EDIT

<%@page import="org.codehaus.jackson.node.JsonNodeFactory"

%><%@page import="org.codehaus.jackson.node.ArrayNode"

%><%@ page contentType="application/json;charset=UTF-8" language="java"

%><%@page import="java.util.Set"

%><%@page import="org.codehaus.jackson.map.ObjectMapper"

%><%@page import="org.codehaus.jackson.JsonNode"

%><%@page import="org.codehaus.jackson.node.ObjectNode"

%><%@page import="eu.etaxonomy.cdm.server.JvmManager"

%><%@page import="java.lang.management.MemoryUsage"

%><%@page import="org.codehaus.jackson.JsonFactory"

%><%@page import="org.codehaus.jackson.JsonGenerator"

%><%@page import="org.codehaus.jackson.map.ser.StdSerializerProvider"

%><%@page import="eu.etaxonomy.cdm.server.Bootloader"

%><%

    //the servelt context must use the class loader of the Bootloader class otherwise

    //getting the status will not work in mulithreading environments !!!

    Bootloader bootloader = Bootloader.getBootloader();

    long recommendedMinimumHeap = bootloader.recommendedMinimumSpace(Bootloader.HEAP_CDMSERVER, Bootloader.HEAP_PER_INSTANCE, null);

    long recommendedMinimumPermGenSpace = bootloader.recommendedMinimumSpace(Bootloader.PERM_GEN_SPACE_CDMSERVER, Bootloader.PERM_GEN_SPACE_PER_INSTANCE, null);

    ObjectMapper jsonMapper = new ObjectMapper();

    response.setHeader("Content-Type", "application/json;charset=UTF-8");

    MemoryUsage  heapMemoryUsage = JvmManager.getHeapMemoryUsage();

    MemoryUsage  permGenSpaceUsage = JvmManager.getPermGenSpaceUsage();

    ObjectNode node = jsonMapper.createObjectNode();

    node.put("recommendedMinimumHeap", recommendedMinimumHeap);

    node.put("recommendedMinimumPermGenSpace", recommendedMinimumPermGenSpace);

    node.putPOJO("heapMemoryUsage", heapMemoryUsage);

    node.putPOJO("permGenSpaceUsage", permGenSpaceUsage);

    JsonFactory jsonFactory = new JsonFactory();

    JsonGenerator jg = jsonFactory.createJsonGenerator(out);

    jg.setCodec(jsonMapper);

    node.serialize(jg, new StdSerializerProvider());

    out.append("}"); //TODO why do we have to add the closing bracket ecplicitely ???? ==> it seems as if the serialization stops at some point du to an exception

%>