How to implement find methods in CMP?

As OC4J does not support EJB-QL, we need to implement the find methods by ourselves. But how? Here is my thought.
1) Still declare the find methods in EJB home, such as
public Collection findBySponsor(String sponsorGuid);
2) Do not add query part to ejb-jar.xml file;
3) In the bean class, implement the find method using JDBC code.
Does CMP allows explicit-implementation of finder methds?
Does CMP allows explicit-call to JDBC code?
Thanks,

Henry -- Why go to that trouble? For the near term I would suggest that you just modify the generated
orion-ejb-jar.xml descriptors which will include tags to allow you to either 1) enter a partial criteria or
2) enter a complete SQL statement. This is much less work and when EJB-QL is available with the product,
then you have to only add the EJB-QL to the ejb-jar.xml.
Thanks -- Jeff

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Finder methods for CMP beans

We do not implement finder method in Bean class for CMP. As such, where do we implement finder methods such as findInRange() method? How does the container implement my custom "find" methods.
Thanks

Using CMP 2.x, your custom finder and select methods are implemented by the container based on the EJB QL query you provide in the ejb-jar.xml. In CMP 1.1, there was no portable way to express the semantics of the query, so most vendors had a vendor-specific syntax for describing the query.
See chapter 27 of the J2EE 1.4 Tutorial for some examples of using EJB QL :
http://java.sun.com/j2ee/1.4/docs/tutorial/doc/index.html
--ken
Kenneth Saks
J2EE SDK Team
SUN Microsystems

How implement finder method with bean inheritance?

I have a ProductBean which is the super class of BookBean, ClothesBean and I want to create a find method like:
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I dont think inheritance is going to work here, cos when u write the ejb-ql for the method, there you have to provide the table names and u said each bean has different tables.

Binary Data Type in finder methods for CMP beans

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Using CMP 2.x, your custom finder and select methods are implemented by the container based on the EJB QL query you provide in the ejb-jar.xml. In CMP 1.1, there was no portable way to express the semantics of the query, so most vendors had a vendor-specific syntax for describing the query.
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Using wildcards in custom find methods with CMP beans

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I'd like to create a custom find method called findByName which accepts a string. I'd typically want to use the string in a '%<name>%' scenario, where the user needn't type in the whole name. Does anybody know what the partial query should look like? I'm not sure how to concatenate the '%' symbol to the string taken in.
Thanks in advance
Gillian

Gillian-
Bind variables are of the form $1, $2, etc., so try using a query stmt like this:
select * from YOURTABLE where name like '%$1%'
Regards,
-Jon

How to implement Find & Replace

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Hi there,
the latest stage of SimplyHTML implements find & replace. You can find all (app, docs, sources) at http://www.lightdev.com/template.php4?id=3
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How To Implement Find Option

Hello frnds,
I am working on a project whose aim is to make an editor completely in java. But i m unable to implement feature like Find.
Please suggest me how to implement this.
Thnx

if your editor is a jtextarea, i would suggest something like that:
String textTyped = textarea.getText();
String lookForText = new JOptionPane.showInputDialog("text you look for?");
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textArea.moveCaretPosition(indexOfTheText);maybe the instruction to focus on the caret after the caret move is missing here
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How to implement custom methods on form submit

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Edited by: sgodavar on Sep 29, 2010 1:13 PM

Suganth,
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How to make find methods return a subset of the result?

Take the multipage apps for instance,
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Maybe you're looking for something like a "Value List Handler"
http://developer.java.sun.com/developer/restricted/patterns/ValueListHandler.html

Finder Methods other than by Primary key

How should the Finder methods other than by Primary
key in Container MB be implemented? In Bean class?
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Sriram

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CMP Entity Bean with ejb-ql finder methods and INFORMIX database

Hi,
I have some CMP Entity Beans with finder methods defined in ejb-ql. In my ejb-jar, within <entity> definitions I have something like:
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      <cmp-field><field-name>fieldTwo</field-name></cmp-field>
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    <entity>
And in persistent.xml:
<db-properties>
     <data-source-name>datasource_name</data-source-name>
</db-properties>
<entity-bean>
     <ejb-name>BeanName</ejb-name>
     <table-name>table_name</table-name>
     <field-map key-type="NoKey">
     <field-name>fieldOne</field-name>
     <column><column-name>column_one</column-name></column>
      </field-map>
     <field-map key-type="NoKey">
     <field-name>fieldTwo</field-name>
     <column><column-name>column_two</column-name></column>
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      <finder-descriptor>
          <method-name>findAll</method-name>
          <method-params/>
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Once deployed, on server side, I can found a java source file (with corresponding compiled class file) in path:
j2ee/cluster/server0/apps/companyName/MyEARApp/EJBContainer/temp/temp38837373733/route/to/package/
with names:
BeanName0_0pm.java
BeanName0_0PM.class
and the generated java file contains this code:
public java.util.Enumeration ejbFindAll() throws javax.ejb.FinderException, javax.ejb.EJBException {
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    PreparedStatement pSt = null;
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    int status = javax.transaction.xa.XAResource.TMSUCCESS;
    try {
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      pSt = conn.prepareStatement("SELECT \"O\".\"COLUMN_ONE\",\"O\".\"COLUMN_TWO\", FROM \"TABLE_NAME\" \"O\"");
      ejb_rs = pSt.executeQuery();
I'm trying to call this method but it throws a SQLException when preparing the statement.
It seems that Informix does not like this SQL syntax because of upper case names, doble quotes on table alias, or something else.
When editing persistent.xml in netweaver, I can define the element <datasource-vendor> as ORACLE, SAPDB, MS_SQL_SERVER, DB2_UDB_AS400 or DB2_UDB_OS390 but INFORMIX is not an accepted value.
Is there any way to define how this SQL query is build?
Thanks in advance.

The return type of the finder method defined in the remote home interface is either the entity bean's remote interface or a collection of objects implementing the entity bean's remote interface. The return type of the finder method defined in the local home interface is either the entity bean's local interface or a collection of objects implementing the entity bean's local interface

EJB CMP finder methods

The Oracle documents suggests that the following definition in the EJBHome is enough to create a finder method
public Enumeration findByWhere(String where) throws RemoteException, FinderException;
I get a java.lang.AbstractMethodError on the client when I try to call this - suggesting the the container is not implementing the method for me.
I see no place in the oracle descriptor to define these finder methods.
What is the deal with these ? How does one use CMP and Finder methods other than the standard "findByPrimaryKey(....)
thanks
null

Hello,
Let say you don't want to uyse the defualt finder methods, then you can write your own like:
(in client servlet/JSP file etc..)
emps = home.findByLast_name(request.getParameter("searchText")); //find by last name
where:
step 1) go to EJB class editor (under your main EJB directory)
step 2) click on finder tab and click add, to add new finder methods
step 3) (you can click help now to get more info on this..anyways) findBy<CMB field>
would automatically check the "Managed by OC4j" check box, this means that you have matched a signature tag for finders (kind of like setXX and getXX if you are doing JavaBean...automatically done for you)
step 4) else you can make one that is not up like findWildCard(String wildCard):
i)by specifying the Method name to be: findWildCard
ii)parameter (String type: wildCard)
step 5) rebuild the EJB directory after you add this method
step 6) use it in any of you client servlet/JSP as you would with the defualt findAll() methods etc..
cheers,
-Long
[email protected]

How to limit a number of rows to be returned in finder method

are there any way we can specify the # of rows to be returned in a finder method for an CMP? how should we specify that within the xml configuration files?

Hi
Sorry to say that u can't do it in the current versions. Only thing u can do is to get all of them and filter them out at the client or servlet layer.
For exapmle if u get the Enumeration (say 25 objects), and u want to show 10 at a time. Keep a variable that keep track of the page number (eg whether it's the first 10 set of records nor next). Keep the Enumeraton that u got in the session (so that u don't get it everytime). When next is pressed, depending on the value of the varaible storing page number skip those number of records in the Enumeratin (eg if u are going to the second page, the number of records to skip will be 1*10 = 10, and get records form 11 to 20 and so on........
What do u say.......this is how I did it in an appilaction.........
Chandan.

How to implement find methods in CMP?

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