3) and 4) are answered here http://stackoverflow.com/questions/1350816/what-is-the-purpose-of-jndi http://stackoverflow.com/questions/5143499/understanding-jndi http://www.javaworld.com/javaworld/jw-04-2002/jw-0419-jndi.html http://technotes.tostaky.biz/2013/01/what-is-jndi-spi-cci-ldap-and-jca.html
other question, especially concerning tomcat are still valid On Mon, Apr 29, 2013 at 9:21 AM, Jakub 1983 <jjaku...@gmail.com> wrote: > I have read > > http://tomcat.apache.org/tomcat-7.0-doc/jndi-datasource-examples-howto.html > http://tomcat.apache.org/tomcat-7.0-doc/jndi-resources-howto.html > > 1)I would like to ask about essence of jndi > a) jndi as a whole and > b) jndi in tomcat > > In all known to me cases jndi in tomcat and in jboss is used only as > > http://docs.oracle.com/javase/1.5.0/docs/api/javax/naming/InitialContext.html#lookup%28java.lang.String%29 > > 2) are there any other common uses ? > > 3) Can we say JNDI in tomcat is a static Map for each application ? > actually a map, that can hold > simple values and objects(int, string), > object factories on which Map.get doesn't return them, but returns objects > created by this factories, > object pools - similar to factories > and this static Map can be configured with xml in web.xml and in > context.xml. > > 4) Is this a good comparison ? > InitialContext.lookup is not more than Map.get, apart from case of > factories. > 5) Or INDI in tomcat has much more functionality ? > > 6) Is comparison to spring container with scope singleton and prototype > more adequate ? > 7) Can we say it is older implementation of spring bean container ? > > 8)Where is the difference between > a) Map and jndi > b) spring container and jndi > > 9) can jndi be configured outside of tomcat ? in some other process ? > > 10) I mostly take part in small projects, where team leader/architect also > deploys app in production, possibly jndi is much more handful in corporate > environment, where war is shipped to admin dedicated tomcat administrator, > who deploys it and configures jdbc connections, and he can't simply change > spring configuration. > > 11) jndi in contrary to spring is a standard and each tomcat/app server > admin knows it and knows where and how to configure it ? > > 12) in projects without dedicated tomcat administrator where team leader > makes build and deploys it into production jndi is an excess, and it is > better and more handful to use spring and maven profiles for dev and > production environment ? > > 12b) in projects as in 12) there is no sense speaking about advantages of > jndi, jndi can be skipped and spring can be used instead. > > 13) looking into > http://docs.oracle.com/javase/1.5.0/docs/guide/jndi/jndi-dns.html > would be possible in tomcat to map dns as a jndi provider ? > would it work than that > InitialContext.lookup("some_appropriate_dns_prefix" + "tomcat.apache.org") > would return me ip address ?? > > 14) similar to 13) > http://docs.oracle.com/javase/6/docs/technotes/guides/jndi/jndi-ldap.html > would it be possible in tomcat to map some external ldap as a jndi > provider ? > would ctx.lookup("some_appropriate_ldap_prefix" + > "cn=objects,ou=Sales/some/x/y/z"); query ldap ? > > 15) would 13) and 14) work in tomcat, if not would it work in eg jboss ? > if so what are common "some_appropriate_dns_prefix" and > "some_appropriate_ldap_prefix" ? > > 16) can we add both 13) dns and 14) ldap into tomcat as jndi providers, > and both work in the same webapp with appropriate prefixes, and > "java:comp/env/" still returns Resources from web.xml and from context.xml ? > > thx for reply in advance, regards > Jakub >
