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Problem with read POJO out of Space

Hi, I create a POJO class with a field of type of Hashtable. I have no problem to write it into space.But if the hashtable is filled with data , I failed to read the POJO out using template or query. And the Only way I found is to usetemplate identical to Data. Anyone has idea what's going wrong ,why I can't match the POJO, how can i retrieve the POJO from Space, Thanks

Sample Code

Main Program

import org.openspaces.core.GigaSpace; import org.springframework.beans.factory.InitializingBean;

import com.hp.engine.common.Data;

public class TestMain implements InitializingBean{

private GigaSpace gigaSpace;

public void setGigaSpace(GigaSpace gigaSpace) {
    this.gigaSpace = gigaSpace;

public void afterPropertiesSet() throws Exception {

                      Data a = new Data("1");

                      Data result = gigaSpace.take(new Data());
          System.out.println(result.getId());   // *Succeed when hashtable is empty*

                     Data b = new Data("2");
                     b.put("key","value"); // *Put some data in the hashtable in POJO*
                     result = gigaSpace.take(new Data()); // *Null reference, Failed*     
                     result = gigaSpace.take(new Data("2")); // *Null reference ,Failded again*

                     result = gigaSpace.take(b); // *succeed on if template is identical to original data*


Class POJO import java.util.Hashtable; import com.gigaspaces.annotation.pojo.SpaceClass; import com.gigaspaces.annotation.pojo.SpaceId;

@SpaceClass(replicate = false) public class Data {

private String id;

public Hashtable<String, String> data = new Hashtable<String,String>();

public Data(){


public Data(String id){
    this.id = id;

public String getId() {
    return id;

public void setId(String id) {
    this.id = id;

public Hashtable<String, String> getData() {
    return data;

public void setData(Hashtable<String, String> data) {
    this.data = data;

public void put(String key ,String value){
    data.put(key, value);

public String value(String key){
    return data.get(key);
public boolean equals(Object o){
    if(!(o instanceof Data)){
        return false;
        Data another = (Data) o ;
        return(another.getId() != null
        && another.getId().equals(getId())||another.getId() == getId());
public String toString()
    return " Data-" + id;


{quote}This thread was imported from the previous forum. For your reference, the original is [available here|http://forum.openspaces.org/thread.jspa?threadID=1967]{quote}

asked 2008-03-05 10:02:20 -0600

peng0 gravatar image

updated 2013-08-08 09:52:00 -0600

jaissefsfex gravatar image
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1 Answer

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You need to have the data member null in your template.


answered 2008-03-05 10:31:28 -0600

guy sayar gravatar image
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thanks, simple and works

peng0 gravatar imagepeng0 ( 2008-03-07 10:07:19 -0600 )edit

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Asked: 2008-03-05 10:02:20 -0600

Seen: 34 times

Last updated: Mar 05 '08