Create a cache for external map source - Error in parsing xml request.

When doing the following:
Create a cache for external map source
I get "error in parsing xml request" when setting the following
Map service Url:
http://neowms.sci.gsfc.nasa.gov/wms/wms?version=1.3.0&service=WMS&request=GetCapabilities
It looks like it is breaking on "&". Any suggestions?
Rob

Hi Chris,
thanks for your reply!
I've tried to add the following into persistence.xml (although I've read that eclipseLink uses L2 cache by default..):
<shared-cache-mode>ALL</shared-cache-mode>
Then I replaced the Cache bean with a stateless bean which has methods like
Genre findGenreCreateIfAbsent(String genreName){
Genre genre = genreDAO.findByName(genreName);
if (genre!=null){
return genre;
genre = //Build new genre object
genreDAO.persist(genre);
return genre;
As far as I undestood, the shared cache should automatically store the genre and avoid querying the DB multiple times for the same genre, but unfortunately this is not the case: if I use a FINE logging level, I see really a lot of SELECT queries, which I didn't see with my "home made" Cache...
I am really confused.. :(
Thanks again for helping + bye

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Iam developing a connector application.
Iam using OC4J 9.0.4 version(standalone) for deployment of RAR file. We are parsing the below xml in our application using SAX parser.
<?xml version="1.0" encoding="utf-8"?>
<DocAnnoList xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" LibName="IMGSERV" DocID="1698353" SystemType="1">
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Hello everybody! I have recently got started with JPA 2.0 (I use eclipseLink) and EJB 3.1 and have a problem to figure out how to best implement a cache for my JPA Entities using an EJB.
In the following I try to describe my problem.. I know it is a bit verbose, but hope somebody will help me.. (I highlighted in bold the core of my problem, in case you want to first decide if you can/want help and in the case spend another couple of minutes to understand the domain)
I have the following JPA Entities:
@Entity Genre{
private String name;
@OneToMany(mappedBy = "genre", cascade={CascadeType.MERGE, CascadeType.PERSIST})
private Collection<Novel> novels;
@Entity
class Novel{
@ManyToOne(cascade={CascadeType.MERGE, CascadeType.PERSIST})
private Genre genre;
private String titleUnique;
@OneToMany(mappedBy="novel", cascade={CascadeType.MERGE, CascadeType.PERSIST})
private Collection<NovelEdition> editions;
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class NovelEdition{
private String publisherNameUnique;
private String year;
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private String name;
@OneToMany(mappedBy = "appearsInCatalog", cascade = {CascadeType.MERGE, CascadeType.PERSIST})
private Collection<NovelEdition> novelsInCatalog;
The idea is to have several Novels, belonging each to a specific Genre, for which can exist more than an edition (different publisher, year, etc). For semplicity a NovelEdition can belong to just one Catalog, being such a Catalog represented by such a text file:
FILE 1:
Catalog: Name Of Catalog 1
"Title of Novel 1", "Genre1 name","Publisher1 Name", 2009
"Title of Novel 2", "Genre1 name","Pulisher2 Name", 2010
FILE 2:
Catalog: Name Of Catalog 2
"Title of Novel 1", "Genre1 name","Publisher2 Name", 2011
"Title of Novel 2", "Genre1 name","Pulisher1 Name", 2011
Each entity has associated a Stateless EJB that acts as a DAO, using a Transaction Scoped EntityManager. For example:
@Stateless
public class NovelDAO extends AbstractDAO<Novel> {
@PersistenceContext(unitName = "XXX")
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protected EntityManager getEntityManager() {
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public NovelDAO() {
super(Novel.class);
//NovelDAO Specific methods
I am interested at when the catalog files are parsed and the corresponding entities are built (I usually read a whole batch of Catalogs at a time).
Being the parsing a String-driven procedure, I don't want to repeat actions like novelDAO.getByName("Title of Novel 1") so I would like to use a centralized cache for mappings of type String-Identifier->Entity object.
Currently I use +3 Objects+:
1) The file parser, which does something like:
final CatalogBuilder catalogBuilder = //JNDI Lookup
//for each file:
String catalogName = parseCatalogName(file);
catalogBuilder.setCatalogName(catalogName);
//For each novel edition
String title= parseNovelTitle();
String genre= parseGenre();
catalogBuilder.addNovelEdition(title, genre, publisher, year);
//End foreach
catalogBuilder.build();
2) The CatalogBuilder is a Stateful EJB which uses the Cache and gets re-initialized every time a new Catalog file is parsed and gets "removed" after a catalog is persisted.
@Stateful
public class CatalogBuilder {
@PersistenceContext(unitName = "XXX", type = PersistenceContextType.EXTENDED)
private EntityManager em;
@EJB
private Cache cache;
private Catalog catalog;
@PostConstruct
public void initialize() {
catalog = new Catalog();
catalog.setNovelsInCatalog(new ArrayList<NovelEdition>());
public void addNovelEdition(String title, String genreStr, String publisher, String year){
Genre genre = cache.findGenreCreateIfAbsent(genreStr);//##
Novel novel = cache.findNovelCreateIfAbsent(title, genre);//##
NovelEdition novEd = new NovelEdition();
novEd.setNovel(novel);
//novEd.set publisher year catalog
catalog.getNovelsInCatalog().add();
public void setCatalogName(String name) {
catalog.setName(name);
@Remove
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em.merge(catalog);
3) Finally, the problematic bean: Cache. For CatalogBuilder I used an EXTENDED persistence context (which I need as the Parser executes several succesive transactions) together with a Stateful EJB; but in this case I am not really sure what I need. In fact, the cache:
Should stay in memory until the parser is finished with its job, but not longer (should not be a singleton) as the parsing is just a very particular activity which happens rarely.
Should keep all of the entities in context, and should return managed entities form mehtods marked with ##, otherwise the attempt to persist the catalog should fail (duplicated INSERTs)..
Should use the same persistence context as the CatalogBuilder.
What I have now is :
@Stateful
public class Cache {
@PersistenceContext(unitName = "XXX", type = PersistenceContextType.EXTENDED)
private EntityManager em;
@EJB
private sessionbean.GenreDAO genreDAO;
//DAOs for other cached entities
Map<String, Genre> genreName2Object=new TreeMap<String, Genre>();
@PostConstruct
public void initialize(){
for (Genre g: genreDAO.findAll()) {
genreName2Object.put(g.getName(), em.merge(g));
public Genre findGenreCreateIfAbsent(String genreName){
if (genreName2Object.containsKey(genreName){
return genreName2Object.get(genreName);
Genre g = new Genre();
g.setName();
g.setNovels(new ArrayList<Novel>());
genreDAO.persist(t);
genreName2Object.put(t.getIdentifier(), em.merge(t));
return t;
But honestly I couldn't find a solution which satisfies these 3 points at the same time. For example, using another stateful bean with an extended persistence context (PC) would work for the 1st parsed file, but I have no idea what should happen from the 2nd file on.. Indeed, for the 1st file the PC will be created and propagated from CatalogBuilder to Cache, which will then use the same PC. But after build() returns, the PC of CatalogBuilder should (I guess) be removed and re-created during the succesive parsing, although the PC of Cache should stay "alive": shouldn't in this case an exception being thrown? Another problem is what to do when the Cache bean is passivated. Currently I get the exception:
"passivateEJB(), Exception caught ->
java.io.IOException: java.io.IOException
at com.sun.ejb.base.io.IOUtils.serializeObject(IOUtils.java:101)
at com.sun.ejb.containers.util.cache.LruSessionCache.saveStateToStore(LruSessionCache.java:501)"
Hence, I have no Idea how to implement my cache.. Can you please tell me how would you solve the problem?
Many thanks!
Bye

Hi Chris,
thanks for your reply!
I've tried to add the following into persistence.xml (although I've read that eclipseLink uses L2 cache by default..):
<shared-cache-mode>ALL</shared-cache-mode>
Then I replaced the Cache bean with a stateless bean which has methods like
Genre findGenreCreateIfAbsent(String genreName){
Genre genre = genreDAO.findByName(genreName);
if (genre!=null){
return genre;
genre = //Build new genre object
genreDAO.persist(genre);
return genre;
As far as I undestood, the shared cache should automatically store the genre and avoid querying the DB multiple times for the same genre, but unfortunately this is not the case: if I use a FINE logging level, I see really a lot of SELECT queries, which I didn't see with my "home made" Cache...
I am really confused.. :(
Thanks again for helping + bye

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Dear Gurus
I have Created one Table Maintenance for TABLES: J_2IRG1BAL ,
1) I have take function group as same as table name like J_2IRG1BAL
3) Authorization Group &NC&
4) Authorization object S_TABU_DIS
5) Function group J_2IRG1BAL
6) Package J1I5
7) Maintenance type one step.
8) Maint. Screen No. Overview screen 2009.
9) Recording routine STD recording routines .
I have assign screen single screen 1 but it will not take the screen so ill put screen 2009 ,the system will not not accept the screen but I proposed to Save and activate the table maintenance generator and created and save the function group ,the table is ready to save the entries
We have to go to SM30 then put 4-5 entries ,after that a dump error shows
Which i have attachéd in this mail kindly help me out
Its effect in production server.
I have found that the error is given below I have mentioned all the details
Kindly read this
I have created function group J_2IRG1BAL and assign Package J1I5 and function group,J1I5 is already a Function group so problem occurs a dump error message displays
Kindly give me the right solution all the Clients are effected
110,100 150,250 these all are effected development clients
300 is prod client this is also affected because I have created a table maintenance generator and send the req to production .
*Dump Error Shows in Production*
Runtime Errors SYNTAX_ERROR
Date and Time 11.12.2008 09:26:30
What happened?
| Error in ABAP application program.
Error analysis
In program "SAPLJ1I5 ", the following syntax error occurred:
"The program "SAPLJ1I5" is not Unicode-compatible, according to its pro"
"gram attributes."
The current ABAP program "SAPLSVIM" had to be terminated because one of the
statements could not be executed.
This is probably due to an error in the ABAP program.
In program "SAPLJ1I5 ", the following syntax error occurred
in the Include "SAPLJ1I5 " in line 0:
"The program "SAPLJ1I5" is not Unicode-compatible, according to its pro"
"gram attributes."
rigger Location of Runtime Error |
Program SAPLSVIM
Include LSVIMU01
Row 107
Module type (FUNCTION)
| Module Name VIEW_MAINTENANCE
Author and last person to change the Include are:
Author "TTLABAP2 "
Last changed by "TTLABAP2 "
105
Initialisierung des Abgleichsmandanten zum View *
106
>>>>>
vim_default_upgr_clnt-viewname = x_header-viewname.
108
vim_default_upgr_clnt-client = client_for_upgrade.
109
PERFORM vim_set_global_field_value IN PROGRAM (fpool)
| 110| USING 'VIM_DEFAULT_UPGR_CLNT' 'C' vim_default_upgr_clnt rc.

I have send you all the details regarding the table maintenance generator
error is shown below
 I have Created one Table Maintenance for TABLES: J_2IRG1BAL ,
1) I have take function group as same as table name like J_2IRG1BAL
3) Authorization Group &NC&
4) Authorization object S_TABU_DIS
5) Function group J_2IRG1BAL
6) Package J1I5
7) Maintenance type one step.
8) Maint. Screen No. Overview screen 2009.
9) Recording routine STD recording routines .
I have assign screen single screen 1 but it will not take the screen so ill put screen 2009 ,the system will not not accept the screen but I proposed to Save and activate the table maintenance generator and created and save the function group ,the table is ready to save the entries
We have to go to SM30 then put 4-5 entries ,after that a dump error shows
Which i have attachéd in this mail kindly help me out
Its effect in production server.
I have found that the error is given below I have mentioned all the details
Kindly read this
I have created function group J_2IRG1BAL and assign Package J1I5 and function group,J1I5 is already a Function group so problem occurs a dump error message displays
Kindly give me the right solution all the Clients are effected
110,100 150,250 these all are effected development clients
300 is prod client this is also affected because I have created a table maintenance generator and send the req to production .
 Runtime Errors SYNTAX_ERROR
Date and Time 11.12.2008 09:26:30
ShrtText
Syntax error in program "SAPLJ1I5 ".
What happened?
Error in ABAP application program.
The current ABAP program "SAPLSVIM" had to be terminated because one of the
statements could not be executed.
This is probably due to an error in the ABAP program.
In program "SAPLJ1I5 ", the following syntax error occurred
in the Include "SAPLJ1I5 " in line 0:
"The program "SAPLJ1I5" is not Unicode-compatible, according to its pro"
"gram attributes."
Author and last person to change the Include are:
Author "TTLABAP2 "
Last changed by "TTLABAP2 "
Error analysis
In program "SAPLJ1I5 ", the following syntax error occurred:
"The program "SAPLJ1I5" is not Unicode-compatible, according to its pro"
"gram attributes."
Trigger Location of Runtime Error
Program SAPLSVIM
Include LSVIMU01
Row 107
Module type (FUNCTION)
Module Name VIEW_MAINTENANCE
Source Code Extract
Line
SourceCde
77
TRANSPORTING NO FIELDS.
78
IF sy-subrc NE 0.
79
SELECT SINGLE * FROM tfdir WHERE funcname EQ <function_name>.
80
IF sy-subrc NE 0.
81
RAISE no_editor_function.
82
ELSE.
83
length = strlen( function_name1 ).
84
ASSIGN function_name1(length) TO <function_name>.
85
SELECT SINGLE * FROM tfdir WHERE funcname EQ <function_name>.
86
IF sy-subrc NE 0.
87
RAISE no_database_function.
88
ENDIF.
89
ENDIF.
90
INSERT x_header-viewname INTO alr_checked_views INDEX sy-tabix.
91
ELSE.
92
length = strlen( function_name1 ).
93
ASSIGN function_name1(length) TO <function_name>.
94
ENDIF.
95
96
Initialisierung der RFC-Destination zum View *
97
98
FPOOL+4 = X_HEADER-AREA.
99
fpool = x_header-fpoolname.
100
vim_default_rfc_dest-viewname = x_header-viewname.
101
vim_default_rfc_dest-rfcdest = rfc_destination_for_upgrade.
102
PERFORM vim_set_global_field_value IN PROGRAM (fpool)
103
USING 'VIM_DEFAULT_RFC_DEST' 'C' vim_default_rfc_dest rc.
104
105
Initialisierung des Abgleichsmandanten zum View *
106
>>>>>
vim_default_upgr_clnt-viewname = x_header-viewname.
108
vim_default_upgr_clnt-client = client_for_upgrade.
109
PERFORM vim_set_global_field_value IN PROGRAM (fpool)
110
USING 'VIM_DEFAULT_UPGR_CLNT' 'C' vim_default_upgr_clnt rc.
111
112
set flag if complex selection conditions in sellist *
113
114
IF complex_selconds_used NE space.
115
READ TABLE dba_sellist INDEX 1.
116
IF sy-subrc EQ 0 AND dba_sellist-cond_kind EQ space.
117
dba_sellist-cond_kind = 'C'. MODIFY dba_sellist INDEX 1.
118
ENDIF.
119
ENDIF.
120
121
direkter Vergleich: Flagge setzen usw. *
122
123
IF view_action EQ vim_direct_upgrade.
124
view_action = aendern.
125
PERFORM vim_set_global_field_value IN PROGRAM (fpool)
126
USING 'VIM_SPECIAL_MODE' 'C' vim_direct_upgrade rc.

Creating a cache for a game?

Hi, i'm creating (trying) a game. Now i've been thinking about everything goes and i came with the question about how i to load data about maps, objects etc. It is a 2d game using tiles
So i know runescape uses a cache to store their data about these.
But i've NO idea how i could make it?
Someone told me i this:
"use dataOutputStream to create a data cache along with an index file being the offsets and lengths of the required data."
- I know we use dataOutputStream to load/save.
- I know how to encrypt (this is not important atm)
- I don't know how i define a tile for an x or y (*)
- I don't know how i've to make a data cache ?
- I don't understand what he means by an index file with the offsets and lengths?
(*) How do 2d games load it? They use xml? or just text files ? like
// x -tab- y -tab- floor
0 -tab- 0 -tab- 1 so the above says on x = 0 and y = 0 floor = 1 (grass for example)
Please if anyone could give me an example of this it would be great !!!
This is really important!
Thanks in advance!
Edited by: Kolarius on Feb 7, 2009 1:39 AM
Edited by: Kolarius on Feb 7, 2009 1:41 AM
Edited by: Kolarius on Feb 7, 2009 1:55 AM

What you're asking is a bit like this: "I want to build a house, what is the best way to make a roof?". I mean, you should first create a foundation, on that foundation you build your walls and on top of that, you can eventually build a roof.
First get a decent grip on the language Java: [http://java.sun.com/docs/books/tutorial/java/index.html]
Then delve into some more specific graphic stuff with Java: [http://java.sun.com/docs/books/tutorial/2d/index.html]
And only then proceed to creating your own game: [http://www.gamedev.net/reference/articles/article1262.asp]
If you get stuck anywhere along the lines, feel free to post a specific question in the relevant part of this forum (there's a 2D section, a Game section and this section can be used to ask general Java questions). The question you now posted is nowhere near specific enough: it just can't be answered in a few lines of code or a (fairly) short explanation.

External Map Source Adapter - MapViewer


Hi
I am developing an application using Oracle Maps of OracleMapViewer 10.1.3 using OC4J


The objective of this exercise is to make use of a cache generated by a non-MapViewer solution. The cache is stored at an external location and can be accessed by sending multiple HTTP requests. For any given extent, multiple HTTP requests needs to be sent to access the individual tiles covering the given area.
http://servername/mapname/cache?level=0&row=11&column=1
http://servername/mapname/cache?level=0&row=11&column=2
http://servername/mapname/cache?level=0&row=12column=1
http://servername/mapname/cache?level=0&row=12&column=2
The logic to identify the tiles is also available. The problem is that the getMapTileRequest(...) returns only one string and this when passed would return only one image tile. (Correct me if my understanding is wrong)
public abstract class MapSourceAdapter
public abstract String getMapTileRequest(TileDefinition tile);
public byte[] getTileImageBytes(TileDefinition tile) ;
public Properties getProperties() ;
One option is to have a servlet at the other end that would accept the extent and zoom level and then identify the tiles. But still it is not clear as whether MapViewer will accept one response or multiple responses from the external server.
Need some guidance in this aspect
Regards
Govindarajan


1. The mapviewer tile servlet can response to multiple tile requests simultaneously. It makes multiple calls to the getMapTileRequest method, each of which gets the URL for one tile. So if you can define the map tile layer(map cache instance) in such a way that its tiles have the same size as the external tiles, mapviewer should be able to handle the tile requests without problem. You also need to modify the XML tile layer(map cache instance) definition and add parameter "fetch_larger_tiles" to the root node and set its value to "false". Without this change, mapviewer will fetch map images that are several times larger than the actual tiles and cut them into tiles later on.
2. With the latest patch, you can define a custom tile layer on the client side and fetch the tiles directly from the non-mapviewer tile server. Because this approach does not duplicate the tiles in mapviewer's tile cache, it is better than 1 if the non-mapviewer tile server can serve the tiles as fast as mapviewer. Demo #50 on the mapviewer tutorial page shows how to use custom tile layer.

Hide messages for External Interface Program Error

Hi,
I am facing problem in removing the external interface errors encountered during EPC of a Y program. Can you please suggest any solution for hiding the error in the custom Y program using #EC.
Regards,
Kajari

Hello IvoK,
The 9881 needs to be externally powered. You can do it with a CAN Breakout Box or with a CAN cable.
Regards
Mélinda B
National Instruments France
#adMrkt{text-align: center;font-size:11px; font-weight: bold;} #adMrkt a {text-decoration: none;} #adMrkt a:hover{font-size: 9px;} #adMrkt a span{display: none;} #adMrkt a:hover span{display: block;}
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Create a cache for external map source - Error in parsing xml request.

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