Github user ctubbsii commented on a diff in the pull request:
https://github.com/apache/accumulo/pull/231#discussion_r105064808
--- Diff:
start/src/main/java/org/apache/accumulo/start/classloader/vfs/AccumuloVFSClassLoader.java
---
@@ -171,8 +167,27 @@ public void run() {
return classpath.toArray(new FileObject[classpath.size()]);
}
+ protected static String addToClasspath(String classpath, String
addition) {
+ boolean cpExists = classpath != null && !classpath.isEmpty();
+ boolean adExists = addition != null && !addition.isEmpty();
+ if (cpExists && adExists) {
+ return classpath + "," + addition;
+ } else if (cpExists) {
+ return classpath;
+ } else if (adExists) {
+ return addition;
+ }
+ return "";
+ }
+
private static ReloadingClassLoader createDynamicClassloader(final
ClassLoader parent) throws FileSystemException, IOException {
- String dynamicCPath =
AccumuloClassLoader.getAccumuloString(DYNAMIC_CLASSPATH_PROPERTY_NAME,
DEFAULT_DYNAMIC_CLASSPATH_VALUE);
+ String dynamicClasspathJvm =
System.getProperty(DYNAMIC_CLASSPATHS_JVM_PROPERTY, "");
+ String dynamicClasspathSite =
AccumuloClassLoader.getAccumuloString(DYNAMIC_CLASSPATHS_SITE_PROPERTY, "");
+ String dynamicCPath = addToClasspath("", dynamicClasspathJvm);
+ dynamicCPath = addToClasspath(dynamicCPath, dynamicClasspathSite);
+ log.info("JVM property {} = {}", DYNAMIC_CLASSPATHS_JVM_PROPERTY,
dynamicClasspathJvm);
+ log.info("Config property {} = {}", DYNAMIC_CLASSPATHS_SITE_PROPERTY,
dynamicClasspathSite);
+ log.info("Derived dynamic classpath = {}", dynamicCPath);
--- End diff --
This is a lot of added behavioral complexity. Part of the reason I thought
we were trying to move away from reliance on environment values, is because of
the behavioral complexity we had to incorporate in code in order to handle
those environmental settings. Switching from an environment variable to a
system property doesn't really achieve this goal, if we're including a bunch of
new code to handle the special circumstances of that property.
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