From 36537ce85a05d6891e7c7b165cb9c800d9ecccd0 Mon Sep 17 00:00:00 2001
From: Fredrik Tolf <fredrik@dolda2000.com>
Date: Thu, 15 Oct 2009 07:26:54 +0200
Subject: [PATCH] Started a basic storage manager.

---
 src/dolda/jsvc/store/Store.java | 85 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 src/dolda/jsvc/store/Store.java

diff --git a/src/dolda/jsvc/store/Store.java b/src/dolda/jsvc/store/Store.java
new file mode 100644
index 0000000..8e050a3
--- /dev/null
+++ b/src/dolda/jsvc/store/Store.java
@@ -0,0 +1,85 @@
+package dolda.jsvc.store;
+
+import dolda.jsvc.*;
+import dolda.jsvc.util.Misc;
+import java.io.*;
+import java.security.*;
+import java.security.cert.Certificate;
+import java.util.*;
+
+public class Store {
+    private static Map<Package, Store> interned = new WeakHashMap<Package, Store>();
+    private final Package pkg;
+    private final File base;
+    
+    private Store(Package pkg, CodeSource src, File root) {
+	this.pkg = pkg;
+	String nm = pkg.getName();
+	File base = root;
+	if(src != null) {
+	    try {
+		MessageDigest fdig = MessageDigest.getInstance("MD5");
+		for(Certificate cert : src.getCertificates()) {
+		    MessageDigest cdig = MessageDigest.getInstance("MD5");
+		    cdig.update(cert.getEncoded());
+		    fdig.update(cdig.digest());
+		}
+		byte[] fp = fdig.digest();
+		StringBuilder buf = new StringBuilder();
+		for(byte b : fp) {
+		    buf.append(Misc.int2hex((b & 0xf0) >> 4, true));
+		    buf.append(Misc.int2hex(b & 0x0f, true));
+		}
+		base = new File(base, buf.toString());
+	    } catch(NoSuchAlgorithmException e) {
+		throw(new Error(e));
+	    } catch(java.security.cert.CertificateEncodingException e) {
+		throw(new Error(e));
+	    }
+	}
+	int p = 0;
+	int p2;
+	while((p2 = nm.indexOf('.', p)) >= 0) {
+	    base = new File(base, nm.substring(p, p2));
+	    p = p2 + 1;
+	}
+	this.base = new File(base, nm.substring(p));
+    }
+    
+    private static File getstoreroot() {
+	ThreadContext ctx = ThreadContext.current();
+	if(ctx == null)
+	    throw(new RuntimeException("Not running in jsvc context"));
+	String bn = ctx.server().config("jsvc.storage");
+	if(bn == null)
+	    throw(new RuntimeException("No storage root has been configured"));
+	return(new File(bn));
+    }
+
+    public static Store forclass(final Class<?> cl) {
+	Package pkg = cl.getPackage();
+	File root = getstoreroot();
+	Store s;
+	synchronized(interned) {
+	    s = interned.get(pkg);
+	    if(s == null) {
+		ProtectionDomain dom;
+		dom = AccessController.doPrivileged(new PrivilegedAction<ProtectionDomain>() {
+			public ProtectionDomain run() {
+			    try {
+				return(cl.getProtectionDomain());
+			    } catch(SecurityException e) {
+				return(null);
+			    }
+			}
+		    });
+		if(dom != null)
+		    s = new Store(pkg, dom.getCodeSource(), root);
+		else
+		    s = new Store(pkg, null, root);
+		interned.put(pkg, s);
+	    }
+	}
+	return(s);
+    }
+}
-- 
2.11.0