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<meta name="author" value="Dolf Smits">
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<title>JMeter - JMeter - User's Manual: LDAP Operations</title>
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<a name="ops"><strong>A short LDAP Operations tutorial</strong></a>
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<p>
The extended LDAP sampler was built to support testing for very complex testpurposes.
It was aimed at supporting the LDAP operations as close as possible.
In this short tutorial, I will explain which LDAP operations exist and what they do.
Per operation, I will shortly explain how these operations are implemented.
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LDAP servers are some kind of hierarchical database, they store objects (entries) in a tree. The uppermost part of a tree is called the ROOT of the tree.
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eg. When a tree starts with dc=com, the root equals dc=com.
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The next level can exist under the root, eg dc=Siemens. The full name of this object (the "distinghuised name") is "dc=siemens,dc=com.
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Again, a following level can be made, by adding the user "cn=admin" under dc=siemens,dc=com. This object has a DN (distinguished name) of "cn=admin,dc=siemens,dc=com".
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The relative distinguished name (RDN) is the last part of the DN, eg. cn=admin.
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The characteristics of an object are determined by the objectClasses, which can be seen as a collection of attributes.
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The type of an object is determined by the "structural objectClass" eg person, organizationalUnit or country.
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The attributes contain the data of an object, eg mailadress, name, streetadress etc. Each attribute can have 0, 1 or more values.
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<a name="bind"><strong>1 Bind operation</strong></a>
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Any contact with an LDAP server MUST start with a bind request. LDAP is a state dependent protocol. Without opening a session to
a LDAP server, no additional request can be made.
Due to some peculiarities in the JAVA libraries, 2 different bind operations are implemented.
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<a name="thread_bind"><strong>1.1 Thread Bind</strong></a>
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This bind is meant to open a session to a LDAP server. Any testplan should use this operation as the starting point from a session.
For each Thread (each virtual user) a seperate connection with the LDAP server is build, and so a seperate Thread bind is performed.
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<a name="single"><strong>1.2 Single bind/unbind</strong></a>
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<p>
This bind is used for user authentication verification.
A proper developed LDAP client, who needs an authenticated user, perform a bind with a given distinguished name and password.
This Single bind/unbind operation is for this purpose. It builds it own seperate connection to the LDAP server, performs a
bind operation, and ends the connection again (by sending an unbind).
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<a name="unbind"><strong>2 Unbind</strong></a>
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<p>
To close a connection to a LDAP server, an unbind operation is needed.
As the Single bind/unbind operation already (implicitly) performs an unbind, only a Thread unbind operation is needed.
This Thread unbind just closes the connection and cleans up any resources it has used.
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<a name="compare"><strong>3 Compare</strong></a>
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The compare operation needs the full distinguished name from a LDAP object, as well as a attribute and a value for the attribute.
It will simply check: "Has this object really this attribute with this value?".
Typical use is checking the membership of a certain user with a given group.
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<a name="search"><strong>4 Search</strong></a>
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The search test simply searches for all objects which comply with a given search filter, eg.
all persons with a "employeeType=inactive" or "all persons with a userID equals user1"
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<a name="add"><strong>5 Add</strong></a>
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This simply add an object to the LDAP directory.
Off course the combination of attributes and distinguishedName must be valid!
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<a name="modify"><strong>6 Modify</strong></a>
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<p>
This operation modifies one or more attributes from a given object.
It needs the distinghised name from the object, as well as the attributes and the new values for this attribute.
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Three versions are available, add, for adding an attribute value
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replace, for overwriting the old attribute value with a new value
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delete, to delete a value form an attribute, or to delete all the values of an attribute
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<a name="delete"><strong>7 Delete</strong></a>
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This operation deletes an object from the LDAP server.
It needs the distinghised name from the object.
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<a name="moddn"><strong>8 modDN</strong></a>
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This operation modifies the distinguished name from an object (it "moves" the object).
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It comes in two flavours, just renaming an entry, then you specify a new RDN (relative distinguished name, this is the lowest part of the DN)
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eg, you can rename "cn=admin,dc=siemens,dc=com" to cn=administrator,dc=Siemens,dc=com"
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The second flavour is renaming (moving) a complete subtree by specifying a "new superior"
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eg you can move a complete subtree "ou=retired,ou=people,dc=siemens,dc=com" to a new subtree "ou=retired people,dc=siemens,dc=com" by specifying
a new rdn "ou=retired people" and a new superior of "dc=siemens,dc=com"
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Copyright © 1999-2008, Apache Software Foundation
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