com.unboundid.directory.sdk.sync.api

Class SyncPipePlugin

java.lang.Object

com.unboundid.directory.sdk.sync.api.SyncPipePlugin

All Implemented Interfaces:

Configurable, ExampleUsageProvider, Reconfigurable<SyncPipePluginConfig>, UnboundIDExtension

@Extensible
 @SynchronizationServerExtension(appliesToLocalContent=false,
                                appliesToSynchronizedContent=true)
 @ThreadSafety(level=INTERFACE_THREADSAFE)
public abstract class SyncPipePlugin
extends java.lang.Object
implements UnboundIDExtension, Reconfigurable<SyncPipePluginConfig>, ExampleUsageProvider

This class defines an API that must be implemented by extensions that perform processing on synchronization operations within the Sync Pipe. These extensions may be used to

• Filter out certain changes from being synchronized.
• Add and remove attributes that should be synchronized with the destination independent of whether they changed at the source or not.
• Manipulate the changes that are synchronized to ignore certain modified attributes or change the representation of modified attributes.
• Skip certain steps in Sync Pipe processing, e.g. attribute and DN mapping.

Most plugins will need to override the postMapping method but not the preMapping method. These extensions do not have access to the Sync Source or Sync Destination.

Configuring Sync Pipe Plugins

In order to configure a sync pipe plugin created using this API, use a command like:

      dsconfig create-sync-pipe-plugin \
           --plugin-name "{plugin-name}" \
           --type third-party \
           --set "extension-class:{class-name}" \
           --set "extension-argument:{name=value}"
 

where "{plugin-name}" is the name to use for the sync pipe plugin instance, "{class-name}" is the fully-qualified name of the Java class that extends com.unboundid.directory.sdk.sync.api.SyncPipePlugin, and "{name=value}" represents name-value pairs for any arguments to provide to the sync pipe plugin. If multiple arguments should be provided to the sync pipe plugin, then the "--set extension-argument:{name=value}" option should be provided multiple times.

See Also:

ScriptedSyncPipePlugin

Constructor Summary

Constructors

Constructor and Description
SyncPipePlugin() Creates a new instance of this sync pipe plugin.

Method Summary

Modifier and Type	Method and Description
ResultCode	applyConfiguration(SyncPipePluginConfig config, ArgumentParser parser, java.util.List<java.lang.String> adminActionsRequired, java.util.List<java.lang.String> messages) Attempts to apply the configuration from the provided argument parser to this extension.
void	defineConfigArguments(ArgumentParser parser) Updates the provided argument parser to define any configuration arguments which may be used by this extension.
void	finalizeSyncPipePlugin() Performs any cleanup which may be necessary when this sync pipe plugin is taken out of service.
java.util.Map<java.util.List<java.lang.String>,java.lang.String>	getExamplesArgumentSets() Retrieves a map containing examples of configurations that may be used for this extension.
abstract java.lang.String[]	getExtensionDescription() Retrieves a human-readable description for this extension.
abstract java.lang.String	getExtensionName() Retrieves a human-readable name for this extension.
void	initializeSyncPipePlugin(SyncServerContext serverContext, SyncPipePluginConfig config, ArgumentParser parser) Initializes this sync pipe plugin.
boolean	isConfigurationAcceptable(SyncPipePluginConfig config, ArgumentParser parser, java.util.List<java.lang.String> unacceptableReasons) Indicates whether the configuration represented by the provided argument parser is acceptable for use by this extension.
PostStepResult	postMapping(Entry sourceEntry, Entry equivalentDestinationEntry, SyncOperation operation) This method is called immediately after the attributes and DN in the source entry are mapped into the equivalent destination entry.
PreStepResult	preMapping(Entry sourceEntry, Entry equivalentDestinationEntry, SyncOperation operation) This method is called immediately before the attributes and DN in the source entry are mapped into the equivalent destination entry.
java.lang.String	toString() Retrieves a string representation of this sync pipe plugin.
abstract void	toString(java.lang.StringBuilder buffer) Appends a string representation of this sync pipe plugin to the provided buffer.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

SyncPipePlugin

public SyncPipePlugin()

Creates a new instance of this sync pipe plugin. All sync pipe plugin implementations must include a default constructor, but any initialization should generally be done in the initializeSyncPipePlugin method.

Method Detail

getExtensionName

public abstract java.lang.String getExtensionName()

Retrieves a human-readable name for this extension.

Specified by:

getExtensionName in interface UnboundIDExtension

Returns:

A human-readable name for this extension.

getExtensionDescription

public abstract java.lang.String[] getExtensionDescription()

Retrieves a human-readable description for this extension. Each element of the array that is returned will be considered a separate paragraph in generated documentation.

Specified by:

getExtensionDescription in interface UnboundIDExtension

Returns:

A human-readable description for this extension, or null or an empty array if no description should be available.

defineConfigArguments

public void defineConfigArguments(ArgumentParser parser)
                           throws ArgumentException

Updates the provided argument parser to define any configuration arguments which may be used by this extension. The argument parser may also be updated to define relationships between arguments (e.g., to specify required, exclusive, or dependent argument sets).

Specified by:

defineConfigArguments in interface Configurable

Parameters:

parser - The argument parser to be updated with the configuration arguments which may be used by this extension.

Throws:

ArgumentException - If a problem is encountered while updating the provided argument parser.

initializeSyncPipePlugin

public void initializeSyncPipePlugin(SyncServerContext serverContext,
                                     SyncPipePluginConfig config,
                                     ArgumentParser parser)
                              throws LDAPException

Initializes this sync pipe plugin. This method will be called before any other methods in the class.

Parameters:

serverContext - A handle to the server context for the Data Sync Server in which this extension is running. Extensions should typically store this in a class member.

config - The general configuration for this proxy transformation.

parser - The argument parser which has been initialized from the configuration for this sync pipe plugin.

Throws:

LDAPException - If a problem occurs while initializing this sync pipe plugin.

isConfigurationAcceptable

public boolean isConfigurationAcceptable(SyncPipePluginConfig config,
                                         ArgumentParser parser,
                                         java.util.List<java.lang.String> unacceptableReasons)

Indicates whether the configuration represented by the provided argument parser is acceptable for use by this extension. The parser will have been used to parse any configuration available for this extension, and any automatic validation will have been performed. This method may be used to perform any more complex validation which cannot be performed automatically by the argument parser.

Specified by:

isConfigurationAcceptable in interface Reconfigurable<SyncPipePluginConfig>

Parameters:

config - The general configuration for this extension.

parser - The argument parser that has been used to parse the proposed configuration for this extension.

unacceptableReasons - A list to which messages may be added to provide additional information about why the provided configuration is not acceptable.

Returns:

true if the configuration in the provided argument parser appears to be acceptable, or false if not.

applyConfiguration

public ResultCode applyConfiguration(SyncPipePluginConfig config,
                                     ArgumentParser parser,
                                     java.util.List<java.lang.String> adminActionsRequired,
                                     java.util.List<java.lang.String> messages)

Attempts to apply the configuration from the provided argument parser to this extension.

Specified by:

applyConfiguration in interface Reconfigurable<SyncPipePluginConfig>

Parameters:

config - The general configuration for this extension.

parser - The argument parser that has been used to parse the new configuration for this extension.

adminActionsRequired - A list to which messages may be added to provide additional information about any additional administrative actions that may be required to apply some of the configuration changes.

messages - A list to which messages may be added to provide additional information about the processing performed by this method.

Returns:

A result code providing information about the result of applying the configuration change. A result of SUCCESS should be used to indicate that all processing completed successfully. Any other result will indicate that a problem occurred during processing.

finalizeSyncPipePlugin

public void finalizeSyncPipePlugin()

Performs any cleanup which may be necessary when this sync pipe plugin is taken out of service. This can happen when it is deleted from the configuration and at server shutdown.

preMapping

public PreStepResult preMapping(Entry sourceEntry,
                                Entry equivalentDestinationEntry,
                                SyncOperation operation)

This method is called immediately before the attributes and DN in the source entry are mapped into the equivalent destination entry. This equivalent destination entry is then compared to the actual destination entry to determine which of the modified attributes need to be updated.

This method is typically used to either filter out certain changes (by returning PreStepResult.ABORT_OPERATION) or to manipulate the source entry before it is converted into an equivalent destination entry. Attributes that will not otherwise be affected by attribute mapping can be set in equivalentDestinationEntry. Although, due to the possibility of being overwritten in the mapping phase, manipulation of equivalentDestinationEntry is typically reserved for the postMapping(com.unboundid.ldap.sdk.Entry, com.unboundid.ldap.sdk.Entry, com.unboundid.directory.sdk.sync.types.SyncOperation) method.

The set of source attributes that should be synchronized at the destination can be manipulated by calling SyncOperation.addModifiedSourceAttribute(java.lang.String) and SyncOperation.removeModifiedSourceAttribute(java.lang.String) on operation.

Additional steps must be taken if this plugin adds destination attributes in equivalentDestinationEntry that need to be modified at the destination. For operations with an operation type of SyncOperationType.CREATE, any updates made to equivalentDestinationEntry will be included in the entry created at the destination. However, for operations with an operation type of SyncOperationType.MODIFY, destination attributes added by this plugin that need to be modified must be updated explicitly by calling SyncOperation.addModifiedDestinationAttribute(java.lang.String).

With the exception of aborting changes or skipping the mapping step completely, most plugins will not need to override this method since the postMapping(com.unboundid.ldap.sdk.Entry, com.unboundid.ldap.sdk.Entry, com.unboundid.directory.sdk.sync.types.SyncOperation) method has access to the fully mapped destination entry.

Parameters:

sourceEntry - The entry that was fetched from the source.

equivalentDestinationEntry - The destination entry that is equivalent to the source. This entry will be empty except for any modifications that have been performed by other sync pipe plugins.

operation - The operation that is being synchronized.

Returns:

The result of the plugin processing. Note: PreStepResult#3SKIP_CURRENT_STEP should only be returned if this plugin takes responsibility for fully constructing the equivalent destination entry.

postMapping

public PostStepResult postMapping(Entry sourceEntry,
                                  Entry equivalentDestinationEntry,
                                  SyncOperation operation)

This method is called immediately after the attributes and DN in the source entry are mapped into the equivalent destination entry. Once this mapping is complete, this equivalent destination entry is then compared to the actual destination entry to determine which of the modified attributes need to be updated.

This method is typically used to manipulate the equivalent destination entry before these necessary changes are calculated. It can also be used to filter out certain changes (by returning PostStepResult.ABORT_OPERATION), but this is typically done in the preMapping(com.unboundid.ldap.sdk.Entry, com.unboundid.ldap.sdk.Entry, com.unboundid.directory.sdk.sync.types.SyncOperation) method.

The set of source attributes that should be synchronized at the destination can be manipulated by calling SyncOperation.addModifiedSourceAttribute(java.lang.String) and SyncOperation.removeModifiedSourceAttribute(java.lang.String) on operation.

Additional steps must be taken if this plugin adds destination attributes in equivalentDestinationEntry that need to be modified at the destination. For operations with an operation type of SyncOperationType.CREATE, any updates made to equivalentDestinationEntry will be included in the entry created at the destination. However, for operations with an operation type of SyncOperationType.MODIFY, destination attributes added by this plugin that need to be modified must be updated explicitly by calling SyncOperation.addModifiedDestinationAttribute(java.lang.String).

With the exception of aborting changes or skipping the mapping step completely, most plugins will override this method instead of preMapping(com.unboundid.ldap.sdk.Entry, com.unboundid.ldap.sdk.Entry, com.unboundid.directory.sdk.sync.types.SyncOperation) because this method has access to the fully mapped destination entry.

Parameters:

sourceEntry - The entry that was fetched from the source.

equivalentDestinationEntry - The destination entry that is equivalent to the source. This entry will include all attributes mapped from the source entry.

operation - The operation that is being synchronized.

Returns:

The result of the plugin processing.

toString

public final java.lang.String toString()

Retrieves a string representation of this sync pipe plugin.

Overrides:

toString in class java.lang.Object

Returns:

A string representation of this sync pipe plugin.

toString

public abstract void toString(java.lang.StringBuilder buffer)

Appends a string representation of this sync pipe plugin to the provided buffer.

Parameters:

buffer - The buffer to which the string representation should be appended.

getExamplesArgumentSets

public java.util.Map<java.util.List<java.lang.String>,java.lang.String> getExamplesArgumentSets()

Retrieves a map containing examples of configurations that may be used for this extension. The map key should be a list of sample arguments, and the corresponding value should be a description of the behavior that will be exhibited by the extension when used with that configuration.

Specified by:

getExamplesArgumentSets in interface ExampleUsageProvider

Returns:

A map containing examples of configurations that may be used for this extension. It may be null or empty if there should not be any example argument sets.