Fix TempFileCache/LauncherTempFileCache (regression commit: 1468286bf569a493e4fdb887d5f3732f88c8cec3) 'update' scenario in same JVM instance.v2.0-rc9

TempFileCache/LauncherTempFileCache were using the system property
'jnlp.jogamp.tmp.cache.root', if set.

However, in case one JVM launched an old GlueGen (Applet)
and then launching a new GlueGen (Applet) w/ a new tmpDir location,
the property is still set but the tmpRootDir location does not exist.
This patch tolerates this situation and cont. setting a new tmpRootDir.
Example:
  JVM1.GlueGen1 tmpDir: /tmp/,             tmpRootDir: /tmp/jogamp.tmp.cache_000000/
  JVM1.GlueGen2 tmpDir: /tmp/jogamp_0000/, tmpRootDir: /tmp/jogamp_0000/file_cache/

Misc:
  - IOUtil: Always use 'jogamp_xxxx' as the sys-temp subfolder for tmpDir
  - JNILibLoaderBase: Remove unised import
  - TempJarCache.validateCertificates(): Add OK DEBUG output.

4 files changed, 47 insertions, 35 deletions

diff --git a/src/java/com/jogamp/common/jvm/JNILibLoaderBase.java b/src/java/com/jogamp/common/jvm/JNILibLoaderBase.java
index 32f5101..60f3060 100644
--- a/src/java/com/jogamp/common/jvm/JNILibLoaderBase.java
+++ b/src/java/com/jogamp/common/jvm/JNILibLoaderBase.java
@@ -47,7 +47,6 @@ import java.security.PrivilegedAction;
 import java.util.HashSet;
 
 import com.jogamp.common.os.NativeLibrary;
-import com.jogamp.common.os.Platform;
 import com.jogamp.common.util.JarUtil;
 import com.jogamp.common.util.PropertyAccess;
 import com.jogamp.common.util.cache.TempJarCache;
diff --git a/src/java/com/jogamp/common/util/IOUtil.java b/src/java/com/jogamp/common/util/IOUtil.java
index 19ae683..09094bf 100644
--- a/src/java/com/jogamp/common/util/IOUtil.java
+++ b/src/java/com/jogamp/common/util/IOUtil.java
@@ -773,9 +773,8 @@ public class IOUtil {
     /**
      * This methods finds [and creates] an available temporary sub-directory:
      * <pre>
-           File tmpBaseDir;    
+           File tmpBaseDir = null;    
            if(null != testDir(tmpRoot, true, executable)) { // check tmpRoot first
-               tmpBaseDir = testDir(new File(tmpRoot, tmpSubDirPrefix), true, executable);
                for(int i = 0; null == tmpBaseDir && i<=9999; i++) {
                    final String tmpDirSuffix = String.format("_%04d", i); // 4 digits for iteration
                    tmpBaseDir = testDir(new File(tmpRoot, tmpSubDirPrefix+tmpDirSuffix), true, executable);
@@ -797,9 +796,8 @@ public class IOUtil {
     private static File getSubTempDir(File tmpRoot, String tmpSubDirPrefix, boolean executable)
         throws SecurityException
     {
-       File tmpBaseDir;    
+       File tmpBaseDir = null;    
        if(null != testDirImpl(tmpRoot, true /* create */, executable)) { // check tmpRoot first
-           tmpBaseDir = testDirImpl(new File(tmpRoot, tmpSubDirPrefix), true /* create */, executable);
            for(int i = 0; null == tmpBaseDir && i<=9999; i++) {
                final String tmpDirSuffix = String.format("_%04d", i); // 4 digits for iteration
                tmpBaseDir = testDirImpl(new File(tmpRoot, tmpSubDirPrefix+tmpDirSuffix), true /* create */, executable);
@@ -897,7 +895,7 @@ public class IOUtil {
     /**
      * Returns a platform independent writable directory for temporary files
      * consisting of the platform's {@code temp-root} + {@link #tmpSubDir}, 
-     * e.g. {@code /tmp/jogamp/}. 
+     * e.g. {@code /tmp/jogamp_0000/}. 
      * <p>
      * On standard Java the {@code temp-root} folder is specified by <code>java.io.tempdir</code>.
      * </p> 
@@ -911,7 +909,7 @@ public class IOUtil {
      * </p>
      * <p>
      * In case {@code temp-root} is the users home folder,
-     * a dot is being prepended to {@link #tmpSubDir}, i.e.: {@code /home/user/.jogamp/}. 
+     * a dot is being prepended to {@link #tmpSubDir}, i.e.: {@code /home/user/.jogamp_0000/}. 
      * </p>
      * @param executable true if the user intents to launch executables from the temporary directory, otherwise false.
      * @param acc The security {@link AccessControlContext} to access properties, environment vars, create directories and test <i>executability</i> 
diff --git a/src/java/com/jogamp/common/util/cache/TempFileCache.java b/src/java/com/jogamp/common/util/cache/TempFileCache.java
index 7eebbd0..755ed7b 100644
--- a/src/java/com/jogamp/common/util/cache/TempFileCache.java
+++ b/src/java/com/jogamp/common/util/cache/TempFileCache.java
@@ -132,17 +132,19 @@ public class TempFileCache {
      *        system property.
      *
      *         a. If set, then some other thread in a different ClassLoader has
-     *            already created the tmprootdir, so we just need to
+     *            already created the tmpRootDir, so we just need to
      *            use it. The remaining steps are skipped.
+     *            However, we check the existence of the tmpRootDir
+     *            and if non existent, we assume a new launch and continue.
      *
      *         b. If not set, then we are the first thread in this JVM to run,
-     *            and we need to create the the tmprootdir.
+     *            and we need to create the the tmpRootDir.
      *
-     *     3. Create the tmprootdir, along with the appropriate locks.
+     *     3. Create the tmpRootDir, along with the appropriate locks.
      *        Note that we perform the operations in the following order,
-     *        prior to creating tmprootdir itself, to work around the fact that
+     *        prior to creating tmpRootDir itself, to work around the fact that
      *        the file creation and file lock steps are not atomic, and we need
-     *        to ensure that a newly-created tmprootdir isn't reaped by a
+     *        to ensure that a newly-created tmpRootDir isn't reaped by a
      *        concurrently running JVM.
      *
      *            create jlnNNNN.tmp using File.createTempFile()
@@ -170,6 +172,36 @@ public class TempFileCache {
     private static void initTmpRoot() throws IOException {
         tmpRootPropValue = System.getProperty(tmpRootPropName);
 
+        if (tmpRootPropValue != null) {
+            // Make sure that the property is not set to an illegal value
+            if (tmpRootPropValue.indexOf('/') >= 0 ||
+                    tmpRootPropValue.indexOf(File.separatorChar) >= 0) {
+                throw new IOException("Illegal value of: " + tmpRootPropName);
+            }
+
+            // Set tmpRootDir = ${tmpbase}/${jnlp.applet.launcher.tmproot}
+            if (DEBUG) {
+                System.err.println("TempFileCache: Trying existing value of: " +
+                        tmpRootPropName + "=" + tmpRootPropValue);
+            }
+            tmpRootDir = new File(tmpBaseDir, tmpRootPropValue);
+            if (DEBUG) {
+                System.err.println("TempFileCache: Trying tmpRootDir = " + tmpRootDir.getAbsolutePath());
+            }
+            if (tmpRootDir.isDirectory()) {
+                if (!tmpRootDir.canWrite()) {
+                    throw new IOException("Temp root directory is not writable: " + tmpRootDir.getAbsolutePath());
+                }
+            } else {
+                // It is possible to move to a new GlueGen version within the same JVM
+                // In case tmpBaseDir has changed, we should assume a new tmpRootDir.
+                System.err.println("TempFileCache: None existing tmpRootDir = " + tmpRootDir.getAbsolutePath()+", assuming new path due to update");
+                tmpRootPropValue = null;
+                tmpRootDir = null;
+                System.clearProperty(tmpRootPropName);
+            }
+        }
+        
         if (tmpRootPropValue == null) {
             // Create ${tmpbase}/jlnNNNN.tmp then lock the file
             File tmpFile = File.createTempFile("jln", ".tmp", tmpBaseDir);
@@ -241,28 +273,6 @@ public class TempFileCache {
             };
             reaperThread.setName("TempFileCache-Reaper");
             reaperThread.start();
-        } else {
-            // Make sure that the property is not set to an illegal value
-            if (tmpRootPropValue.indexOf('/') >= 0 ||
-                    tmpRootPropValue.indexOf(File.separatorChar) >= 0) {
-                throw new IOException("Illegal value of: " + tmpRootPropName);
-            }
-
-            // Set tmpRootDir = ${tmpbase}/${jnlp.applet.launcher.tmproot}
-            if (DEBUG) {
-                System.err.println("TempFileCache: Using existing value of: " +
-                        tmpRootPropName + "=" + tmpRootPropValue);
-            }
-            tmpRootDir = new File(tmpBaseDir, tmpRootPropValue);
-            if (DEBUG) {
-                System.err.println("TempFileCache: tmpRootDir = " + tmpRootDir.getAbsolutePath());
-            }
-            if (!tmpRootDir.isDirectory()) {
-                throw new IOException("Temp root directory does not exist: " + tmpRootDir.getAbsolutePath());
-            }
-            if (!tmpRootDir.canWrite()) {
-                throw new IOException("Temp root directory is not writable: " + tmpRootDir.getAbsolutePath());
-            }
         }
     }
 
diff --git a/src/java/com/jogamp/common/util/cache/TempJarCache.java b/src/java/com/jogamp/common/util/cache/TempJarCache.java
index 8aaab94..e4a77fe 100644
--- a/src/java/com/jogamp/common/util/cache/TempJarCache.java
+++ b/src/java/com/jogamp/common/util/cache/TempJarCache.java
@@ -411,6 +411,11 @@ public class TempJarCache {
             // In case one tries to run uncertified JARs, the wrapping applet/JNLP
             // SecurityManager will kick in and throw a SecurityException.
             JarUtil.validateCertificates(rootCerts, jarFile);
-        }                        
+            if(DEBUG) {
+                System.err.println("TempJarCache: validateCertificates: OK - Matching rootCerts in given class "+certClass.getName()+", nativeJar "+jarFile.getName());
+            }            
+        } else if(DEBUG) {
+            System.err.println("TempJarCache: validateCertificates: OK - No rootCerts in given class "+certClass.getName()+", nativeJar "+jarFile.getName());
+        }
     }    
 }