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classpath for plugins

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This commit is contained in:
zzz
2010-02-07 17:13:44 +00:00
parent 58adccfd4a
commit e9f1da85e4
2 changed files with 64 additions and 5 deletions
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56
apps/routerconsole/java/src/net/i2p/router/web/PluginStarter.java
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@ -2,6 +2,9 @@ package net.i2p.router.web;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
@ -39,6 +42,7 @@ public class PluginStarter implements Runnable {
}
static void startPlugins(RouterContext ctx) {
Log log = ctx.logManager().getLog(PluginStarter.class);
Properties props = pluginProperties();
for (Iterator iter = props.keySet().iterator(); iter.hasNext(); ) {
String name = (String)iter.next();
@ -47,9 +51,9 @@ public class PluginStarter implements Runnable {
String app = name.substring(PluginStarter.PREFIX.length(), name.lastIndexOf(PluginStarter.ENABLED));
try {
if (!startPlugin(ctx, app))
System.err.println("Failed to start plugin: " + app);
log.error("Failed to start plugin: " + app);
} catch (Exception e) {
System.err.println("Failed to start plugin: " + app + ' ' + e);
log.error("Failed to start plugin: " + app, e);
}
}
}
@ -58,9 +62,10 @@ public class PluginStarter implements Runnable {
/** @return true on success */
static boolean startPlugin(RouterContext ctx, String appName) throws Exception {
Log log = ctx.logManager().getLog(PluginStarter.class);
File pluginDir = new File(ctx.getAppDir(), PluginUpdateHandler.PLUGIN_DIR + '/' + appName);
if ((!pluginDir.exists()) || (!pluginDir.isDirectory())) {
System.err.println("Cannot start nonexistent plugin: " + appName);
log.error("Cannot start nonexistent plugin: " + appName);
return false;
}
@ -91,7 +96,7 @@ public class PluginStarter implements Runnable {
WebAppStarter.startWebApp(ctx, server, warName, path);
}
} catch (IOException ioe) {
System.err.println("Error resolving '" + fileNames[i] + "' in '" + webappDir);
log.error("Error resolving '" + fileNames[i] + "' in '" + webappDir, ioe);
}
}
}
@ -157,6 +162,15 @@ public class PluginStarter implements Runnable {
argVal[i] = argVal[i].replace("$PLUGIN", pluginDir.getAbsolutePath());
}
}
if (app.classpath != null) {
String cp = new String(app.classpath);
if (cp.indexOf("$") >= 0) {
cp = cp.replace("$I2P", ctx.getBaseDir().getAbsolutePath());
cp = cp.replace("$CONFIG", ctx.getConfigDir().getAbsolutePath());
cp = cp.replace("$PLUGIN", pluginDir.getAbsolutePath());
}
addToClasspath(cp, app.clientName, log);
}
if (app.delay == 0) {
// run this guy now
LoadClientAppsJob.runClient(app.className, app.clientName, argVal, log);
@ -166,4 +180,38 @@ public class PluginStarter implements Runnable {
}
}
}
/**
* Perhaps there's an easy way to use Thread.setContextClassLoader()
* but I don't see how to make it magically get used for everything.
* So add this to the whole JVM's classpath.
*/
private static void addToClasspath(String classpath, String clientName, Log log) {
StringTokenizer tok = new StringTokenizer(classpath, ",");
while (tok.hasMoreTokens()) {
String elem = tok.nextToken().trim();
File f = new File(elem);
if (!f.isAbsolute()) {
log.error("Plugin client " + clientName + " classpath element is not absolute: " + f);
continue;
}
try {
log.error("INFO: Adding plugin classpath: " + f);
addPath(f.toURI().toURL());
} catch (Exception e) {
log.error("Plugin client " + clientName + " bad classpath element: " + f, e);
}
}
}
/**
* http://jimlife.wordpress.com/2007/12/19/java-adding-new-classpath-at-runtime/
*/
public static void addPath(URL u) throws Exception {
URLClassLoader urlClassLoader = (URLClassLoader) ClassLoader.getSystemClassLoader();
Class urlClass = URLClassLoader.class;
Method method = urlClass.getDeclaredMethod("addURL", new Class[]{URL.class});
method.setAccessible(true);
method.invoke(urlClassLoader, new Object[]{u});
}
}