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2010-06-01T05:04:00Z

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в 17:44, 31 мая 2010

2010-05-31T17:44:27Z

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== Access a specific object by using the lookup or lookupLink methods ==



<source lang="java">
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.InitialContext;
public class Print {
public static void main(String[] args) throws Exception {
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.fscontext.RefFSContextFactory");
env.put(Context.PROVIDER_URL, "file:/tmp/marketing");
Context initCtx = new InitialContext(env);
File f = (File) initCtx.lookup("reports/report1.txt");
if (f != null) {
BufferedReader br = new BufferedReader(new FileReader(f));
String l = null;
while ((l = br.readLine()) != null)
System.out.println(l);
}
}
}</source>



== Bind class. ==



<source lang="java">
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.naming.Reference;
import javax.naming.Referenceable;
import javax.naming.StringRefAddr;
public class Bind {
public static void main(String[] args) throws Exception {
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.fscontext.RefFSContextFactory");
env.put(Context.PROVIDER_URL, "file:/tmp");
Context initCtx = new InitialContext(env);
initCtx.rebind("Susan", new Car("Toyota", "Camry"));
Car c = (Car) initCtx.lookup("Susan");
System.out.println(c);
}
}
class Car implements Referenceable {
String make;
String model;
public Car(String mk, String md) {
make = mk;
model = md;
}
public Reference getReference() throws NamingException {
String cName = Car.class.getName();
StringRefAddr cRef = new StringRefAddr("Car Description", make + ":" + model);
String cfName = "asdf";
Reference ref = new Reference(cName, cRef, cfName, null);
return ref;
}
public String toString() {
return (make + " " + model);
}
}</source>



== Create Context ==



<source lang="java">
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingEnumeration;
public class List {
public static void main(String[] args) throws Exception {
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.fscontext.RefFSContextFactory");
env.put(Context.PROVIDER_URL, "file:/tmp/marketing");
Object item = null;
Context initCtx = new InitialContext(env);
NamingEnumeration nl = initCtx.list("reports");
if (nl == null)
System.out.println("\nNo items in name list");
else
while (nl.hasMore()) {
item = nl.next();
System.out.println("item"s class is " + item.getClass().getName());
System.out.println(item);
System.out.println("");
}
}
}</source>



== Deleting an Object Binding ==



<source lang="java">
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.InitialContext;
public class Delete {
public static void main(String[] args) throws Exception {
String initalContextString = "/tmp/marketing/reports";
if (args.length < 1) {
System.out.println("Usage: java Delete filename");
System.exit(-1);
}
System.out.println("This program assumes the context is " + initalContextString);
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.fscontext.RefFSContextFactory");
env.put(Context.PROVIDER_URL, "file:" + initalContextString);
Context initCtx = new InitialContext(env);
System.out.println("Attempting to unbind " + args[0]);
initCtx.unbind(args[0]);
System.out.println("Done.");
}
}</source>



== Renaming and Moving an Object ==



<source lang="java">
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.InitialContext;
public class Rename {
public static void main(String[] args) throws Exception {
String initialContextString = "/";
if (args.length < 2) {
System.out.println("Useage: java Rename filename1 filename2");
System.exit(-1);
}
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.fscontext.RefFSContextFactory");
env.put(Context.PROVIDER_URL, "file:" + initialContextString);
Context initCtx = new InitialContext(env);
System.out.println("Renaming " + args[0] + " to " + args[1]);
initCtx.rename(args[0], args[1]);
}
}</source>



== Replacing and Adding Objects ==



<source lang="java">
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
public class Changes {
public static void main(String[] args) throws Exception {
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.fscontext.RefFSContextFactory");
env.put(Context.PROVIDER_URL, "file:/tmp/marketing");
Context initCtx = new InitialContext(env);
initCtx.rename("reports", "oldreports");
initCtx.createSubcontext("reports");
}
}</source>



== returns a NamingEnumeration of people ==



<source lang="java">
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
import javax.naming.directory.SearchResult;
public class FilterExample {
public static void main(String[] argc) throws Exception {
Hashtable env = new Hashtable(11);
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, "ldap://MyHost/o=JNDIExample");
DirContext dctx = new InitialDirContext(env);
String filter = "(&(cn=E*)(account>1005))";
NamingEnumeration result = dctx.search("ou=People", filter, null);
while (result.hasMore()) {
SearchResult sr = (SearchResult) result.next();
System.out.println("Result = " + sr.getName());
}
}
}</source>



== Search Filter Symbols ==



<source lang="java">
Symbol Description
& Logical and. All items in the list must be true, as in (&(a=1)(b=2) ).
| Logical or. One or more of the items must be true, as in (|(a=1)(b=2) ).
! Not. The negated item must be false, as in (!(3=4)) is true.
= Checks for equality based on the matching rule of the attribute.
~= Checks for approximate equality based on the matching rule of the attribute.
>= Checks that the attribute is greater than the value.
<= Checks that the attribute is less than the value.
=* Checks for existence of the attribute.
* In an equality test; represents a wildcard representing zero or more characters at that position, as in (name=Alb*).
\ Used for escaping *, (, and ) inside an attribute value.</source>



== Using a search result, you could you could use the following program to print the results: ==



<source lang="java">
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.directory.Attribute;
import javax.naming.directory.Attributes;
import javax.naming.directory.BasicAttribute;
import javax.naming.directory.BasicAttributes;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
import javax.naming.directory.SearchResult;
public class AttributeExample {
public static void main(String[] argc) throws Exception {
Hashtable env = new Hashtable(11);
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, "ldap://MyHost/o=JNDIExample");
DirContext dctx = new InitialDirContext(env);
Attributes attrs = new BasicAttributes(true);
attrs.put(new BasicAttribute("email"));
attrs.put(new BasicAttribute("website", "www.pri.ru"));
NamingEnumeration result = dctx.search("ou=People", attrs);
while (result.hasMore()) {
SearchResult sr = (SearchResult) result.next();
System.out.println("Result = " + sr.getName());
Attributes srchAttrs = sr.getAttributes();
NamingEnumeration attributes = srchAttrs.getAll();
while (attributes.hasMore()) {
Attribute attr = (Attribute) attributes.next();
System.out.println("Attribute: " + attr.getID());
NamingEnumeration values = attr.getAll();
while (values.hasMore()) {
Object value = values.next();
System.out.println("Value = " + value);
}
}
}
}
}</source>

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Admin: 1 версия

в 17:44, 31 мая 2010