upgrade to jnotify 0.94 (patched) for 64-bit support, and improve error reporting in tests

- add a UnixRemovableDriveMonitor.checkEnabled to pre-emptively check if it's loaded
- os.arch is always x86,x86_64 on windows, i386,amd64 on linux
- source: http://www.java-gaming.org/index.php/topic,14110
- we'll deal with freebsd support when we come to it, jnotify doesn't even do this atm

briar-desktop/src/org/briarproject/plugins/file/UnixRemovableDriveMonitor.java

@@ -19,7 +19,27 @@ JNotifyListener {
 
 	protected abstract String[] getPathsToWatch();
 
+	final private static Throwable loadError = tryLoad();
+
+	private static Throwable tryLoad() {
+		try {
+			Class.forName("net.contentobjects.jnotify.JNotify");
+			return null;
+		} catch (UnsatisfiedLinkError e) {
+			return e;
+		} catch (ClassNotFoundException e) {
+			return e;
+		}
+	}
+
+	public static void checkEnabled() throws IOException {
+		if (loadError != null) {
+			throw new IOException("JNotify not loaded", loadError);
+		}
+	}
+
 	public void start(Callback callback) throws IOException {
+		checkEnabled();
 		List<Integer> watches = new ArrayList<Integer>();
 		int mask = JNotify.FILE_CREATED;
 		for(String path : getPathsToWatch()) {
@@ -36,6 +56,7 @@ JNotifyListener {
 	}
 
 	public void stop() throws IOException {
+		checkEnabled();
 		List<Integer> watches;
 		synchronized(this) {
 			assert started;

briar-tests/build.xml

@@ -76,10 +76,11 @@
 		</javac>
 	</target>
 	<target name='test' depends='compile'>
-		<junit printsummary='on' fork='yes' forkmode='once'>
+		<junit printsummary='on' fork='yes' forkmode='once' haltonfailure='yes' showoutput='true'>
 			<assertions>
 				<enable/>
 			</assertions>
+			<formatter type="plain" usefile="false"/>
 			<classpath>
 				<fileset refid='test-jars'/>
 				<fileset refid='desktop-jars'/>
@@ -90,7 +91,7 @@
 				<path refid='core-classes'/>
 				<path refid='api-classes'/>
 			</classpath>
-			<jvmarg value='-Djava.library.path=../briar-desktop/libs'/>
+			<sysproperty key='java.library.path' value='../briar-desktop/libs'/>
 			<test name='org.briarproject.LockFairnessTest'/>
 			<test name='org.briarproject.ProtocolIntegrationTest'/>
 			<test name='org.briarproject.crypto.FortunaGeneratorTest'/>
@@ -153,7 +154,7 @@
 				<path refid='core-classes'/>
 				<path refid='api-classes'/>
 			</classpath>
-			<jvmarg value='-Djava.library.path=../briar-desktop/libs'/>
+			<sysproperty key='java.library.path' value='../briar-desktop/libs'/>
 			<test name='org.briarproject.db.H2DatabaseTest'/>
 		</junit>
 	</target>

briar-tests/src/org/briarproject/plugins/file/UnixRemovableDriveMonitorTest.java

@@ -82,7 +82,8 @@ public class UnixRemovableDriveMonitorTest extends BriarTestCase {
 		TestUtils.deleteTestDirectory(testDir);
 	}
 
-	private RemovableDriveMonitor createMonitor(final File dir) {
+	private RemovableDriveMonitor createMonitor(final File dir) throws IOException {
+		UnixRemovableDriveMonitor.checkEnabled();
 		return new UnixRemovableDriveMonitor() {
 			@Override
 			protected String[] getPathsToWatch() {

jnotify-0.94.patch

@@ -0,0 +1,113 @@
+briar-desktop/libs/jnotify-0.94.jar is built via: 
+$ wget "http://downloads.sourceforge.net/project/jnotify/jnotify/jnotify-0.94/jnotify-lib-0.94.zip?r=&ts=$(date +%s)"
+$ unzip -d jnotify-lib-0.94 jnotify-lib-0.94.zip && cd jnotify-lib-0.94
+$ unzip -d src jnotify-0.94-src.zip
+$ wget -O build.xml "http://jnotify.cvs.sourceforge.net/viewvc/jnotify/jnotify/build.xml?revision=1.7&pathrev=HEAD"
+$ wget -O build.properties "http://jnotify.cvs.sourceforge.net/viewvc/jnotify/jnotify/build.properties?revision=1.13"
+$ patch -lp1 < /path/to/this/patch
+$ ant build_java # if this fails with invalid flag: -g:{lines,vars,source}, try removing the debug attributes from <javac>
+
+diff -ru jnotify-0.94/net/contentobjects/jnotify/linux/JNotify_linux.java jnotify-0.94-briar/net/contentobjects/jnotify/linux/JNotify_linux.java
+--- jnotify-0.94/net/contentobjects/jnotify/linux/JNotify_linux.java	2012-04-25 00:03:54.000000000 +0100
++++ jnotify-0.94-briar/net/contentobjects/jnotify/linux/JNotify_linux.java	2014-01-30 12:31:41.959082350 +0000
+@@ -37,6 +37,7 @@
+ package net.contentobjects.jnotify.linux;
+ 
+ import net.contentobjects.jnotify.JNotifyException;
++import net.contentobjects.jnotify.Util;
+ 
+ public class JNotify_linux
+ {
+@@ -45,7 +46,7 @@
+ 	
+ 	static
+ 	{
+-		System.loadLibrary("jnotify");
++		Util.loadNative();
+ 		int res = nativeInit();
+ 		if (res != 0)
+ 		{
+diff -ru jnotify-0.94/net/contentobjects/jnotify/macosx/JNotify_macosx.java jnotify-0.94-briar/net/contentobjects/jnotify/macosx/JNotify_macosx.java
+--- jnotify-0.94/net/contentobjects/jnotify/macosx/JNotify_macosx.java	2010-01-26 19:43:42.000000000 +0000
++++ jnotify-0.94-briar/net/contentobjects/jnotify/macosx/JNotify_macosx.java	2014-01-30 12:31:41.959082350 +0000
+@@ -1,6 +1,7 @@
+ package net.contentobjects.jnotify.macosx;
+ 
+ import net.contentobjects.jnotify.JNotifyException;
++import net.contentobjects.jnotify.Util;
+ 
+ public class JNotify_macosx
+ {
+@@ -10,7 +11,7 @@
+ 
+ 	static
+ 	{
+-		System.loadLibrary("jnotify"); //$NON-NLS-1$
++		Util.loadNative();
+ 		Thread thread = new Thread("FSEvent thread") //$NON-NLS-1$
+ 		{
+ 			public void run()
+diff -ru jnotify-0.94/net/contentobjects/jnotify/Util.java jnotify-0.94-briar/net/contentobjects/jnotify/Util.java
+--- jnotify-0.94/net/contentobjects/jnotify/Util.java	2006-02-14 08:18:10.000000000 +0000
++++ jnotify-0.94-briar/net/contentobjects/jnotify/Util.java	2014-01-30 12:31:41.959082350 +0000
+@@ -30,4 +30,26 @@
+ 			return "UNKNOWN";
+ 		}
+ 	}
++
++   public static void loadNative() throws UnsatisfiedLinkError {
++       try
++       {
++           try
++           {
++               System.loadLibrary("jnotify");
++           }
++           catch (UnsatisfiedLinkError e) {
++               System.loadLibrary("jnotify-" + System.getProperty("os.arch"));
++           }
++       }
++       catch (UnsatisfiedLinkError e)
++       {
++           // add some extra debugging info
++           String msg = "Error loading library, os.arch=" + System.getProperty("os.arch") +
++             ", java.library.path=" + System.getProperty("java.library.path");
++           UnsatisfiedLinkError e2 = new UnsatisfiedLinkError(msg);
++           e2.initCause(e);
++           throw e2;
++       }
++   }
+ }
+diff -ru jnotify-0.94/net/contentobjects/jnotify/win32/JNotify_win32.java jnotify-0.94-briar/net/contentobjects/jnotify/win32/JNotify_win32.java
+--- jnotify-0.94/net/contentobjects/jnotify/win32/JNotify_win32.java	2012-04-25 00:04:50.000000000 +0100
++++ jnotify-0.94-briar/net/contentobjects/jnotify/win32/JNotify_win32.java	2014-01-30 12:31:41.959082350 +0000
+@@ -39,28 +39,13 @@
+ package net.contentobjects.jnotify.win32;
+ 
+ import net.contentobjects.jnotify.JNotifyException;
+-
++import net.contentobjects.jnotify.Util;
+ 
+ public class JNotify_win32
+ {
+ 	static
+ 	{
+-		try
+-		{
+-			if (System.getProperty("os.arch").equals("amd64"))
+-			{
+-				System.loadLibrary("jnotify_64bit");
+-			}
+-			else
+-			{
+-				System.loadLibrary("jnotify");
+-			}
+-		}
+-		catch (UnsatisfiedLinkError e)
+-		{
+-			System.err.println("Error loading library, java.library.path=" + System.getProperty("java.library.path"));
+-			throw e;
+-		}
++		Util.loadNative();
+ 		int res = nativeInit();
+ 		if (res != 0)
+ 		{