Slides from MWLUG 2014 Build a (Java) Bean Workshop

1. MWLUG
2014
AD104:
Build
a
Bean
Workshop
Mike
McGarel,
Collabora/ve
Solu/ons
Developer,
Czarnowski
Display
Services,
Inc.
Devin
Olson,
Collabora/ve
Solu/ons
Developer,
Czarnowski
Display
Services,
Inc.

2. AD104:
Build
a
Bean
Workshop
Mike
McGarel
Ø Collabora/ve
Solu/ons
Developer
at
Czarnowski
Display
Services
Ø Working
with
Notes/Domino
since
version
4.6
Ø Working
on
the
Web
for
over
14
years
Ø OpenNTF
contributor
Ø Maintain
MWLUG
site

3. AD104:
Build
a
Bean
Workshop
Devin
Olson
Ø Collabora/ve
Solu/ons
Developer
at
Czarnowski
Display
Services
Ø Notes
/
Domino
consultant
since
1995
(that's
R3
for
you
punks)
Ø PCLP
SA/AD
R4.6,
R5,
R6,
R7
(stopped
taking
tests
aWer
that)
Ø Beer
Snob
(Anheuser-­‐Busch
Cer/fied
Beer
Master)
Ø LearningXPages.com

4. AD104:
Build
a
Bean
Workshop
Agenda
Ø Dip
into
Java
beans
Ø App
goal
Ø Time
to
build

5. AD104:
Build
a
Bean
Workshop
LotusScript
and
Java
SimilariDes
Ø LS
has
subs
and
func/ons,
Java
has
methods
Ø Both
strongly
typed
LS:
Dim x As String
Java:
String x
Ø Nearly
exact
syntax:
LS:
collec/on.GetFirstDocument
Java:
collec/on.getFirstDocument()

6. AD104:
Build
a
Bean
Workshop
LotusScript
and
Java
Differences
Ø Case
ma_ers
in
Java
Example:
getFirstDocument()
not
GetFirstDocument()
Ø Beans
persist,
LS
objects
don’t
Ø Java
is
modern,
LS
is
.
.
.

7. AD104:
Build
a
Bean
Workshop
What
do
we
mean
by
“bean”?
A
Java
object
defined
by
specific
standards
Ø Public
Java
class
Ø Serializable
Ø Private
proper/es
(op/onal)
Ø Public
constructor
with
no
arguments
Ø Public
methods
(not
required,
but
kind
of
pointless
without)

8. AD104:
Build
a
Bean
Workshop
What
does
a
bean
look
like?
package com.mwlug;
import java.io.Serializable;
/* other possible libraries */
public class MyClass implements Serializable {
private static final long serialVersionUID = 1L;
private String myText;
/* Other possible variables */
public MyClass() {
}
public String getMyText() {
return myText;
}
public void setMyText (String txt) {
this.myText = txt;
}
/* Other possible methods */
}

9. AD104:
Build
a
Bean
Workshop
Public
Java
Class
package com.mwlug;
import java.io.Serializable;
public class MyClass implements Serializable {

10. AD104:
Build
a
Bean
Workshop
Serializable
package com.mwlug;
import java.io.Serializable;
public class MyClass implements Serializable {
private static final long serialVersionUID =
1L;

11. AD104:
Build
a
Bean
Workshop
Private
ProperDes
public class MyClass implements Serializable {
private static final long serialVersionUID =
1L;
private String myString;
private Integer myInteger;
private List myList;

12. AD104:
Build
a
Bean
Workshop
Public
Constructor
with
No
Arguments
Sample
1
–
no
methods:
public MyClass() {
}
Sample
2
–
with
methods:
public MyClass() {
myString = “This is my string”;
this.myInteger = new Integer(1);
}

13. AD104:
Build
a
Bean
Workshop
Public
Methods
public String getMyText() {
return myText;
}
public void setMyText (String txt) {
this.myText = txt;
}

14. AD104:
Build
a
Bean
Workshop
What
is
a
“managed”
bean?
A
bean
listed
in
the
facesconfig.xml
file.
<managed-bean>
<managed-bean-name>mine
</managed-bean-name>
<managed-bean-class>com.mwlug.MyClass
</managed-bean-class>
<managed-bean-scope>view
</managed-bean-scope>
</managed-bean>

15. AD104:
Build
a
Bean
Workshop
Why
should
I
use
beans?
Ø Reusability
Ø Persistence
Ø Modern
replacement
for
profile
documents
Ø Easy
way
to
load
Java
methods

16. AD104:
Build
a
Bean
Workshop
A
few
words
about
recycling
Ø Related
to
C+,
not
Java
Ø Recycling
releases
the
handle
from
memory
Ø Needed
only
for
Lotus-­‐based
Java
objects,
e.g.,
NotesDatabase,
NotesView,
NotesDocument

17. AD104:
Build
a
Bean
Workshop
Let’s
start
building!

18. AD104:
Build
a
Bean
Workshop
References
Ø Notes
in
9
(notesin9.com)
Ø Head
First
Java
Ø learningXPages.com
Ø Russell
Maher’s
Connect
2013
Master
Class:
XPages
&
Managed
Beans
(slides
on
xpage/ps.blogspot.com)

19. AD104:
Build
a
Bean
Workshop
Thank
You
For
AXending
The
authors
appreciate
any
feedback
or
comments
you
care
to
give.
(appropriate
music
lyric
here)

20. AD104:
Build
a
Bean
Workshop
Contact
Us
Mike
McGarel
Ø Blog:
h_p://www.bleedyellow.com/blogs/McGarelGramming
Ø Twi_er:
@mmcgarel
Ø Email:
mmcgarel@czarnowski.com
Devin
Olson
Ø Blog:
h_p://www.learningxpages.com
Ø Twi_er:
@spanky762
Ø Email:
dolson@czarnowski.com
Ø Facebook:
facebook.com/default.xsp