Groovy Connector Toolkit

ICF provides a generic Groovy Connector Toolkit that enables you to run a Groovy script for any ICF operation, such as search, update, create, and others, on any external resource.

The Groovy Connector Toolkit is not a complete connector in the traditional sense. Rather, it is a framework within which you must write your own Groovy scripts to address the requirements of your implementation.

Configuring Scripted Groovy Connectors

The Groovy Connector Toolkit is bundled in the JAR openidm/connectors/groovy-connector-1.5.7.0.jar.

The Samples Guide describes a number of scripted connector implementations. The scripts provided with these samples demonstrate how the Groovy Connector Toolkit can be used. These scripts cannot be used as is in your deployment, but are a good starting point on which to base your customization. For information about writing your own scripts, see Writing Scripted Connectors With the Groovy Connector Toolkit.

You specify the connector configuration in your project's conf/provisioner.openicf-connector.json file. A number of sample configurations for scripted Groovy implementations are provided in openidm/samples/example-configurations/provisioners/provisioner.openicf-scriptedimpementation.json. Use these as the basis for configuring your own scripted connector.

The scripted SQL connector uses the Tomcat JDBC Connection Pool to managed its connections. Occasionally, a JDBC resource that is accessed by the scripted SQL connector might become unavailable for a period. When the resource comes back online, IDM is generally able to recover automatically and resume operations. However, the connector might not be able to refresh its connection pool and might then pass a closed connection to its scripts. This can affect operations until IDM is restarted.

To avoid this situation, you can configure connection validation, where connections are validated before being borrowed from the connection pool.

To configure connection validation, add the following properties to the configurationProperties object in your connector configuration:

testOnBorrow

Validates the connection object before it is borrowed from the pool. If the object fails to validate, it is dropped from the pool and the connector attempts to borrow another object.

For this property to have an effect, you must set validationQuery to a non-null string.

validationQuery

The SQL query used to validate connections from the pool before returning them to the caller.

The precise query will differ, depending on the database that you are accessing. The following list provides sample queries for common databases:

HyperSQL DataBase (HSQLDB)
select 1 from INFORMATION_SCHEMA.SYSTEM_USERS
Oracle DB
select 1 from dual
DB2
select 1 from sysibm.sysdummy1
MySQL
select 1
Microsoft SQL
select 1
PostgreSQL
select 1
Ingres Database
select 1
Apache Derby
values 1
H2 Database
select 1
Firebird SQL
select 1 from rdb$database
validationInterval

Specifies the maximum frequency (in milliseconds) at which validation is run. If a connection is due for validation but was previously validated within this interval, it is not validated again.

The larger the value, the better the connector performance. However, with a large value you increase the chance of a stale connection being presented to the connector.

Connection validation can have an impact on performance and should not be done too frequently. With the following configuration, connections are validated no more than every 34 seconds:

{
    ...
    "configurationProperties" : {
        ...
        "testOnBorrow" : true,
        "validationQuery" : "select 1 from dual",
        "validationInterval" : 34000,
        ...
    },
    ...
}

The customConfiguration and customSensitiveConfiguration properties enable you to inject custom properties into your scripts. Properties listed in customSensitiveConfiguration are encrypted.

For example, the following excerpt of the scripted Kerberos provisioner file shows how these properties inject the Kerberos user and encrypted password into the scripts, using the kadmin command.

"customConfiguration" : "kadmin { cmd = '/usr/sbin/kadmin.local'; user='<KADMIN USERNAME>'; default_realm='<REALM>' }",
"customSensitiveConfiguration" : "kadmin { password = '<KADMIN PASSWORD>'}",

When you call a Groovy script from the Groovy connector, you can use the SLF4J logging facility to obtain debug information.

For instructions on how to use this facility, see the KnowledgeBase article How do I add logging to Groovy scripts in IDM.

The first time a script is read, it is compiled (from Groovy script to Java bytecode) and cached in memory. Each time the script is called, the Groovy script engine checks the last modified timestamp of the script file to see if it has changed. If it has not changed, the cached bytecode is executed. If it has changed, the script is reloaded, compiled and cached.

Implemented Interfaces

The following tables list the ICF interfaces that are implemented for non-poolable and poolable connector implementations:

OpenICF Interfaces Implemented by the Scripted Groovy Connector

The Scripted Groovy Connector implements the following OpenICF interfaces.

Authenticate

Provides simple authentication with two parameters, presumed to be a user name and password.

Create

Creates an object and its uid.

Delete

Deletes an object, referenced by its uid.

Resolve Username

Resolves an object by its username and returns the uid of the object.

Schema

Describes the object types, operations, and options that the connector supports.

Script on Connector

Enables an application to run a script in the context of the connector. Any script that runs on the connector has the following characteristics:

  • The script runs in the same execution environment as the connector and has access to all the classes to which the connector has access.

  • The script has access to a connector variable that is equivalent to an initialized instance of the connector. At a minimum, the script can access the connector configuration.

  • The script has access to any script-arguments passed in by the application.

Script on Resource

Runs a script on the target resource that is managed by this connector.

Search

Searches the target resource for all objects that match the specified object class and filter.

Sync

Polls the target resource for synchronization events, that is, native changes to objects on the target resource.

Test

Tests the connector configuration. Testing a configuration checks all elements of the environment that are referred to by the configuration are available. For example, the connector might make a physical connection to a host that is specified in the configuration to verify that it exists and that the credentials that are specified in the configuration are valid.

This operation might need to connect to a resource, and, as such, might take some time. Do not invoke this operation too often, such as before every provisioning operation. The test operation is not intended to check that the connector is alive (that is, that its physical connection to the resource has not timed out).

You can invoke the test operation before a connector configuration has been validated.

Update

Updates (modifies or replaces) objects on a target resource.

OpenICF Interfaces Implemented by the Scripted Poolable Groovy Connector

The Scripted Poolable Groovy Connector implements the following OpenICF interfaces.

Authenticate

Provides simple authentication with two parameters, presumed to be a user name and password.

Create

Creates an object and its uid.

Delete

Deletes an object, referenced by its uid.

Resolve Username

Resolves an object by its username and returns the uid of the object.

Schema

Describes the object types, operations, and options that the connector supports.

Script on Connector

Enables an application to run a script in the context of the connector. Any script that runs on the connector has the following characteristics:

  • The script runs in the same execution environment as the connector and has access to all the classes to which the connector has access.

  • The script has access to a connector variable that is equivalent to an initialized instance of the connector. At a minimum, the script can access the connector configuration.

  • The script has access to any script-arguments passed in by the application.

Script on Resource

Runs a script on the target resource that is managed by this connector.

Search

Searches the target resource for all objects that match the specified object class and filter.

Sync

Polls the target resource for synchronization events, that is, native changes to objects on the target resource.

Test

Tests the connector configuration. Testing a configuration checks all elements of the environment that are referred to by the configuration are available. For example, the connector might make a physical connection to a host that is specified in the configuration to verify that it exists and that the credentials that are specified in the configuration are valid.

This operation might need to connect to a resource, and, as such, might take some time. Do not invoke this operation too often, such as before every provisioning operation. The test operation is not intended to check that the connector is alive (that is, that its physical connection to the resource has not timed out).

You can invoke the test operation before a connector configuration has been validated.

Update

Updates (modifies or replaces) objects on a target resource.

Configuration Properties

The following tables list the configuration properties for non-poolable and poolable connector implementations:

Scripted Groovy Connector Configuration

The Scripted Groovy Connector has the following configurable properties.

Configuration Properties

PropertyTypeDefault Encrypted [a] Required [b]
customSensitiveConfiguration GuardedString null

Custom Sensitive Configuration script for Groovy ConfigSlurper

customConfiguration String null

Custom Configuration script for Groovy ConfigSlurper

[a] Indicates whether the property value is considered confidential, and therefore encrypted in OpenIDM.

[b] A list of operations in this column indicates that the property is required for those operations.

Operation Script Files Properties

PropertyTypeDefault Encrypted [a] Required [b]
createScriptFileName String null
Create

The name of the file used to perform the CREATE operation.

customizerScriptFileName String null

The script used to customize some function of the connector. Read the documentation for more details.

authenticateScriptFileName String null
Authenticate

The name of the file used to perform the AUTHENTICATE operation.

scriptOnResourceScriptFileName String null
Script On Resource

The name of the file used to perform the RUNSCRIPTONRESOURCE operation.

deleteScriptFileName String null
Delete

The name of the file used to perform the DELETE operation.

resolveUsernameScriptFileName String null
Resolve Username

The name of the file used to perform the RESOLVE_USERNAME operation.

searchScriptFileName String null
Get
Search

The name of the file used to perform the SEARCH operation.

updateScriptFileName String null
Update

The name of the file used to perform the UPDATE operation.

schemaScriptFileName String null
Schema

The name of the file used to perform the SCHEMA operation.

testScriptFileName String null
Test

The name of the file used to perform the TEST operation.

syncScriptFileName String null
Sync

The name of the file used to perform the SYNC operation.

[a] Indicates whether the property value is considered confidential, and therefore encrypted in OpenIDM.

[b] A list of operations in this column indicates that the property is required for those operations.

Groovy Engine configuration Properties

PropertyTypeDefault Encrypted [a] Required [b]
targetDirectory File null

Directory into which to write classes.

warningLevel int 1

Warning Level of the compiler

scriptExtensions String[] ['groovy']

Gets the extensions used to find groovy files

minimumRecompilationInterval int 100

Sets the minimum of time after a script can be recompiled.

scriptBaseClass String null

Base class name for scripts (must derive from Script)

scriptRoots String[] null

The root folder to load the scripts from. If the value is null or empty the classpath value is used.

tolerance int 10

The error tolerance, which is the number of non-fatal errors (per unit) that should be tolerated before compilation is aborted.

debug boolean false

If true, debugging code should be activated

classpath String[] []

Classpath for use during compilation.

disabledGlobalASTTransformations String[] null

Sets a list of global AST transformations which should not be loaded even if they are defined in META-INF/org.codehaus.groovy.transform.ASTTransformation files. By default, none is disabled.

verbose boolean false

If true, the compiler should produce action information

sourceEncoding String UTF-8

Encoding for source files

recompileGroovySource boolean false

If set to true recompilation is enabled

[a] Indicates whether the property value is considered confidential, and therefore encrypted in OpenIDM.

[b] A list of operations in this column indicates that the property is required for those operations.

Scripted Poolable Groovy Connector Configuration

The Scripted Poolable Groovy Connector has the following configurable properties.

Configuration Properties

PropertyTypeDefault Encrypted [a] Required [b]
customSensitiveConfiguration GuardedString null

Custom Sensitive Configuration script for Groovy ConfigSlurper

customConfiguration String null

Custom Configuration script for Groovy ConfigSlurper

[a] Indicates whether the property value is considered confidential, and therefore encrypted in OpenIDM.

[b] A list of operations in this column indicates that the property is required for those operations.

Operation Script Files Properties

PropertyTypeDefault Encrypted [a] Required [b]
createScriptFileName String null
Create

The name of the file used to perform the CREATE operation.

customizerScriptFileName String null

The script used to customize some function of the connector. Read the documentation for more details.

authenticateScriptFileName String null
Authenticate

The name of the file used to perform the AUTHENTICATE operation.

scriptOnResourceScriptFileName String null
Script On Resource

The name of the file used to perform the RUNSCRIPTONRESOURCE operation.

deleteScriptFileName String null
Delete

The name of the file used to perform the DELETE operation.

resolveUsernameScriptFileName String null
Resolve Username

The name of the file used to perform the RESOLVE_USERNAME operation.

searchScriptFileName String null
Get
Search

The name of the file used to perform the SEARCH operation.

updateScriptFileName String null
Update

The name of the file used to perform the UPDATE operation.

schemaScriptFileName String null
Schema

The name of the file used to perform the SCHEMA operation.

testScriptFileName String null
Test

The name of the file used to perform the TEST operation.

syncScriptFileName String null
Sync

The name of the file used to perform the SYNC operation.

[a] Indicates whether the property value is considered confidential, and therefore encrypted in OpenIDM.

[b] A list of operations in this column indicates that the property is required for those operations.

Groovy Engine configuration Properties

PropertyTypeDefault Encrypted [a] Required [b]
targetDirectory File null

Directory into which to write classes.

warningLevel int 1

Warning Level of the compiler

scriptExtensions String[] ['groovy']

Gets the extensions used to find groovy files

minimumRecompilationInterval int 100

Sets the minimum of time after a script can be recompiled.

scriptBaseClass String null

Base class name for scripts (must derive from Script)

scriptRoots String[] null

The root folder to load the scripts from. If the value is null or empty the classpath value is used.

tolerance int 10

The error tolerance, which is the number of non-fatal errors (per unit) that should be tolerated before compilation is aborted.

debug boolean false

If true, debugging code should be activated

classpath String[] []

Classpath for use during compilation.

disabledGlobalASTTransformations String[] null

Sets a list of global AST transformations which should not be loaded even if they are defined in META-INF/org.codehaus.groovy.transform.ASTTransformation files. By default, none is disabled.

verbose boolean false

If true, the compiler should produce action information

sourceEncoding String UTF-8

Encoding for source files

recompileGroovySource boolean false

If set to true recompilation is enabled

[a] Indicates whether the property value is considered confidential, and therefore encrypted in OpenIDM.

[b] A list of operations in this column indicates that the property is required for those operations.

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