1 package org.ibex.jinetd;
3 import org.ibex.util.*;
8 import java.util.zip.*;
10 /** represents a file or directory which is scanned for updates */
11 public class Loader extends Watcher {
13 ClassLoader parentClassLoader = null;
14 static final ClassLoader mycl = Loader.class.getClassLoader();
16 protected ThreadGroup tg = new ThreadGroup(getAbsolutePath());
18 public Loader(String path) { super(path); }
19 //public Loader(String path, ClassLoader pcl) { super(path); this.parentClassLoader = pcl; }
21 private TreeClassLoader classloader = null;
22 public synchronized void scan() throws IOException { super.scan(); }
23 public synchronized ClassLoader getClassLoader() {
24 ClassLoader classloader = this.classloader;
25 if (classloader == null) {
26 String s = getClassPath();
27 StringTokenizer st = new StringTokenizer(s, File.pathSeparatorChar+"");
28 URL[] urls = new URL[st.countTokens()];
30 for(int i=0; i<urls.length; i++) {
31 String us = st.nextToken();
32 //if (us.endsWith(".jar")) us = "jar:file:"+us+"!/";
33 if (us.endsWith(".jar")) us = "file:"+us;
34 else us = "file:"+us+"/";
35 urls[i] = new URL(us);
37 } catch (MalformedURLException e) {
41 classloader = this.classloader = new TreeClassLoader(urls/*, parentClassLoader*/);
42 try { compileSource(); } catch (Exception e) { Log.error(this, e); }
47 private void fill(Vec vec, File dir) {
48 if (!dir.exists()) return;
49 if (!dir.isDirectory()) {
50 if (!dir.getPath().endsWith(".java")) return;
51 vec.addElement(dir.getAbsolutePath());
53 String[] list = dir.list();
54 for(int i=0; i<list.length; i++)
55 fill(vec, new File(dir.getAbsolutePath() + File.separatorChar + list[i]));
60 public String getClassPath() {
61 String classpath = System.getProperty("java.class.path");
62 String [] l = new File(Root.root + "/LIB/").list();
63 for(int i=0; l != null && i<l.length; i++) {
64 if (!l[i].endsWith(".jar")) continue;
65 classpath += File.pathSeparatorChar;
66 classpath += Root.root + "/LIB/" + l[i];
68 l = new File(this.path + File.separatorChar + "LIB").list();
69 for(int i=0; l!=null && i<l.length; i++) {
70 if (!l[i].endsWith(".jar")) continue;
71 classpath += File.pathSeparatorChar;
72 classpath += this.path + "/LIB/" + l[i];
74 return classpath + File.pathSeparatorChar + this.path + "/BIN";
77 private void compileSource() throws Exception {
78 File srcdir = new File(this.path + File.separatorChar + "SRC");
79 if (!srcdir.exists()) return;
81 if (new File("/usr/bin/jikes").exists()) {
82 File bindir = new File(this.path + File.separatorChar + "BIN"); bindir.mkdirs();
83 String bootclasspath = System.getProperty("sun.boot.class.path", "");
85 args.addElement("/usr/bin/jikes");
86 args.addElement("+E");
87 args.addElement("-nowarn");
88 args.addElement("-bootclasspath");
89 args.addElement(bootclasspath);
90 args.addElement("-classpath");
91 args.addElement(getClassPath());
92 args.addElement("-sourcepath");
93 args.addElement(srcdir.getAbsolutePath());
94 args.addElement("-d");
95 args.addElement(bindir.getAbsolutePath());
97 String[] all = new String[args.size()];
99 Log.info(this, "invoking jikes");
100 for(int i=0; i<all.length; i++) Log.info(this, " " + all[i]);
101 final Process jikes = Runtime.getRuntime().exec(all);
102 final BufferedReader out = new BufferedReader(new InputStreamReader(jikes.getInputStream()));
103 final BufferedReader err = new BufferedReader(new InputStreamReader(jikes.getErrorStream()));
104 new Thread() { public void run() {
105 try { for(String s = out.readLine(); s != null; s = out.readLine()) Log.info("jikes[stdout]", s); }
106 catch (Exception e) { Log.warn("jikes", e); } } }.start();
107 new Thread() { public void run() {
108 try { for(String s = err.readLine(); s != null; s = err.readLine()) Log.info("jikes[stderr]", s); }
109 catch (Exception e) { Log.warn("jikes", e); } } }.start();
112 Log.error(this, "ACK! jikes not found, javac not (yet) supported");
116 File bindir = new File(this.path + File.separatorChar + "BIN"); bindir.mkdirs();
117 Vec args = new Vec();
118 args.addElement("/usr/bin/javac");
119 args.addElement("-nowarn");
120 args.addElement("-classpath");
121 args.addElement(getClassPath());
122 args.addElement("-sourcepath");
123 args.addElement(srcdir.getAbsolutePath());
124 args.addElement("-d");
125 args.addElement(bindir.getAbsolutePath());
127 String[] all = new String[args.size()];
129 Log.info(this, "invoking javac for " + srcdir.getAbsolutePath());
130 final Process javac = Runtime.getRuntime().exec(all, new String[] { "PATH=/bin:/usr/bin" });
131 final BufferedReader out = new BufferedReader(new InputStreamReader(javac.getInputStream()));
132 final BufferedReader err = new BufferedReader(new InputStreamReader(javac.getErrorStream()));
133 new Thread() { public void run() {
134 try { for(String s = out.readLine(); s != null; s = out.readLine()) Log.info("javac [stdout]", s); }
135 catch (Exception e) { Log.warn("javac", e); } } }.start();
136 new Thread() { public void run() {
137 try { for(String s = err.readLine(); s != null; s = err.readLine()) Log.info("javac [stderr]", s); }
138 catch (Exception e) { Log.warn("javac", e); } } }.start();
143 // only watch SRC and LIB for changes
144 public Watched slash(String path) {
145 return (path.equals("LIB") ||
146 path.equals("BIN") ||
147 path.equals("SRC") ||
148 path.endsWith(".jar") ) ? super.slash(path) : null; }
151 private void nuke() {
152 if (tg.activeCount() == 0) return;
153 Log.info(this, "killing all threads for: " + path);
154 Log.info(this, " thread count before interrupt: " + tg.activeCount());
156 try { Thread.sleep(3000); } catch (Exception e) { Log.error(this, e); }
157 Log.info(this, " thread count before kill: " + tg.activeCount());
158 Thread[] all = new Thread[tg.activeCount()];
159 tg.enumerate(all, true);
160 for(int i=0; i<all.length; i++) Stream.kill(all[i]);
161 try { Thread.sleep(3000); } catch (Exception e) { Log.error(this, e); }
162 Log.info(this, " thread count after kill: " + tg.activeCount());
163 if (tg.activeCount() > 0) {
164 Log.warn(this, " annoying threads:");
165 Thread[] annoying = new Thread[tg.activeCount()];
166 tg.enumerate(annoying, true);
167 for(int i=0; i<annoying.length; i++) {
168 Log.warn(this, " " + annoying[i]);
169 StackTraceElement[] stack = annoying[i].getStackTrace();
170 for(int j=0; j<stack.length; j++) Log.warn(this, " " + stack[j]);
176 // dump the classloader if anything changes
177 public void changed(Watched w) {
178 if (w.path.indexOf("BIN") != -1) return;
179 if (classloader != null) {
180 for(int i=0; i<3; i++) nuke();
181 tg = new ThreadGroup(getAbsolutePath());
182 Log.info(this, "scheduling classes for reload due to change in: " + w.path);
187 public class TreeClassLoader extends java.net.URLClassLoader {
189 public String getClassPath() { return Loader.this.getClassPath(); }
191 public TreeClassLoader(java.net.URL[] urls) { super(urls); }
192 //private Hashtable cache = new Hashtable();
194 public InputStream getResourceAsStream(String name) { return getInputStream(name); }
196 private synchronized Class defineClass(String name) {
198 InputStream is = null;
201 is = getInputStream(name.replace('.', File.separatorChar) + ".class");
202 if (is == null) return null;
203 b = InputStreamToByteArray.convert(is);
204 } finally { if (is != null) is.close(); }
205 return defineClass(b, 0, b.length);
206 } catch (Exception e) {
212 private InputStream getInputStream(String name) {
213 // first see if it's just sitting there
214 File classFile = slash("BIN").slash(name);
215 if (classFile.exists()) try {
216 return new FileInputStream(classFile);
217 } catch (Exception e) { Log.warn(this, e); }
219 // then scan the jarfiles for it
220 File lib = slash("LIB");
221 if (lib.exists() && lib.isDirectory()) try {
222 boolean first = true;
224 String[] paths = first ? lib.list() : list();
225 for(int i=0; i<paths.length; i++) {
226 if (paths[i].endsWith(".jar")) {
227 File f = new File(getAbsolutePath()+File.separatorChar+"LIB"+File.separatorChar+paths[i]);
228 Log.debug(this, " scanning " + f.getAbsolutePath() + " for " + name);
229 ZipFile zf = new ZipFile(f);
230 ZipEntry ze = zf.getEntry(name);
231 if (ze != null) return zf.getInputStream(ze);
238 } catch (Exception e) { Log.warn(this, e); }
240 // finally, resort to compiling it if we have to
241 //File src = new File(getAbsolutePath() + File.separatorChar + "SRC");
243 //if (!sourcebuilt) buildSource();
247 public synchronized Class loadClass(String name, boolean resolve) throws ClassNotFoundException {
248 Class c = (Class)cache.get(name);
249 if (c == null) try { c = findSystemClass(name); } catch (ClassNotFoundException cfe) { }
250 if (c == null) try { c = Class.forName(name); } catch (ClassNotFoundException cfe) { }
251 if (c == null) c = defineClass(name);
252 if (c == null) throw new ClassNotFoundException();
254 if (resolve) resolveClass(c);