add write type criteria to distribute spectrum attributes on collectors

hdbarchiver/src/main/java/org/tango/archiving/collector/CollectorPool.java

@@ -149,11 +149,11 @@ public class CollectorPool {
         PollingMode pollingMode;
         if (config.getAttributeConfig().getFormat() != AttrDataFormat._SCALAR) {
             pollingMode = new PollingMode(config.getAttributeConfig().getFormat(),
-                    config.getModes());
+                    config.getModes(), config.getAttributeConfig().getWriteType());
         } else {
             // Scalar, one collector per archiving mode
             pollingMode = new PollingMode(config.getAttributeConfig().getFormat(),
-                    config.getModes());
+                    config.getModes(), 0);
         }
         return pollingMode;
     }
@@ -271,10 +271,12 @@ public class CollectorPool {
     private static class PollingMode {
         private final int format;
         private final String mode;
+        private final int writable;
 
-        public PollingMode(int format, InsertionModes mode) {
+        public PollingMode(int format, InsertionModes mode, int writable) {
             this.format = format;
             this.mode = mode.toSimpleString();
+            this.writable= writable;
         }
 
         @Override
@@ -292,6 +294,7 @@ public class CollectorPool {
             return new ToStringBuilder(this)
                     .append("format", format)
                     .append("mode", mode)
+                    .append("writable", writable)
                     .toString();
         }
     }