Page Comparison

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1. ZipWSDLMediaTypeHandler - WSDLs and associated schemas can also be uploaded as .zip files or as .gar files. This handler is used to process such WSDL s and schemas.
   
   
2. ServiceMediaTypeHandler - This handler processes  Handler to process the services being added to the registry.
   
   
3. DeleteServiceHandler - This handler provides the ability to remove the entire heirarchy for a given service while deleting the service.
   
   
4. PolicyMediaTypeHandler - This handler processes the policy files being added to the registry.
   
   
5. XSDMediaTypeHandler - This handler processes the schema types being added to the registry.
   
   
6. EndpointMediaTypeHandler - This handler processes service end-points defined in the WSDL files being uploaded to the registry.

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    <handler class="org.wso2.carbon.governance.registry.extensions.handlers.UriMediaTypeHandler">
        <filter class="org.wso2.carbon.registry.core.jdbc.handlers.filters.MediaTypeMatcher">
            <property name="mediaType">application/vnd.wso2-uri+xml</property>
        </filter>
    </handler>

Extensions Symbolic Link Handler

The main purpose of this handler is to properly remove a symbolic link added to a resource. Given below is the configuration for ExtensionsSymLinkHandler. 

    <handler class="org.wso2.carbon.registry.extensions.handlers.ExtensionsSymLinkHandler">
        <filter class="org.wso2.carbon.registry.core.jdbc.handlers.filters.URLMatcher">
            <property name="pattern">.*</property>
        </filter>
    </handler>

Retention Handler

This handler implements Resource Retention Locking. It checks retention lock conditions before performing the operation. If resource is locked by another user and operation cannot be performed, RegistryException will be thrown with an appropriate message. Given below is the configuration for RetentionHandler. 

    <handler class="org.wso2.carbon.registry.extensions.handlers.RetentionHandler" 
            methods="PUT,DELETE,MOVE,RENAME,IMPORT,COPY,ADD_ASSOCIATION,REMOVE_ASSOCIATION,RESTORE,RESTORE_VERSION">
        <filter class="org.wso2.carbon.registry.core.jdbc.handlers.filters.URLMatcher">
            <property name="pattern">.*</property>
        </filter>
    </handler>

See also Handlers.