http://itech9.com/wp Notes, resources, information about software development, info security, other tech. Thu, 26 Aug 2010 16:31:26 +0000 http://backend.userland.com/rss092 en From http://www.scottklarr.com/topic/134/linux-how-to-clear-the-cache-from-memory/ $ sync; echo 3 > /proc/sys/vm/drop_caches Wait for caches to be flushed.. $ sync; echo 0 > /proc/sys/vm/drop_caches http://itech9.com/wp/?p=141 From http://www.perlmonks.org/?node_id=63955 How many 'a' characters are in the string? #!/usr/bin/perl my $str = 'abcatpdmeuziapmb'; my $cnt = @{[$str =~ /(a)/g]}; print "$cnt\n"; http://itech9.com/wp/?p=140 From http://download.oracle.com/docs/cd/E12840_01/wls/docs103/client/jarbuilder.html Use the following steps to create a wlfullclient.jar file for a JDK 1.6 client application: 1.Change directories to the server/lib directory. cd WL_HOME/server/lib 2. Use the following command to create wlfullclient.jar in the server/lib directory: java -jar wljarbuilder.jar 3.You can now copy and bundle the wlfullclient.jar with client applications. 4.Add the wlfullclient.jar to ... http://itech9.com/wp/?p=139 From http://www.tech-recipes.com/rx/1419/list-files-in-an-rpm-package/ To list the contents of the RPM techrx.rpm use this command: rpm -qlp techrx.rpm http://itech9.com/wp/?p=138 From http://databases.about.com/od/specificproducts/a/acid.htm Atomicity states that database modifications must follow an 'all or nothing' rule. Consistency states that only valid data will be written to the database. Isolation requires that multiple transactions occurring at the same time not impact each other's execution. Durability ensures that any transaction committed to the database will not be lost. http://itech9.com/wp/?p=137 >> WebLogic 10.3 is old but I want to follow the workshop and I cannot find the "workshop" in the Oracle WebLogic 10.3.3 package.   * For page navigation, it uses Apache Beehive, which is now retired. >> Add Eclipse components via:   * /opt/bea/wlserver_10.3/common/bin/config.sh &   * Fix eclipse java crash: add this line to "workshop.ini":   -Dorg.eclipse.swt.browser.XULRunnerPath=/usr/lib/xulrunner-1.9/xulrunner   * Create ... http://itech9.com/wp/?p=136 In WebLogic 10.3 .. weblogic-ejb-jar.xml with this entity-descriptor: <entity-descriptor> <persistence> <persistence-use> <type-identifier>WebLogic-CMP</type-identifier> <type-version>6.0</type-version> ... </persistence-use> </persistence> </entity-descriptor> Triggers this error (Note the -truly- useful help message): Unable to deploy EJB: /opt/bea/user_projects/domains/base_domain/servers/AdminServer/stage /_appsdir_ProductEjb_jar/ProductEjb.jar from ProductEjb.jar: Persistence type 'WebLogic-CMP' with version '6.0' which is referenced in bean 'Product' is not installed. The installed persistence types are:(WebLogic_CMP_RDBMS, 5.1.0), (WebLogic_CMP_RDBMS, 7.0), (WebLogic_CMP_RDBMS, ... http://itech9.com/wp/?p=135 From http://www.cert.org/ cross-site scripting (XSS) vulnerabilities Cross-site request forgery (CSRF) denial of service (resource consumption) Directory traversal Integer overflow Integer signedness Session fixation (hijack web sessions) PHP remote file inclusion SQL injection http://itech9.com/wp/?p=134 In JBoss, one can get a reference to the Remote bean directly: try { context = new InitialContext(jndiprops); BookTestBeanRemote beanRemote = (BookTestBeanRemote) context.lookup("BookTestBean/remote"); beanRemote.test(); } catch (NamingException e) { ... } In WebLogic 10.3, ... http://itech9.com/wp/?p=133 In JBoss, this works: List someBooks = em.createQuery("FROM Book b WHERE b.author=:name") .setParameter("name", "Sebastian").getResultList(); In WebLogic, I had to specify SELECTs: List someBooks = em.createQuery("SELECT b FROM Book b WHERE b.author=:name") .setParameter("name", "Sebastian").getResultList(); If I have time, I will dig further and see why they behave differently but ... http://itech9.com/wp/?p=132