...
The
...
functionality
...
of
...
the
...
...
allows
...
for
...
writing
...
some
...
really
...
fun
...
service
...
locator
...
code.
...
Creating
...
the
...
exact
...
layout
...
you
...
want
...
using
...
the
...
exact
...
data
...
you
...
want
...
means
...
you
...
can
...
create
...
robust
...
libraries
...
for
...
pulling
...
things
...
out
...
of
...
JNDI.
...
Lookup
...
examples
...
To
...
get
...
the
...
creative
...
juices
...
flowing
...
here
...
are
...
a
...
few
...
examples
...
of
...
lookup
...
methods
...
you
...
could
...
create
...
for
...
your
...
service
...
locator,
...
the
...
jndi
...
name
...
formats
...
that
...
would
...
work
...
with
...
those
...
lookups,
...
and
...
examples
...
of
...
client
...
code
...
using
...
the
...
service
...
locator.
...
For
...
simplicity,
...
we'll
...
assume
...
all
...
the
...
lookup
...
examples
...
start
...
with
...
this
...
basic
...
class
...
that
...
has
...
a
...
built-in
...
lookup
...
allowing
...
for
...
a
...
common
...
prefix
...
to
...
be
...
optionally
...
applied
...
to
...
the
...
beginning
...
of
...
all
...
lookup
...
strings.
| Code Block | ||||
|---|---|---|---|---|
| =
| |||
} public class MyLocator { private final Context context; public MyLocator(String commonPrefix) throws NamingException { this(null); } public MyLocator(String commonPrefix) throws NamingException { Properties properties = new Properties(); properties.put(Context.INITIAL_CONTEXT_FACTORY, "org.apache.openejb.client.RemoteInitialContextFactory"); properties.put(Context.PROVIDER_URL, "ejbd://localhost:4201/"); this.context = new InitialContext(properties); } public Object lookup(String name) { try { if (commonPrefix != null) name = commonPrefix + "/" +name; return context.lookup(name); } catch (NamingException e) { throw new IllegalArgumentException(e); } } } { |
Just the interface
Usable with JNDI name formats ending in the full class name of the interface such as:
- {interfaceClass}
| Code Block |
|---|
code}
h2. Just the interface
Usable with JNDI name formats ending in the full class name of the interface such as:
- \{interfaceClass}
{code}
public <T> T lookup(Class<T> type) {
return (T) lookup(type.getName());
}
|
| Code Block |
|---|
{code} {code} MyLocator locator = new MyLocator(); Widget widget = locator.lookup(Widget.class); {code} |
Or
...
with
...
a
...
common
...
prefix
...
or
...
with
...
a
...
common
...
prefix
...
supplied
...
in
...
constructor
...
such
...
as:
...
- {moduleId}/
...
- {interfaceClass}
...
- ejb/
...
- {moduleId}/
...
- {interfaceClass}
| Code Block |
|---|
} MyLocator locator = new MyLocator("ejb/superbiz"); Widget widget = locator.lookup(Widget.class); Store store = locator.lookup(Store.class); {code} h2. Interface class and a prefix Usable with JNDI name formats including a varying prefix |
Interface class and a prefix
Usable with JNDI name formats including a varying prefix such as ejbName or deploymentID
and ending in the full class name of the interface
- {ejbName}/{interfaceClass}
- {deploymentId}/{interfaceClass}
| Code Block |
|---|
such as ejbName or deploymentID
and ending in the full class name of the interface
- \{ejbName}/\{interfaceClass}
- \{deploymentId}/\{interfaceClass}
{code}
public <T> T lookup(String prefix, Class<T> type) {
return (T) lookup(prefix + "/" + type.getName());
}
|
| Code Block |
|---|
{code} {code} MyLocator locator = new MyLocator(); Widget redWidget = locator.lookup("RedWidgetBean", Widget.class); Widget blueWidget = locator.lookup("BlueWidgetBean", Widget.class); {code} |
Or
...
with
...
a
...
common
...
prefix
...
or
...
with
...
a
...
common
...
prefix
...
supplied
...
in
...
constructor
...
such
...
as:
...
- {moduleId}/
...
- {ejbName}/
...
- {interfaceClass}
...
- ejb/
...
- {moduleId}/
...
- {deploymentId}/
...
- {interfaceClass}
| Code Block |
|---|
} MyLocator locator = new MyLocator("accountingApp"); Widget widget = locator.lookup("RedWidgetBean", Widget.class); Store store = locator.lookup("StoreBean", Store.class); {code} h2. Interface class and ejb class Usable with JNDI name formats comprised of the interfaceClass |
Interface class and ejb class
Usable with JNDI name formats comprised of the interfaceClass and ejbClass
For variation, the interface class is the prefix and the ejb class is the
suffix. This is neat as the the prefix (the interface class name) becomes
a jndi context with one binding in it for each implementing ejb class.
Works with:
- {interfaceClass}/{ejbClass}
| Code Block |
|---|
and ejbClass For variation, the interface class is the prefix and the ejb class is the suffix. This is neat as the the prefix (the interface class name) becomes a jndi context with one binding in it for each implementing ejb class. Works with: - \{interfaceClass}/\{ejbClass} {code} public <T> T lookup(Class<T> type, Class ejbClass) { return (T) lookup(type.getName() + "/" + ejbClass.getName()); } { |
| Code Block |
|---|
} {code} MyLocator locator = new MyLocator(); Widget widget = locator.lookup(Widget.class, BlueWidgetBean.class); {code} |
Or
...
with
...
a
...
common
...
prefix
...
or
...
with
...
a
...
common
...
prefix
...
supplied
...
in
...
constructor
...
such
...
as:
...
- {moduleId}/
...
- {interfaceClass}/
...
- {ejbClass}
...
- ejb/
...
- {moduleId}/
...
- {interfaceClass}/
...
- {ejbClass}
| Code Block |
|---|
} MyLocator locator = new MyLocator("ejb/purchasingApp"); Widget widget = locator.lookup(Widget.class, RedWidgetBean.class); Store store = locator.lookup(Store.class, StoreBean.class); {code} h2. Interface class and ejb class with simple names Similar to the above example but using the simple name of the classes resulting in a JNDI tree that's a bit more human readable. - |
Interface class and ejb class with simple names
Similar to the above example but using the simple name of the classes resulting
in a JNDI tree that's a bit more human readable.
- {ejbClass.simpleName}/
...
- {interfaceClass.simpleName}
| Code Block |
|---|
} public <T> T lookup(Class ejbClass, Class<T> type) { return (T) lookup(ejbClass.getSimpleName() + "" + type.getSimpleName()); } { |
| Code Block |
|---|
} {code} MyLocator locator = new MyLocator(); Widget widget = locator.lookup(RedWidgetBean.class, Widget.class); {code} |
Or
...
with
...
a
...
common
...
prefix
...
or
...
with
...
a
...
common
...
prefix
...
supplied
...
in
...
constructor
...
such
...
as:
...
- {moduleId}/
...
- {ejbClass.simpleName}/
...
- {interfaceClass.simpleName}
...
- ejb/
...
- {moduleId}/
...
- {ejbClass.simpleName}/
...
- {interfaceClass.simpleName}
| Code Block |
|---|
} MyLocator locator = new MyLocator("shippingApp"); Widget widget = locator.lookup(GreenWidgetBean.class, Widget.class); Store store = locator.lookup(SuperStoreBean.class, Store.class); {code} |