 May 2008 11:28:02 GMT http://www.dzone.com/links/79326.html Jakob Jenkov 2008-05-06T11:28:02Z This text discusses the differences between checked and unchecked exceptions in Java, and argues that unchecked exceptions are often a cleaner alternative. The text finishes with references to Anders Hejlsberg (creator of C#) and James Goslings (creator of Java)'s interviews on the subject at artima.com]]> 79326 2008-05-05T13:27:40Z 2008-05-06T11:28:02Z 10 0 570 14 http://www.dzone.com/links/images/thumbs/120x90/79326.jpg jj83777 http://www.dzone.com/links/images/avatars/131196.gif http://www.dzone.com/links/rss/deadlock_prevention.html This text is no. 9 in a series of texts on Java concurrency. This text describes 3 deadlock prevention methods: Lock ordering, lock time out, and deadlock detection. Though the text does not show implementations (later texts in this trail may do so), the discussion should be enough to give the reader an idea of a few ways deadlocks can be prevented. how-to java Wed, 23 Apr 2008 06:25:39 GMT http://www.dzone.com/links/76896.html Jakob Jenkov 2008-04-23T06:25:39Z This text is no. 9 in a series of texts on Java concurrency. This text describes 3 deadlock prevention methods: Lock ordering, lock time out, and deadlock detection. Though the text does not show implementations (later texts in this trail may do so), the discussion should be enough to give the reader an idea of a few ways deadlocks can be prevented.]]> 76896 2008-04-21T15:26:09Z 2008-04-23T06:25:39Z 14 0 383 0 http://www.dzone.com/links/images/thumbs/120x90/76896.jpg jj83777 http://www.dzone.com/links/images/avatars/131196.gif http://www.dzone.com/links/rss/butterfly_container_and_guice_performance.html How much overhead does a dependency injection container add compared to instantiation via 'new' or plain reflection? This performance test measures the overhead of Butterfly Container and compares it to Google Guice. It seems as if Butterfly Container can get as low as 30% overhead. It also seems as if Butterfly Container has a factor 2 to 4 performance advantage over Guice. frameworks java open source Tue, 19 Feb 2008 21:36:50 GMT http://www.dzone.com/links/67062.html Jakob Jenkov 2008-02-19T21:36:50Z How much overhead does a dependency injection container add compared to instantiation via 'new' or plain reflection? This performance test measures the overhead of Butterfly Container and compares it to Google Guice. It seems as if Butterfly Container can get as low as 30% overhead. It also seems as if Butterfly Container has a factor 2 to 4 performance advantage over Guice.]]> 67062 2008-02-19T21:36:50Z 2 0 36 0 http://www.dzone.com/links/images/thumbs/120x90/67062.jpg jj83777 http://www.dzone.com/links/images/avatars/131196.gif http://www.dzone.com/links/rss/type_safety_when_using_butterfly_container_or_spr.html Does Spring XML / Groovy Builder and Butterfly Container Script really sacrifice type safety? This text in the Butterfly Container documentation discusses this topic. What is your opinion? frameworks java open source opinion Tue, 19 Feb 2008 21:28:17 GMT http://www.dzone.com/links/67061.html Jakob Jenkov 2008-02-19T21:28:17Z Does Spring XML / Groovy Builder and Butterfly Container Script really sacrifice type safety? This text in the Butterfly Container documentation discusses this topic. What is your opinion?]]> 67061 2008-02-19T21:28:17Z 3 0 20 0 http://www.dzone.com/links/images/thumbs/120x90/67061.jpg jj83777 http://www.dzone.com/links/images/avatars/131196.gif http://www.dzone.com/links/rss/exception_enrichment_in_java.html Exception enrichment is an exception handling technique which solves the problems of the long stack traces of exception wrapping. Rather than wrap caught exceptions, the original exception is rethrown with some extra context information added. This technique also provides a method to achieve truly unique error codes in an application, making it possible to distinguish exceptions thrown from the same piece of code, but called from different contexts. how-to java Thu, 14 Feb 2008 14:41:11 GMT http://www.dzone.com/links/66274.html Jakob Jenkov 2008-02-14T14:41:11Z Exception enrichment is an exception handling technique which solves the problems of the long stack traces of exception wrapping. Rather than wrap caught exceptions, the original exception is rethrown with some extra context information added. This technique also provides a method to achieve truly unique error codes in an application, making it possible to distinguish exceptions thrown from the same piece of code, but called from different contexts.]]> 66274 2008-02-14T09:10:35Z 2008-02-14T14:41:11Z 18 0 649 9 http://www.dzone.com/links/images/thumbs/120x90/66274.jpg jj83777 http://www.dzone.com/links/images/avatars/131196.gif http://www.dzone.com/links/rss/java_exception_handling_templates.html This new article in the Java Exception Handling trail explains how exception handling code can be encapsulated inside a template, which can be reused again and again throughout your application. This means less to worry about, less bugs, and less code to write afterwards. Frameworks like Spring use Templates all the time. Learn to use them effectively yourself. eclipse java Fri, 07 Dec 2007 10:07:11 GMT http://www.dzone.com/links/56034.html Jakob Jenkov 2007-12-07T10:07:11Z This new article in the Java Exception Handling trail explains how exception handling code can be encapsulated inside a template, which can be reused again and again throughout your application. This means less to worry about, less bugs, and less code to write afterwards. Frameworks like Spring use Templates all the time. Learn to use them effectively yourself.]]> 56034 2007-12-05T20:16:30Z 2007-12-07T10:07:11Z 19 0 1106 6 http://www.dzone.com/links/images/thumbs/120x90/56034.jpg jj83777 http://www.dzone.com/links/images/avatars/131196.gif http://www.dzone.com/links/rss/java_exception_handling_trail.html This trail is a tutorial about Java Exception Handling, and currently contains about 9 texts. In the future more texts will be added about for instance exception handling templates, exception enrichment ect. In other words, everything exception handling related. java Wed, 28 Nov 2007 17:47:48 GMT http://www.dzone.com/links/55010.html Jakob Jenkov 2007-11-28T17:47:48Z This trail is a tutorial about Java Exception Handling, and currently contains about 9 texts. In the future more texts will be added about for instance exception handling templates, exception enrichment ect. In other words, everything exception handling related.]]> 55010 2007-11-28T17:47:48Z 3 0 61 0 http://www.dzone.com/links/images/thumbs/120x90/55010.jpg jj83777 http://www.dzone.com/links/images/avatars/131196.gif