ActiveBpel has a lot of directory and file configuration, which has also been very cleverly configured, we analyze as follows:
1) Catalina_home Configuring Some friends feel strange to Tomcat's Catalina_home configuration, in fact, see Tomcat's code we can
Understand; in ActiveBpel, how is it implemented? Let's see
Org.activebpel.rt.Tomcat.AeprocesSsengineServlet code knows .org.activebpel.rt.tomcat.AeprocesSsengineServlets to launch BPEL Server and AXIS services
User, as the Tomcat is released automatically, it is booted after startup, the thread can listen to business flows.
Cheng's release .org.activebpel.rt.Tomcat.AeprocesSsengineServlet has code as follows:
Public Static Final String Catalina_Home = System.getProperties
() .GetProperty ("catalina.home"); I think you already know what is going on.
2) ServletConfig Configuration We look at the web.xml file: Directory -> ("BPRDIRECTORY"); string engineconfigfilename = aconfig.getinitparameter ("aeengineconfigfile"); The above ACONFIG is declared in init (servletconfig aconfig, that is, ActiveBpel Use the directory and file configuration directly from Web.xml 3) getResourceAsStream using our method look at the code loadConfiguration: File file = new File (. AConfigFilename); ClassLoader cl = Thread.currentThread () getContextClassLoader (); if (file.exists ()) {// load the configuration xml IN = new fileinputstream (file);} else {log.info ("File" AconfigFileName "Doesn't exist loading from default classpath " DEFAULT_BPEL_ENGINE_CONFIG); // load the default configuration file if not in bpr directory in = cl.getResourceAsStream (DEFAULT_BPEL_ENGINE_CONFIG);} If you are familiar with ClassLoader, should not be difficult to understand if the above code / bpr / below. There is a configuration file, then read from this directory; otherwise, the file can be packaged in the package, then read the configuration file from the package. How, good?
