tried too fix serverSwitch synchronization problems

see also: http://www.yacy-forum.de/viewtopic.php?p=16110#16110

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@1499 6c8d7289-2bf4-0310-a012-ef5d649a1542

source/de/anomic/server/serverAbstractSwitch.java

@@ -53,6 +53,8 @@ import de.anomic.server.serverAbstractSwitch;
 
 public abstract class serverAbstractSwitch implements serverSwitch {
 
+    private static final long delayBetweenSave = 2000;
+    
     // configuration management
     private final File      configFile;
     private Map             configProps;
@@ -64,6 +66,7 @@ public abstract class serverAbstractSwitch implements serverSwitch {
     private final TreeMap   switchActions;
     protected serverLog     log;
     protected int           serverJobs;
+    private long            lastTimeSaved;
     
     public serverAbstractSwitch(String rootPath, String initPath, String configPath) {
         // we initialize the switchboard with a property file,
@@ -130,6 +133,9 @@ public abstract class serverAbstractSwitch implements serverSwitch {
 
         // init busy state control
         serverJobs = 0;
+        
+        // save control
+        lastTimeSaved = System.currentTimeMillis();
     }
     
     // a logger for this switchboard
@@ -147,6 +153,7 @@ public abstract class serverAbstractSwitch implements serverSwitch {
 
     public void setConfig(String key, String value) {
         // perform action before setting new value
+        synchronized (configProps) {
             Map.Entry entry;
             serverSwitchAction action;
             Iterator i = switchActions.entrySet().iterator();
@@ -176,8 +183,10 @@ public abstract class serverAbstractSwitch implements serverSwitch {
                 }
             }
         }
+    }
 
     public String getConfig(String key, String dflt) {
+        synchronized (configProps) {
             // get the value
             Object s = configProps.get(key);
 
@@ -196,7 +205,9 @@ public abstract class serverAbstractSwitch implements serverSwitch {
             }
 
             // return value
-	if (s == null) return dflt; else return (String)s;
+            if (s == null) return dflt;
+            else return (String) s;
+        }
     }
     
     public long getConfigLong(String key, long dflt) {
@@ -212,11 +223,16 @@ public abstract class serverAbstractSwitch implements serverSwitch {
     }
 
     private void saveConfig() {
+        if (System.currentTimeMillis() > this.lastTimeSaved + delayBetweenSave) {
             try {
+                synchronized (configProps) {
                     serverFileUtils.saveMap(configFile, configProps, configComment);
+                }
             } catch (IOException e) {
                 System.out.println("ERROR: cannot write config file " + configFile.toString() + ": " + e.getMessage());
             }
+            this.lastTimeSaved = System.currentTimeMillis();
+        }
     }
 
     public Map getRemoved() {

source/yacy.java

@@ -433,13 +433,13 @@ public final class yacy {
                     run.addShutdownHook(new shutdownHookThread(Thread.currentThread(), sb));
 
                     // save information about available memory after all initializations
-                    try {
+                    //try {
                         sb.setConfig("memoryFreeAfterInitBGC", Runtime.getRuntime().freeMemory());
                         sb.setConfig("memoryTotalAfterInitBGC", Runtime.getRuntime().totalMemory());
                         System.gc();
                         sb.setConfig("memoryFreeAfterInitAGC", Runtime.getRuntime().freeMemory());
                         sb.setConfig("memoryTotalAfterInitAGC", Runtime.getRuntime().totalMemory());
-                    } catch (ConcurrentModificationException e) {}
+                    //} catch (ConcurrentModificationException e) {}
                     
                     // wait for server shutdown
                     try {