Software Development from Ryan

So aparently serialization was taking 100% of my application
cpu time. I’ve made some changes to the serialization and my apps cpu usage has gone from 100% with about 7 tables running, (approximately 60-80 clients constantaly serializing)
down to 10%. So with the same load on the server the cpu has 90% free
cycles now!

This is from making a few simple changes to
ServerSerializableTypeOracleImpl. Here’s what I did:

1)  Add a new static map to the class…

private static final Map CUSTOM_FIELD_SERIALIZERS = new HashMap();

2)  Add static initialization to the class…

static{
try{
        CUSTOM_FIELD_SERIALIZERS.put(”java.lang.boolean_Array”,
Class.forName(
“com.google.gwt.user.client.rpc.core.java.lang.boolean_Array_CustomFieldSer­ializer”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.lang.Boolean”,
Class.forName(
“com.google.gwt.user.client.rpc.core.java.lang.Boolean_CustomFieldSerialize­r”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.lang.byte_Array”,
Class.forName(
“com.google.gwt.user.client.rpc.core.java.lang.byte_Array_CustomFieldSerial­izer”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.lang.Byte”, Class.forName(
“com.google.gwt.user.client.rpc.core.java.lang.Byte_CustomFieldSerializer”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.lang.char_Array”,
Class.forName(
“com.google.gwt.user.client.rpc.core.java.lang.char_Array_CustomFieldSerial­izer”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.lang.Character”,
Class.forName(
“com.google.gwt.user.client.rpc.core.java.lang.Character_CustomFieldSeriali­zer”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.lang.double_Array”,
Class.forName(
“com.google.gwt.user.client.rpc.core.java.lang.double_Array_CustomFieldSeri­alizer”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.lang.Double”, Class.forName(
“com.google.gwt.user.client.rpc.core.java.lang.Double_CustomFieldSerializer­”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.lang.float_Array”,
Class.forName(
“com.google.gwt.user.client.rpc.core.java.lang.float_Array_CustomFieldSeria­lizer”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.lang.Float”, Class.forName(
“com.google.gwt.user.client.rpc.core.java.lang.Float_CustomFieldSerializer”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.lang.int_Array”,
Class.forName(
“com.google.gwt.user.client.rpc.core.java.lang.int_Array_CustomFieldSeriali­zer”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.lang.Integer”,
Class.forName(
“com.google.gwt.user.client.rpc.core.java.lang.Integer_CustomFieldSerialize­r”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.lang.long_Array”,
Class.forName(
“com.google.gwt.user.client.rpc.core.java.lang.long_Array_CustomFieldSerial­izer”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.lang.Long”, Class.forName(
“com.google.gwt.user.client.rpc.core.java.lang.Long_CustomFieldSerializer”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.lang.Object_Array”,
Class.forName(
“com.google.gwt.user.client.rpc.core.java.lang.Object_Array_CustomFieldSeri­alizer”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.lang.short_Array”,
Class.forName(
“com.google.gwt.user.client.rpc.core.java.lang.short_Array_CustomFieldSeria­lizer”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.lang.Short”, Class.forName(
“com.google.gwt.user.client.rpc.core.java.lang.Short_CustomFieldSerializer”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.lang.String”, Class.forName(
“com.google.gwt.user.client.rpc.core.java.lang.String_CustomFieldSerializer­”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.util.ArrayList”,
Class.forName(
“com.google.gwt.user.client.rpc.core.java.util.ArrayList_CustomFieldSeriali­zer”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.util.Date”, Class.forName(
“com.google.gwt.user.client.rpc.core.java.util.Date_CustomFieldSerializer”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.util.HashMap”,
Class.forName(
“com.google.gwt.user.client.rpc.core.java.util.HashMap_CustomFieldSerialize­r”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.util.HashSet”,
Class.forName(
“com.google.gwt.user.client.rpc.core.java.util.HashSet_CustomFieldSerialize­r”
) );
        CUSTOM_FIELD_SERIALIZERS.put(”java.util.Vector”, Class.forName(
“com.google.gwt.user.client.rpc.core.java.util.Vector_CustomFieldSerializer­”
) );
        } catch (ClassNotFoundException e) {
      // purposely ignored
    }

}

3) Change hasCustomFieldSerializer to use this map….

 public Class hasCustomFieldSerializer(Class instanceType) {
    String qualifiedTypeName;
    if (instanceType.isArray()) {
      Class componentType = instanceType.getComponentType();
      if (componentType.isPrimitive()) {
        qualifiedTypeName = “java.lang.” + componentType.getName();
      } else {
        qualifiedTypeName = Object.class.getName();
      }
      qualifiedTypeName += “_Array”;
    } else {
      qualifiedTypeName = instanceType.getName();
    }
    return (Class)CUSTOM_FIELD_SERIALIZERS.get(qualifiedTypeName);

}

Thats it! Although this limits the custom field serializaers
extensibility it works very well for me since i don’t have any custom
serializers.