# HG changeset patch
# User Jan Lahoda <jlahoda@netbeans.org>
# Date 1244564445 -7200
# Node ID 6912c1b3475d9f3073be6b2c5066c6cff4999cde
# Parent  362d4a0687107e69a07ce465fa3a16b5f9edd2b5
#158421: the IDE needs support for memory usage threshold - adding check to ensure the VM supports it. (backported from trunk, changesets cea8c226c1d5 and 6063da7c17b1).

diff --git a/parsing.api/src/org/netbeans/modules/parsing/impl/Bundle.properties b/parsing.api/src/org/netbeans/modules/parsing/impl/Bundle.properties
--- a/parsing.api/src/org/netbeans/modules/parsing/impl/Bundle.properties
+++ b/parsing.api/src/org/netbeans/modules/parsing/impl/Bundle.properties
@@ -42,3 +42,5 @@
 OpenIDE-Module-Short-Description=Parsing API
 OpenIDE-Module-Long-Description=Parsing API
 
+ERR_NoUsageThreshold=The JVM does not support memory usage threshold, which is needed for the IDE. For more details, see: \
+http://wiki.netbeans.org/NoMemoryUsageThreshold
diff --git a/parsing.api/src/org/netbeans/modules/parsing/impl/Installer.java b/parsing.api/src/org/netbeans/modules/parsing/impl/Installer.java
--- a/parsing.api/src/org/netbeans/modules/parsing/impl/Installer.java
+++ b/parsing.api/src/org/netbeans/modules/parsing/impl/Installer.java
@@ -4,8 +4,16 @@
  */
 package org.netbeans.modules.parsing.impl;
 
+import java.lang.management.ManagementFactory;
+import java.lang.management.MemoryPoolMXBean;
+import java.lang.management.MemoryType;
+import java.util.List;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 import org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater;
 import org.openide.modules.ModuleInstall;
+import org.openide.util.Exceptions;
+import org.openide.util.NbBundle;
 import org.openide.util.RequestProcessor;
 import org.openide.windows.WindowManager;
 
@@ -37,4 +45,31 @@
         RepositoryUpdater.getDefault().stop();
         return ret;
     }
+
+    @Override
+    public void validate() throws IllegalStateException {
+        super.validate();
+
+        long s = System.currentTimeMillis();
+        try {
+            List<MemoryPoolMXBean> pools = null;
+            pools = ManagementFactory.getMemoryPoolMXBeans();
+            for (MemoryPoolMXBean pool : pools) {
+                if (pool.getType() == MemoryType.HEAP && pool.isUsageThresholdSupported()) {    //NOI18N
+                    return ;
+                }
+            }
+
+            IllegalStateException e = new IllegalStateException("Cannot listen on usage threshold");
+
+            throw Exceptions.attachLocalizedMessage(e, NbBundle.getMessage(Installer.class, "ERR_NoUsageThreshold"));
+        } finally {
+            Logger log = Logger.getLogger(Installer.class.getName());
+
+            if (log.isLoggable(Level.FINE)) {
+                log.log(Level.FINE, "threshold supported check took: {0}", System.currentTimeMillis() - s);
+            }
+        }
+    }
+
 }