-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Mark,
On 12/18/14 9:38 AM, Mark Thomas wrote: > On 18/12/2014 14:18, Christopher Schultz wrote: > >> Mark, can you clarify what behavior will actually change when >> scanAllDirectories="true" is set? > > A JAR file is scanned for SCIs, static resources etc. A directory > of classes is not. Setting scanAllDirectories causes directories of > classes (including WEB-INF/classes) to be treated as expanded JAR > files. It is normally only used when integrating with an IDE. Interesting. I was about to say: "Does that mean that, under a default configuration, having an SCI in your WEB-INF/classes will not be found and called? That would be surprising to me if I were trying to use SCIs directly in my application (as opposed to using them indirectly, through a library, as usually happens)." ...until I read the documentation for SCI which says this at the end: " Implementations of this interface must be declared by a JAR file resource located inside the META-INF/services directory and named for the fully qualified class name of this interface, and will be discovered using the runtime's service provider lookup mechanism or a container specific mechanism that is semantically equivalent to it. In either case, ServletContainerInitializer services from web fragment JAR files excluded from an absolute ordering must be ignored, and the order in which these services are discovered must follow the application's classloading delegation model. " I've never (directly) used SCIs or META-INF/services or static resources of anything like that so I didn't know about them having to be packaged in a certain way. So, under normal circumstances, only CATALINA_HOME/lib, CATALINA_BASE/lib, and WEB-INF/classes would fail to have SCIs and static resources scanned/loaded from them directly, and enabling this feature would allow you to put e.g. META-INF/services into CATALINA_BASE/lib and then configure services there. So the only real use case for this is when you are customizing the webapp's classpath in some way (which IDEs do) or if you want to write your own SCI or use static resources without packaging them into JARs and putting them in WEB-INF/lib. I can see that being a valid use case, but probably one that is very rare. Thanks for the clarification, - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: GPGTools - http://gpgtools.org iQIcBAEBCAAGBQJUkxY9AAoJEBzwKT+lPKRYnlgP/jXCtr3HhRYy5W0vLwX04NIt Ht8tai57j11UFsQqDnb9mppJ75L8JPVMgm7jAKZOQtfo5gIZhLl9VXlbCMFuZxTh RizJoAejYGmWY2qxXtQ7x8q+8gHMPldjpjtgSc4ORRJ0ME3O1PZIDggBxFp+S7Cy N7RNDoWZ9PX02kkJzojTzb9dy/NvXScYi/KnJ9w2dOtJFFzlqlgn0f9sUJP00mSm I/j37bhIYowiFzhh3CYNEAVwTUaXJhiRyGue7ABmjguCu28Ys1HwvSKQcE3e0Skd eOgmQbafqWZO1bkhlSiAvGDs+HEd1zctnxwOsg1+uLW1c/FyKXMD3ptI+kPg0fh4 SRU29U/22v85SH+fqUQ27Oltkk/WR2645FJwz1usaO2JZsz3S18KBpq9+2XxEPWq TS7k0dPruC2SJF+eaWwCuq1q0NfJVk1Ri2ighTmeABBKJCJgy9hJZUup/u8VRZJR vQpM9Sz7pWwBvBNliC88q7iJqqPvWZPWvmz+u7XA8AAs7DuKkaRLIdQo12imsHy8 9QlpFyEfNeomEAKvOEeJelkUcaBkiXyBHT08zRrejhClRjSbqGVeiTQu4aWBBtob xbersVEiY7FstpvLGgLMOW2zJhCrCyfYTYsJ0XZ/BVuQkHtZ+ZG+u2h5nIFGLTcw h9o4aSxyB9NA8pJ8CL2I =HzPs -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
