tag:blogger.com,1999:blog-1604594366142210766Thu, 24 Nov 2011 09:00:33 +0000debugbpmreflectionnioactive directoryquartzjdbcmysqljavaalfrescobytebufferchannelauthenticationswingpatternsj2sejunitaopmultithreadingmockluceneplaceholdertomcatcmissyntaxdatelog4jawtuijava6inputstreamldapbloggerSimplify itwebspherespringbamboowasjnlpcollectionshgj2eejcomponentmercurialactivitiexamplessvnsmartgwtBest tips, practices and patternshttp://jajatips.blogspot.com/noreply@blogger.com (dimka)Blogger26125tag:blogger.com,1999:blog-1604594366142210766.post-6991882554567958461Sat, 06 Aug 2011 15:25:00 +00002011-08-06T08:33:36.477-07:00lucenealfrescoMy new problem is not very difficult, but have interesting solution (I think :)). For example we have four objects in our alfresco repository that have next titles: James John Li Joan Johan Jazz Bill For get all objects that begins from 'Joh', I use the next query: +TYPE:"my:object" +@cm\:title:"joh*" The result of the query: James John Johan Jazz Li Joan 'Joan' doesn't contain 'joh' in title.http://jajatips.blogspot.com/2011/08/alfresco-strong-text-search-with.htmlnoreply@blogger.com (dimka)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/kLduTkp-bVQ" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-6447773501111083971Tue, 02 Aug 2011 18:50:00 +00002011-08-04T05:30:35.540-07:00quartzTo initialize (import dictionaries, create system users and roles, etc) our system we use quartz. But yesterday after I've created new job I saw that my new job depends on other jobs. Still I don't get how can I create dependencies over jobs and I think that the usage of dependencies in jobs is an ugly solution. The solution is simply to run jobs sequentially - one by one. But I couldn't find http://jajatips.blogspot.com/2011/08/quartz-running-jobs-sequentially.htmlnoreply@blogger.com (dimka)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/IFkK-i5Uwv0" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-890946908945269388Tue, 28 Jun 2011 10:23:00 +00002011-06-28T03:30:24.263-07:00mercurialbamboohgHi! We use bamboo(v.3) for supports continuum integration in our project and mercurial as control version system. We wrote some core functions for the project and now should test it. Testers want to see what's new we do in new build. For this reason developers should wrote changelog for new build. But we are lazy developers and don't want to do this :) Unfortunately, bamboo can not generate http://jajatips.blogspot.com/2011/06/generate-changelog-from-bamboo-with.htmlnoreply@blogger.com (dimka)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/osVFuXpfNlc" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-5164082396066435858Sat, 30 Apr 2011 06:30:00 +00002011-04-29T23:30:47.108-07:00activitibpmalfrescoAlfresco release new version of their ECM - 3.4.e. Major feature of this release is integration with activiti BPM platform. That's a good news, because JBPM 3 is obsolete. Of course, I try to use it and have some problems ;) In our projects we use WorkflowService to control business processes. To move workflow from one task to another we have to end current task and specify the transition name(http://jajatips.blogspot.com/2011/04/process-workflow-with-alfresco-and.htmlnoreply@blogger.com (dimka)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/u3TyQNJfz_Q" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-3412220246521129007Tue, 16 Nov 2010 15:12:00 +00002010-11-17T06:19:08.338-08:00smartgwtWhen you create smartgwt module you have the following lines in your *.gwt.xml file: ... <inherits name="com.smartgwt.SmartGwt"/> ...Everything works fine. When you load your module at the first time, the browser gets all smartgwt js libs(ISC_*.js) and caches it. In our application we have got five gwt modules and all of them are using smartgwt. And when we load each module for the firsthttp://jajatips.blogspot.com/2010/11/share-smartgwt-js-over-several-gwt.htmlnoreply@blogger.com (dimka)4<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/jb8Yxod2irA" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-5343153241900941010Tue, 09 Nov 2010 08:24:00 +00002010-11-09T04:17:20.228-08:00j2sesyntaxSimplify itFrom time to time we write unoptimized code. For program to be cute it is fun to be optimized.For example this is a possible way to write if sequence:if (p.equals("Completed")){ return true;} else { return false;}But to be optimized the method body should look like this:return "Completed".equals(p);What's really interesting is that it's not only looking good. Indeed it helps you to evade nullhttp://jajatips.blogspot.com/2010/11/simplify-if.htmlnoreply@blogger.com (XithyL)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/Pyfdsze4CCo" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-7166962328320194485Thu, 04 Nov 2010 19:46:00 +00002010-11-07T22:23:50.297-08:00smartgwtuiIn our project we are using Smart GWT component (DateChooser) which allows user to select dates ranges. It looks like this: . Smart GWT has a bunch of useful things (datasources, for example). But when I need some UI customization, sometimes I am having troubles :) And now I've got problems with height of the DateChooser component. Both date choosers have height 200 px, but the right one is http://jajatips.blogspot.com/2010/11/set-height-for-date-chooser-in-smartgwt.htmlnoreply@blogger.com (dimka)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/v6Qzplca45Y" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-1277855581619393274Fri, 24 Sep 2010 13:12:00 +00002010-09-27T07:41:57.769-07:00mockspringjunitaopHi all!In our project we have parts that are written by our outsource partners. We are using their services in our code. Services injected from spring to our beans.Yesterday, they made a weekly commit, and I've found out that my tests were broken :( One of their developer had commented my stub that implemented their interface. They said that he didn't want to change any code although I needed my http://jajatips.blogspot.com/2010/09/wrote-test-use-mockitodrink-mockito.htmlnoreply@blogger.com (dimka)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/5RALn8yUbpc" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-5030466064515740113Wed, 01 Sep 2010 19:00:00 +00002010-09-01T12:35:02.450-07:00multithreadingauthenticationalfrescoIn my application, I have a tree widget that using ajax for loading nodes. Tomcat create some threads to service requests. Each requests validate security ticket that stores in http session: authenticationService.validate(ticket, null); And some threads can not validate this ticket and service throws AuthenticationException. If you have particular problem, then you should look at alfresco's http://jajatips.blogspot.com/2010/09/authentication-problems-in.htmlnoreply@blogger.com (dimka)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/vnj17l0EK6M" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-695756198709432433Fri, 20 Aug 2010 09:22:00 +00002010-08-20T02:22:55.688-07:00alfrescoGood day! Yesterday, I had some fun with alfresco types and permissions. I've created simple type in my model that looks like this: <type name="my:simpleType"> <title>Simple type</title> <properties> <property name="my:prop"> <type>d:int</type> </property> </properties> </type> I've included it as child-association to the other type and tried to create it: Node simpleProp =http://jajatips.blogspot.com/2010/08/fun-with-alfresco-types.htmlnoreply@blogger.com (dimka)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/ICwjIMWivzA" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-2960365717029752096Wed, 04 Aug 2010 08:06:00 +00002010-08-04T02:02:10.531-07:00cmisdatealfrescoHi all! I have a new project that use Alfresco as a backend to store content. I need select content by date. User specifies dates and the service should find and display it. I've chosen CMIS API. It supports query language like SQL to get content. But I've got a problem. I need to specify the date in my query, that looks like this: SELECT * FROM my:content WHERE my:modifyDate < 01.01.2010 My http://jajatips.blogspot.com/2010/08/search-content-by-dates-using-cmis.htmlnoreply@blogger.com (dimka)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/NV1vChWNgQQ" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-4448055425422802588Tue, 19 Jan 2010 05:47:00 +00002010-02-05T00:02:39.585-08:00javaj2secollectionsGood morning :) Usually to update some entities in database I use service that must be calculate changes from new and old object and update changes in database(using DAO, for example). And the common task is update collections. I wrote simple class that calculate changes from old and new collections and create three collections: to delete, to update and to create. You can see class below and http://jajatips.blogspot.com/2010/01/getting-changes-from-collection.htmlnoreply@blogger.com (dimka)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/cE2g87GTUEE" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-3904499703897511389Thu, 19 Nov 2009 06:32:00 +00002009-11-18T22:32:36.606-08:00patternsj2eeexamplesGood Day. In the last message from SDN, I received information about "Java EE Patterns and Best Practices Project". That is excellent idea, with excellent realization. I recommend to all developers that use Java EE to see this examples. To get it, you should have mercurial and checkout repository, you can do it with following command: hg clone https://hg.kenai.com/hg/javaee-patterns~hg . To http://jajatips.blogspot.com/2009/11/good-examples-of-java-ee-patterns.htmlnoreply@blogger.com (dimka)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/Aofgm3lxkY8" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-107485631046104807Tue, 01 Sep 2009 04:45:00 +00002011-05-10T03:32:33.121-07:00javaj2selog4jUPD: One good man leave a good comment :) I think this is now supported in the standard; http://logging.apache.org/log4j/companions/extras/apidocs/org/apache/log4j/rolling/TimeBasedRollingPolicy.html Good day! On the last week, we gave our software to support specialists. They installed the program to production servers. And over three thousand users began to work with it. At the on of thathttp://jajatips.blogspot.com/2009/08/writing-compressing-file-appender-for.htmlnoreply@blogger.com (dimka)4<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/tbKDCFqsx2c" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-7495982114018818675Thu, 02 Jul 2009 04:56:00 +00002009-08-26T23:32:29.820-07:00springjdbcHi all!In this post, I would like to tell about the way to optimize INSERT operation to database. In our project we use postgresql 8.3. I have big problems with speed on some operations. When I profiled the application, I find out that the biggest amount of time spent for JDBC operations. We getting data from external systems, and often we have more than 300000 inserts to table. For work with http://jajatips.blogspot.com/2009/07/increase-perfomance-for-insert.htmlnoreply@blogger.com (dimka)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/-m9TErk0ZWQ" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-3904978901594057375Wed, 22 Apr 2009 04:03:00 +00002009-04-27T22:58:19.821-07:00j2seswingjava6awtYesterday, one of my tasks was to display hyperlink to local file. When user clicks hyperlink, program have to open file in an associated application. Earlier I have been writing desktop applications on QT and I haven't had any problems. But it is not very simple in Java(Swing). First, I've created label and put html as text:JLabel label = new JLabel("<html><a href=\"someurl.com\">link</a>");Whenhttp://jajatips.blogspot.com/2009/04/create-hyperlink-with-desktop.htmlnoreply@blogger.com (dimka)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/OnDjV_9klHU" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-5372149119435489405Sun, 19 Apr 2009 20:07:00 +00002009-04-20T00:24:35.654-07:00bloggerpublic class SimpleClass { public SimpleClass() { System.out.println("I'm a simple class!!!"); }}If you want the same highlighter in your blogger:1.Install widget from here: http://fazibear.googlepages.com/blogger.html2.Reading usage instruction(and do it:)) from here: http://code.google.com/p/syntaxhighlighter/wiki/UsageBig thanks to developers of syntaxhighlighter.http://jajatips.blogspot.com/2009/04/test-syntax-highlighter-for-blogger.htmlnoreply@blogger.com (dimka)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/ObbHcME2biw" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-7033598333187494880Sun, 12 Apr 2009 14:23:00 +00002009-04-12T20:53:36.209-07:00javaj2sesyntaxHi all! In this post I want to tell you about inner classes. Very often, we create static inner classes that contains information about main class. For example: public class Person { private String name; private String occupation; public static class PersonInfo { private String info; public PersonInfo(String name, String occupation) { info = “His name is ” + name + “ . He is http://jajatips.blogspot.com/2009/04/using-inner-classes_6395.htmlnoreply@blogger.com (dimka)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/48tZiyUdSqU" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-2122386378048134280Sun, 18 Jan 2009 15:05:00 +00002009-01-18T07:18:56.387-08:00jnlpjavadebugHi all!I want to remote debug in jnlp application. This problem solved is very simple. I set environment variable JAVAWS_VM_ARGS to value: -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5006After this, I create new run point in Intelli J IDEA. Type of run point is Remote debug. In run point set set host=localhost and port=5006(or other, ports in JAVAWS_VM_ARGS and run point musthttp://jajatips.blogspot.com/2009/01/debug-jnlp-application.htmlnoreply@blogger.com (dimka)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/O5ETq9RDu0E" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-3683572519546228242Sat, 13 Dec 2008 14:42:00 +00002008-12-16T01:03:03.762-08:00active directorywebspherej2eeldapwasWe need security over Active Directory in our enterprise application wich works on WebSphere Application Server v 6.1.x. When we test our application we use OpenDS(https://opends.dev.java.net/) to emulate Active Directory. But we must replace OpenDS with Active Directory. Every LDAP server has specific parameters. For fast test, I use ldapsearch from OpenDS. I spent more then two hours to get http://jajatips.blogspot.com/2008/12/global-security-in-was-61over-active.htmlnoreply@blogger.com (dimka)1<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/NpiOSb5fvbg" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-8453495860271159759Sat, 06 Dec 2008 06:55:00 +00002008-12-05T23:03:19.466-08:00svnHi all!For example, you have working copy that looks like this:foo/bar/And you know that someone added new folder, that called baz, in repository. You want get only this folder and you don't want to update all working copy. Solution is very simple:C:\project\>svn update bazThat's all, now you have new folder in your working copy.P.S. You can't do this, using popular frontend for svn - TortoiseSVN.http://jajatips.blogspot.com/2008/12/svn-update-only-new-folders-in-working.htmlnoreply@blogger.com (dimka)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/05Kc5-G4gWQ" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-98893948912522817Thu, 20 Nov 2008 11:35:00 +00002008-11-20T03:43:57.527-08:00placeholderspring Hello everyone! In the Spring Framework (I use Spring 2.5), we can use property placeholders in the spring xml-based configuration file. I wrote simple example that consist of four beans. Two of them are simple beans, one is a factory and one is a result bean that we want to get from factory bean. <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" http://jajatips.blogspot.com/2008/11/sring-placeholder-trick.htmlnoreply@blogger.com (dimka)2<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/8ElDUpvB_B0" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-6672718184223726605Thu, 06 Nov 2008 06:23:00 +00002009-09-10T23:39:27.161-07:00channelbytebufferj2seinputstreamnioLately I've faced a simple problem: I needed to read all bytes from the InputStream. I didn't know type of the InputStream, so, I've spent more then two hours solving this problem without any success. I didn't want to read each byte from the stream. All evening I could think only about this problem. Solution turned to be very simple! I found a sample in the JDK installation directory($JAVA_HOME/http://jajatips.blogspot.com/2008/11/reading-from-inputstream.htmlnoreply@blogger.com (dimka)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/w9IfH2n50RA" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-8633434480981224359Tue, 07 Oct 2008 04:48:00 +00002009-08-31T21:42:23.022-07:00reflectionjavaj2seProblem: test for equals two objects of the same class by all fields(deep equals). For solve this problem I use reflection API from JDK. Package that store classes for reflection is java.lang.reflect. I wrote simple helper class with static methods. You can find the complete realization at the and of the post. First of all we should describe algorithm: Input: two object that we need compare. http://jajatips.blogspot.com/2008/10/using-reflections-for-test-equals.htmlnoreply@blogger.com (dimka)0<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/xoicQ66Xv0U" height="1" width="1"/>tag:blogger.com,1999:blog-1604594366142210766.post-947118793233370379Sun, 28 Sep 2008 17:37:00 +00002009-09-04T23:49:57.579-07:00mysqltomcatjdbcWhen I try to solve this problem I read two docs: help in Netbeans 6(http://www.netbeans.org/kb/60/web/mysql-webapp.html#settingUpConnPool) and jndi help from tomcat.apache.org(http://tomcat.apache.org/tomcat-6.0-doc/jndi-datasource-examples-howto.html). But when I lookup InitialContext, application throws NamingException. I spent over four hours to solve this problem. As I've understood, when I http://jajatips.blogspot.com/2008/09/connect-to-mysql-5-with-tomcat-6.htmlnoreply@blogger.com (dimka)2<img src="http://feeds.feedburner.com/~r/JavalevelUp/~4/89B0Gv-SBNo" height="1" width="1"/>